Materials Today Sustainability最新文献_第2页

Prospect of gold tailings as a new mineral admixture: Effect on hydration, pore structure and mechanical properties of concrete

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-01-20 DOI: 10.1016/j.mtsust.2025.101078

Shaoyun Hou , Yuehao Guo , Jianwei Sun , Jinming Jiang , Hongyuan Gao , Jie Liu

Gold tailings, with silica (SiO₂) as their primary component, have potential as a mineral admixture. To optimize the utilization of gold tailings while reducing cement consumption, this study investigates their substitution for cement. The effects on fluidity, setting time, mechanical properties, resistivity, hydration products, and pore structure of composite cementitious materials with different gold tailings substitution ratios are explored. Cost effectiveness of these composite concrete was also assessed. Results show that increasing gold tailings substitution moderately reduces fluidity and extends setting time. As low-activity admixtures, gold tailings slightly shorten the dissolution period while prolonging induction and acceleration periods of pastes. They do not alter the hydration product types of cement but improve hydration degree of cement. In the early stages of hydration, a high content of gold tailings increases the number of large-diameter pores. As hydration progresses, these pores are gradually filled by hydration products. Despite a gradual decline in early mechanical strength with increasing gold tailings content, this decline diminishes as hydration progresses at equivalent substitution ratios. Overall, a 10% substitution ratio of gold tailings has proven to be optimal, as the mechanical strength and porosity characteristics of the concrete at 28 d are comparable to those without gold tailings, while also offering similar cost benefits.

{"title":"Prospect of gold tailings as a new mineral admixture: Effect on hydration, pore structure and mechanical properties of concrete","authors":"Shaoyun Hou , Yuehao Guo , Jianwei Sun , Jinming Jiang , Hongyuan Gao , Jie Liu","doi":"10.1016/j.mtsust.2025.101078","DOIUrl":"10.1016/j.mtsust.2025.101078","url":null,"abstract":"<div><div>Gold tailings, with silica (SiO₂) as their primary component, have potential as a mineral admixture. To optimize the utilization of gold tailings while reducing cement consumption, this study investigates their substitution for cement. The effects on fluidity, setting time, mechanical properties, resistivity, hydration products, and pore structure of composite cementitious materials with different gold tailings substitution ratios are explored. Cost effectiveness of these composite concrete was also assessed. Results show that increasing gold tailings substitution moderately reduces fluidity and extends setting time. As low-activity admixtures, gold tailings slightly shorten the dissolution period while prolonging induction and acceleration periods of pastes. They do not alter the hydration product types of cement but improve hydration degree of cement. In the early stages of hydration, a high content of gold tailings increases the number of large-diameter pores. As hydration progresses, these pores are gradually filled by hydration products. Despite a gradual decline in early mechanical strength with increasing gold tailings content, this decline diminishes as hydration progresses at equivalent substitution ratios. Overall, a 10% substitution ratio of gold tailings has proven to be optimal, as the mechanical strength and porosity characteristics of the concrete at 28 d are comparable to those without gold tailings, while also offering similar cost benefits.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101078"},"PeriodicalIF":7.1,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and combustion behavior of carbon-based synfuel from biomass/coal/CaO by co-carbonization process

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-01-20 DOI: 10.1016/j.mtsust.2025.101081

Xinyuan Dong , Peng Xu , Lihua Gao , Xiao Han , Junhong Zhang , Zhijun He

An environmentally friendly and low-cost co-carbonization technology has been reported as an effective route for the preparation of carbon-based synfuel for sintering processes employed in the steel industry, in which loaded CaO catalysts promote the synergistic role between sawdust (SD) and bituminous coal (BC). In this work, a series of experiments were conducted to research the effects of the co-carbonization temperature, co-carbonization holding time and addition amount of CaO on synfuel. Finally, a co-carbonization temperature of 550 °C, a co-carbonization holding time of 30 min, and the added amount of CaO at 4 wt% were reasonable preparation conditions based on the biomass/coal of 4/6. According to the above experimental parameters, the solids yield, bulk density and heat value of SD/BC synfuel were 61.07%, 403 kg m⁻³ and 27.82 MJ kg⁻¹, respectively. These results showed that adding CaO increases the order and density of synfuel microcrystals. For the surface structure, the addition of CaO could improve the content of aromatic CC and C–O, whereas the content of carbonyl CO decreased in the carbonization process, which demonstrated that the addition of CaO could improve transformation of the graphite-like structure. Additionally, SD/BC synfuel loaded with CaO exhibited a rougher surface and larger pores compared to that without CaO loading, and the number of pores decreased because the formation of CaCO₃ coated the synfuel surface. The above indicators of carbon-based synfuel obtained from this study agree with the practical requirements of sintering operations. This work reveals the mechanism of biomass/coal and CaO interaction on the preparation of carbon-based synfuel.

{"title":"Preparation and combustion behavior of carbon-based synfuel from biomass/coal/CaO by co-carbonization process","authors":"Xinyuan Dong , Peng Xu , Lihua Gao , Xiao Han , Junhong Zhang , Zhijun He","doi":"10.1016/j.mtsust.2025.101081","DOIUrl":"10.1016/j.mtsust.2025.101081","url":null,"abstract":"<div><div>An environmentally friendly and low-cost co-carbonization technology has been reported as an effective route for the preparation of carbon-based synfuel for sintering processes employed in the steel industry, in which loaded CaO catalysts promote the synergistic role between sawdust (SD) and bituminous coal (BC). In this work, a series of experiments were conducted to research the effects of the co-carbonization temperature, co-carbonization holding time and addition amount of CaO on synfuel. Finally, a co-carbonization temperature of 550 °C, a co-carbonization holding time of 30 min, and the added amount of CaO at 4 wt% were reasonable preparation conditions based on the biomass/coal of 4/6. According to the above experimental parameters, the solids yield, bulk density and heat value of SD/BC synfuel were 61.07%, 403 kg m<sup>−3</sup> and 27.82 MJ kg<sup>−1</sup>, respectively. These results showed that adding CaO increases the order and density of synfuel microcrystals. For the surface structure, the addition of CaO could improve the content of aromatic C<img>C and C–O, whereas the content of carbonyl C<img>O decreased in the carbonization process, which demonstrated that the addition of CaO could improve transformation of the graphite-like structure. Additionally, SD/BC synfuel loaded with CaO exhibited a rougher surface and larger pores compared to that without CaO loading, and the number of pores decreased because the formation of CaCO<sub>3</sub> coated the synfuel surface. The above indicators of carbon-based synfuel obtained from this study agree with the practical requirements of sintering operations. This work reveals the mechanism of biomass/coal and CaO interaction on the preparation of carbon-based synfuel.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101081"},"PeriodicalIF":7.1,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Potential application of nano-silica in concrete pavement: A bibliographic analysis and comprehensive review

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-01-20 DOI: 10.1016/j.mtsust.2025.101079

Pushpanjali Verma, Shalinee Shukla, Priyaranjan Pal

Rapid population growth in developing countries necessitates high-performance, long-lasting pavement construction. Rigid concrete pavement, commonly used in India, to use for heavy automobile transportation and pedestrian surfaces. However, its high resource consumption, low tensile strength, and initial construction cost are drawbacks. Researchers are exploring the use of nanomaterials in pavement engineering to improve concrete's long-term durability. Nanotechnology is considered the next-generation industrial revolution due to its extraordinary characteristics at a small scale. However, the use of nanomaterials in pavement engineering is still in its early stages. Nanoparticles, which act as fillers and reinforcements in concrete mixtures, enhance the strength and durability of pavements. This is due to the C–S–H gel component of hardened concrete, which is essential for maintaining the pavement's strength and durability. The use of various nanomaterials like nano-silica, nano-CaCO₃, nano-Al₂O₃, nano-TiO₂, and nano-clay is being explored as a partial cement replacement. One of the most exciting nanomaterials, nano-silica, is widely used. The study explores the use of nano-silica as a partial replacement for cement, focusing on its impact on mechanical, durability, and microstructure characteristics of concrete pavements. The optimal percentage of nS, as well as the form of nS (powder or colloidal), to improve cement concrete pavement was investigated in this study. The study suggests that nano-silica-modified concrete pavements can withstand vehicles' dynamic and static loads and are a potential eco-friendly alternative to cementitious composites. More percentage of waste materials can be replaced by adding nS to concrete pavement. In comparison to the powdered form of nS, the colloidal form disperses evenly in the concrete matrix without forming agglomerates. According to the study, raising the nS concentration improves mechanical and durability characteristics at 3%, however, above 5% might induce material degradation.

{"title":"Potential application of nano-silica in concrete pavement: A bibliographic analysis and comprehensive review","authors":"Pushpanjali Verma, Shalinee Shukla, Priyaranjan Pal","doi":"10.1016/j.mtsust.2025.101079","DOIUrl":"10.1016/j.mtsust.2025.101079","url":null,"abstract":"<div><div>Rapid population growth in developing countries necessitates high-performance, long-lasting pavement construction. Rigid concrete pavement, commonly used in India, to use for heavy automobile transportation and pedestrian surfaces. However, its high resource consumption, low tensile strength, and initial construction cost are drawbacks. Researchers are exploring the use of nanomaterials in pavement engineering to improve concrete's long-term durability. Nanotechnology is considered the next-generation industrial revolution due to its extraordinary characteristics at a small scale. However, the use of nanomaterials in pavement engineering is still in its early stages. Nanoparticles, which act as fillers and reinforcements in concrete mixtures, enhance the strength and durability of pavements. This is due to the C–S–H gel component of hardened concrete, which is essential for maintaining the pavement's strength and durability. The use of various nanomaterials like nano-silica, nano-CaCO<sub>3</sub>, nano-Al<sub>2</sub>O<sub>3</sub>, nano-TiO<sub>2</sub>, and nano-clay is being explored as a partial cement replacement. One of the most exciting nanomaterials, nano-silica, is widely used. The study explores the use of nano-silica as a partial replacement for cement, focusing on its impact on mechanical, durability, and microstructure characteristics of concrete pavements. The optimal percentage of nS, as well as the form of nS (powder or colloidal), to improve cement concrete pavement was investigated in this study. The study suggests that nano-silica-modified concrete pavements can withstand vehicles' dynamic and static loads and are a potential eco-friendly alternative to cementitious composites. More percentage of waste materials can be replaced by adding nS to concrete pavement. In comparison to the powdered form of nS, the colloidal form disperses evenly in the concrete matrix without forming agglomerates. According to the study, raising the nS concentration improves mechanical and durability characteristics at 3%, however, above 5% might induce material degradation.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101079"},"PeriodicalIF":7.1,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effects of pore shape and geometry on the storage of CO2 in mesoporous media

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-01-17 DOI: 10.1016/j.mtsust.2025.101076

Siwen Wang, Omer Salim, Mohammad Piri

The confinement of fluids and phase transition is of great interest for gas storage and separation in nanoporous materials. CO₂ adsorption at moderate temperatures is particularly critical for advancing carbon capture and storage. To this end, we investigate the CO₂ isotherm in Mobil Composition of Matter No. 48 (MCM-48), Mobil Composition of Matter No. 41 (MCM-41), and Santa Barbara Amorphous-16 (SBA-16) using a novel patented gravimetric apparatus. Comprehensive characterization of materials was performed using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM), and environmental transmission electron microscopy (ETEM). Specifically, ETEM provided the details about the connectivity and the geometry of mesopores. The results reveal that the relationship between CO₂ adsorption capacity and surface area, as MCM-41, with the largest surface area and pore volume, exhibits a correspondingly the highest CO₂ uptake at bulk pressure and capillary pressure. In addition, it is also observed that smaller pores exhibit low chemical potential, indicating strong fluid-wall interaction and molecular-molecular interaction. The hysteresis was only observed in SBA-16 at −20 °C. Contrary to the traditional assumed pore-blocking effect in inkbottle structures, our findings suggested that pore geometry facilitated evaporation instead of blockage. This research highlights the temperature, pore shape and geometry effect on the storage capacity and adsorption mechanisms. Meanwhile, it compensates for the data gap od CO₂ isotherms in mesoporous material and further contribute to the development of efficient CO₂ capture and storage.

{"title":"The effects of pore shape and geometry on the storage of CO2 in mesoporous media","authors":"Siwen Wang, Omer Salim, Mohammad Piri","doi":"10.1016/j.mtsust.2025.101076","DOIUrl":"10.1016/j.mtsust.2025.101076","url":null,"abstract":"<div><div>The confinement of fluids and phase transition is of great interest for gas storage and separation in nanoporous materials. CO<sub>2</sub> adsorption at moderate temperatures is particularly critical for advancing carbon capture and storage. To this end, we investigate the CO<sub>2</sub> isotherm in Mobil Composition of Matter No. 48 (MCM-48), Mobil Composition of Matter No. 41 (MCM-41), and Santa Barbara Amorphous-16 (SBA-16) using a novel patented gravimetric apparatus. Comprehensive characterization of materials was performed using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM), and environmental transmission electron microscopy (ETEM). Specifically, ETEM provided the details about the connectivity and the geometry of mesopores. The results reveal that the relationship between CO<sub>2</sub> adsorption capacity and surface area, as MCM-41, with the largest surface area and pore volume, exhibits a correspondingly the highest CO<sub>2</sub> uptake at bulk pressure and capillary pressure. In addition, it is also observed that smaller pores exhibit low chemical potential, indicating strong fluid-wall interaction and molecular-molecular interaction. The hysteresis was only observed in SBA-16 at −20 °C. Contrary to the traditional assumed pore-blocking effect in inkbottle structures, our findings suggested that pore geometry facilitated evaporation instead of blockage. This research highlights the temperature, pore shape and geometry effect on the storage capacity and adsorption mechanisms. Meanwhile, it compensates for the data gap od CO<sub>2</sub> isotherms in mesoporous material and further contribute to the development of efficient CO<sub>2</sub> capture and storage.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101076"},"PeriodicalIF":7.1,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigating synergistic effect of controlling hierarchical pore structure and chemical modification on CO2 adsorption kinetics of reduced graphene oxide aerogel

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-01-07 DOI: 10.1016/j.mtsust.2025.101073

Elahe Safaei , Zahra Talebi , Vahid Ghafarinia

The hierarchical pore structure of amine-functionalized reduced graphene oxide aerogels (rGOAs) plays a vital role in CO₂ adsorption. Herein, the self-assembly of rGOAs was investigated by adjusting graphene oxide concentration and reduction time of hydrothermal, and the effect of the hierarchical pore structure on adsorption capacity, kinetics, and rate-limiting models were discussed. The highest CO₂ adsorption (2.7 mmol/g) was achieved under hydrothermal synthesis conditions of 2 mg/mL graphene oxide concentration over 10 h. This high adsorption is attributed to the enhancement in meso and micro surface areas, as indicated by BET results (169 and 152 m²/g, respectively), the presence of adequate macropores (FE-SEM results), the presence of heteroatoms (N and O) according to XPS, FTIR, and EDX results, and a high NH/N_T (-NH- spectral area/total amine spectral areas) ratio of 0.35. Additionally, the highest structural defect (1.17) was observed in RAMAN results. The Elovich model demonstrates good agreement with experimental data, indicating heterogeneous CO₂ adsorption. The high S_m/S_T (micro surface area/micro + meso surface area) ratio (47%) and adequate macropores in the sample prepared with 2 mg/mL graphene oxide and 10 h, led to enhanced CO₂ physisorption. The high surface area increased the accessibility of active sites for chemisorption. The presence of macropores in this sample accelerates the mass transfer of CO₂ molecules, and the initial adsorption rate of the Elovich model (α = 0.032) is the highest. High graphene oxide concentration increased the surface barrier diffusion value due to decreased macropores. Intra-particle diffusion was identified as the rate-limiting kinetic model for CO₂ diffusion.

{"title":"Investigating synergistic effect of controlling hierarchical pore structure and chemical modification on CO2 adsorption kinetics of reduced graphene oxide aerogel","authors":"Elahe Safaei , Zahra Talebi , Vahid Ghafarinia","doi":"10.1016/j.mtsust.2025.101073","DOIUrl":"10.1016/j.mtsust.2025.101073","url":null,"abstract":"<div><div>The hierarchical pore structure of amine-functionalized reduced graphene oxide aerogels (rGOAs) plays a vital role in CO₂ adsorption. Herein, the self-assembly of rGOAs was investigated by adjusting graphene oxide concentration and reduction time of hydrothermal, and the effect of the hierarchical pore structure on adsorption capacity, kinetics, and rate-limiting models were discussed. The highest CO₂ adsorption (2.7 mmol/g) was achieved under hydrothermal synthesis conditions of 2 mg/mL graphene oxide concentration over 10 h. This high adsorption is attributed to the enhancement in meso and micro surface areas, as indicated by BET results (169 and 152 m<sup>2</sup>/g, respectively), the presence of adequate macropores (FE-SEM results), the presence of heteroatoms (N and O) according to XPS, FTIR, and EDX results, and a high NH/N<sub>T</sub> (-NH- spectral area/total amine spectral areas) ratio of 0.35. Additionally, the highest structural defect (1.17) was observed in RAMAN results. The Elovich model demonstrates good agreement with experimental data, indicating heterogeneous CO₂ adsorption. The high S<sub>m</sub>/S<sub>T</sub> (micro surface area/micro + meso surface area) ratio (47%) and adequate macropores in the sample prepared with 2 mg/mL graphene oxide and 10 h, led to enhanced CO₂ physisorption. The high surface area increased the accessibility of active sites for chemisorption. The presence of macropores in this sample accelerates the mass transfer of CO₂ molecules, and the initial adsorption rate of the Elovich model (α = 0.032) is the highest. High graphene oxide concentration increased the surface barrier diffusion value due to decreased macropores. Intra-particle diffusion was identified as the rate-limiting kinetic model for CO₂ diffusion.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101073"},"PeriodicalIF":7.1,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Direct evidence of hydration and temperature effects on the structure, spectroscopy and dynamics of a novel Mn-based organic-inorganic metal halide material for high-performance LEDs

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-01-07 DOI: 10.1016/j.mtsust.2025.101075

Francisco Sánchez , Asmae Ben Abdelhadi , Mario Gutiérrez , Boiko Cohen , Luis Lezama , Abderrazzak Douhal

Low-dimensional organometallic lead-free hybrid halide materials have garnered considerable attention due to their exceptional optoelectronic properties. In this work, a novel 0D hybrid Mn-based metal halide material, (tert-Butylammonium)₃MnBr₅ (1), has been synthesized and characterized. The 1-as-synthesized sample exhibits a dual-band emission spectrum, that is temperature-dependent, and moisture sensitive, with a photoluminescence quantum yield of 34 %. At room temperature, its emission is attributed to free excitons (FE, green emission band originating from the ⁴T₁ → ⁶A¹ transition) and self-trapped excitons (STEs, red emission band) induced by the presence of solvent molecules. The STEs formation takes place in 17 μs leading to an equilibrated excited state with lifetime of ∼135 μs. At high temperatures, a new red-shifted emission band is observed and attributed to a structural transformation from 1 to a novel material with octahedral configuration of the Mn²⁺ centers. 1 has been integrated as phosphor layer of a down-converter LED with tunable CIE coordinates, and good stability of 86 % after 8 h of continuous operation. While these findings give new clues on how the solvent-induced lattice transitions affect the spectroscopy and dynamics of Mn-based luminescent perovskites, they also provide pivotal information to inspire further research on dual emissive lead-free perovskites for photonic applications, like photosensing and lighting.

{"title":"Direct evidence of hydration and temperature effects on the structure, spectroscopy and dynamics of a novel Mn-based organic-inorganic metal halide material for high-performance LEDs","authors":"Francisco Sánchez , Asmae Ben Abdelhadi , Mario Gutiérrez , Boiko Cohen , Luis Lezama , Abderrazzak Douhal","doi":"10.1016/j.mtsust.2025.101075","DOIUrl":"10.1016/j.mtsust.2025.101075","url":null,"abstract":"<div><div>Low-dimensional organometallic lead-free hybrid halide materials have garnered considerable attention due to their exceptional optoelectronic properties. In this work, a novel 0D hybrid Mn-based metal halide material, (tert-Butylammonium)<sub>3</sub>MnBr<sub>5</sub> (<strong>1</strong>), has been synthesized and characterized. The <strong>1-<em>as</em>-synthesized</strong> sample exhibits a dual-band emission spectrum, that is temperature-dependent, and moisture sensitive, with a photoluminescence quantum yield of 34 %. At room temperature, its emission is attributed to free excitons (FE, green emission band originating from the <sup>4</sup>T<sub>1</sub> → <sup>6</sup>A<sup>1</sup> transition) and self-trapped excitons (STEs, red emission band) induced by the presence of solvent molecules. The STEs formation takes place in 17 μs leading to an equilibrated excited state with lifetime of ∼135 μs. At high temperatures, a new red-shifted emission band is observed and attributed to a structural transformation from <strong>1</strong> to a novel material with octahedral configuration of the Mn<sup>2+</sup> centers. <strong>1</strong> has been integrated as phosphor layer of a down-converter LED with tunable CIE coordinates, and good stability of 86 % after 8 h of continuous operation. While these findings give new clues on how the solvent-induced lattice transitions affect the spectroscopy and dynamics of Mn-based luminescent perovskites, they also provide pivotal information to inspire further research on dual emissive lead-free perovskites for photonic applications, like photosensing and lighting.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101075"},"PeriodicalIF":7.1,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the key features for enhanced SrTiO3 functionality: A comprehensive overview

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-01-07 DOI: 10.1016/j.mtsust.2025.101072

Maryam RaeisianAsl, Shirzad Jouybar, Saeedeh Sarabadani Tafreshi, Leila Naji

Strontium titanate (SrTiO₃) is a highly adaptable substance that possesses a diverse array of structural, optical, electrical, magnetic, and thermoelectric characteristics, which have led to its significant investigation in scientific research. This review study offers a thorough and all-encompassing examination of the present comprehension regarding the properties, defects, and potential applications of SrTiO₃. The unique combination of a high dielectric constant, adjustable bandgap, captivating optoelectronic characteristics, and exceptional thermal stability has resulted in the incorporation of SrTiO₃ in a multitude of electronic devices, including capacitors, sensors, and memristors. Moreover, the remarkable catalytic activity and photocatalytic characteristics of SrTiO₃ make it a highly intriguing contender for environmental and energy-related applications. This review attempts to offer a thorough overview of the important features related to SrTiO₃ by analyzing the most recent advancements and insights from the scientific community. The goal is to present the framework for advancements that will occur in the future and breakthroughs in this intriguing material.

{"title":"Exploring the key features for enhanced SrTiO3 functionality: A comprehensive overview","authors":"Maryam RaeisianAsl, Shirzad Jouybar, Saeedeh Sarabadani Tafreshi, Leila Naji","doi":"10.1016/j.mtsust.2025.101072","DOIUrl":"10.1016/j.mtsust.2025.101072","url":null,"abstract":"<div><div>Strontium titanate (SrTiO<sub>3</sub>) is a highly adaptable substance that possesses a diverse array of structural, optical, electrical, magnetic, and thermoelectric characteristics, which have led to its significant investigation in scientific research. This review study offers a thorough and all-encompassing examination of the present comprehension regarding the properties, defects, and potential applications of SrTiO<sub>3</sub>. The unique combination of a high dielectric constant, adjustable bandgap, captivating optoelectronic characteristics, and exceptional thermal stability has resulted in the incorporation of SrTiO<sub>3</sub> in a multitude of electronic devices, including capacitors, sensors, and memristors. Moreover, the remarkable catalytic activity and photocatalytic characteristics of SrTiO<sub>3</sub> make it a highly intriguing contender for environmental and energy-related applications. This review attempts to offer a thorough overview of the important features related to SrTiO<sub>3</sub> by analyzing the most recent advancements and insights from the scientific community. The goal is to present the framework for advancements that will occur in the future and breakthroughs in this intriguing material.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101072"},"PeriodicalIF":7.1,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unlocking the potential of tree bark: Review of approaches from extractives to materials for higher-added value products

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-01-07 DOI: 10.1016/j.mtsust.2025.101074

Didik Supriyadi , Damayanti Damayanti , Stefan Veigel , Christian Hansmann , Wolfgang Gindl-Altmutter

The harvest of trees typically results in the availability of bark biomass as raw material. In 2021, it is estimated that the wood processing sector produced approximately 200 million cubic meters of bark. Despite being commonly regarded as waste or a low-value by-product, this sustainable raw material possesses appealing properties because of its intricate chemistry and structure, which serve as a multifunctional barrier for living trees. Consequently, the majority of studies on the utilization of bark have focused on the extraction of valuable chemical compounds and bioactive agents. A biorefinery approach for bark was proposed to improve the efficiency and economic feasibility of bark utilization. However, relatively few studies have been dedicated to the exploration and enhancement of bark-based products, particularly structural materials. Therefore, this review aims to describe the potential applications that exploit the chemical and physical properties of bark, with an emphasis on structural materials. A brief overview of the structure and chemistry of tree bark is provided, followed by an examination of physical characteristics such as density, mechanics, thermal properties, and caloric value. Finally, the potential applications of bark biomass as a structural material are discussed.

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引用次数: 0

One-step environment-friendly synthesized semiconductor ZnS/OE-PE: Solar light assisted evaluation of antibiotic degradation, Pt-free hydrogen production, and antibacterial assessment

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-01-02 DOI: 10.1016/j.mtsust.2024.101071

Mohammad Ehtisham Khan

The contamination of water resources by pharmaceutical pollutants, such as tetracycline, positions a significant environmental and health concern. Photocatalytic degradation using semiconductor materials has emerged as a promising method to address this challenge. The primary objective of this study is to synthesize zinc-sulfide nanoparticles from a green source (methanolic plant extract of oxystelma esculentum) and investigate their efficiency in tetracycline degradation, hydrogen production, and antibacterial efficacy. The systematic spectroscopic characterizations of the nanoparticles were carried out using several state-of-the-art analytical measurements, such as UV–Vis spectroscopy, FTIR spectroscopy, X-ray diffraction, Scanning electron microscopy, Transmission electron microscopy, Dynamic light scattering, Zeta potential, and X-ray photoelectron spectroscopy. In the photocatalytic degradation experiments of tetracycline, the prepared ZnS nanoparticles exhibited exceptional activity, achieving a remarkable degradation efficiency of 97 % within only 30 min. Moreover, the prepared photocatalyst was examined for its potential to produce hydrogen by photocatalytic water splitting. Prepared nanoparticles exhibited an amount of 18.59 mmol g⁻¹h⁻¹, indicating the befitting potential of the synthesized photocatalyst for H₂ production for consecutive 6 cycles. Finally, the prepared nanoparticles were examined for their antibacterial potential against H1(klebsiella), 38(Bacillus), and E.coli. The observed inhibition values were 6 and 8 nm, respectively, against H1(klebsiella) and 38(Bacillus).

{"title":"One-step environment-friendly synthesized semiconductor ZnS/OE-PE: Solar light assisted evaluation of antibiotic degradation, Pt-free hydrogen production, and antibacterial assessment","authors":"Mohammad Ehtisham Khan","doi":"10.1016/j.mtsust.2024.101071","DOIUrl":"10.1016/j.mtsust.2024.101071","url":null,"abstract":"<div><div>The contamination of water resources by pharmaceutical pollutants, such as tetracycline, positions a significant environmental and health concern. Photocatalytic degradation using semiconductor materials has emerged as a promising method to address this challenge. The primary objective of this study is to synthesize zinc-sulfide nanoparticles from a green source (methanolic plant extract of <em>oxystelma esculentum</em>) and investigate their efficiency in tetracycline degradation, hydrogen production, and antibacterial efficacy. The systematic spectroscopic characterizations of the nanoparticles were carried out using several state-of-the-art analytical measurements, such as UV–Vis spectroscopy, FTIR spectroscopy, X-ray diffraction, Scanning electron microscopy, Transmission electron microscopy, Dynamic light scattering, Zeta potential, and X-ray photoelectron spectroscopy. In the photocatalytic degradation experiments of tetracycline, the prepared ZnS nanoparticles exhibited exceptional activity, achieving a remarkable degradation efficiency of 97 % within only 30 min. Moreover, the prepared photocatalyst was examined for its potential to produce hydrogen by photocatalytic water splitting. Prepared nanoparticles exhibited an amount of 18.59 mmol g<sup>−1</sup>h<sup>−1</sup>, indicating the befitting potential of the synthesized photocatalyst for H<sub>2</sub> production for consecutive 6 cycles. Finally, the prepared nanoparticles were examined for their antibacterial potential against <em>H1(klebsiella), 38(Bacillus),</em> and <em>E.coli</em>. The observed inhibition values were 6 and 8 nm, respectively, against <em>H1(klebsiella)</em> and <em>38(Bacillus)</em>.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101071"},"PeriodicalIF":7.1,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent developments in CO2 permanent storage using mine waste carbonation

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2024-12-27 DOI: 10.1016/j.mtsust.2024.101070

Xingrui Chen, Dazhi Yao, Long Ji, Yonggang Jin

Accelerated climate change driven by human activities necessitates urgent measures to mitigate greenhouse gas emissions, particularly CO₂. Mineral carbonation has gained traction due to its potential to sequester CO₂ permanently in stable carbonate minerals. This review comprehensively examines recent advancements in utilising mine wastes for CO₂ mineral carbonation, focusing on their feasibility, efficiency, and economic viability. Various mine wastes, including ultramafic, sedimentary, and iron-rich wastes, offer substantial CO₂ sequestration potential due to their inherent mineral compositions conducive to carbonation reactions. The utilisation of mine wastes for CO₂ mineral carbonation not only addresses the challenge of managing large volumes of mining by-products but also contributes to reducing atmospheric CO₂ levels. Laboratory and field studies have demonstrated the effectiveness of direct and indirect carbonation processes, highlighting factors such as particle size, temperature, pressure, and mineralogy that influence carbonation efficiency. Despite the promising results, significant obstacles remain, including slow reaction kinetics, high energy and economic costs, and the need for scalable and sustainable solutions. This review identifies key research gaps and proposes strategies to enhance the economic feasibility and scalability of mine waste carbonation. Integrating carbonation processes with existing mining operations and waste management practices can provide synergistic benefits, reducing costs and environmental impacts. Future research should focus on optimising process parameters, developing novel catalysts, and exploring the potential of recovering valuable by-products during carbonation. By addressing these challenges, CO₂ mineral carbonation using mine wastes can become a viable strategy for sustainable mine waste management and climate change mitigation.

{"title":"Recent developments in CO2 permanent storage using mine waste carbonation","authors":"Xingrui Chen, Dazhi Yao, Long Ji, Yonggang Jin","doi":"10.1016/j.mtsust.2024.101070","DOIUrl":"10.1016/j.mtsust.2024.101070","url":null,"abstract":"<div><div>Accelerated climate change driven by human activities necessitates urgent measures to mitigate greenhouse gas emissions, particularly CO<sub>2</sub>. Mineral carbonation has gained traction due to its potential to sequester CO<sub>2</sub> permanently in stable carbonate minerals. This review comprehensively examines recent advancements in utilising mine wastes for CO<sub>2</sub> mineral carbonation, focusing on their feasibility, efficiency, and economic viability. Various mine wastes, including ultramafic, sedimentary, and iron-rich wastes, offer substantial CO<sub>2</sub> sequestration potential due to their inherent mineral compositions conducive to carbonation reactions. The utilisation of mine wastes for CO<sub>2</sub> mineral carbonation not only addresses the challenge of managing large volumes of mining by-products but also contributes to reducing atmospheric CO<sub>2</sub> levels. Laboratory and field studies have demonstrated the effectiveness of direct and indirect carbonation processes, highlighting factors such as particle size, temperature, pressure, and mineralogy that influence carbonation efficiency. Despite the promising results, significant obstacles remain, including slow reaction kinetics, high energy and economic costs, and the need for scalable and sustainable solutions. This review identifies key research gaps and proposes strategies to enhance the economic feasibility and scalability of mine waste carbonation. Integrating carbonation processes with existing mining operations and waste management practices can provide synergistic benefits, reducing costs and environmental impacts. Future research should focus on optimising process parameters, developing novel catalysts, and exploring the potential of recovering valuable by-products during carbonation. By addressing these challenges, CO<sub>2</sub> mineral carbonation using mine wastes can become a viable strategy for sustainable mine waste management and climate change mitigation.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101070"},"PeriodicalIF":7.1,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0