Materials Today Sustainability最新文献

Xanthan gum biopolymer for uniform dispersion of halloysite nanotubes to enhance micro- and macroscopic performance of cementitious composite: A sustainable alternative to chemical surfactants

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

Materials Today Sustainability

Pub Date : 2025-02-13 DOI: 10.1016/j.mtsust.2025.101091

Yaser Rashidi , Lily Li , Asghar Habibnejad Korayem

To fully exploit the potential of halloysite nanotubes (HNTs) in cement-based composites, stable dispersion in cementitious environments is essential. While polycarboxylate ether (PCE) is commonly used for this purpose, xanthan gum (XG) biopolymer offers a greener alternative, providing stable and uniform dispersion. XG-modified HNTs show promise in enhancing the engineering properties of these composites, but their impact on micro- and macroscopic characteristics is still unclear. This study comprehensively assessed the influence of XG-modified HNTs on hydration-phase assemblage, pore structure, microstructural morphology, as well as compressive strength and transport properties in cementitious materials, and compared these results to PCE-modified HNTs in similar systems. The results demonstrated that XG-modified HNTs significantly outperformed PCE-modified HNTs by reducing calcium hydroxide (CH) content and refining CH crystal structures. Additionally, XG-modified HNTs accelerated cement hydration more effectively and promoted enhanced gel structure formation. Importantly, XG-modified HNTs contributed to a greater reduction in pore size and porosity, a more uniform pore distribution, and the formation of a more homogeneous cementitious matrix compared to PCE-modified HNTs. Furthermore, after 90 days, the HNT-XG mixture exhibited increases in compressive strength (14.3%), ultrasonic pulse velocity (7.1%), and electrical resistivity (13.3%) compared to the HNT-PCE mixture. Finally, the sustainability assessment revealed that using XG biopolymer results in 48.6% lower energy consumption, an 89.4% cleaner production process, and 16.3% lower production costs compared to PCE. Consequently, XG biopolymer can be considered a superior and sustainable alternative to chemical surfactants like PCE for the uniform dispersion of HNTs in cementitious systems.

{"title":"Xanthan gum biopolymer for uniform dispersion of halloysite nanotubes to enhance micro- and macroscopic performance of cementitious composite: A sustainable alternative to chemical surfactants","authors":"Yaser Rashidi , Lily Li , Asghar Habibnejad Korayem","doi":"10.1016/j.mtsust.2025.101091","DOIUrl":"10.1016/j.mtsust.2025.101091","url":null,"abstract":"<div><div>To fully exploit the potential of halloysite nanotubes (HNTs) in cement-based composites, stable dispersion in cementitious environments is essential. While polycarboxylate ether (PCE) is commonly used for this purpose, xanthan gum (XG) biopolymer offers a greener alternative, providing stable and uniform dispersion. XG-modified HNTs show promise in enhancing the engineering properties of these composites, but their impact on micro- and macroscopic characteristics is still unclear. This study comprehensively assessed the influence of XG-modified HNTs on hydration-phase assemblage, pore structure, microstructural morphology, as well as compressive strength and transport properties in cementitious materials, and compared these results to PCE-modified HNTs in similar systems. The results demonstrated that XG-modified HNTs significantly outperformed PCE-modified HNTs by reducing calcium hydroxide (CH) content and refining CH crystal structures. Additionally, XG-modified HNTs accelerated cement hydration more effectively and promoted enhanced gel structure formation. Importantly, XG-modified HNTs contributed to a greater reduction in pore size and porosity, a more uniform pore distribution, and the formation of a more homogeneous cementitious matrix compared to PCE-modified HNTs. Furthermore, after 90 days, the HNT-XG mixture exhibited increases in compressive strength (14.3%), ultrasonic pulse velocity (7.1%), and electrical resistivity (13.3%) compared to the HNT-PCE mixture. Finally, the sustainability assessment revealed that using XG biopolymer results in 48.6% lower energy consumption, an 89.4% cleaner production process, and 16.3% lower production costs compared to PCE. Consequently, XG biopolymer can be considered a superior and sustainable alternative to chemical surfactants like PCE for the uniform dispersion of HNTs in cementitious systems.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101091"},"PeriodicalIF":7.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429761","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

One-step calcination strategy of 3D printing CuO–ZnO–ZrO2 catalysts for CO2 hydrogenation using digital light processing (DLP) 利用数字光处理 (DLP) 一步煅烧用于二氧化碳加氢的 3D 打印 CuO-ZnO-ZrO2 催化剂的策略

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

Materials Today Sustainability

Pub Date : 2025-02-09 DOI: 10.1016/j.mtsust.2025.101086

Pengyuan Guan , Yongjie Zhao , Yihui Wu , Weixian Li , Xiao Zhang , Xiang Gao , Xiaoxia Ou , Wai Siong Chai , Yinfeng He , Hao Nan Li

CuO–ZnO–ZrO₂ catalyst attracted significant attention for CO₂ hydrogenation to methanol. Gyroid-based triply period minimal surface lattice structures feature highly ordered porous networks, which could be used to enhance catalytic performance and efficiency. This paper presents a formulating and one-step calcination strategy that united the removal of polymer resin and calcination of catalyst precursor at one temperature. This enabled 3D printing gyroid-structured CuO–ZnO–ZrO₂ catalyst for CO₂ hydrogenation while minimizing the impact of overheating on the catalyst performance. A photocurable formulation loaded with CuO–ZnO–ZrO₂ precursor was developed. Using the optimized formulation, gyroid structures with varying pore sizes were successfully printed and calcined. The optimal lattice wall thickness that balances porosity and structural stability was identified. The results indicate that the resin used for 3D printing was successfully removed at a lower temperature and the catalytic activity of the 3D-printed structured catalyst was retained through the one-step calcination process while the gyroid lattice geometry can enhance catalytic efficiency than cylindrical structure.

{"title":"One-step calcination strategy of 3D printing CuO–ZnO–ZrO2 catalysts for CO2 hydrogenation using digital light processing (DLP)","authors":"Pengyuan Guan , Yongjie Zhao , Yihui Wu , Weixian Li , Xiao Zhang , Xiang Gao , Xiaoxia Ou , Wai Siong Chai , Yinfeng He , Hao Nan Li","doi":"10.1016/j.mtsust.2025.101086","DOIUrl":"10.1016/j.mtsust.2025.101086","url":null,"abstract":"<div><div>CuO–ZnO–ZrO<sub><em>2</em></sub> catalyst attracted significant attention for CO<sub>2</sub> hydrogenation to methanol. Gyroid-based triply period minimal surface lattice structures feature highly ordered porous networks, which could be used to enhance catalytic performance and efficiency. This paper presents a formulating and one-step calcination strategy that united the removal of polymer resin and calcination of catalyst precursor at one temperature. This enabled 3D printing gyroid-structured CuO–ZnO–ZrO<sub>2</sub> catalyst for CO<sub>2</sub> hydrogenation while minimizing the impact of overheating on the catalyst performance. A photocurable formulation loaded with CuO–ZnO–ZrO<sub>2</sub> precursor was developed. Using the optimized formulation, gyroid structures with varying pore sizes were successfully printed and calcined. The optimal lattice wall thickness that balances porosity and structural stability was identified. The results indicate that the resin used for 3D printing was successfully removed at a lower temperature and the catalytic activity of the 3D-printed structured catalyst was retained through the one-step calcination process while the gyroid lattice geometry can enhance catalytic efficiency than cylindrical structure.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101086"},"PeriodicalIF":7.1,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429760","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

MXene nanofluids in advanced applications: An in-depth review of thermophysical characteristics and technological innovations

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

Materials Today Sustainability

Pub Date : 2025-02-05 DOI: 10.1016/j.mtsust.2025.101084

Sridhar Kulandaivel , Ngui Wai Keng , Mahendran Samykano , Subbarama Kousik Suraparaju , Mohd Fairusham Ghazali , Reji Kumar Rajamony , Nurhanis Sofiah Abd Ghafar

Nanofluids have emerged as a promising solution to the challenge of enhancing heat transfer in modern energy applications. MXene-based nanofluids stand out due to their exceptional optical and thermophysical properties, making them highly suitable for diverse industrial applications. However, challenges such as agglomeration and stability have hindered their widespread commercial adoption despite their potential. This review provides a comprehensive overview of MXene nanofluids, focusing on their synthesis, properties, and strategies to manage accumulation and stability. The review highlights innovative approaches to mitigate agglomeration issues while enhancing thermal properties and ensuring long-term stability in heating and cooling applications. The transformative potential of MXene nanofluids extends to electronics, automotive cooling systems, renewable energy, and biomedical applications. This review underscores the importance of future research efforts to examine the stability and physical characteristics of MXene nanofluids thoroughly. By laying the groundwork for further exploration, this review serves as a valuable resource for researchers seeking to optimize MXene nanofluids for specific applications, promising improvements in heat transfer efficiency, economic feasibility, and environmental sustainability compared to conventional heat transfer fluids.

{"title":"MXene nanofluids in advanced applications: An in-depth review of thermophysical characteristics and technological innovations","authors":"Sridhar Kulandaivel , Ngui Wai Keng , Mahendran Samykano , Subbarama Kousik Suraparaju , Mohd Fairusham Ghazali , Reji Kumar Rajamony , Nurhanis Sofiah Abd Ghafar","doi":"10.1016/j.mtsust.2025.101084","DOIUrl":"10.1016/j.mtsust.2025.101084","url":null,"abstract":"<div><div>Nanofluids have emerged as a promising solution to the challenge of enhancing heat transfer in modern energy applications. MXene-based nanofluids stand out due to their exceptional optical and thermophysical properties, making them highly suitable for diverse industrial applications. However, challenges such as agglomeration and stability have hindered their widespread commercial adoption despite their potential. This review provides a comprehensive overview of MXene nanofluids, focusing on their synthesis, properties, and strategies to manage accumulation and stability. The review highlights innovative approaches to mitigate agglomeration issues while enhancing thermal properties and ensuring long-term stability in heating and cooling applications. The transformative potential of MXene nanofluids extends to electronics, automotive cooling systems, renewable energy, and biomedical applications. This review underscores the importance of future research efforts to examine the stability and physical characteristics of MXene nanofluids thoroughly. By laying the groundwork for further exploration, this review serves as a valuable resource for researchers seeking to optimize MXene nanofluids for specific applications, promising improvements in heat transfer efficiency, economic feasibility, and environmental sustainability compared to conventional heat transfer fluids.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101084"},"PeriodicalIF":7.1,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419885","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

Rationally designed bulky MoS2@C@MoS2 hierarchical materials as an enhanced anode for lithium-ion batteries

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

Materials Today Sustainability

Pub Date : 2025-01-25 DOI: 10.1016/j.mtsust.2025.101083

Chenglong Peng , Yinchang Li , Mingming Shi , Jiahong Wang

The hierarchical material integrates the advantages of each component and is an ideal structure for efficiently storing lithium ions. However, constructing hybrid structures with excellent physical/electrochemical properties, notably bulky natural minerals, remains challenging. Herein, the precursor decomposition method built a bulky three-layer MoS₂@C@MoS₂ hierarchical materials. Ultrathin MoS₂ nanoarrays grow vertically on the surface of nitrogen-doped carbon-coated expanded molybdenite (MoS₂@C). MoS₂ nanosheets and bulky expanded molybdenite have the same composition, which is beneficial for reducing side reactions. MoS₂ nanosheets shorten the ion diffusion and electron transport paths and ensure the efficient penetration of electrolytes and full contact between electrolyte and electrode. The hierarchical design not only effectively retains the high energy density of the bulky material but also has the high specific capacity of the nanomaterials. As a result, the MoS₂@C@MoS₂ hierarchical material displays a high specific capacity of 1035 mAh g⁻¹ at 100 mA g⁻¹ after 200 cycles and 860 mAh g⁻¹ even at 1 A g⁻¹, demonstrating decent stable cycle life and rate performance. Additionally, the synthesis strategy of hierarchical materials proposed here offers a general route to design other bulky mineral materials.

{"title":"Rationally designed bulky MoS2@C@MoS2 hierarchical materials as an enhanced anode for lithium-ion batteries","authors":"Chenglong Peng , Yinchang Li , Mingming Shi , Jiahong Wang","doi":"10.1016/j.mtsust.2025.101083","DOIUrl":"10.1016/j.mtsust.2025.101083","url":null,"abstract":"<div><div>The hierarchical material integrates the advantages of each component and is an ideal structure for efficiently storing lithium ions. However, constructing hybrid structures with excellent physical/electrochemical properties, notably bulky natural minerals, remains challenging. Herein, the precursor decomposition method built a bulky three-layer MoS<sub>2</sub>@C@MoS<sub>2</sub> hierarchical materials. Ultrathin MoS<sub>2</sub> nanoarrays grow vertically on the surface of nitrogen-doped carbon-coated expanded molybdenite (MoS<sub>2</sub>@C). MoS<sub>2</sub> nanosheets and bulky expanded molybdenite have the same composition, which is beneficial for reducing side reactions. MoS<sub>2</sub> nanosheets shorten the ion diffusion and electron transport paths and ensure the efficient penetration of electrolytes and full contact between electrolyte and electrode. The hierarchical design not only effectively retains the high energy density of the bulky material but also has the high specific capacity of the nanomaterials. As a result, the MoS<sub>2</sub>@C@MoS<sub>2</sub> hierarchical material displays a high specific capacity of 1035 mAh g<sup>−1</sup> at 100 mA g<sup>−1</sup> after 200 cycles and 860 mAh g<sup>−1</sup> even at 1 A g<sup>−1</sup>, demonstrating decent stable cycle life and rate performance. Additionally, the synthesis strategy of hierarchical materials proposed here offers a general route to design other bulky mineral materials.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101083"},"PeriodicalIF":7.1,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096308","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

Refurbished zinc manganese oxides from waste batteries as a supercapacitor asymmetric cell: A second life to battery waste

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

Materials Today Sustainability

Pub Date : 2025-01-22 DOI: 10.1016/j.mtsust.2025.101077

M.A. Almeida , A. Adán-Más , P. Arévalo-Cid , Lorena Alcaraz , Félix A. López , T.M. Silva , M.F. Montemor

Alkaline Zn/C batteries are major market players in the portable battery sector that produce an overwhelming amount of waste which is a major cause of soil contamination. These batteries, however, contain metal compounds of relevance, whose recycling enables an important source of raw materials for new electrochemical energy storage devices. However, novel recycling solutions require the development of simple pathways to deliver ready-to-use active materials for immediate application in energy storage systems, thus contributing towards waste revalorization and circular economy development.

In this work, an asymmetric supercapacitor cell assembled with electrodes made of recycled Zinc–Manganese oxide and commercial carbon YP50, was tested in Na₂SO₄ electrolyte. The results evidenced an exceptional cycling stability over 5000 cycles with 91% long-term capacitance retention, a high capacitance of 12.9 F/g (1 A/g) and a power density of 4.12 kW/kg (10 A/g), with 88% high-rate capability. The electrodes made with the recovered materials were fully characterized using 3D electrochemical impedance spectroscopy (EIS) mapping to detail the mechanisms governing the electrochemical response of the cell. This approach evidenced a surface-based pseudocapacitive mechanism where the charging process dictates the overall performance of the cell. The excellent performance of the recycled materials will certainly encourage circular economy and future waste-recovery initiatives, aiding in the sustainable development of future energy storage materials.

{"title":"Refurbished zinc manganese oxides from waste batteries as a supercapacitor asymmetric cell: A second life to battery waste","authors":"M.A. Almeida , A. Adán-Más , P. Arévalo-Cid , Lorena Alcaraz , Félix A. López , T.M. Silva , M.F. Montemor","doi":"10.1016/j.mtsust.2025.101077","DOIUrl":"10.1016/j.mtsust.2025.101077","url":null,"abstract":"<div><div>Alkaline Zn/C batteries are major market players in the portable battery sector that produce an overwhelming amount of waste which is a major cause of soil contamination. These batteries, however, contain metal compounds of relevance, whose recycling enables an important source of raw materials for new electrochemical energy storage devices. However, novel recycling solutions require the development of simple pathways to deliver ready-to-use active materials for immediate application in energy storage systems, thus contributing towards waste revalorization and circular economy development.</div><div>In this work, an asymmetric supercapacitor cell assembled with electrodes made of recycled Zinc–Manganese oxide and commercial carbon YP50, was tested in Na<sub>2</sub>SO<sub>4</sub> electrolyte. The results evidenced an exceptional cycling stability over 5000 cycles with 91% long-term capacitance retention, a high capacitance of 12.9 F/g (1 A/g) and a power density of 4.12 kW/kg (10 A/g), with 88% high-rate capability. The electrodes made with the recovered materials were fully characterized using 3D electrochemical impedance spectroscopy (EIS) mapping to detail the mechanisms governing the electrochemical response of the cell. This approach evidenced a surface-based pseudocapacitive mechanism where the charging process dictates the overall performance of the cell. The excellent performance of the recycled materials will certainly encourage circular economy and future waste-recovery initiatives, aiding in the sustainable development of future energy storage materials.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101077"},"PeriodicalIF":7.1,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136371","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

Promotional role of methanol and CO2 in carbon dioxide-rich syngas hydrogenation over slurry reactor utilizing combustion induced Cu-based catalysts

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

Materials Today Sustainability

Pub Date : 2025-01-22 DOI: 10.1016/j.mtsust.2025.101082

Vaibhav Pandey , Priyanshu Pratap Singh , Kamal Kishore Pant , Sreedevi Upadhyayula , Siddhartha Sengupta

Converting CO₂ to methanol directly remains a hurdle due to catalyst and thermodynamic limitations. This study proposes a solution: using Cu–MgO–CeO₂ (CuMgCe) catalysts (synthesized by solvent combustion) in slurry reactors for methanol formation through methanol-assisted CO₂-rich syngas hydrogenation. The key innovation lies in the catalyst design by focusing on CO₂-rich syngas mixtures, we establish a crucial link between catalyst structure and its activity (structure-activity relationship). Our CuMgCe catalyst achieves a space-time yield of 646 g_MeOH/kg_cat-h⁻¹, exceeding lab-made industrial catalysts (608.5 g_MeOH/kg_cat-h⁻¹). This yield is further boosted by 5% through an ingenious method - adding initial methanol, which promotes formate intermediates for enhanced productivity. In-depth analysis reveals CO₂ formation during CO-TPD-MS and CO-TPR-MS, generating highly active surface species (CO₂^δ−) ideal for forming formate intermediates. In-situ DRIFTS confirms the dominance of this formate pathway on CuMgCe for selective methanol synthesis. A mechanistic study sheds light on the synergistic effect of MgO and CeO₂ in the lab-prepared CuMgCe catalyst. This synergy promotes methanol formation during CO₂-cofed syngas conversion. This research paves the way for highly efficient and selective catalysts for CO₂ utilization in slurry reactor technology, offering a significant step towards cleaner fuel production.

{"title":"Promotional role of methanol and CO2 in carbon dioxide-rich syngas hydrogenation over slurry reactor utilizing combustion induced Cu-based catalysts","authors":"Vaibhav Pandey , Priyanshu Pratap Singh , Kamal Kishore Pant , Sreedevi Upadhyayula , Siddhartha Sengupta","doi":"10.1016/j.mtsust.2025.101082","DOIUrl":"10.1016/j.mtsust.2025.101082","url":null,"abstract":"<div><div>Converting CO<sub>2</sub> to methanol directly remains a hurdle due to catalyst and thermodynamic limitations. This study proposes a solution: using Cu–MgO–CeO<sub>2</sub> (CuMgCe) catalysts (synthesized by solvent combustion) in slurry reactors for methanol formation through methanol-assisted CO<sub>2</sub>-rich syngas hydrogenation. The key innovation lies in the catalyst design by focusing on CO<sub>2</sub>-rich syngas mixtures, we establish a crucial link between catalyst structure and its activity (structure-activity relationship). Our CuMgCe catalyst achieves a space-time yield of 646 g<sub>MeOH</sub>/kg<sub>cat</sub>-h<sup>−1</sup>, exceeding lab-made industrial catalysts (608.5 g<sub>MeOH</sub>/kg<sub>cat</sub>-h<sup>−1</sup>). This yield is further boosted by 5% through an ingenious method - adding initial methanol, which promotes formate intermediates for enhanced productivity. In-depth analysis reveals CO<sub>2</sub> formation during CO-TPD-MS and CO-TPR-MS, generating highly active surface species (CO<sub>2</sub><sup>δ−</sup>) ideal for forming formate intermediates. In-situ DRIFTS confirms the dominance of this formate pathway on CuMgCe for selective methanol synthesis. A mechanistic study sheds light on the synergistic effect of MgO and CeO<sub>2</sub> in the lab-prepared CuMgCe catalyst. This synergy promotes methanol formation during CO<sub>2</sub>-cofed syngas conversion. This research paves the way for highly efficient and selective catalysts for CO<sub>2</sub> utilization in slurry reactor technology, offering a significant step towards cleaner fuel production.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101082"},"PeriodicalIF":7.1,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096307","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

Utilization of industrial, agricultural, and construction waste in cementitious composites: A comprehensive review of their impact on concrete properties and sustainable construction practices

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

Materials Today Sustainability

Pub Date : 2025-01-21 DOI: 10.1016/j.mtsust.2025.101080

Fahad Alsharari

The escalating global demand for concrete, coupled with the environmental impact of cement production, necessitates the exploration of sustainable alternatives. This paper aims to quantitatively evaluate the potential of industrial, agricultural, and construction & demolition (C&D) waste as supplemental cementitious materials (SCMs) or aggregate replacements in concrete. A comprehensive literature review assessed the mechanical, physical, and microstructural properties of concrete modified with these waste materials. Critical parameters such as compressive strength, flexural strength, workability, and durability were analyzed at various replacement levels. The results show that fly ash (FA, optimal replacement: 10–20%) can improve compressive strength by up to 30% at 28 days while reducing permeability and increasing long-term durability by 15–20%. Ground Granulated Blast Furnace Slag, GGBFS) at 30% replacement enhances compressive strength by 25%, and Metakaolin (MK, optimal replacement: 10%) can refine pore structure and increase strength by 40%. Rice Husk Ash (RHA) at 20% replacement improves compressive strength by up to 25% but decreases workability by 10–15%. Palm Oil Fuel Ash (POFA, 10–20% replacement) also shows strength gains of 15–20%, though it requires careful processing to maintain workability. Corn Cob Ash (CCA, 10% replacement) demonstrates moderate strength improvement of 10–15%. For C&D wastes, waste glass (10–30% replacement) reduces environmental impact and enhances compressive strength by up to 20%. Waste ceramic (10–50% replacement) improves compressive strength by 15–25% and durability by 20–30%. Waste rubber, primarily used for energy absorption at 5–25% replacement, enhances ductility by up to 50%, though it slightly reduces compressive strength by 5–10%. This review confirms that incorporating waste materials into concrete enhances its mechanical properties and reduces its environmental footprint. However, variability in material composition, optimization of mix designs, and long-term performance assessment require further research. The quantitative analysis provides clear guidelines for effectively utilizing waste materials in concrete, contributing to a more sustainable construction industry.

{"title":"Utilization of industrial, agricultural, and construction waste in cementitious composites: A comprehensive review of their impact on concrete properties and sustainable construction practices","authors":"Fahad Alsharari","doi":"10.1016/j.mtsust.2025.101080","DOIUrl":"10.1016/j.mtsust.2025.101080","url":null,"abstract":"<div><div>The escalating global demand for concrete, coupled with the environmental impact of cement production, necessitates the exploration of sustainable alternatives. This paper aims to quantitatively evaluate the potential of industrial, agricultural, and construction & demolition (C&D) waste as supplemental cementitious materials (SCMs) or aggregate replacements in concrete. A comprehensive literature review assessed the mechanical, physical, and microstructural properties of concrete modified with these waste materials. Critical parameters such as compressive strength, flexural strength, workability, and durability were analyzed at various replacement levels. The results show that fly ash (FA, optimal replacement: 10–20%) can improve compressive strength by up to 30% at 28 days while reducing permeability and increasing long-term durability by 15–20%. Ground Granulated Blast Furnace Slag, GGBFS) at 30% replacement enhances compressive strength by 25%, and Metakaolin (MK, optimal replacement: 10%) can refine pore structure and increase strength by 40%. Rice Husk Ash (RHA) at 20% replacement improves compressive strength by up to 25% but decreases workability by 10–15%. Palm Oil Fuel Ash (POFA, 10–20% replacement) also shows strength gains of 15–20%, though it requires careful processing to maintain workability. Corn Cob Ash (CCA, 10% replacement) demonstrates moderate strength improvement of 10–15%. For C&D wastes, waste glass (10–30% replacement) reduces environmental impact and enhances compressive strength by up to 20%. Waste ceramic (10–50% replacement) improves compressive strength by 15–25% and durability by 20–30%. Waste rubber, primarily used for energy absorption at 5–25% replacement, enhances ductility by up to 50%, though it slightly reduces compressive strength by 5–10%. This review confirms that incorporating waste materials into concrete enhances its mechanical properties and reduces its environmental footprint. However, variability in material composition, optimization of mix designs, and long-term performance assessment require further research. The quantitative analysis provides clear guidelines for effectively utilizing waste materials in concrete, contributing to a more sustainable construction industry.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101080"},"PeriodicalIF":7.1,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096832","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

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.

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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.

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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.

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引用次数: 0