Pub Date : 2024-12-13DOI: 10.1016/j.nxmate.2024.100452
Jian Sun, Tao Xue, Juan Liu
Large adsorption capacity and rapid adsorption efficiency properties of adsorbents are desirable in wastewater treatment. This study reports porous carbon derived from natural Carex meyeriana Kunth to rapidly adsorb methylene blue (MB). Carex meyeriana Kunth derived porous carbon with abundant π-π stacking and O-H bond was successfully synthesized. The high content π-π stacking and O-H bond on the adsorbent surface leads to the rapid adsorption of MB by adsorption capacity test. The optimized adsorbent presented an adsorption capacity of 150.3 mg·g−1 of MB within 10 mins at pH 7, and its adsorption capacity was competitive with commercial activated carbon (163.7 mg·g−1). The Langmuir adsorption isotherm models are utiliized to describe adsorption equilibrium. The adsorption kinetics of MB on the optimized adsorbent can be well analyzed with pseudo second-order kinetics. This study presents a new perspective for controllable surface modification of porous carbon adsorbents for efficient and rapid removal of dyes.
{"title":"Biomass-derived porous carbon for rapid adsorption of methylene blue in aqueous solution","authors":"Jian Sun, Tao Xue, Juan Liu","doi":"10.1016/j.nxmate.2024.100452","DOIUrl":"10.1016/j.nxmate.2024.100452","url":null,"abstract":"<div><div>Large adsorption capacity and rapid adsorption efficiency properties of adsorbents are desirable in wastewater treatment. This study reports porous carbon derived from natural Carex meyeriana Kunth to rapidly adsorb methylene blue (MB). Carex meyeriana Kunth derived porous carbon with abundant π-π stacking and O-H bond was successfully synthesized. The high content π-π stacking and O-H bond on the adsorbent surface leads to the rapid adsorption of MB by adsorption capacity test. The optimized adsorbent presented an adsorption capacity of 150.3 mg·g<sup>−1</sup> of MB within 10 mins at pH 7, and its adsorption capacity was competitive with commercial activated carbon (163.7 mg·g<sup>−1</sup>). The Langmuir adsorption isotherm models are utiliized to describe adsorption equilibrium. The adsorption kinetics of MB on the optimized adsorbent can be well analyzed with pseudo second-order kinetics. This study presents a new perspective for controllable surface modification of porous carbon adsorbents for efficient and rapid removal of dyes.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100452"},"PeriodicalIF":0.0,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143160064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The quest for biopolymeric-based heterogeneous catalysts is rapidly increasing owing to added intrinsic recompense. In this study, Chitosan-2, 6-pyridine dicarbamide (CPDC) ligand, and its metal ion complexes [M-CPDC] were synthesized by direct combination method. The characterization of the complexes by FTIR suggested that the amide coordinated with the metal ion through the carbonyl of the amide group. The SEM micrograph of [M-CPDC] showed discrete particles in contrast to the rough surface of CPDC which suggests coordination. The XRD diffractogram of chitosan, CPDC, and [M-CPDC] revealed semi-crystalline, amorphous, and crystalline respectively. The [M-CPDC] were applied as heterogeneous catalysts for the reduction of toxic organic pollutants, 4-Nitrophenol to an environmentally friendly 4-Aminophenol. The synthesized catalysts lowered the activation energy (Ea) range of 0.84–1.30 kJmol−1. However, [CPDC-Ni] showed the highest activity (Ea = 0.84 kJmol−1). The synthesized catalysts displayed higher catalytic activities (reduction process within 60 s) than previously reported. The catalysts were reusable at least five times in the reduction of 4-Nitrophenol.
{"title":"Late transition metal complexes bearing chitosan-2,6-pyridine dicarbamide as an intrinsic heterogeneous catalytic converter of 4-nitrophenol","authors":"Lateefah Olanike Adebayo , Samuel Adeolu Olugbemi , Anike Adebayo , Olubunmi Kolawole Akiode , Moriam Dasola Adeoye , Onome Ejeromedoghene , Sheriff Adewuyi","doi":"10.1016/j.nxmate.2024.100454","DOIUrl":"10.1016/j.nxmate.2024.100454","url":null,"abstract":"<div><div>The quest for biopolymeric-based heterogeneous catalysts is rapidly increasing owing to added intrinsic recompense. In this study, Chitosan-2, 6-pyridine dicarbamide (CPDC) ligand, and its metal ion complexes [M-CPDC] were synthesized by direct combination method. The characterization of the complexes by FTIR suggested that the amide coordinated with the metal ion through the carbonyl of the amide group. The SEM micrograph of [M-CPDC] showed discrete particles in contrast to the rough surface of CPDC which suggests coordination. The XRD diffractogram of chitosan, CPDC, and [M-CPDC] revealed semi-crystalline, amorphous, and crystalline respectively. The [M-CPDC] were applied as heterogeneous catalysts for the reduction of toxic organic pollutants, 4-Nitrophenol to an environmentally friendly 4-Aminophenol. The synthesized catalysts lowered the activation energy (<em>E</em><sub><em>a</em></sub>) range of 0.84–1.30 kJmol<sup>−1</sup>. However, [CPDC-Ni] showed the highest activity (<em>E</em><sub><em>a</em></sub> = 0.84 kJmol<sup>−1</sup>). The synthesized catalysts displayed higher catalytic activities (reduction process within 60 s) than previously reported. The catalysts were reusable at least five times in the reduction of 4-Nitrophenol.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100454"},"PeriodicalIF":0.0,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-10DOI: 10.1016/j.nxmate.2024.100451
Y.S. Wang , J.Q. Yao , D.X. Wang , S.R. Li , Y. Shi , Z.H. Yin , X.P. Dong , X.W. Liu
The AlCoCrFeNi2.1 eutectic high-entropy alloy (EHEA) presents a promising balance between high strength and ductility, with its excellent mechanical properties maintained up to 600–700 °C. C doping has been shown to further enhance its strength. However, the phase stability of the alloy remains uncertain. This study evaluated the microstructure and phase stability of both the as-cast AlCoCrFeNi2.1 EHEA and its C-doped counterpart, (AlCoCrFeNi2.1)97C3, at 600 °C. After 20 days of annealing, the eutectic structure of the AlCoCrFeNi2.1 EHEA exhibited slight coarsening in localized areas without phase decomposition. In contrast, the C-doped alloy developed needle-like and granular precipitates within the BCC phase.
{"title":"Microstructure and phase stability of C-doped AlCoCrFeNi2.1 eutectic high-entropy alloys at 600 °C","authors":"Y.S. Wang , J.Q. Yao , D.X. Wang , S.R. Li , Y. Shi , Z.H. Yin , X.P. Dong , X.W. Liu","doi":"10.1016/j.nxmate.2024.100451","DOIUrl":"10.1016/j.nxmate.2024.100451","url":null,"abstract":"<div><div>The AlCoCrFeNi<sub>2.1</sub> eutectic high-entropy alloy (EHEA) presents a promising balance between high strength and ductility, with its excellent mechanical properties maintained up to 600–700 °C. C doping has been shown to further enhance its strength. However, the phase stability of the alloy remains uncertain. This study evaluated the microstructure and phase stability of both the as-cast AlCoCrFeNi<sub>2.1</sub> EHEA and its C-doped counterpart, (AlCoCrFeNi<sub>2.1</sub>)<sub>97</sub>C<sub>3</sub>, at 600 °C. After 20 days of annealing, the eutectic structure of the AlCoCrFeNi<sub>2.1</sub> EHEA exhibited slight coarsening in localized areas without phase decomposition. In contrast, the C-doped alloy developed needle-like and granular precipitates within the BCC phase.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100451"},"PeriodicalIF":0.0,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143160640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study introduces a novel method for blending inorganic materials and polymer liquid crystals. The proposed method involves the in-situ preparation of Fe[Fe(CN)6] in hydroxypropyl cellulose to form a helical polymer liquid crystal. The chemical structures, optical properties, and magnetic properties of the composite constituting Fe[Fe(CN)6] and hydroxypropyl cellulose were characterized using a superconducting quantum interference device, optical spectroscopy, X-ray fluorescence, and synchrotron X-ray diffraction. The obtained composite was an optically active ferromagnetic material because of the combination of the magnetic property of Fe[Fe(CN)6] and supramolecular chirality of hydroxypropyl cellulose.
{"title":"Preparation of an optically active ferromagnet composite via the in-situ synthesis of Fe[Fe(CN)6] in a helical polymer liquid crystal","authors":"Ryo Miyashita , Takashi Tomita , Reiji Kumai , Hiromasa Goto","doi":"10.1016/j.nxmate.2024.100448","DOIUrl":"10.1016/j.nxmate.2024.100448","url":null,"abstract":"<div><div>This study introduces a novel method for blending inorganic materials and polymer liquid crystals. The proposed method involves the in-situ preparation of Fe[Fe(CN)<sub>6</sub>] in hydroxypropyl cellulose to form a helical polymer liquid crystal. The chemical structures, optical properties, and magnetic properties of the composite constituting Fe[Fe(CN)<sub>6</sub>] and hydroxypropyl cellulose were characterized using a superconducting quantum interference device, optical spectroscopy, X-ray fluorescence, and synchrotron X-ray diffraction. The obtained composite was an optically active ferromagnetic material because of the combination of the magnetic property of Fe[Fe(CN)<sub>6</sub>] and supramolecular chirality of hydroxypropyl cellulose.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100448"},"PeriodicalIF":0.0,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-06DOI: 10.1016/j.nxmate.2024.100450
Wasif ur Rehman , Yanan Ma , Zahoor khan , Fatima Zahra Ait Laaskri , Jiawei Xu , Umar Farooq , Awais Ghani , Hamid Rehman , Youlong Xu
Biomass-derived carbon offers a promising solution for energy storage due to its low-cost abundance and environmentally sustainable nature. However, biomass carbon materials (BCMs) possess differing physical and chemical properties, which may affect their performance in energy storage applications. It is crucial to tailor the materials for specific applications to achieve consistency and controllable properties, such as pore structure, surface chemistry, and electrical conductivity. Herein, we comprehensively summarize biomass preparation methods and their diverse structures for energy storage validation. This review systematically explains the natural advantages of materials derived from biomass and their use as electrodes in advanced rechargeable batteries, such as lithium-ion, sodium-ion, potassium-ion, lithium-sulfur, and other batteries. This study provided the current research state on biomass-based carbon, encompassing its synthesis, properties, and electrochemical performance. Finally, we discuss the existing challenges and future opportunities to explore further the potential of biomass-derived carbon for the energy storage sector.
{"title":"Biomass-derived carbon materials for batteries: Navigating challenges, structural diversities, and future perspective","authors":"Wasif ur Rehman , Yanan Ma , Zahoor khan , Fatima Zahra Ait Laaskri , Jiawei Xu , Umar Farooq , Awais Ghani , Hamid Rehman , Youlong Xu","doi":"10.1016/j.nxmate.2024.100450","DOIUrl":"10.1016/j.nxmate.2024.100450","url":null,"abstract":"<div><div>Biomass-derived carbon offers a promising solution for energy storage due to its low-cost abundance and environmentally sustainable nature. However, biomass carbon materials (BCMs) possess differing physical and chemical properties, which may affect their performance in energy storage applications. It is crucial to tailor the materials for specific applications to achieve consistency and controllable properties, such as pore structure, surface chemistry, and electrical conductivity. Herein, we comprehensively summarize biomass preparation methods and their diverse structures for energy storage validation. This review systematically explains the natural advantages of materials derived from biomass and their use as electrodes in advanced rechargeable batteries, such as lithium-ion, sodium-ion, potassium-ion, lithium-sulfur, and other batteries. This study provided the current research state on biomass-based carbon, encompassing its synthesis, properties, and electrochemical performance. Finally, we discuss the existing challenges and future opportunities to explore further the potential of biomass-derived carbon for the energy storage sector.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100450"},"PeriodicalIF":0.0,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-05DOI: 10.1016/j.nxmate.2024.100439
Samra Imran, Mamoona Khalid
Solar energy has emerged as an effective renewable source of electricity that reduces carbon emissions and global warming. Conventional solar panels comprise silicon wafers and are vastly used on a commercial basis; however, they do have some drawbacks. Silicon is an indirect band gap material (Eg = 1.12 eV), that lowers its overall absorption and affects the efficiency of the solar cells. Increasing the thickness of existing cells can result in better absorption, but this increases manufacturing cost and complexity. Recently, Perovskite materials have proven to be an effective alternative, as they have better light absorption capability, are readily crystallized as a thin film, and have low cost and higher efficiencies compared to the existing solar technology. Organic/inorganic halide perovskite solar cells are declared the game changer as an alternate energy solution in a concise period claiming efficiencies >20 %. This remarkable progress further highlights the possibility of realizing the potential even deeper. In the Perovskite solar cell structure, Electron Transport Layer (ETL) and Hole transport layer (HTL) is also added to avoid recombination of charge, and maximize absorption. In this paper, we implemented a novel solar cell design on SCAPS-1D, having an optimized parameter composition of FTO/TiO2/CH3NH3SnI3/CuI/Au. The simulation results demonstrated an open circuit voltage (Voc) =1.06 V, Jsc= 32.15 mA/cm2, for FF= 80.43 % and PCE= 27.33 %. We also analyzed the effect of absorber layer thickness and temperature on the performance of the proposed design. The optimized design can not only be useful for the development of a cost-effective and efficient solar cell but also has the potential to advance the field of Perovskite solar cells. Furthermore, we present the mathematical modeling of the proposed solar cell on MATLAB Simulink by mapping the characteristics onto the solar array. Through this modeling, we have developed a solar panel design that can give an output power of 130 W.
{"title":"Simulations and performance analysis of CH3NH3SnI3 perovskite solar cell: Modeling thickness and temperature effects using SCAPS-1D","authors":"Samra Imran, Mamoona Khalid","doi":"10.1016/j.nxmate.2024.100439","DOIUrl":"10.1016/j.nxmate.2024.100439","url":null,"abstract":"<div><div>Solar energy has emerged as an effective renewable source of electricity that reduces carbon emissions and global warming. Conventional solar panels comprise silicon wafers and are vastly used on a commercial basis; however, they do have some drawbacks. Silicon is an indirect band gap material (E<sub>g</sub> = 1.12 eV), that lowers its overall absorption and affects the efficiency of the solar cells. Increasing the thickness of existing cells can result in better absorption, but this increases manufacturing cost and complexity. Recently, Perovskite materials have proven to be an effective alternative, as they have better light absorption capability, are readily crystallized as a thin film, and have low cost and higher efficiencies compared to the existing solar technology. Organic/inorganic halide perovskite solar cells are declared the game changer as an alternate energy solution in a concise period claiming efficiencies >20 %. This remarkable progress further highlights the possibility of realizing the potential even deeper. In the Perovskite solar cell structure, Electron Transport Layer (ETL) and Hole transport layer (HTL) is also added to avoid recombination of charge, and maximize absorption. In this paper, we implemented a novel solar cell design on SCAPS-1D, having an optimized parameter composition of FTO/TiO<sub>2</sub>/CH<sub>3</sub>NH<sub>3</sub>SnI<sub>3</sub>/CuI/Au. The simulation results demonstrated an open circuit voltage (V<sub>oc</sub>) =1.06 V, J<sub>sc</sub>= 32.15 mA/cm<sup>2</sup>, for FF= 80.43 % and PCE= 27.33 %. We also analyzed the effect of absorber layer thickness and temperature on the performance of the proposed design. The optimized design can not only be useful for the development of a cost-effective and efficient solar cell but also has the potential to advance the field of Perovskite solar cells. Furthermore, we present the mathematical modeling of the proposed solar cell on MATLAB Simulink by mapping the characteristics onto the solar array. Through this modeling, we have developed a solar panel design that can give an output power of 130 W.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100439"},"PeriodicalIF":0.0,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-05DOI: 10.1016/j.nxmate.2024.100445
K.G. Sagar , P. SampthKumaran
In the composite’s family, the aluminum Metal Matrix Composites (MMC’s) especially Aluminum Beryl ones are the widely used and recognized materials as they possess light weight, high strength, good wear resistance characteristics and used in divers engineering applications. Some of the engineering parts may fail in service prematurely or during extended life situation owing to overcome stress or deficiency in processing condition or excess operating temperature and all these aspects are contributing to lowering the life. The factor responsible for reduction in life span are residual stress, creep, fatigue etc. Among them, creep and fatigue have been addressed in the literature for Aluminum based alloys and composites, but Residual Stress (RS) affecting mechanical properties are less cited especially for Aluminum Beryl Composites and further work needs to be undertaken and discussed.
Hence, this particular work addresses the onset of Residual Stress (RS) measurements done using X-ray diffraction technique in aluminum beryl composites with Beryl content kept at 0, 2, 4 and 6 wt% and subjected to extrusion process and relating this to mechanical strength evaluated using UTM (Universal Testing Machine). By doing this, a good correlation among RS, strength, microstructure and hardness are evolved. The metallurgical analysis has been carried out to obtain the microstructure features as well as the grain size distribution and relating them to other parameters.
The Aluminum Beryl composites in the extruded condition (Al-B-0 EX) have yielded very good results in respect of tensile strength and hardness, finer microstructure and smaller grain size over annealed composites. Among the samples studied, Al-B-6 EX has displayed UTS of 268 Mpa, residual stress level of 190 Mpa, hardness of 158 VHN, good and uniform beryl particles distribution within the matrix having grain size of 30 microns compared to Al-B-0 AN which has shown density 2.88 g/cc, % void content of 0.36, surface roughness of 0.9, UTS of 168 Mpa, residual stress of 85 Mpa, hardness of 119 VHN and grain size of 75 microns.
The reason for such a trend is higher density, lesser void content, higher hardness lower surface roughness, higher compressive stress, finer grain size. The SEM images have provided very good backing up to substantiate the tensile data based on the fractographic study.
{"title":"Effect of residual stress on the mechanical strength in Al Beryl composites subjected to extrusion process","authors":"K.G. Sagar , P. SampthKumaran","doi":"10.1016/j.nxmate.2024.100445","DOIUrl":"10.1016/j.nxmate.2024.100445","url":null,"abstract":"<div><div>In the composite’s family, the aluminum Metal Matrix Composites (MMC’s) especially Aluminum Beryl ones are the widely used and recognized materials as they possess light weight, high strength, good wear resistance characteristics and used in divers engineering applications. Some of the engineering parts may fail in service prematurely or during extended life situation owing to overcome stress or deficiency in processing condition or excess operating temperature and all these aspects are contributing to lowering the life. The factor responsible for reduction in life span are residual stress, creep, fatigue etc. Among them, creep and fatigue have been addressed in the literature for Aluminum based alloys and composites, but Residual Stress (RS) affecting mechanical properties are less cited especially for Aluminum Beryl Composites and further work needs to be undertaken and discussed.</div><div>Hence, this particular work addresses the onset of Residual Stress (RS) measurements done using X-ray diffraction technique in aluminum beryl composites with Beryl content kept at 0, 2, 4 and 6 wt% and subjected to extrusion process and relating this to mechanical strength evaluated using UTM (Universal Testing Machine). By doing this, a good correlation among RS, strength, microstructure and hardness are evolved. The metallurgical analysis has been carried out to obtain the microstructure features as well as the grain size distribution and relating them to other parameters.</div><div>The Aluminum Beryl composites in the extruded condition (Al-B-0 EX) have yielded very good results in respect of tensile strength and hardness, finer microstructure and smaller grain size over annealed composites. Among the samples studied, Al-B-6 EX has displayed UTS of 268 Mpa, residual stress level of 190 Mpa, hardness of 158 VHN, good and uniform beryl particles distribution within the matrix having grain size of 30 microns compared to Al-B-0 AN which has shown density 2.88 g/cc, % void content of 0.36, surface roughness of 0.9, UTS of 168 Mpa, residual stress of 85 Mpa, hardness of 119 VHN and grain size of 75 microns.</div><div>The reason for such a trend is higher density, lesser void content, higher hardness lower surface roughness, higher compressive stress, finer grain size. The SEM images have provided very good backing up to substantiate the tensile data based on the fractographic study.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100445"},"PeriodicalIF":0.0,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-05DOI: 10.1016/j.nxmate.2024.100446
Muhammad Aqil Asyraaf Mohd Mahadi , Irfan Shah , Waheeba Ahmed Al-Amrani , Faiz Bukhari Mohd Suah , Haslizaidi Zakaria , Amran Shafie , Megat Ahmad Kamal Megat Hanafiah
More than eight thousand chemicals, including hazardous dyes affecting human health and aquatic ecosystems, are discharged into the environment by various industries. A novel chitosan-coated oil palm trunk fiber (CSOPT) composite was synthesized using a mixture of imidazolium-based ionic liquid and acetic acid (as solvents) and applied to remove hazardous malachite green (MG) dye from the water-based solutions under batch mode. The CSOPT properties have been examined using spectroscopy and quantitative approaches. The biosorption of MG onto CSOPT was evaluated under several experimental settings. The data indicate that the synthesized CSOPT adsorbent exhibited a stream-like surface and a semicrystalline structure, characterized by a reduced specific area and pore diameter attributed to the presence of chitosan (CS) molecules on the raw oil palm trunk fibers (OPT). Biosorption studies showed that the maximal biosorption capacity of CSOPT towards MG was 1025 mg/g at a contact duration of 20 min, solution pH of 8, and CSOPT weight of 0.01 g. The higher biosorption capacity of CSOPT was attributed to the presence of OPT particles in its structure. The kinetics results of MG biosorption showed that it followed the PSO kinetic model through high values of correlation constants (R2) and small chi-square (χ²) values. The MG biosorption isotherm onto the CSOPT surface exhibited a multilayer stepwise pattern, denoting type L4 isotherm. Desorption of MG using 0.10 M HCl was only 0.78 %, indicating the presence of strong electrostatic attractions, as well as other molecular interactions such as H-bonding, Yoshida H-bonding, n-π, and π-π stacking. These results suggest that CSOPT offers a practical and alternative solution for removing MG from wastewater.
{"title":"Novel chitosan coated oil palm trunk fibers synthesized using ionic liquid for malachite green removal","authors":"Muhammad Aqil Asyraaf Mohd Mahadi , Irfan Shah , Waheeba Ahmed Al-Amrani , Faiz Bukhari Mohd Suah , Haslizaidi Zakaria , Amran Shafie , Megat Ahmad Kamal Megat Hanafiah","doi":"10.1016/j.nxmate.2024.100446","DOIUrl":"10.1016/j.nxmate.2024.100446","url":null,"abstract":"<div><div>More than eight thousand chemicals, including hazardous dyes affecting human health and aquatic ecosystems, are discharged into the environment by various industries. A novel chitosan-coated oil palm trunk fiber (CSOPT) composite was synthesized using a mixture of imidazolium-based ionic liquid and acetic acid (as solvents) and applied to remove hazardous malachite green (MG) dye from the water-based solutions under batch mode. The CSOPT properties have been examined using spectroscopy and quantitative approaches. The biosorption of MG onto CSOPT was evaluated under several experimental settings. The data indicate that the synthesized CSOPT adsorbent exhibited a stream-like surface and a semicrystalline structure, characterized by a reduced specific area and pore diameter attributed to the presence of chitosan (CS) molecules on the raw oil palm trunk fibers (OPT). Biosorption studies showed that the maximal biosorption capacity of CSOPT towards MG was 1025 mg/g at a contact duration of 20 min, solution pH of 8, and CSOPT weight of 0.01 g. The higher biosorption capacity of CSOPT was attributed to the presence of OPT particles in its structure. The kinetics results of MG biosorption showed that it followed the PSO kinetic model through high values of correlation constants (<em>R</em><sup><em>2</em></sup>) and small chi-square (<em>χ²</em>) values. The MG biosorption isotherm onto the CSOPT surface exhibited a multilayer stepwise pattern, denoting type L4 isotherm. Desorption of MG using 0.10 M HCl was only 0.78 %, indicating the presence of strong electrostatic attractions, as well as other molecular interactions such as H-bonding, Yoshida H-bonding, <em>n</em>-π, and π-π stacking. These results suggest that CSOPT offers a practical and alternative solution for removing MG from wastewater.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100446"},"PeriodicalIF":0.0,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Elucidating the characteristics of the Cu-Se, In-Se, and Ga-Se bonds in chalcopyrite-type Cu(In,Ga)Se2-based semiconductors can aid the design and fabrication of highly efficient thin-film photovoltaic devices. In this study, we used extended X-ray absorption fine structure (EXAFS) analyses to evaluate the characteristics of chemical bonds in Cu(In,Ga)Se2 and Cu(In,Ga)S2 powder samples at low temperatures (10–300 K). The temperature dependence of the structural and vibrational disorder (Debye–Waller factor) provides the Einstein temperature of an individual bond in Cu(In,Ga)Se2-based materials. The analyzed Einstein temperature, which is proportional to the Einstein frequency, increased in the order of Cu–Se(S) < In–Se(S) ≤ Ga–Se(S), and the S-containing bond had a higher Einstein temperature than the corresponding Se-containing one. We also analyzed the effect of the Ga/(Ga + In) ratio on the Einstein temperature of each chemical bond. The force constant of the oscillator (i.e., the bond) was determined from the Einstein frequency using the reduced mass of the constituent atoms. The obtained bond properties were found to correlate with the diffusion characteristics of the constituent atoms in CuInSe2-based solar cell materials.
{"title":"Einstein frequency of individual chalcogen bonds in Cu(In,Ga)Se2 and Cu(In,Ga)S2: Indicator of diffusion property of Cu, In, and Ga atoms","authors":"Kosuke Beppu , Fumiaki Amano , Seiji Yamazoe , Takahiro Wada","doi":"10.1016/j.nxmate.2024.100443","DOIUrl":"10.1016/j.nxmate.2024.100443","url":null,"abstract":"<div><div>Elucidating the characteristics of the Cu-Se, In-Se, and Ga-Se bonds in chalcopyrite-type Cu(In,Ga)Se<sub>2</sub>-based semiconductors can aid the design and fabrication of highly efficient thin-film photovoltaic devices. In this study, we used extended X-ray absorption fine structure (EXAFS) analyses to evaluate the characteristics of chemical bonds in Cu(In,Ga)Se<sub>2</sub> and Cu(In,Ga)S<sub>2</sub> powder samples at low temperatures (10–300 K). The temperature dependence of the structural and vibrational disorder (Debye–Waller factor) provides the Einstein temperature of an individual bond in Cu(In,Ga)Se<sub>2</sub>-based materials. The analyzed Einstein temperature, which is proportional to the Einstein frequency, increased in the order of Cu–Se(S) < In–Se(S) ≤ Ga–Se(S), and the S-containing bond had a higher Einstein temperature than the corresponding Se-containing one. We also analyzed the effect of the Ga/(Ga + In) ratio on the Einstein temperature of each chemical bond. The force constant of the oscillator (i.e., the bond) was determined from the Einstein frequency using the reduced mass of the constituent atoms. The obtained bond properties were found to correlate with the diffusion characteristics of the constituent atoms in CuInSe<sub>2</sub>-based solar cell materials.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100443"},"PeriodicalIF":0.0,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-03DOI: 10.1016/j.nxmate.2024.100444
Bruna Andressa Bregadiolli , Glauco Meireles Mascarenhas Morandi Lustosa , João Vitor Paulin , Waldir Antonio Bizzo , Lauro Tatsuo Kubota , Shuguang Deng , Talita Mazon
Biochar materials have been applied in energy storage due to their unique properties, such as high storage of ions, high conductivity, chemical stability and ease of production. Combining it with the high specific capacitance could be a promising strategy to develop devices and improve the properties. Through a hydrothermal technique the biochar powders were synthesized from sugarcane biomass. An acid pretreatment was carried out before and after the graphitization process aiming to obtain carbon materials with high surface area and porosity. The morphological characterization reveals powders with pores of submicrometer diameter. For the pure biochar it was determined a superficial area of 477.66 m2.g−1 with a median pore size of 42.92 Å and a pore volume of 0.21 cm3.g−1. A carbon-based paste was then prepared to deposit on nickel foam and obtain the electrodes. In a 3-electrode system characterization, biochar has showed higher specific capacitance than the metal oxide composites due to higher surface area and higher medium pore diameter. It was calculated a resistance of 2.7 Ω, a capacitance of 446 mF.g−1, a power density of 46.2 W.kg−1 and an energy density of 1.8 W.h.kg−1. These results indicate the potential use of biochar-based electrodes with high electrical conductivity and improved surface area to obtain higher capacitance properties for development of advanced devices.
{"title":"Synthesis of biochar and its metal oxide composites and application on next sustainable electrodes for energy storage devices","authors":"Bruna Andressa Bregadiolli , Glauco Meireles Mascarenhas Morandi Lustosa , João Vitor Paulin , Waldir Antonio Bizzo , Lauro Tatsuo Kubota , Shuguang Deng , Talita Mazon","doi":"10.1016/j.nxmate.2024.100444","DOIUrl":"10.1016/j.nxmate.2024.100444","url":null,"abstract":"<div><div>Biochar materials have been applied in energy storage due to their unique properties, such as high storage of ions, high conductivity, chemical stability and ease of production. Combining it with the high specific capacitance could be a promising strategy to develop devices and improve the properties. Through a hydrothermal technique the biochar powders were synthesized from sugarcane biomass. An acid pretreatment was carried out before and after the graphitization process aiming to obtain carbon materials with high surface area and porosity. The morphological characterization reveals powders with pores of submicrometer diameter. For the pure biochar it was determined a superficial area of 477.66 m<sup>2</sup>.g<sup>−1</sup> with a median pore size of 42.92 Å and a pore volume of 0.21 cm<sup>3</sup>.g<sup>−1</sup>. A carbon-based paste was then prepared to deposit on nickel foam and obtain the electrodes. In a 3-electrode system characterization, biochar has showed higher specific capacitance than the metal oxide composites due to higher surface area and higher medium pore diameter. It was calculated a resistance of 2.7 Ω, a capacitance of 446 mF.g<sup>−1</sup>, a power density of 46.2 W.kg<sup>−1</sup> and an energy density of 1.8 W.h.kg<sup>−1</sup>. These results indicate the potential use of biochar-based electrodes with high electrical conductivity and improved surface area to obtain higher capacitance properties for development of advanced devices.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100444"},"PeriodicalIF":0.0,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142759050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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