Pub Date : 2024-10-28DOI: 10.1016/j.mtsust.2024.101028
Oladepo Fasakin , Kabir O. Oyedotun , Abdulmajid A. Mirghni , Ndeye F. Sylla , Badr A. Mahmoud , Ncholu Manyala
Biomass waste of cocoa pod husks is adopted as starting material to synthesize Activated carbon (ACC) using a tube furnace via KOH activation with temperature ranging from 500 °C to 800 °C. The activated carbon prepared at 600 °C (ACC 600 °C) shows improved qualities than the other prepared samples, according to the physico-chemical analyses. A sponge-like morphology, amorphous structure, and microporous and mesoporous carbon are observed in the synthesized material. Trasatti approach is adopted to verify the storage mechanism of the activated carbon material (ACC 600 °C) with the percentage contribution of capacitive and diffusion-controlled effect as 92.4732% and 7.5268% for positive electrode while the negative electrode possesses 75.565% and 24.435% at scan rate of 50 mVs−1. A symmetric device is fabricated from the ACC 600 °C, which gives a maximum specific energy (S.E.) of 19 Wh kg−1 with a corresponding specific power (S.P.) of 453 W kg−1 at a specific current of 0.5 A g−1 in 2.5 M KNO3 solution. The coulombic efficiency of the device is 99.6% after 10000 cycles with 72% capacitance retention. The obtained results suggest that the activated carbon derived from cocoa pod husks could be used as a promising material for supercapacitor's application.
以可可荚壳生物质废料为起始材料，使用管式炉通过 KOH 活化法合成活性炭（ACC），温度范围为 500 °C 至 800 °C。根据物理化学分析，在 600 °C 下制备的活性炭（ACC 600 °C）比其他制备的样品质量更好。合成材料具有海绵状形貌、无定形结构以及微孔和介孔碳。在 50 mVs-1 的扫描速率下，正极的电容效应和扩散控制效应分别占 92.4732% 和 7.5268%，而负极则分别占 75.565% 和 24.435%。在 2.5 M KNO3 溶液中，当比电流为 0.5 A g-1 时，ACC 600 °C 制成的对称装置的最大比能量（S.E.）为 19 Wh kg-1，相应的比功率（S.P.）为 453 W kg-1。经过 10000 次循环后，该装置的库仑效率为 99.6%，电容保持率为 72%。这些结果表明，从可可荚壳中提取的活性炭可以作为一种很有前途的超级电容器应用材料。
{"title":"Synthesis and characterization of activated carbon derived from agricultural waste (cocoa pod husks) as potential electrode for symmetric supercapacitor","authors":"Oladepo Fasakin , Kabir O. Oyedotun , Abdulmajid A. Mirghni , Ndeye F. Sylla , Badr A. Mahmoud , Ncholu Manyala","doi":"10.1016/j.mtsust.2024.101028","DOIUrl":"10.1016/j.mtsust.2024.101028","url":null,"abstract":"<div><div>Biomass waste of cocoa pod husks is adopted as starting material to synthesize Activated carbon (ACC) using a tube furnace via KOH activation with temperature ranging from 500 °C to 800 °C. The activated carbon prepared at 600 °C (ACC 600 °C) shows improved qualities than the other prepared samples, according to the physico-chemical analyses. A sponge-like morphology, amorphous structure, and microporous and mesoporous carbon are observed in the synthesized material. Trasatti approach is adopted to verify the storage mechanism of the activated carbon material (ACC 600 °C) with the percentage contribution of capacitive and diffusion-controlled effect as 92.4732% and 7.5268% for positive electrode while the negative electrode possesses 75.565% and 24.435% at scan rate of 50 mVs<sup>−1</sup>. A symmetric device is fabricated from the ACC 600 °C, which gives a maximum specific energy (S.E.) of 19 Wh kg<sup>−1</sup> with a corresponding specific power (S.P.) of 453 W kg<sup>−1</sup> at a specific current of 0.5 A g<sup>−1</sup> in 2.5 M KNO<sub>3</sub> solution. The coulombic efficiency of the device is 99.6% after 10000 cycles with 72% capacitance retention. The obtained results suggest that the activated carbon derived from cocoa pod husks could be used as a promising material for supercapacitor's application.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101028"},"PeriodicalIF":7.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.mtsust.2024.101034
Alain Tèebwaoga Sina , Jamal Ait Brahim , Bilal Ben Ali , Brahim Achiou , Nils Haneklaus , Redouane Beniazza
The global demand of gypsum resources is in continuous growth in construction sector. A large share of commercially available gypsum is closed by gypsum by-products including the flue gas desulfurization gypsum (FGDG), generated from thermal power plants. The production of FGDG is expected to be reduced in the upcoming years following the energy transition from fossil to green energy resources. To meet the increasing demand in the cement industry, other gypsum by-products could be introduced in the market including phosphogypsum (PG), produced in large volume in the fertilizer industry. This review emphasizes on the status and market of gypsum resources in the last 20 years, especially the gypsum by-products resources. The performance of these gypsum resources in cement was evaluated, highlighting the influence of impurities, the technical and the economic feasibility of large-scale use of gypsum by-products in cement as a substitute of FGDG and natural gypsum.
{"title":"Securing gypsum demand in cement industry by gypsum by-products: Current challenges and prospects","authors":"Alain Tèebwaoga Sina , Jamal Ait Brahim , Bilal Ben Ali , Brahim Achiou , Nils Haneklaus , Redouane Beniazza","doi":"10.1016/j.mtsust.2024.101034","DOIUrl":"10.1016/j.mtsust.2024.101034","url":null,"abstract":"<div><div>The global demand of gypsum resources is in continuous growth in construction sector. A large share of commercially available gypsum is closed by gypsum by-products including the flue gas desulfurization gypsum (FGDG), generated from thermal power plants. The production of FGDG is expected to be reduced in the upcoming years following the energy transition from fossil to green energy resources. To meet the increasing demand in the cement industry, other gypsum by-products could be introduced in the market including phosphogypsum (PG), produced in large volume in the fertilizer industry. This review emphasizes on the status and market of gypsum resources in the last 20 years, especially the gypsum by-products resources. The performance of these gypsum resources in cement was evaluated, highlighting the influence of impurities, the technical and the economic feasibility of large-scale use of gypsum by-products in cement as a substitute of FGDG and natural gypsum.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101034"},"PeriodicalIF":7.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.mtsust.2024.101027
Sining Liu , Xin Yan , Pengyu Li , Xinru Tian , Sinan Li , Fei Teng , Shao-hua Luo
Li-rich Co-free Mn-based cathode materials have attracted considerable attention in the development of lithium-ion batteries (LIBs) due to their impressive theoretical capacity and cost-effectiveness. Nevertheless, the inherent shortcomings in cycling stability and rate capability hinder their widespread application. Herein, Na-doped Li1.2-xNaxMn0.6Ni0.2O2 (x = 0, 0.01, 0.03, 0.05, 0.08, 0.10) is synthesized using Na2CO3 as the source of Na. Density functional theory (DFT) calculations reveal that the presence of Na+ introduction enlarges the between-layer spacing of Li1.2Mn0.6Ni0.2O2, reduces the band gap width, reduces the cation mixing phenomenon, and increases the Li+ diffusion rate and electronic conductivity. Experimental electrochemical assessments demonstrate that the cathode material with a Na doping level of 0.03 exhibits remarkable performance: it achieves a discharge specific capacity of 204 mAh·g−1 at 0.1C and retains 87.4% of its capacity after 100 cycles. These findings underscore the efficacy of Na doping in enhancing the electrochemical properties of Li-rich Mn-based cathode materials, thereby advancing their potential for practical application in LIBs.
富锂无钴锰基正极材料因其出色的理论容量和成本效益而在锂离子电池（LIB）的开发中备受关注。然而，循环稳定性和速率能力方面的固有缺陷阻碍了它们的广泛应用。本文以 Na2CO3 为 Na 源，合成了掺杂 Na 的 Li1.2-xNaxMn0.6Ni0.2O2（x = 0、0.01、0.03、0.05、0.08、0.10）。密度泛函理论（DFT）计算显示，Na+ 的引入扩大了 Li1.2Mn0.6Ni0.2O2 的层间间隔，减小了带隙宽度，减少了阳离子混合现象，并提高了 Li+ 的扩散速率和电子电导率。实验电化学评估表明，Na 掺杂水平为 0.03 的阴极材料表现出卓越的性能：它在 0.1C 时的放电比容量达到 204 mAh-g-1，并在 100 次循环后保持了 87.4% 的容量。这些发现强调了掺杂 Na 能有效增强富锂锰基阴极材料的电化学性能，从而提高了它们在锂电子电池中的实际应用潜力。
{"title":"Structural and enhanced electrochemical performance of Co-free lithium-rich layered manganese-based Li1.2Mn0.6Ni0.2O2 cathodes via Na-doping at Li site for lithium-ion batteries","authors":"Sining Liu , Xin Yan , Pengyu Li , Xinru Tian , Sinan Li , Fei Teng , Shao-hua Luo","doi":"10.1016/j.mtsust.2024.101027","DOIUrl":"10.1016/j.mtsust.2024.101027","url":null,"abstract":"<div><div>Li-rich Co-free Mn-based cathode materials have attracted considerable attention in the development of lithium-ion batteries (LIBs) due to their impressive theoretical capacity and cost-effectiveness. Nevertheless, the inherent shortcomings in cycling stability and rate capability hinder their widespread application. Herein, Na-doped Li<sub>1.2-x</sub>Na<sub>x</sub>Mn<sub>0.6</sub>Ni<sub>0.2</sub>O<sub>2</sub> (x = 0, 0.01, 0.03, 0.05, 0.08, 0.10) is synthesized using Na<sub>2</sub>CO<sub>3</sub> as the source of Na. Density functional theory (DFT) calculations reveal that the presence of Na<sup>+</sup> introduction enlarges the between-layer spacing of Li<sub>1.2</sub>Mn<sub>0.6</sub>Ni<sub>0.2</sub>O<sub>2</sub>, reduces the band gap width, reduces the cation mixing phenomenon, and increases the Li<sup>+</sup> diffusion rate and electronic conductivity. Experimental electrochemical assessments demonstrate that the cathode material with a Na doping level of 0.03 exhibits remarkable performance: it achieves a discharge specific capacity of 204 mAh·g<sup>−1</sup> at 0.1C and retains 87.4% of its capacity after 100 cycles. These findings underscore the efficacy of Na doping in enhancing the electrochemical properties of Li-rich Mn-based cathode materials, thereby advancing their potential for practical application in LIBs.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101027"},"PeriodicalIF":7.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142577836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Over the past few decades, the soaring environmental pollution due to hastened industrialization and pernicious agricultural processes has become a substantial obstacle. The existence of detrimental contaminants like nuclear wastes, heavy metals, pesticides, hydrocarbons, oils, and dyes has been withering the environment and human health. In this context, microbial bioremediation has established itself as the most comprehensive biotechnological process for environmental restoration. The application of microbial communities in bioremediation is gaining momentum as an astounding, environmentally sound, and economically efficient means to mitigate the harmful effects of toxic pollutants. Microorganisms serve as invaluable resources for environmental restoration and remediation of polluted soil, showcasing their presence across a wide range of environmental conditions. Precisely microorganisms are distributed all over the biosphere due to their diverse metabolic activity and can easily grow in a wide range of environmental conditions which in an environment often create a variety of enzymes that can eliminate hazardous contaminants by using them as a substrate for growth. To enhance the metabolic potential of microbes, currently, different methods and strategies like biostimulation, bioaugmentation, bioventing, etc. are applied. The present review focuses on microbial diversity in bioremediation, different techniques applied, and the bioremediation of different environmental pollutants. It additionally attempted to highlight the monitoring of the bioremediation processes and their sustainability.
{"title":"Potential microbes in bioremediation: A review","authors":"Kuheli Bhowmick , Debasree Roy , Dipak Rana , Adrija Ghosh , Sourav Sadhukhan , Mukut Chakraborty , Dipankar Chattopadhyay , Tapas Kumar Ghosh","doi":"10.1016/j.mtsust.2024.101032","DOIUrl":"10.1016/j.mtsust.2024.101032","url":null,"abstract":"<div><div>Over the past few decades, the soaring environmental pollution due to hastened industrialization and pernicious agricultural processes has become a substantial obstacle. The existence of detrimental contaminants like nuclear wastes, heavy metals, pesticides, hydrocarbons, oils, and dyes has been withering the environment and human health. In this context, microbial bioremediation has established itself as the most comprehensive biotechnological process for environmental restoration. The application of microbial communities in bioremediation is gaining momentum as an astounding, environmentally sound, and economically efficient means to mitigate the harmful effects of toxic pollutants. Microorganisms serve as invaluable resources for environmental restoration and remediation of polluted soil, showcasing their presence across a wide range of environmental conditions. Precisely microorganisms are distributed all over the biosphere due to their diverse metabolic activity and can easily grow in a wide range of environmental conditions which in an environment often create a variety of enzymes that can eliminate hazardous contaminants by using them as a substrate for growth. To enhance the metabolic potential of microbes, currently, different methods and strategies like biostimulation, bioaugmentation, bioventing, etc. are applied. The present review focuses on microbial diversity in bioremediation, different techniques applied, and the bioremediation of different environmental pollutants. It additionally attempted to highlight the monitoring of the bioremediation processes and their sustainability.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101032"},"PeriodicalIF":7.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142577834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.mtsust.2024.101033
Guilu Qin , Yifan Liu , Ruhumuriza Jonathan , Baoshan Wu , Xian Jian
TiO2 semiconductor has the disadvantages of energy bandwidth, low photo-quantum efficiency, and electron-hole pair easy recombination, which makes TiO2 semiconductor photocatalytic materials cannot be widely used efficiently. Here, a simple and low-cost method is used to prepare TiO2/C/Cu hybrid by in-situ carbon reduction by chemical vapor deposition. During high-temperature calcination, an amorphous carbon is formed on the surface of anatase TiO2, and CuO is reduced by in-situ carbon to obtain Cu. Partial Cu-doping into TiO2 introduces defects, and in-situ Cu and C loads act as electron traps to reduce photogenerated electron/hole recombination. Compared with the original TiO2, the TiO2/C/Cu hybrids have a narrow band gap (2.77 eV) and abundant defect active sites and have excellent photocatalytic activity to improve the degradation of formaldehyde (HCHO) and methyl orange (MO) under visible light. In addition, after 4 cycles, the degradation of HCHO and MO still maintained excellent stability. This innovation has many potential applications in the future, including air purification and industry.
{"title":"TiO2/C/Cu hybrids by in-situ carbon reduction for a green photocatalytic agent","authors":"Guilu Qin , Yifan Liu , Ruhumuriza Jonathan , Baoshan Wu , Xian Jian","doi":"10.1016/j.mtsust.2024.101033","DOIUrl":"10.1016/j.mtsust.2024.101033","url":null,"abstract":"<div><div>TiO<sub>2</sub> semiconductor has the disadvantages of energy bandwidth, low photo-quantum efficiency, and electron-hole pair easy recombination, which makes TiO<sub>2</sub> semiconductor photocatalytic materials cannot be widely used efficiently. Here, a simple and low-cost method is used to prepare TiO<sub>2</sub>/C/Cu hybrid by in-situ carbon reduction by chemical vapor deposition. During high-temperature calcination, an amorphous carbon is formed on the surface of anatase TiO<sub>2</sub>, and CuO is reduced by in-situ carbon to obtain Cu. Partial Cu-doping into TiO<sub>2</sub> introduces defects, and in-situ Cu and C loads act as electron traps to reduce photogenerated electron/hole recombination. Compared with the original TiO<sub>2</sub>, the TiO<sub>2</sub>/C/Cu hybrids have a narrow band gap (2.77 eV) and abundant defect active sites and have excellent photocatalytic activity to improve the degradation of formaldehyde (HCHO) and methyl orange (MO) under visible light. In addition, after 4 cycles, the degradation of HCHO and MO still maintained excellent stability. This innovation has many potential applications in the future, including air purification and industry.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101033"},"PeriodicalIF":7.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.mtsust.2024.101035
Reji Kumar Rajamony , A.K. Pandey , A.G.N. Sofiah , Johnny Koh Siaw Paw , Govindasami Periyasami , K. Chopra , Subramaniyan Chinnasamy , Rizwan A. Farade
Photovoltaic thermal (PVT) systems represent an advanced evolution of traditional photovoltaic (PV) modules designed to generate electrical and thermal energy simultaneously. However, achieving optimal and commercially viable performance from these systems remains challenging. To overcome this issue, in this research, multiwalled carbon nanotube (MWCNT) enhanced phase change materials (PCMs) integrated with PVT system to enhance electrical and thermal performance has been studied. An experimental investigation with three different configurations, PVT, PCM integrated PVT (PVTPCM), and MWCNT enhanced PCM integrated PVT (PVTNePCM) systems, was carried out under varying solar radiations and a water flow rate of 0.013–0.016 kg/s compared to conventional PV system. A two-step technique was employed to formulate the nanocomposites, and the energy performance of both PV and PVT systems assessed experimentally. The performance of PVTPCM and PVTNePCM systems was evaluated using the TRNSYS simulation technique. The formulated nanocomposite exhibited a 71.43% enhancement in thermal conductivity, a significant reduction in transmittance up to 92% and remained chemically and thermally stable. Integration of NePCM in the PVT system resulted in a notable decrease in panel temperature and a 25.03% increase in electrical efficiency compared to the conventional PV system. The highest performance ratio and overall efficiency for PVTNePCM were 0.55 and 81.62%, respectively, at a flow rate of 0.013 kg/s. The energy payback periods of PVTNePCM, PVTPCM, and PVT setup were 4.7, 4.8 and 5.6 years, respectively. Additionally, a significant improvement in thermal efficiency were observed for PVTPCM and PVTNePCM systems compared to water-based PVT systems, due to the energy stored in the thermal energy storage material.
{"title":"Evaluating the energy and economic performance of hybrid photovoltaic thermal system integrated with multiwalled carbon nanotubes enhanced phase change material","authors":"Reji Kumar Rajamony , A.K. Pandey , A.G.N. Sofiah , Johnny Koh Siaw Paw , Govindasami Periyasami , K. Chopra , Subramaniyan Chinnasamy , Rizwan A. Farade","doi":"10.1016/j.mtsust.2024.101035","DOIUrl":"10.1016/j.mtsust.2024.101035","url":null,"abstract":"<div><div>Photovoltaic thermal (PVT) systems represent an advanced evolution of traditional photovoltaic (PV) modules designed to generate electrical and thermal energy simultaneously. However, achieving optimal and commercially viable performance from these systems remains challenging. To overcome this issue, in this research, multiwalled carbon nanotube (MWCNT) enhanced phase change materials (PCMs) integrated with PVT system to enhance electrical and thermal performance has been studied. An experimental investigation with three different configurations, PVT, PCM integrated PVT (PVT<sub>PCM</sub>), and MWCNT enhanced PCM integrated PVT (PVT<sub>NePCM</sub>) systems, was carried out under varying solar radiations and a water flow rate of 0.013–0.016 kg/s compared to conventional PV system. A two-step technique was employed to formulate the nanocomposites, and the energy performance of both PV and PVT systems assessed experimentally. The performance of PVT<sub>PCM</sub> and PVT<sub>NePCM</sub> systems was evaluated using the TRNSYS simulation technique. The formulated nanocomposite exhibited a 71.43% enhancement in thermal conductivity, a significant reduction in transmittance up to 92% and remained chemically and thermally stable. Integration of NePCM in the PVT system resulted in a notable decrease in panel temperature and a 25.03% increase in electrical efficiency compared to the conventional PV system. The highest performance ratio and overall efficiency for PVT<sub>NePCM</sub> were 0.55 and 81.62%, respectively, at a flow rate of 0.013 kg/s. The energy payback periods of PVT<sub>NePCM</sub>, PVT<sub>PCM</sub>, and PVT setup were 4.7, 4.8 and 5.6 years, respectively. Additionally, a significant improvement in thermal efficiency were observed for PVT<sub>PCM</sub> and PVT<sub>NePCM</sub> systems compared to water-based PVT systems, due to the energy stored in the thermal energy storage material.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101035"},"PeriodicalIF":7.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.mtsust.2024.101022
Eman A. Alghamdi , Ibtisam S. Almalki 1 , Refka Sai , Masfer H. Alkahtani , Ghazal S. Yafi , Yahya A. Alzahrani , Sultan M. Alenzi , Abdulaziz Aljuwayr , Abdurhman Aldukhail l , Khalid E. Alzahrani , Fatimah S. Alfaifi , Hayat S. Althobaiti , Wadha Khalaf Alenazi , Anwar Q. Alanazi , Masaud Almalki
Perovskite solar cells (PSCs) have made significant strides in power conversion efficiency (PCE), but their commercialization remains limited by stability issues. Additionally, the high cost of electrodes like gold necessitates the exploration of more affordable alternatives such as carbon (graphene). In this study, we present an approach that combines material dimensionality control and interfacial passivation using post-device treatment with phenethylammonium iodide (PEAI), an organic halide salt, to enhance the efficiency of carbon-based PSCs. Effective defect passivation is key to further improving the PCE and open-circuit voltage (VOC) of PSCs. Our results show that PEAI successfully passivates defects on the perovskite surface, significantly reducing non-radiative recombination. As a result, we achieved carbon-based PSCs with an impressive efficiency of 19.3%, demonstrating excellent stability under maximum power point tracking (MPPT) for over 900 h.
{"title":"Enhancing efficiency through surface passivation of carbon-based perovskite solar cells","authors":"Eman A. Alghamdi , Ibtisam S. Almalki 1 , Refka Sai , Masfer H. Alkahtani , Ghazal S. Yafi , Yahya A. Alzahrani , Sultan M. Alenzi , Abdulaziz Aljuwayr , Abdurhman Aldukhail l , Khalid E. Alzahrani , Fatimah S. Alfaifi , Hayat S. Althobaiti , Wadha Khalaf Alenazi , Anwar Q. Alanazi , Masaud Almalki","doi":"10.1016/j.mtsust.2024.101022","DOIUrl":"10.1016/j.mtsust.2024.101022","url":null,"abstract":"<div><div>Perovskite solar cells (PSCs) have made significant strides in power conversion efficiency (PCE), but their commercialization remains limited by stability issues. Additionally, the high cost of electrodes like gold necessitates the exploration of more affordable alternatives such as carbon (graphene). In this study, we present an approach that combines material dimensionality control and interfacial passivation using post-device treatment with phenethylammonium iodide (PEAI), an organic halide salt, to enhance the efficiency of carbon-based PSCs. Effective defect passivation is key to further improving the PCE and open-circuit voltage (<em>V</em><sub><em>OC</em></sub>) of PSCs. Our results show that PEAI successfully passivates defects on the perovskite surface, significantly reducing non-radiative recombination. As a result, we achieved carbon-based PSCs with an impressive efficiency of 19.3%, demonstrating excellent stability under maximum power point tracking (MPPT) for over 900 h.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101022"},"PeriodicalIF":7.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-26DOI: 10.1016/j.mtsust.2024.101017
Akhila Amasegowda , Sneha Yadav , Ragesh Nath R , Udaya Kumar A. H , Sneha Narayan Kulkarni , Harikaranahalli Puttaiah Shivaraju , N.K. Lokanath
Employing a Step-scheme (S-scheme) configuration combined with a cocatalyst offers an effective approach to boost the photocatalytic efficiency of nano-heterostructures. In this study, Ag/AgO nanoparticles were integrated into a 2D/2D heterojunction (g-C3N4/Ni3V2O8) for the photocatalytic degradation of amoxicillin and ciprofloxacin under visible light exposure. Various comprehensive investigative techniques were utilized to verify the composition, formation, and band structure of the g-C3N4/Ni3V2O8–Ag/AgO heterostructure. The embedded Ag/AgO nanoparticles play a dual role: capturing carriers of charge and encouraging electron-hole separation, thus creating a heterojunction of the p-n S-scheme that improves the electrons and holes redox potential for surface reactions. The 2D/2D morphology enables substantial interfacial contact, while Ag/AgO nanoparticles act as cocatalysts, improving electron extraction, affecting product selectivity, and boosting catalytic activity. The optimized g-C3N4/Ni3V2O8–Ag/AgO composite exhibits significant photocatalytic degradation of ciprofloxacin (CIP) and amoxicillin (AMX) under the influence of visible light, reaching elimination rates of 58.8% and 62.1% within 270 min, respectively. Additionally, •O2⁻ and h⁺ are the primary active species, with •O2⁻ leading the photocatalytic elimination of CIP and AMX. This study highlights a potential strategy to developing photocatalysts with a high elimination efficiency of antibiotics by harnessing the enhanced reducing and oxidizing capabilities of S-scheme heterojunctions through meticulous structural configuration.
{"title":"Synergistic visible-light photocatalytic degradation of amoxicillin and ciprofloxacin using Ag/AgO-integrated 2D/2D g-C3N4/Ni3V2O8 S-scheme heterostructure","authors":"Akhila Amasegowda , Sneha Yadav , Ragesh Nath R , Udaya Kumar A. H , Sneha Narayan Kulkarni , Harikaranahalli Puttaiah Shivaraju , N.K. Lokanath","doi":"10.1016/j.mtsust.2024.101017","DOIUrl":"10.1016/j.mtsust.2024.101017","url":null,"abstract":"<div><div>Employing a Step-scheme (S-scheme) configuration combined with a cocatalyst offers an effective approach to boost the photocatalytic efficiency of nano-heterostructures. In this study, Ag/AgO nanoparticles were integrated into a 2D/2D heterojunction (g-C<sub>3</sub>N<sub>4</sub>/Ni<sub>3</sub>V<sub>2</sub>O<sub>8</sub>) for the photocatalytic degradation of amoxicillin and ciprofloxacin under visible light exposure. Various comprehensive investigative techniques were utilized to verify the composition, formation, and band structure of the g-C<sub>3</sub>N<sub>4</sub>/Ni<sub>3</sub>V<sub>2</sub>O<sub>8</sub>–Ag/AgO heterostructure. The embedded Ag/AgO nanoparticles play a dual role: capturing carriers of charge and encouraging electron-hole separation, thus creating a heterojunction of the p-n S-scheme that improves the electrons and holes redox potential for surface reactions. The 2D/2D morphology enables substantial interfacial contact, while Ag/AgO nanoparticles act as cocatalysts, improving electron extraction, affecting product selectivity, and boosting catalytic activity. The optimized g-C<sub>3</sub>N<sub>4</sub>/Ni<sub>3</sub>V<sub>2</sub>O<sub>8</sub>–Ag/AgO composite exhibits significant photocatalytic degradation of ciprofloxacin (CIP) and amoxicillin (AMX) under the influence of visible light, reaching elimination rates of 58.8% and 62.1% within 270 min, respectively. Additionally, •O<sub>2</sub>⁻ and h⁺ are the primary active species, with •O<sub>2</sub>⁻ leading the photocatalytic elimination of CIP and AMX. This study highlights a potential strategy to developing photocatalysts with a high elimination efficiency of antibiotics by harnessing the enhanced reducing and oxidizing capabilities of S-scheme heterojunctions through meticulous structural configuration.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101017"},"PeriodicalIF":7.1,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This review evaluates the application of nitrogen-doped carbon (NDC) catalysts for mitigating nitrogen oxides (NOx) emissions through selective catalytic reduction (SCR) using ammonia (NH3). A key focus is exploring how the unique nitrogen functionalities of NDCs, such as pyridinic and graphitic nitrogen, enhance catalytic performance compared to traditional catalysts, providing deeper insight into their electronic structure and adsorption properties. This review emphasizes the advantages of NDC catalysts in stabilizing SCR reactions under demanding conditions and highlights recent advancements, such as improved synthesis techniques and the incorporation of transition metals to increase activity. Additionally, the review highlights breakthroughs in SCR technology, including the synergistic effects of metal incorporation into NDC structures and innovations in overcoming catalyst deactivation. Fundamental mechanisms of NOx reduction are discussed, with an emphasis on the standard and fast SCR pathways and the interplay of Langmuir-Hinshelwood (L-H) and Eley-Rideal (E-R) mechanisms. The impact of synthesis methodologies, including templating and pyrolysis, on catalyst properties is also analyzed. Key performance factors, such as temperature and reactant concentrations, are examined, alongside strategies to enhance SCR performance by incorporating transition metals and ceria. Challenges like catalyst deactivation and stability are addressed, with potential solutions proposed. Finally, challenges like catalyst deactivation and stability are addressed, with proposed solutions, and future trends in NDC catalyst development to meet evolving emission regulations are outlined.
{"title":"A review of NH3-SCR using nitrogen-doped carbon catalysts for NOx emission control","authors":"Sahar Elkaee , Lalehvash Moghaddam , Behnaz Alinaghipour","doi":"10.1016/j.mtsust.2024.101016","DOIUrl":"10.1016/j.mtsust.2024.101016","url":null,"abstract":"<div><div>This review evaluates the application of nitrogen-doped carbon (NDC) catalysts for mitigating nitrogen oxides (NO<sub>x</sub>) emissions through selective catalytic reduction (SCR) using ammonia (NH<sub>3</sub>). A key focus is exploring how the unique nitrogen functionalities of NDCs, such as pyridinic and graphitic nitrogen, enhance catalytic performance compared to traditional catalysts, providing deeper insight into their electronic structure and adsorption properties. This review emphasizes the advantages of NDC catalysts in stabilizing SCR reactions under demanding conditions and highlights recent advancements, such as improved synthesis techniques and the incorporation of transition metals to increase activity. Additionally, the review highlights breakthroughs in SCR technology, including the synergistic effects of metal incorporation into NDC structures and innovations in overcoming catalyst deactivation. Fundamental mechanisms of NO<sub>x</sub> reduction are discussed, with an emphasis on the standard and fast SCR pathways and the interplay of Langmuir-Hinshelwood (L-H) and Eley-Rideal (E-R) mechanisms. The impact of synthesis methodologies, including templating and pyrolysis, on catalyst properties is also analyzed. Key performance factors, such as temperature and reactant concentrations, are examined, alongside strategies to enhance SCR performance by incorporating transition metals and ceria. Challenges like catalyst deactivation and stability are addressed, with potential solutions proposed. Finally, challenges like catalyst deactivation and stability are addressed, with proposed solutions, and future trends in NDC catalyst development to meet evolving emission regulations are outlined.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101016"},"PeriodicalIF":7.1,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-22DOI: 10.1016/j.mtsust.2024.101018
Abderrazzak Boudouma, Omar Ait Layachi, Hala Hrir, Meryem Nini, yousra Fariat, Imane Battiwa, Asmaa Moujib, Mohamed Nohair, Elmati Khoumri
Cu2ZnSnS4(CZTS) kesterite stands out for its high absorption coefficient and direct optical bandgap, making it a promising absorber material for thin-film photovoltaic cells, combining high efficiency and low cost. CZTSSe-based solar cells currently achieve conversion efficiencies of 15.1%. With more than 3700 publications since 1988, mainly focusing on fabricating CZTS thin films by various techniques, this study looks more specifically at the synthesis of CZTS by electrodeposition. This method recently achieved an efficiency of 8.7%. This approach stands out for its ability to deposit composite metal alloys on large surfaces with controlled thickness. The study explores the impact of synthesis parameters on the physical, chemical, and morphological properties of CZTS films and their influence on solar cell efficiency. Finally, current challenges and prospects are discussed, opening perspectives for advances in synthesizing and applying CZTS thin films for photovoltaic technologies.
{"title":"Electrodeposition synthesis of Cu2ZnSnS4(CZTS) thin films as a promising material for photovoltaic cells: Fundamentals, methods, and future prospects - A comprehensive review","authors":"Abderrazzak Boudouma, Omar Ait Layachi, Hala Hrir, Meryem Nini, yousra Fariat, Imane Battiwa, Asmaa Moujib, Mohamed Nohair, Elmati Khoumri","doi":"10.1016/j.mtsust.2024.101018","DOIUrl":"10.1016/j.mtsust.2024.101018","url":null,"abstract":"<div><div>Cu<sub>2</sub>ZnSnS<sub>4</sub>(CZTS) kesterite stands out for its high absorption coefficient and direct optical bandgap, making it a promising absorber material for thin-film photovoltaic cells, combining high efficiency and low cost. CZTSSe-based solar cells currently achieve conversion efficiencies of 15.1%. With more than 3700 publications since 1988, mainly focusing on fabricating CZTS thin films by various techniques, this study looks more specifically at the synthesis of CZTS by electrodeposition. This method recently achieved an efficiency of 8.7%. This approach stands out for its ability to deposit composite metal alloys on large surfaces with controlled thickness. The study explores the impact of synthesis parameters on the physical, chemical, and morphological properties of CZTS films and their influence on solar cell efficiency. Finally, current challenges and prospects are discussed, opening perspectives for advances in synthesizing and applying CZTS thin films for photovoltaic technologies.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101018"},"PeriodicalIF":7.1,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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