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Cobalt (II) phthalocyanine derived Co3O4@HCNFs as highly effective bifunctional electrocatalysts for iodide redox couple reduction (IRR) and oxygen reduction reaction (ORR)

Next Materials

Pub Date : 2025-02-05 DOI: 10.1016/j.nxmate.2025.100518

Ziyu Guo, Wenyu Gong, Jianing Guo, Mingxing Wu

Developing low-cost electrocatalysts for iodide redox couple reduction (IRR) and oxygen reduction reaction (ORR), applied in dye-sensitized solar cells (DSCs) and Zinc-air batteries (ZABs) is of crucial significance for the fields of energy conversion and energy storage. Herein, nitrogen-enriched hollow carbon nanofibers with opens at both ends (HCNFs) are first synthesized, which show decent catalytic activity for the IRR, and a power conversion efficiency (PCE) of 6.95 % is achieved by the corresponding DSCs. Cobalt (II) phthalocyanine derived Co₃O₄ incorporated HCNFs (Co₃O₄@HCNFs) are further prepared to improve the catalytic activity, generating a high PCE of 8.36 %, indicating a photovoltaic enhancement of 20.3 % as compared with HCNFs. Similarly, Co₃O₄@HCNFs also exhibit excellent ORR performance, and the half-wave potential (E_1/2) is up to 0.827 V, with the limiting current density (J_lim) improved to 4.54 mA·cm⁻². In contrast, the E_1/2 and J_lim of the pristine HCNFs are 0.630 V and 3.99 mA·cm⁻², respectively, much lower than those of Co₃O₄@HCNFs. The remarkable catalytic activity of Co₃O₄@HCNFs can be ascribed the introduced Co₃O₄, resulting in additional active sites of Co-N-C, and the synergistic effects between metals and carbon also accounts for the enhanced catalytic activity. Moreover, the specific hollow structure with opens at both ends is beneficial for mass diffusion to ensure sufficient contact between the electrolyte and the electrocatalysts, which is also a possible reason for the high catalytic activity of Co₃O₄@HCNFs. This work is expected to provide a feasible strategy for exploring low-cost and highly effective bifunctional IRR/ORR electrocatalysts for DSCs and ZABs.

{"title":"Cobalt (II) phthalocyanine derived Co3O4@HCNFs as highly effective bifunctional electrocatalysts for iodide redox couple reduction (IRR) and oxygen reduction reaction (ORR)","authors":"Ziyu Guo, Wenyu Gong, Jianing Guo, Mingxing Wu","doi":"10.1016/j.nxmate.2025.100518","DOIUrl":"10.1016/j.nxmate.2025.100518","url":null,"abstract":"<div><div>Developing low-cost electrocatalysts for iodide redox couple reduction (IRR) and oxygen reduction reaction (ORR), applied in dye-sensitized solar cells (DSCs) and Zinc-air batteries (ZABs) is of crucial significance for the fields of energy conversion and energy storage. Herein, nitrogen-enriched hollow carbon nanofibers with opens at both ends (HCNFs) are first synthesized, which show decent catalytic activity for the IRR, and a power conversion efficiency (PCE) of 6.95 % is achieved by the corresponding DSCs. Cobalt (II) phthalocyanine derived Co<sub>3</sub>O<sub>4</sub> incorporated HCNFs (Co<sub>3</sub>O<sub>4</sub>@HCNFs) are further prepared to improve the catalytic activity, generating a high PCE of 8.36 %, indicating a photovoltaic enhancement of 20.3 % as compared with HCNFs. Similarly, Co<sub>3</sub>O<sub>4</sub>@HCNFs also exhibit excellent ORR performance, and the half-wave potential (E<sub>1/2</sub>) is up to 0.827 V, with the limiting current density (J<sub>lim</sub>) improved to 4.54 mA·cm<sup>−2</sup>. In contrast, the E<sub>1/2</sub> and J<sub>lim</sub> of the pristine HCNFs are 0.630 V and 3.99 mA·cm<sup>−2</sup>, respectively, much lower than those of Co<sub>3</sub>O<sub>4</sub>@HCNFs. The remarkable catalytic activity of Co<sub>3</sub>O<sub>4</sub>@HCNFs can be ascribed the introduced Co<sub>3</sub>O<sub>4</sub>, resulting in additional active sites of Co-N-C, and the synergistic effects between metals and carbon also accounts for the enhanced catalytic activity. Moreover, the specific hollow structure with opens at both ends is beneficial for mass diffusion to ensure sufficient contact between the electrolyte and the electrocatalysts, which is also a possible reason for the high catalytic activity of Co<sub>3</sub>O<sub>4</sub>@HCNFs. This work is expected to provide a feasible strategy for exploring low-cost and highly effective bifunctional IRR/ORR electrocatalysts for DSCs and ZABs.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100518"},"PeriodicalIF":0.0,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159996","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}

引用次数: 0

Fabrication of self-standing hyperbranched poly(ethyleneimine) film with shape-memory and copper adsorption behavior via simple polymer reaction with tetraazacalix[2]arene[2]triazine dichloride

Next Materials

Pub Date : 2025-02-05 DOI: 10.1016/j.nxmate.2025.100513

Tomohiro Suzuki , Ryota Shibata , Tadashi Tsukamoto , Yuji Shibasaki

Hyperbranched poly(ethyleneimine) (PEI, M_n 10 kDa) was simply reacted with tetraazacalix[2]arene[2]triazine (ACAT) dichloride in a feed ratio from 1:1 to 1:5 under diluted conditions to produce self-standing PEI modified films with good mechanical strength and thermal properties. In a dynamic mechanical analysis (DMA), the glass transition temperature of the modified polymer was observed from −13.6°C to 35.1 °C, and this value increased with the amount of ACAT modifier. A small relaxation was observed in DMA at temperatures above 70°C, which was due to the partial cleavage of the hydrogen bonds between ACAT and PEI segments. By virtue of these two relaxation phenomena, the PEI modified films exhibited shape-memory properties. Since the films were insoluble in water, their copper adsorption behavior was studied, finding that the modified polymer powder rapidly adsorbed 1.5 mg/g copper ion within 1 h.

引用次数: 0

Investigation of structure, mechanical properties, and electrical conductivity of LixCo(1-x)O2: Validation using a nanoquantum model

Next Materials

Pub Date : 2025-02-04 DOI: 10.1016/j.nxmate.2025.100510

Obaidallah A. Algethami

Nanoquantum models are built in order to advance nanotechnology by adapting classical laws to quantum principles using string theory. In this study, a theoretical model based on string theory is proposed to meld — and then extract — mechanical and electrical properties that recognize the particle-wave duality inherent in Quantum laws. Experimentally, lithium cobalt oxide (Li_xCo_(1-x)O₂; x = 0.1, 0.3, 0.5, 0.7, and 0.9) nanoparticles were synthesized by the sol-gel method. X-ray diffraction analysis revealed the hexagonal crystal structure (R-3m space group). It has been shown that reducing the lithium concentration results in greater dislocation density, internal stress, strain, and smaller nanocrystal size. Electrical measurements exhibit semiconducting behavior, with increasing conductivity as a function of temperature and lithium concentration. Improved conductivity is inherently tied to storage capacity and so offers the potential to improve lithium-ion battery performance. Infrared analysis shows that Li-Co bonds exist at wavenumbers of approximately 600 and 900 cm⁻¹ and Co bonds at about 1080 and 1580 cm⁻¹ . The quantum model agrees well with the measured electrical and mechanical properties and provides a new framework for acceleration nanotechnology research. The results indicate a systematic approach to enhancing nanomaterials for energy storage and other applications.

{"title":"Investigation of structure, mechanical properties, and electrical conductivity of LixCo(1-x)O2: Validation using a nanoquantum model","authors":"Obaidallah A. Algethami","doi":"10.1016/j.nxmate.2025.100510","DOIUrl":"10.1016/j.nxmate.2025.100510","url":null,"abstract":"<div><div>Nanoquantum models are built in order to advance nanotechnology by adapting classical laws to quantum principles using string theory. In this study, a theoretical model based on string theory is proposed to meld — and then extract — mechanical and electrical properties that recognize the particle-wave duality inherent in Quantum laws. Experimentally, lithium cobalt oxide (Li<sub>x</sub>Co<sub>(1-x)</sub>O<sub>2</sub>; x = 0.1, 0.3, 0.5, 0.7, and 0.9) nanoparticles were synthesized by the sol-gel method. X-ray diffraction analysis revealed the hexagonal crystal structure (R-3m space group). It has been shown that reducing the lithium concentration results in greater dislocation density, internal stress, strain, and smaller nanocrystal size. Electrical measurements exhibit semiconducting behavior, with increasing conductivity as a function of temperature and lithium concentration. Improved conductivity is inherently tied to storage capacity and so offers the potential to improve lithium-ion battery performance. Infrared analysis shows that Li-Co bonds exist at wavenumbers of approximately 600 and 900 cm⁻¹ and Co bonds at about 1080 and 1580 cm⁻¹ . The quantum model agrees well with the measured electrical and mechanical properties and provides a new framework for acceleration nanotechnology research. The results indicate a systematic approach to enhancing nanomaterials for energy storage and other applications.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100510"},"PeriodicalIF":0.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159995","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}

引用次数: 0

A review on perovskite materials for photovoltaic applications

Next Materials

Pub Date : 2025-02-03 DOI: 10.1016/j.nxmate.2025.100494

Lalruat Sanga , Celestine Lalengmawia , Zosiamliana Renthlei , Sougaijam Thasana Chanu , Lalhum Hima , Ningthoujam Surajkumar Singh , Andre Yvaz , Sagar Bhattarai , D.P. Rai

Perovskite materials have been intensively studied and successfully employed in solar application fields. However, as the reason of their instability in its structure and the presence of toxic elements like lead element (Pb), the performance of these materials has been hindering the production and successful manufacturing of perovskite solar cells (PSCs) at the commercial level. Researchers have been exploring numerous types of materials which seek the results of augmenting the optical properties and performances of the perovskite materials to pave the way to obtain and successfully fabricate and manufacture cost-effective and environmentally friendly perovskite photovoltaic cells. To successfully develop and engineer PSCs for commercialization, it is imperative to have a clear insight into the performance of the material, the features and weaknesses to be addressed for specific types in the field with which necessary improvements could be made. Herein, we report a brief review among the various emerging perovskite materials for photovoltaic applications to gain knowledge of the properties and characteristics of perovskites for utilization in solar cells and its future scope by which we could ultimately decide what measures and changes need to be done in the PV world.

{"title":"A review on perovskite materials for photovoltaic applications","authors":"Lalruat Sanga , Celestine Lalengmawia , Zosiamliana Renthlei , Sougaijam Thasana Chanu , Lalhum Hima , Ningthoujam Surajkumar Singh , Andre Yvaz , Sagar Bhattarai , D.P. Rai","doi":"10.1016/j.nxmate.2025.100494","DOIUrl":"10.1016/j.nxmate.2025.100494","url":null,"abstract":"<div><div>Perovskite materials have been intensively studied and successfully employed in solar application fields. However, as the reason of their instability in its structure and the presence of toxic elements like lead element (Pb), the performance of these materials has been hindering the production and successful manufacturing of perovskite solar cells (PSCs) at the commercial level. Researchers have been exploring numerous types of materials which seek the results of augmenting the optical properties and performances of the perovskite materials to pave the way to obtain and successfully fabricate and manufacture cost-effective and environmentally friendly perovskite photovoltaic cells. To successfully develop and engineer PSCs for commercialization, it is imperative to have a clear insight into the performance of the material, the features and weaknesses to be addressed for specific types in the field with which necessary improvements could be made. Herein, we report a brief review among the various emerging perovskite materials for photovoltaic applications to gain knowledge of the properties and characteristics of perovskites for utilization in solar cells and its future scope by which we could ultimately decide what measures and changes need to be done in the PV world.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100494"},"PeriodicalIF":0.0,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159989","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}

引用次数: 0

Inhibition of zinc dendrite growth by a preferential crystal surface modulation strategy

Next Materials

Pub Date : 2025-02-03 DOI: 10.1016/j.nxmate.2025.100517

Weihua Zhou , Junrun Feng , Zhuo Chen , Ziming Wan , Haoyu Feng , Lin Sheng , Zhuo Peng , Wenyuan Zhang , Zhangxiang Hao

Aqueous zinc-ion batteries (AZIBs) are pivotal in advancing energy storage systems and contributing to global electrification due to their high safety and low cost. However, the development of AZIBs is limited by the several challenges originating from the anode/electrolyte interface such as dendrite growth, hydrogen evolution reactions, and Zn corrosion. Compared to traditional methods which stabilize the interface by constructing artificial/in-situ formed interphases, we propose a novel method to selectively adjust the array of stripes on the Zn surface without altering the chemical composition. Considering that Zn (002) promotes the uniform deposition of Zn while Zn (100) is generally more stable and less reactive, adjusting the ratio of active Zn (002) to Zn (100) can significantly enhance the stability and reversibility of Zn metal. With the AS treatment of 20 minutes, the ratio between Zn (002) to Zn (100) is around 0.93, which exhibits the best electrochemical performance and enables the Zn//Zn symmetric battery to cycle over 2200 hours at 2 mA cm⁻² and 1 mAh cm⁻². The full cell AS-20//MnO₂ had capacity retention of 41.4 % after 600 cycles under a current density of 0.5 A g⁻¹, whereas that of bare Zn//MnO₂ was less than 14.5 %.

{"title":"Inhibition of zinc dendrite growth by a preferential crystal surface modulation strategy","authors":"Weihua Zhou , Junrun Feng , Zhuo Chen , Ziming Wan , Haoyu Feng , Lin Sheng , Zhuo Peng , Wenyuan Zhang , Zhangxiang Hao","doi":"10.1016/j.nxmate.2025.100517","DOIUrl":"10.1016/j.nxmate.2025.100517","url":null,"abstract":"<div><div>Aqueous zinc-ion batteries (AZIBs) are pivotal in advancing energy storage systems and contributing to global electrification due to their high safety and low cost. However, the development of AZIBs is limited by the several challenges originating from the anode/electrolyte interface such as dendrite growth, hydrogen evolution reactions, and Zn corrosion. Compared to traditional methods which stabilize the interface by constructing artificial/<em>in-situ</em> formed interphases, we propose a novel method to selectively adjust the array of stripes on the Zn surface without altering the chemical composition. Considering that Zn (002) promotes the uniform deposition of Zn while Zn (100) is generally more stable and less reactive, adjusting the ratio of active Zn (002) to Zn (100) can significantly enhance the stability and reversibility of Zn metal. With the AS treatment of 20 minutes, the ratio between Zn (002) to Zn (100) is around 0.93, which exhibits the best electrochemical performance and enables the Zn//Zn symmetric battery to cycle over 2200 hours at 2 mA cm<sup>−2</sup> and 1 mAh cm<sup>−2</sup>. The full cell AS-20//MnO<sub>2</sub> had capacity retention of 41.4 % after 600 cycles under a current density of 0.5 A g<sup>−1</sup>, whereas that of bare Zn//MnO<sub>2</sub> was less than 14.5 %.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100517"},"PeriodicalIF":0.0,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159998","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}

引用次数: 0

Sodium Alginate-chitosan-starch based glue formulation for sealing biopolymer films

Next Materials

Pub Date : 2025-01-31 DOI: 10.1016/j.nxmate.2025.100507

Sazzadur Rahman , Achyut Konwar , Shalini Gurumayam , Jagat Chandra Borah , Devasish Chowdhury

Biopolymers are potential materials that will eventually replace petroleum-based polymers in various applications, including packaging applications. One of the systems that will be pre-requisitely required is the sealing of biopolymer. Conventional sealing techniques, viz. heat sealing and chemical adhesive, are not suitable for sealing biopolymers. In this work, we have demonstrated the formulation of biopolymer-based glue, which is effective in sealing biopolymers. The formulation includes a rice biopolymer-based composite material with chitosan and sodium alginate and, followed by cross-linking with a natural base (pH∼ 12). The developed glue formulation is effective in joining the litho paper, cotton, and guar gum-chitosan cross-linked biopolymer film (GG-CH-C). The lap shear strength of the prepared glue formulation is maximum for the substrate sodium alginate-chitosan cross-linked biopolymer film. In the presence of high humidity (100 % RH), the lap shear strength of the prepared glue formulation decreases; however, it was still measurable and found to be (2.99 ± 0.34) MPa. A plausible mechanism is discussed to explain the chemical interactions between the prepared glue formulation and the biopolymer film substrates. The cytotoxicity of the prepared glue is tested against CC1 hepatocytes. Hence, rice-biopolymer-based composite is an excellent glue material that is found to be effective in joining two biopolymeric surfaces.

{"title":"Sodium Alginate-chitosan-starch based glue formulation for sealing biopolymer films","authors":"Sazzadur Rahman , Achyut Konwar , Shalini Gurumayam , Jagat Chandra Borah , Devasish Chowdhury","doi":"10.1016/j.nxmate.2025.100507","DOIUrl":"10.1016/j.nxmate.2025.100507","url":null,"abstract":"<div><div>Biopolymers are potential materials that will eventually replace petroleum-based polymers in various applications, including packaging applications. One of the systems that will be pre-requisitely required is the sealing of biopolymer. Conventional sealing techniques, viz. heat sealing and chemical adhesive, are not suitable for sealing biopolymers. In this work, we have demonstrated the formulation of biopolymer-based glue, which is effective in sealing biopolymers. The formulation includes a rice biopolymer-based composite material with chitosan and sodium alginate and, followed by cross-linking with a natural base (pH∼ 12). The developed glue formulation is effective in joining the litho paper, cotton, and guar gum-chitosan cross-linked biopolymer film (GG-CH-C). The lap shear strength of the prepared glue formulation is maximum for the substrate sodium alginate-chitosan cross-linked biopolymer film. In the presence of high humidity (100 % RH), the lap shear strength of the prepared glue formulation decreases; however, it was still measurable and found to be (2.99 ± 0.34) MPa. A plausible mechanism is discussed to explain the chemical interactions between the prepared glue formulation and the biopolymer film substrates. The cytotoxicity of the prepared glue is tested against CC1 hepatocytes. Hence, rice-biopolymer-based composite is an excellent glue material that is found to be effective in joining two biopolymeric surfaces.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100507"},"PeriodicalIF":0.0,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159992","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}

引用次数: 0

Development of ABS polymer composites incorporating dual fillers of Titanium Dioxide and Tungsten

Next Materials

Pub Date : 2025-01-31 DOI: 10.1016/j.nxmate.2025.100499

Manojkumar Yadav , S.P. Deshmukh , V.S. Korpale , Sajjan Kumar Lal

Acrylonitrile Butadiene Styrene (ABS) and its composites are the most widely used material engineering applications. In this research work the reinforcement of fillers with the base polymer matrix ABS material was carried out to enhance certain properties. The unfilled ABS, loaded with dual fillers viz., Titanium Dioxide and Tungsten (TiO₂W) in weight (grams) the percentage of 2.5 %, 5 %, 7.5 % & 10 % respectively. Developed ABS composites of different compositions, were tested for their mechanical properties and material Flow Rate (MFR). Scanning Electron Microscopy (SEM) techniques were adopted to observe the morphology of developed composites. The results show a loss of tensile strength of around 57 % by incorporating both fillers by 10 wt%. Reduced composite strain shows an improvement in its hardness up to 10.33 % due to adding filler. There is the reduction of elongation in ABS/TiO₂Wcomposite of 70 % SEM images of the test samples depict the homogeneity of reinforced filler materials with ABS. Melt Flow Rate (MFR) characterization shows improvement in MFR around 82 %, due to filler adding from 2.5 wt% to 10 wt%.

{"title":"Development of ABS polymer composites incorporating dual fillers of Titanium Dioxide and Tungsten","authors":"Manojkumar Yadav , S.P. Deshmukh , V.S. Korpale , Sajjan Kumar Lal","doi":"10.1016/j.nxmate.2025.100499","DOIUrl":"10.1016/j.nxmate.2025.100499","url":null,"abstract":"<div><div>Acrylonitrile Butadiene Styrene (ABS) and its composites are the most widely used material engineering applications. In this research work the reinforcement of fillers with the base polymer matrix ABS material was carried out to enhance certain properties. The unfilled ABS, loaded with dual fillers viz., Titanium Dioxide and Tungsten (TiO<sub>2</sub>W) in weight (grams) the percentage of 2.5 %, 5 %, 7.5 % & 10 % respectively. Developed ABS composites of different compositions, were tested for their mechanical properties and material Flow Rate (MFR). Scanning Electron Microscopy (SEM) techniques were adopted to observe the morphology of developed composites. The results show a loss of tensile strength of around 57 % by incorporating both fillers by 10 wt%. Reduced composite strain shows an improvement in its hardness up to 10.33 % due to adding filler. There is the reduction of elongation in ABS/TiO<sub>2</sub>Wcomposite of 70 % SEM images of the test samples depict the homogeneity of reinforced filler materials with ABS. Melt Flow Rate (MFR) characterization shows improvement in MFR around 82 %, due to filler adding from 2.5 wt% to 10 wt%.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100499"},"PeriodicalIF":0.0,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159993","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}

引用次数: 0

Functionalized magnetite-biochar with live and dead bacteria for adsorption-biosorption of highly toxic metals: Cd, Hg, and Pb

Next Materials

Pub Date : 2025-01-01 DOI: 10.1016/j.nxmate.2025.100487

Yudha Gusti Wibowo , Dedy Anwar , Hana Safitri , Indra Surya , Sudibyo Sudibyo , Ahmad Tawfiequrrahman Yuliansyah , Himawan Tri Bayu Murti Petrus

Environmental pollution by heavy metals such as cadmium (Cd), mercury (Hg), and lead (Pb) poses severe risks to ecological and human health. Conventional remediation technologies often fall short in efficacy and sustainability. This study explores a novel hybrid system combining functionalized magnetite-biochar with live and dead bacteria for enhanced adsorption-biosorption of these contaminants from wastewater. The synergy of magnetite-biochar and bacterial biomass exploits the high adsorption capacity of the composite and the unique biosorptive abilities of bacteria, offering a dual mechanism for metal removal. The composite's effectiveness was assessed through comparative studies, demonstrating superior removal efficiencies and operational advantages over traditional methods. Key findings include the composite's ability to function effectively across a broad range of environmental conditions and its potential for regeneration and reuse, highlighting its suitability for scalable applications. This research not only presents a viable alternative to existing wastewater treatment technologies but also aligns with sustainable practices by minimizing environmental impact and reducing treatment costs. The promising results suggest significant potential for the practical deployment of this technology in mitigating heavy metal pollution, urging further development towards commercialization and industrial use. The integration of such innovative materials could revolutionize wastewater treatment strategies and contribute to global sustainability efforts in pollution control.

{"title":"Functionalized magnetite-biochar with live and dead bacteria for adsorption-biosorption of highly toxic metals: Cd, Hg, and Pb","authors":"Yudha Gusti Wibowo , Dedy Anwar , Hana Safitri , Indra Surya , Sudibyo Sudibyo , Ahmad Tawfiequrrahman Yuliansyah , Himawan Tri Bayu Murti Petrus","doi":"10.1016/j.nxmate.2025.100487","DOIUrl":"10.1016/j.nxmate.2025.100487","url":null,"abstract":"<div><div>Environmental pollution by heavy metals such as cadmium (Cd), mercury (Hg), and lead (Pb) poses severe risks to ecological and human health. Conventional remediation technologies often fall short in efficacy and sustainability. This study explores a novel hybrid system combining functionalized magnetite-biochar with live and dead bacteria for enhanced adsorption-biosorption of these contaminants from wastewater. The synergy of magnetite-biochar and bacterial biomass exploits the high adsorption capacity of the composite and the unique biosorptive abilities of bacteria, offering a dual mechanism for metal removal. The composite's effectiveness was assessed through comparative studies, demonstrating superior removal efficiencies and operational advantages over traditional methods. Key findings include the composite's ability to function effectively across a broad range of environmental conditions and its potential for regeneration and reuse, highlighting its suitability for scalable applications. This research not only presents a viable alternative to existing wastewater treatment technologies but also aligns with sustainable practices by minimizing environmental impact and reducing treatment costs. The promising results suggest significant potential for the practical deployment of this technology in mitigating heavy metal pollution, urging further development towards commercialization and industrial use. The integration of such innovative materials could revolutionize wastewater treatment strategies and contribute to global sustainability efforts in pollution control.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"6 ","pages":"Article 100487"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143132505","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}

引用次数: 0

Sodium-ion layered oxide cathode materials based on oxygen anion redox: Mechanism study, voltage hysteresis, and air stability improvement

Next Materials

Pub Date : 2025-01-01 DOI: 10.1016/j.nxmate.2024.100480

Menglin Ke, Ming Wan, Wendi Dong, Tianyu Wei, Hui Dou, Xiaogang Zhang

With the growing demand for lithium-ion batteries (LIBs) in electric vehicles and large-scale energy storage, the scarcity and uneven distribution of lithium resources pose significant challenges. Sodium-ion batteries (SIBs) present a promising alternative due to their low cost and abundant sodium reserves. Among the various cathode materials, layered oxides have gained attention for their cost-effectiveness, simple synthesis, and high specific capacity. However, the limited contribution of cationic redox reactions to total capacity necessitates the exploration of anionic redox reactions (ARR), which can enhance capacity and overall electrochemical performance. Despite the potential benefits of ARR, challenges such as poor air stability, voltage decay, hysteresis, and cycle life hinder the commercialization of sodium-ion layered materials. This review systematically summarizes the mechanisms underlying ARR, voltage hysteresis, and air stability, while also proposing modification strategies to enhance performance. By examining energy band theory, bonding mechanisms, and vacancy defects, as well as the mechanisms of voltage hysteresis and air stability, this study aims to provide valuable insights and guidance for advancing the development of sodium-ion layered oxide cathodes.

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引用次数: 0

Polypyrrole-based chalcogen/chalcogenide nano-composites and their energy applications: A review

Next Materials

Pub Date : 2025-01-01 DOI: 10.1016/j.nxmate.2025.100500

Aneet Abhishek, Naeem Mohammad, Pawan K. Khanna

Substantial research and development in the field of conducting polymers and their composites has opened up new avenues in the field of energy applications. Conducting polymers exhibited various properties that can be tuned according to necessity, which has led to extensive research on them, including hybridizing them with nano-particles to eliminate their limitations. The hybrid nano-composites exhibited great potential when conducting polymers were combined with either transition metals, their oxides, metal chalcogenides and/or chalcogens. Consequently, amongst the conducting polymers, polypyrrole (PPy) has gained high popularity in regards to its attributes. Researchers have developed number of methods for synthesizing PPy and their nano-composites with chalcogens/chalcogenides over the past two decades for different fields of application. Chalcogens/chalcogenides such as sulfur (S), selenium (Se) and tellurium (Te) using a variety of their precursors and various in-situ/ex-situ polymerization techniques for potential nano-composites have been designed and documented in the literature. The nano-composites have technological importance owing to their tunable properties, such as electrical conductivity, thermal conductivity, mechanical strength, structural enhancement and optical behaviour etc. Presence of chalcogen significantly improve opto-electronic properties of PPy and its nano-composites to make them versatile materials for a range of electronic applications. In current scenario, the necessity for creative energy solutions is required for global energy crisis. Waste energy recycling can convert waste heat into power in an economical and environmentally beneficial manner by using polymer-nano-composites based thermoelectric (TE) technologies. This review provides an overview on synthesis of PPy/chalcogen or chalcogenides composites and their characterizations e.g. X-ray diffractions (XRD), UV-Visible, infrared and Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) for analysis of their salient properties desired for a variety of applications e.g. gas sensing, photovoltaics, supercapacitors, and thermoelectric generators etc.

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引用次数: 0

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