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3D Porous Activated Carbon Network Derived from Luffa Sponge for Sustainable High-Performance Supercapacitors 用于可持续高性能超级电容器的丝瓜海绵三维多孔活性炭网络
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2025-05-26 DOI: 10.1002/cnma.202500147
Navaneethan Duraisamy, Krishna Shenniangirivalasu Kandasamy, Elumalai Dhandapani, Kavitha Kandiah, Sarojini Jeeva Panchu, Hendrik C Swart
{"title":"3D Porous Activated Carbon Network Derived from Luffa Sponge for Sustainable High-Performance Supercapacitors","authors":"Navaneethan Duraisamy,&nbsp;Krishna Shenniangirivalasu Kandasamy,&nbsp;Elumalai Dhandapani,&nbsp;Kavitha Kandiah,&nbsp;Sarojini Jeeva Panchu,&nbsp;Hendrik C Swart","doi":"10.1002/cnma.202500147","DOIUrl":"https://doi.org/10.1002/cnma.202500147","url":null,"abstract":"<p>The development of efficient energy storage devices requires the exploration of new, economically feasible, and sustainable electrode materials. To develop high-performance electrode materials for supercapacitors (SCs), a microwave technique is employed to prepare activated carbon from luffa fibers (biowaste). As a result of the unique luffa network and its macroscopically shaped design, a 3D porous activated carbon electrode is fabricated, and its electrochemical performance is evaluated in a 1 <span>m</span> Na<sub>2</sub>SO<sub>4</sub> aqueous electrolyte using a three-electrode system. Due to the high specific surface area of 3D-porous microwave-activated carbons (PMACs) (380 m<sup>2</sup> g<sup>−1</sup>), the PMACs exhibit a specific capacitance of ≈290 F g<sup>−1</sup> at 2 A g<sup>−1</sup>, along with excellent cyclability of 89% over 5000 charging/discharging cycles at 20 A g<sup>−1</sup>. The enhanced electrochemical characteristics of PMACs are attributed to the formation of micro-/mesoporosity induced by microwave irradiation. A symmetric supercapacitor device (PMACs//PMACs) is constructed, demonstrating an excellent specific capacitance of 75.4 F g<sup>−1</sup> at 2 A g<sup>−1</sup>, a maximum energy density of 26.9 W h kg<sup>−1</sup> at 1307.6 W kg<sup>−1</sup>, and a power density of 48,941.2 W kg<sup>−1</sup> at 6.9 W h kg<sup>−1</sup>, with 80.6% capacitance retention after 5000 charge/discharge cycles.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnma.202500147","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144598710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Borophene Oxide and Graphene Oxide for Renewable Energy: A Comparative Study on their Catalytic Performance in Sodium Borohydride Hydrolysis for Hydrogen Generation 用于可再生能源的氧化硼苯和氧化石墨烯:它们在硼氢化钠水解制氢催化性能的比较研究
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2025-05-26 DOI: 10.1002/cnma.202500031
Yen Yiin Lee, Shuen Lam, Swee Pin Yeap, Kah Hou Teng, Zaher Mundher Yaseen, Andy Shaw, Vijayakumar Karunamoothei, Yeah Hui Loh, Leong Sim Teh
{"title":"Borophene Oxide and Graphene Oxide for Renewable Energy: A Comparative Study on their Catalytic Performance in Sodium Borohydride Hydrolysis for Hydrogen Generation","authors":"Yen Yiin Lee,&nbsp;Shuen Lam,&nbsp;Swee Pin Yeap,&nbsp;Kah Hou Teng,&nbsp;Zaher Mundher Yaseen,&nbsp;Andy Shaw,&nbsp;Vijayakumar Karunamoothei,&nbsp;Yeah Hui Loh,&nbsp;Leong Sim Teh","doi":"10.1002/cnma.202500031","DOIUrl":"https://doi.org/10.1002/cnma.202500031","url":null,"abstract":"<p>The recent rise of borophene as a new 2D material has triggered competition with the well-known graphene. The present work serves as the first attempt to compare the efficiency of borophene oxide (BO) and graphene oxide (GO) in catalyzing NaBH<sub>4</sub> hydrolysis for hydrogen generation. For a fair comparison, the BO and GO particles are synthesized using the same improved Hummers’ method. Morphological studies show that both BO and GO appear in plate-like shapes; however, GO exhibits a more scrunched and rippled structure with larger interlayer spacing. BO and GO exhibit more oxygen-containing groups than their bulk counterparts. X-ray diffraction analysis indicates that BO has a reduced crystallinity, while GO exhibits turbostratic disorder. Regarding catalytic properties, both BO and GO are found to be on par as catalysts, increasing hydrogen yield from NaBH<sub>4</sub> hydrolysis by 25 times in 30 s, offering new insights for the clean energy industry.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144598709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Recycling Spent Synthesis Liquor for Enhanced Production of ZIF-67: Characterization and Morphological Insights 回收废合成液以提高ZIF-67的产量:表征和形态学见解
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2025-05-19 DOI: 10.1002/cnma.202500100
Lucas Battiston, Barbara Gerbelli, Fabiano Yokaichiya, Ivan Barros, Kátia Oliveira, Cícero Ávila-Neto
{"title":"Recycling Spent Synthesis Liquor for Enhanced Production of ZIF-67: Characterization and Morphological Insights","authors":"Lucas Battiston,&nbsp;Barbara Gerbelli,&nbsp;Fabiano Yokaichiya,&nbsp;Ivan Barros,&nbsp;Kátia Oliveira,&nbsp;Cícero Ávila-Neto","doi":"10.1002/cnma.202500100","DOIUrl":"https://doi.org/10.1002/cnma.202500100","url":null,"abstract":"<p>This study reports the preparation and characterization of zeolitic imidazolate framework-67 (ZIF-67) through the recycling of spent synthesis liquor containing unreacted 2-methylimidazole. The recycling enhances the yield of ZIF-67 while maintaining the dodecahedral rhombic morphology of the particles. In the first synthesis, a molar ratio of 1:26 (Co<sup>2</sup>:2-methylimidazole) results in particles with an average diameter of 230 nm and a surface area of 1374 m<sup>2</sup> g<sup>−1</sup>. The first recycling step produces ZIF-67 particles that doubl in diameter and surface area, reaching 520 nm and 1690 m<sup>2</sup> g<sup>−1</sup>, respectively. In the second recycling step, the particles further increase to 1040 nm in diameter and 1806 m<sup>2</sup> g<sup>−1</sup> in surface area. This increase in diameter is attributed to changes in the metal-to-ligand ratio, which affects the nucleation and growth rates. Increased surface area is linked to a reduction in the average micropore diameter, which decreases from 1.42 nm (first synthesis) to 1.37 nm (second recycling step). There is a 6 m<sup>2</sup> g<sup>−1</sup> increase in surface area for every 0.001 cm<sup>3</sup> g<sup>−1</sup> increase in the volume of micropores. This indicates that the spent liquor can be utilized in consecutive batches to produce ZIF-67, minimizing reagent waste.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnma.202500100","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144598471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimized Electrochemical Behavior of Carbon-Coated Ti-Doped Na3V2(PO4)2F3 Cathodes for Sodium-Ion Batteries 钠离子电池碳包覆ti掺杂Na3V2(PO4)2F3阴极电化学性能优化
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2025-05-19 DOI: 10.1002/cnma.202500070
Pathak Rajkumar Babunar, Sameer Tirkey, Ananta Sarkar
{"title":"Optimized Electrochemical Behavior of Carbon-Coated Ti-Doped Na3V2(PO4)2F3 Cathodes for Sodium-Ion Batteries","authors":"Pathak Rajkumar Babunar,&nbsp;Sameer Tirkey,&nbsp;Ananta Sarkar","doi":"10.1002/cnma.202500070","DOIUrl":"https://doi.org/10.1002/cnma.202500070","url":null,"abstract":"<p>Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>F<sub>3</sub> (NVPF) has emerged as a very promising cathode material for sodium-ion batteries (SIBs), on account of its durable structural reliability and impressive electrochemical performance. However, their practical use is limited by low capacity, poor conductivity, slow Na-ion transport, and capacity fading, requiring structural and surface modifications. To overcome its inherent low conductivity, carbon-coated Ti-doped NVPF (designated as NVPF-Ti-x) is prepared via a sol–gel process, with x values of 0, 0.01, 0.02, 0.03, 0.04, and 0.05. Among these variants, NVPF-Ti-0.02 demonstrates the most remarkable electrochemical behavior of high reversible capacity and rate capability. NVPF-Ti-0.02 achieves an exceptional stabilized specific capacity of 133 mAh g<sup>−1</sup> at a current density of 50 mA g<sup>−1</sup> after the first cycle onward. It shows a high reversible capacity retention of 94.76% after 100 cycles and 81% after 300 cycles. These results highlight the effectiveness of Ti doping and carbon coating in significantly boosting the conductivity and mechanical stability of NVPF. The improved performance of NVPF-Ti-0.02 underscores its potential as a leading candidate for advanced SIB technologies, offering both high capacity and robust cycling stability.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144598470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Flexing the Future: Strategic Insights into Wearable Sensor Development 柔性未来:可穿戴传感器发展的战略洞察
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2025-05-15 DOI: 10.1002/cnma.202500063
Vandana Molahalli, Gowri Soman, Aman Sharma, Kiran Bijapur, Nattaporn Chattham, Ranjith Krishna Pai, Abdullah Alodhayb, Gurumurthy Hegde
{"title":"Flexing the Future: Strategic Insights into Wearable Sensor Development","authors":"Vandana Molahalli,&nbsp;Gowri Soman,&nbsp;Aman Sharma,&nbsp;Kiran Bijapur,&nbsp;Nattaporn Chattham,&nbsp;Ranjith Krishna Pai,&nbsp;Abdullah Alodhayb,&nbsp;Gurumurthy Hegde","doi":"10.1002/cnma.202500063","DOIUrl":"https://doi.org/10.1002/cnma.202500063","url":null,"abstract":"<p>Recent advances in materials science, microelectronics, and data analytics have propelled the flexible and wearable sensors field forward. This comprehensive review summarizes the current state of research in flexible and wearable sensors, shedding light on their evolving technology, applications, and potential impact on various industries. The key developments in sensor materials, fabrication techniques, and integration methods, highlighting their implications for human–machine interaction, health monitoring, sports and fitness, and beyond are explored. Additionally, the difficulties and possibilities in this quickly developing field are addressed and perspectives on the future paths and possible uses of wearable and flexible sensors, highlighting their influence on environmental monitoring, personalized technology, and the current healthcare landscape are provided. This review serves as a resource for researchers, engineers, and innovators interested in cutting-edge developments and emerging opportunities in the realm of flexible and wearable sensors.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144598334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Surface Modification of Co3O4 by HfO2 for Efficient Bifunctional Electrocatalyst for Hydrogen and Oxygen Evolution 用HfO2对Co3O4表面进行高效双功能析氢氧电催化剂的改性
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2025-05-14 DOI: 10.1002/cnma.202500085
Anju Rani, Sukriti Sagar, Imtiaz Ahmed, Krishna Kanta Haldar
{"title":"Surface Modification of Co3O4 by HfO2 for Efficient Bifunctional Electrocatalyst for Hydrogen and Oxygen Evolution","authors":"Anju Rani,&nbsp;Sukriti Sagar,&nbsp;Imtiaz Ahmed,&nbsp;Krishna Kanta Haldar","doi":"10.1002/cnma.202500085","DOIUrl":"https://doi.org/10.1002/cnma.202500085","url":null,"abstract":"<p>This study investigates the significant enhancement of electrocatalytic activity for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) achieved through surface modification of cobalt oxide (Co<sub>3</sub>O<sub>4</sub>) with hafnium dioxide (HfO<sub>2</sub>). A mechanochemical approach is used to synthesize the surface-modified catalyst, optimizing the electronic properties and active site accessibility of Co<sub>3</sub>O<sub>4</sub> to attain superior electrocatalytic performance. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) characterization techniques confirmed the successful integration of HfO<sub>2</sub> into the Co<sub>3</sub>O<sub>4</sub> structure, resulting in an altered surface morphology and improved electronic conductivity. Electrochemical assessments demonstrate that the Co<sub>3</sub>O<sub>4</sub>/HfO<sub>2</sub> composite material exhibits exceptionally low overpotentials of 262 and 167 mV for the OER and HER, respectively, at a current density of 10 mA cm<sup>−2</sup>. These values significantly outperform those of unmodified Co<sub>3</sub>O<sub>4</sub>, which presents overpotentials exceeding 467 and 311 mV for the OER and HER, respectively. High mass activity and turnover frequency (TOF) values are observed for the Co<sub>3</sub>O<sub>4</sub>/HfO<sub>2</sub> composite, highlighting the catalyst's efficiency. This outstanding performance is attributed to enhanced charge transfer kinetics and optimized electronic interactions facilitated by the HfO<sub>2</sub> modification. Consequently, this study underscores the potential of the Co<sub>3</sub>O<sub>4</sub>/HfO<sub>2</sub> composite as a cost-effective and efficient electrocatalyst for water-splitting applications, reveal advancements in renewable energy technologies.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 6","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144255962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Construction of P2/T Biphasic Na0.44MnO2 Cathode Material Through Addition of Citric Acid for Sodium-Ion Batteries 添加柠檬酸制备钠离子电池用P2/T双相Na0.44MnO2正极材料
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2025-05-14 DOI: 10.1002/cnma.202500102
Yuanchao Li, Shixing Han, Pengchao Liang, Xiaokun Shang, Qi Li, Jingjing Ma, Songlin Wang, Li Yang, Guangri Xu
{"title":"Construction of P2/T Biphasic Na0.44MnO2 Cathode Material Through Addition of Citric Acid for Sodium-Ion Batteries","authors":"Yuanchao Li,&nbsp;Shixing Han,&nbsp;Pengchao Liang,&nbsp;Xiaokun Shang,&nbsp;Qi Li,&nbsp;Jingjing Ma,&nbsp;Songlin Wang,&nbsp;Li Yang,&nbsp;Guangri Xu","doi":"10.1002/cnma.202500102","DOIUrl":"https://doi.org/10.1002/cnma.202500102","url":null,"abstract":"<p>The Na<sub><i>x</i></sub>MnO<sub>2</sub> (<i>x</i> &lt; 0.44) material with a T-type tunnel phase shows excellent cycling performance, but low initial specific capacity. The Na<sub><i>x</i></sub>MnO<sub>2</sub> (<i>x</i> &gt; 0.6) with P2-type phase exhibits high initial specific capacity, yet poor cycling performance. Layer-tunnel hybrid materials has served as cathode materials for sodium-ion batteries (SIBs) due to the integration of high specific capacity and superior cycling performance. Herein, sodium manganite composites is synthesized with tunnel phase containing a small amount of P2-type layered phase in Na<sub>0.44</sub>MnO<sub>2</sub> materials using citric acid as the dispersant. The citric acid can promote the transition of the T-P2 phase and contribute to the uniform distribution of elements. The as-prepared Na<sub>0.44</sub>MnO<sub>2</sub> with layered-tunnel hybrid phase exhibits the best overall electrochemical performances with a capacity retention of 68% after 300 cycles at 1 C and an initial discharge capacity of 143.7 mA h g<sup>−1</sup>, due to combination of the advantages of layered and tunnel structure. This work provides a new strategy for synthesizing transition metal oxides with hybrid phase as the cathode of advanced SIBs.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144598330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Impact of Organic Precursors on the Optoelectronic Properties of As-Synthesized Carbon Dots 有机前驱体对as合成碳点光电性能的影响
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2025-05-12 DOI: 10.1002/cnma.202500082
Ashwini Nawade, Kumar Babu Busi, Kunchanapalli Ramya, Sabyasachi Chakrabortty, Sabyasachi Mukhopadhyay
{"title":"Impact of Organic Precursors on the Optoelectronic Properties of As-Synthesized Carbon Dots","authors":"Ashwini Nawade,&nbsp;Kumar Babu Busi,&nbsp;Kunchanapalli Ramya,&nbsp;Sabyasachi Chakrabortty,&nbsp;Sabyasachi Mukhopadhyay","doi":"10.1002/cnma.202500082","DOIUrl":"https://doi.org/10.1002/cnma.202500082","url":null,"abstract":"<p>Carbon dots (CDs), versatile carbon-based luminescent nanomaterials, offer environmental friendliness, cost-effectiveness, and tunable optical properties for diverse optoelectronic applications, including light-emitting diodes, photodetectors, and flexible electronics. These nanoscale materials exhibit unique optical behaviors like highly tunable photoluminescence and efficient multiphoton up-conversion. Herein, it explores how precursor selection influences CDs’ <i>sp</i><sup>2</sup>/<i>sp</i><sup>3</sup> hybridization ratios and their optoelectronic properties. CDs are synthesized from four distinct sources: polymeric polyvinylpyrrolidone, protein, biomass, and citric acid. Biomass- and protein-derived CDs display remarkable photocurrent enhancements under blue light, attributed to balanced <i>sp</i><sup>2</sup>/<i>sp</i><sup>3</sup> ratios, while polymer-derived CDs show limited optoelectronic response. These findings reveal the critical role of precursor composition in tailoring the structural and electronic properties of CDs, offering sustainable pathways for their application in advanced optoelectronic devices.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144598284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Continuous Flow Assisted Synthesis of SnO2–CdS Nano-Heterostructures with Enhanced Oxygen and Sulfur Vacancies for Hypersensitive Electrochemical Determination of Metronidazole 连续流辅助合成具有增强氧和硫空位的SnO2-CdS纳米异质结构用于甲硝唑的超敏电化学测定
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2025-05-11 DOI: 10.1002/cnma.202500048
Utsav Sengupta, Jit Satra, Muthaimanoj Periyasamy, Arik Kar
{"title":"Continuous Flow Assisted Synthesis of SnO2–CdS Nano-Heterostructures with Enhanced Oxygen and Sulfur Vacancies for Hypersensitive Electrochemical Determination of Metronidazole","authors":"Utsav Sengupta,&nbsp;Jit Satra,&nbsp;Muthaimanoj Periyasamy,&nbsp;Arik Kar","doi":"10.1002/cnma.202500048","DOIUrl":"https://doi.org/10.1002/cnma.202500048","url":null,"abstract":"<p>Aquatic pollution from pharmaceutical residues, particularly non-steroidal anti-inflammatory drugs (NSAIDs), poses serious ecological risks. Real-time monitoring of these pollutants is crucial for environmental sustainability. This study presents a highly sensitive electrochemical sensor based on ultrasmall SnO<sub>2</sub>–CdS heterostructured semiconductor nanocomposite for detecting the antibiotic metronidazole (MNZ), a NSAID. The sensor was developed via a simple and efficient continuous flow microreactor technology at a realistically low reaction temperature and exceptionally short period. Compared to individual SnO<sub>2</sub> and CdS, the heterostructure demonstrated superior electrocatalytic performance, attributed to the formation of oxygen and sulfur vacancies at the junction, enhancing diffusion and electro-reduction of the analyte. The outstanding performance of the sensor might also be related to the formation of a heterojunction between SnO<sub>2</sub> and CdS semiconductors, which led to improved electron conduction efficiency through the hybrid electronic structure. The sensor exhibited high sensitivity (0.7044 µA µM<sup>−1</sup> cm<sup>−2</sup>), excellent selectivity, a low detection limit (0.0008 µM), a wide linear range (0.01-1500 µM), and strong long-term stability. Its practical potential was confirmed through successful detection of MNZ in real samples like lake water and human urine.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 6","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microwave-Assisted Synthesis of Nickel Sulfide/Iron Sulfide (NiS2/Fe7S8) Rods for Oxygen Evolution Reaction 微波辅助合成出氧反应用硫化镍/硫化铁(NiS2/Fe7S8)棒
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2025-05-10 DOI: 10.1002/cnma.202500001
Shraddhanjali Senapati, Rajaram Bal, Bijayalaxmi Jena
{"title":"Microwave-Assisted Synthesis of Nickel Sulfide/Iron Sulfide (NiS2/Fe7S8) Rods for Oxygen Evolution Reaction","authors":"Shraddhanjali Senapati,&nbsp;Rajaram Bal,&nbsp;Bijayalaxmi Jena","doi":"10.1002/cnma.202500001","DOIUrl":"https://doi.org/10.1002/cnma.202500001","url":null,"abstract":"<p>Generation of hydrogen fuel from renewable sources like water via electrolysis is an effective process to produce it. For this process an efficient, inexpensive, and durable electrocatalyst is required for splitting of water molecules. Herein, a rod-shaped nickel sulfide/iron sulfide (NiS<sub>2</sub>/Fe<sub>7</sub>S<sub>8</sub>) electrocatalyst is fabricated for the water splitting reaction by the microwave method. NiS<sub>2</sub>/Fe<sub>7</sub>S<sub>8</sub> exhibits a very low overpotential of 250 and 300 mV at current densities of 25 mA cm<sup>−2</sup> (<i>η</i><sub>25</sub>) and 40 mA cm<sup>−2</sup> (<i>η</i><sub>40</sub>), respectively, and a Tafel slope value of 26 mV dec<sup>−1</sup> for oxygen evolution reaction in a basic electrolyte. It shows electrochemical stability of 45 h with low impedance and high electrochemical surface area.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144598254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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