Sambyal Shabnam, Sharma Rohit, Mandyal Parteek, Chauhan Vinay, Priye Aashish, Kumar Manish, Shandilya Pooja
School of Advanced Chemical Sciences, Shoolini University, Solan, HP 173229, India.
Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio 45221, United States.
ACS Omega. 2025 Jan 14;10(3):2472-2487. doi: 10.1021/acsomega.4c05403. eCollection 2025 Jan 28.
A dual S-scheme nanocellulose-based SnWO/CuO/AgWO (NC-SCA) heterojunction photocatalyst was synthesized via ultrasonication followed by a hydrothermal method for the efficient photodegradation of amoxicillin (AMX). Under UV-vis light irradiation, the NC-SCA photocatalyst exhibited an impressive 97.40% AMX degradation within 30 min, attributed to its improved optical absorption and superior charge migration. The characterization techniques, including XRD, FTIR, PL, and UV-vis spectroscopy, confirmed the successful integration of nanocellulose with SnWO/CuO/AgWO. XPS and ESR analyses provided insights into the S-scheme charge migration mechanism within the heterojunction. Further, the trapping experiments identified hydroxyl (OH) and superoxide radicals as the primary reactive species. The photocatalyst displayed a specific surface area of 115.9 m/g, offering a large active surface for photodegradation. Operational parameters such as the photocatalyst dosage, pH, and AMX concentration were systematically optimized. The NC-SCA photocatalyst exhibited high stability, retaining around 85% efficiency after seven cycles. This study presents an innovative strategy for designing high-performance photocatalysts addressing the limitations of conventional materials.
通过超声处理后采用水热法合成了一种基于双S型纳米纤维素的SnWO/CuO/AgWO（NC-SCA）异质结光催化剂，用于高效光降解阿莫西林（AMX）。在紫外-可见光照射下，NC-SCA光催化剂在30分钟内对AMX的降解率达到了令人印象深刻的97.40%，这归因于其改善的光吸收和优异的电荷迁移。包括XRD、FTIR、PL和紫外-可见光谱在内的表征技术证实了纳米纤维素与SnWO/CuO/AgWO的成功整合。XPS和ESR分析深入了解了异质结内的S型电荷迁移机制。此外，捕获实验确定羟基（OH）和超氧自由基是主要的活性物种。该光催化剂的比表面积为115.9 m/g，为光降解提供了较大的活性表面。系统地优化了光催化剂用量、pH值和AMX浓度等操作参数。NC-SCA光催化剂表现出高稳定性，经过七个循环后仍保持约85%的效率。本研究提出了一种创新策略，用于设计高性能光催化剂，以解决传统材料的局限性。
