講演情報
[15p-S4_202-2]Cu-doping Induces Sulfur Vacancies in SnS2 Nanosheets for Synergistic Antibiotic Degradation and CO2 Reduction
〇(B)PinHsuan Yeh1, JiaMao Chang1, YinHsuan Chang1, TingHan Lin2, MingChung Wu1,2 (1.Department of Chemical and Materials Engineering, Chang Gung Univ., 2.Center for Sustainability and Energy Technologies, Chang Gung Univ.)
キーワード：
SnS2 nanosheet、Photocatalytic CO2 reduction、Tetracycline degradation
Synergistic photocatalysis combining antibiotic photodegradation with CO2 photoreduction offers significant potential for simultaneously mitigating pollution and producing alternative energy. Considering the stepwise process of pollutant oxidation followed by CO2 reduction to fuels, the effective utilization of photogenerated electrons and holes by highly active photocatalysts is essential. Moreover, the efficient generation of abundant photo-induced carriers and the balancing of charge fluxes represent critical thresholds for achieving high chemical conversion efficiency. In this study, we propose an innovative strategy to construct sulfur-vacancy-modified SnS2 nanosheets by introducing transition metals via a hydrothermal method, designed to simultaneously couple tetracycline oxidation with CO2 reduction. In this material design, Cu is doped into SnS2 by substituting Sn sites, which promotes the formation of carriers and relevant sulfur vacancies, thereby extending optical absorption. Furthermore, this structural design increased the number of photogenerated carriers and active sites, collectively leading to significantly enhanced photocatalytic performance compared with pure SnS2. As a result, the optimized Cu-SnS2 catalyst achieved a tetracycline degradation efficiency exceeding 90% even after five consecutive cycles, while simultaneously driving CO2 reduction to CO. This work presents a promising strategy that integrates energy conversion with environmental remediation. Moreover, the findings not only deepen the understanding of structural modification in SnS2-based photocatalysts but also offer valuable guidance for the rational design of efficient photocatalytic systems.