School of Materials Science and Engineering, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, PR China.
Changzhou Institute of Industry Technology, Changzhou, Jiangsu 213164, PR China.
J Colloid Interface Sci. 2022 Feb 15;608(Pt 3):2549-2559. doi: 10.1016/j.jcis.2021.10.178. Epub 2021 Oct 31.
Heterojunction engineering has been regarded as a promising strategy to sufficiently utilizing photogenerated charge carriers, thus benefiting the improvement of photocatalytic performance. Herein, AgPO/WO S-scheme heterojunction was synthesized via a simple deposition-precipitation process, and its photocatalytic activity was evaluated by monitoring water splitting and pollutant degradation under visible light. As a result, AgPO/WO with optimized ratio photocatalyst showed enhanced photocatalytic activity in oxygen production (306.6 μmol·L·h) relative to pure AgPO (204.4 μmol·L·h). Additionally, it also exhibits rapid toxicity elimination efficiency over hexavalent chromium ions (Cr) and ciprofloxacin (CIP) with degrading rate of 72% and 83% within 30 min, respectively. According to a series characterization, a possible S-scheme photocatalytic mechanism of AgPO/WO was demonstrated in detail, which endowed the heterojunction with strong redox abilities to provide powerful diving force towards the photocatalytic reaction. This work presents an innovative perspective to construct AgPO-based S-scheme heterojunctions for boosting photocatalytic performance for various applications.
异质结工程被认为是充分利用光生载流子的一种很有前途的策略，从而有利于提高光催化性能。本文通过简单的沉积-沉淀法合成了 AgPO/WO S 型异质结，并通过监测可见光下水分解和污染物降解来评估其光催化活性。结果表明，具有最佳比例的 AgPO/WO 光催化剂在产氧方面表现出增强的光催化活性（306.6 μmol·L·h），相对于纯 AgPO（204.4 μmol·L·h）。此外，它还表现出对六价铬离子（Cr）和环丙沙星（CIP）的快速毒性消除效率，分别在 30 分钟内降解率达到 72%和 83%。根据一系列的表征，详细证明了 AgPO/WO 的 S 型光催化机理，这使异质结具有很强的氧化还原能力，为光催化反应提供了强大的驱动力。这项工作为构建基于 AgPO 的 S 型异质结以提高各种应用的光催化性能提供了新的视角。
