Applied Catalysis B: Environment and Energy ( IF 20.2 ) Pub Date : 2023-03-06 , DOI: 10.1016/j.apcatb.2023.122584 Shuqu Zhang , Guanghua Hu , Meixue Chen , Bing Li , Weili Dai , Fang Deng , Lixia Yang , Jianping Zou , Shenglian Luo
Z-scheme Ag3PO4 @MoS2 photocatalyst was constructed by decorating MoS2 nanosheets on Ag3PO4 cubes for recovering hydrogen energy from antibiotic wastewater. Abundant oxygen vacancies (Vo) distributed along with Ag3PO4 cube surface are responsible for MoS2 lattice distortion by enabling 2 H phase MoS2 around Vo partially transform in 1 T phase. Free radicals trapping and theoretical calculation approve that Vo act as intermediate medium of charge transferring in Z-scheme Ag3PO4 @MoS2 system. On the strength of Vo and mixed phase of MoS2 providing more exposed active sites, superior conductivity and excellent stability, photocatalytic hydrogen recovery over Ag3PO4 @MoS2 is high up to 54.01 µmol·g−1·h−1 from norfloxacin wastewater (degradation efficiency: 88.36%). It is found that bandgap matching between antibiotics molecule and Ag3PO4 @MoS2 accounts for hydrogen recovery kinetics. H protons could be donated in the process of decyclopropylaton, dihydroxylation and demethylation for antibiotic degradation. This work presents new lines for seeking greater sustainability by managing antibiotics wastewater resource.
中文翻译:
界面氧空位调制 Ag3PO4 @MoS2 Z 型系统用于从抗生素废水中高效光催化回收氢
Z型Ag 3 PO 4 @MoS 2光催化剂是通过在Ag 3 PO 4立方体上装饰MoS 2纳米片构建的,用于从抗生素废水中回收氢能。沿Ag 3 PO 4立方体表面分布的大量氧空位(Vo)通过使Vo周围的2 H相MoS 2部分转变为1 T相而导致MoS 2晶格畸变。自由基捕获和理论计算证实Vo在Z型Ag 3 PO 4 @MoS 2中作为电荷转移的中间介质系统。凭借 Vo 的强度和 MoS 2的混合相提供更多暴露的活性位点、优异的导电性和出色的稳定性,Ag 3 PO 4 @MoS 2上的光催化氢回收率高达 54.01 µmol·g -1 ·h -1来自诺氟沙星废水(降解效率:88.36%)。发现抗生素分子与Ag 3 PO 4 @MoS 2之间的带隙匹配考虑氢回收动力学。H 质子可以在脱环丙基化、二羟基化和去甲基化过程中提供给抗生素降解。这项工作提出了通过管理抗生素废水资源寻求更大可持续性的新思路。