Applied Catalysis B: Environment and Energy ( IF 20.2 ) Pub Date : 2020-03-12 , DOI: 10.1016/j.apcatb.2020.118882 Ranjit Bariki , Dibyananda Majhi , Krishnendu Das , Arjun Behera , B.G. Mishra
Construction of porous heterostructure photocatalyst material with improved surface and optoelectrical properties is a practical and effective strategy for mineralization of toxic organic pollutants and water splitting reaction under visible light irradiation. Herein, we have developed a facile hydrothermal route to prepare a series of novel UiO-66/CdIn2S4 heterojunction nanocomposite materials containing finely dispersed UiO-66 spherical nanoparticles (20-40 nm) anchored over high aspect ratio CdIn2S4 nanosheets. Comprehensive characterization of the UiO-66/CdIn2S4 nanocomposites revealed a hierarchical 3D microflower structure with enhanced surface reactive sites, better channelization of charge carriers, high resistance to charge recombination and a favorable band alignment between the two semiconductor components. The optimal photocatalyst (30UiO-66/CdIn2S4) showed improved photocatalytic efficiency towards triclosan degradation with rate constant (0.0094 min-1) twelve times higher than the pure CdIn2S4 (0.0007 min-1). The 30UiO-66/CdIn2S4 photocatalyst also exhibited higher H2 evolution rate (2.95 mmolg-1 h-1) with apparent conversion efficiency of 20.8%.
中文翻译:
具有花状3D微球的UiO-66 / CdIn 2 S 4纳米复合材料对三氯生水相净化和H 2演化的简便合成和光催化功效
构建具有改善的表面和光电性能的多孔异质结构光催化剂材料是在可见光照射下有毒有机污染物矿化和水分解反应的一种实用有效策略。本文中,我们已经开发出一种简便的水热路线,以制备一系列新型UiO-66 / CdIn 2 S 4异质结纳米复合材料,该材料包含细分散的UiO-66球形纳米颗粒(20-40 nm),固定在高纵横比CdIn 2 S 4纳米片上。UiO-66 / CdIn 2 S 4的全面表征纳米复合材料揭示了具有增强的表面反应位点,更好的电荷载流子通道,对电荷复合的高抗性以及两个半导体组件之间的良好能带排列的分层3D微型花结构。最佳光催化剂(30UiO-66 / CdIn 2 S 4)对三氯生降解表现出改善的光催化效率,其速率常数(0.0094 min -1)比纯CdIn 2 S 4(0.0007 min -1)高十二倍。30UiO-66 / CdIn 2 S 4光催化剂还表现出更高的H 2析出速率(2.95 mmolg -1 h -1)的转换效率为20.8%。