Formation of Hierarchical In2S3-CdIn2S4 Heterostructured Nanotubes for Efficient and Stable Visible Light CO2 Reduction
Formation of Hierarchical In2S3-CdIn2S4 Heterostructured Nanotubes for Efficient and Stable Visible Light CO2 Reduction
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DOI：
10.1021/jacs.7b10733
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发表时间：
2017-12-06
影响因子：
15
通讯作者：
Lou, Xiong Wen ''David''
中科院分区：
文献类型：
--
作者：
Wang, Sibo;Guan, Bu Yuan;Lou, Xiong Wen ''David''
我们展示了分层 In2S3-CdIn2S4 异质结构纳米管的合理设计和制造，作为可见光二氧化碳减排的高效稳定的光催化剂。这种新颖的自模板策略，包括顺序阴离子和阳离子交换反应，将两种不同的硫化物半导体集成到具有均匀界面接触和超薄二维（2D）纳米片亚基的分层管状杂化物中。因此，分级异质结构纳米管有利于光生载流子的分离和迁移，增强CO2分子的吸附和浓缩，并为表面氧化还原反应提供丰富的活性位点。受益于这些结构和组成特征，优化的分级In2S3-CdIn2S4纳米管在催化体系中不使用贵金属助催化剂，表现出卓越的CO2脱氧还原性能，具有高CO生成率（825 mu mol g(-1)）和可见光照射下出色的稳定性。
We demonstrate rational design and fabrication of hierarchical In2S3-CdIn2S4 heterostructured nanotubes as efficient and stable photocatalysts for visible light CO2 reduction. The novel self-templated strategy, including sequential anion- and cation-exchange reactions, integrates two distinct sulfide semiconductors into hierarchical tubular hybrids with homogeneous interfacial contacts and ultrathin two-dimensional (2D) nanosheet subunits. Accordingly, the hierarchical heterostructured nanotubes facilitate separation and migration of photo induced charge carriers, enhance the adsorption and concentration of CO2 molecules, and offer rich active sites for surface redox reactions. Benefiting from these structural and compositional features, the optimized hierarchical In2S3-CdIn2S4 nanotubes without employing noble metal cocatalysts in the catalytic system manifest remarkable performance for deoxygenative reduction of CO2 with high CO generation rate (825 mu mol g(-1)) and outstanding stability under visible light irradiation.