Metal–Organic Framework-Derived Tubular In 2 O 3 –C/CdIn 2 S 4 Heterojunction for Efficient Solar-Driven CO 2 Conversion

作者：Shuangchao Zhao, Keyan Li, Jiaming Wu, Jiaxing Zhang, Xiangyang Li, Xinwen Guo, Chunshan Song · 发表于：ACS Applied Materials & Interfaces · 年份：2021 · DOI：10.1021/acsami.1c16096 · 被引用次数：56 · 研究领域：Advanced Photocatalysis Techniques、Gas Sensing Nanomaterials and Sensors、Metal-Organic Frameworks: Synthesis and Applications

Realizing high-efficiency solar-driven CO 2 reduction to chemicals and fuels requires high-performance photocatalysts with high utilization efficiency of solar light, efficient charge separation and transfer, and robust adsorption capacity for CO 2 . In this work, a tubular In 2 O 3 –C/CdIn 2 S 4 (IOC/CIS) ternary heterojunction with an intimate interfacial contact was fabricated by pyrolysis of In-MIL-68 and subsequent solvothermal synthesis of CdIn 2 S 4 . The construction of a heterojunction promotes the separation and transfer efficiency of photogenerated carriers. The introduction of carbon not only accelerates the interfacial charge migration but also enhances light absorption and CO 2 adsorption. The resulting 5IOC/CIS sample presents a remarkably improved photocatalytic CO 2 reduction activity with a CO generation rate of 2432 μmol g –1 h –1, much higher than that of the In 2 O 3 /CdIn 2 S 4 (IO/CIS) heterojunction (1906 μmol g –1 h –1 ). Furthermore, the type II charge transfer mechanism of the heterojunction was confirmed by the electron paramagnetic resonance characterization. This work provides new insight into the design and preparation of a highly efficient hollow heterojunction for photocatalytic applications.