Journal
CHEMICAL ENGINEERING JOURNAL
Volume 349, Issue -, Pages 287-296Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.05.094
Keywords
ZnIn2S4; TiO2; Z scheme; Photocatalysis; Artificial photosynthesis
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Funding
- National Natural Science Foundation of China [21503281, 21571192]
- Fundamental Research Funds for the Central Universities
- South-Central University for Nationalities [CZP17071, CZT18018]
- Natural Science Foundation of South-Central University for Nationalities [YZZ14001, XTZ15016]
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Facing the requirement of modern industrial development, selective reduction of 4-nitroaniline (4-NA) into p-phenylenediamine (PPD) via a facile, economic and eco-friendly photocatalysis technique has attracted more and more attention in recent years. In this study, ZnIn2S4 (ZIS) nanosheets grew in-situ on the surface of TiO2 hollowspheres through a hydrothermal method and formed a direct Z-scheme heterojunction composite, which exhibited exceedingly better photocatalytic 4-NA reduction performance than bare ZIS and TiO2. Such enhancement was mainly attributed to the dissimilar dimensionalities, intimate contact, and matchable band edge positions between ZIS and TiO2 semiconductors. Moreover, the substantial mechanism for the photocatalytic reaction in the ZIS/TiO2 system was reasonably proposed. Inspired by recent applications of the Z-scheme heterostructured materials in solar energy conversion and artificial photosynthesis, this work would arouse an increasing interest in designing more Z-scheme photocatalyst systems with high efficiency and extensive applications.
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