Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 599, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2020.124880
Keywords
BiOCl; CdS; Z-Scheme heterojunction; Photocatalytic activity; Mineralization
Categories
Funding
- National Natural Science Foundation of China [21777168]
- program of Science and Technology Department of Sichuan Province [2019YJ0457, 2017096]
- Project of Zigong City [2016HG06, 2018YYJC10]
- open program of Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province [CSPC201903]
- Graduate student Innovation Fund of Sichuan University of Science and Engineering [y2019026]
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In order to meet the needs of practical applications, it is indispensable to exploit novel Z-scheme-based heterojunctions with enhanced separation efficiency of photo-induced carries and photocatalytic activity. In this work, a series of Z-scheme CdS/BiOCl heterojunctions were synthesized by a facile hydrothermal method. The as-prepared samples were characterized by a series of analytic technique. The photocatalytic properties of the asprepared samples were evaluated using rhodamine B (RhB) as model pollutant. The results imply that the CdS/BiOCl heterojunctions exhibit much higher photocatalytic decay abilities than the bare BiOCl and CdS under simulated sunlight irradiation. The boosted photocatalytic activities can be ascribed to the Z-scheme of separation property of photo-generated electron-hole pairs. The capture experiments and electron spin-resonance (ESR) results certify that the h(+) and center dot O-2(-) radicals are the predominant active free species in the photocatalytic reaction system. In light of all the experimental results, we proposed a Z-scheme to elaborate the improved photocatalytic decontamination ability of CdS/BiOCl heterojunctions toward RhB.
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