期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 639, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2022.128358
关键词
Z-scheme heterojunction; Photocatalysis; Ti3C2 MXene; BiOIO3
资金
- National Key Research and Development Program of China [2018YFB0605002]
- Na-tional Natural Science Foundation of China [21546014, 50616114]
The newly designed BiOIO3/g-C3N4/Z-scheme Ti3C2 photocatalytic system exhibited excellent photocatalytic activity, and various characterization techniques were utilized to study its physicochemical properties, with the Z-scheme heterojunction and Ti3C2 co-catalyst playing key roles in boosting its performance.
The development of photocatalytic technology can not only reduce CO2 emissions, but also realize the effective utilization of solar energy, thus alleviating the global energy crisis. In this work, BiOIO3/g-C3N4 Z-scheme heterojunction modified by Ti3C2 nanosheets was designed and fabricated through hydrothermal method and electrostatic self-assembly strategy. The g-C3N4/BiOIO3/Ti3C2 (4 wt%) photocatalytic system exhibited the optimal photocatalytic efficiency, reaching 5.88 and 1.55 mu mol/g/h for CO and CH4, respectively, and the CO production rate was 6.6 folds as high as that of bare g-C3N4. Various characterization techniques were utilized to research the physicochemical properties of as-prepared photocatalysts. Z-scheme heterojunction formed between g-C3N4 and BiOIO3 and the decorating of 2D Ti3C2 co-catalyst were responsible for the boosted photocatalytic behavior. Z-scheme heterojunction could prevent the recombination of charge carriers, the co-catalyst Ti3C2 acted as electron sink could achieve quick shift of photo-induced electrons and supply numerous active sites for photocatalytic reaction.
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