期刊
CHEMICAL ENGINEERING JOURNAL
卷 429, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.132588
关键词
Layered heterojunction; Dual-internal electric field; Separated redox sites; Photocatalytic sterilization; P-doped MoS2; g-C3N4
资金
- National Natural Science Foundation of China [51871078, 52071119, 42076043]
- Heilongjiang Science Foundation [LH2020B006]
The research presents a novel method of synthesizing phosphorus-doped MoS2/g-C3N4 layered composite for enhanced photocatalytic efficiency. The composite shows high photocatalytic sterilization efficiency and offers a promising material for effective photocatalytic sterilization.
The construction of internal electric field (IEF) is usually considered an effective strategy to enhance photocatalytic efficiency because of its significant role in photo-induced carrier separation. Herein, we report a novel method to synthesize phosphorus-doped (P-doped) MoS2/g-C3N4 layer-by-layer composite, which could expose more active sites and generate a strong interaction by forming Mo-N bonds for photocatalytic sterilization. It is experimentally and theoretically confirmed that P-doped MoS2/g-C3N4 heterojunctions not only generate a dualIEF to drive charge migration, but also facilitate spatially separated redox sites to further promote the separation of photo-induced carrier. The optimized P-doped MoS2/g-C3N4 layered heterojunction exhibits high photocatalytic sterilization efficiency (99.99%) towards E. coli under visible-light irradiation, which is remarkably higher compared with those of P-doped g-C3N4 (44.73%) and P-doped MoS2 (61.69%), respectively. This research will offer a novel method of designing and synthesizing layered composite photocatalyst with a dual-IEF for effective photocatalytic sterilization.
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