期刊
JOURNAL OF CATALYSIS
卷 345, 期 -, 页码 319-328出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2016.11.014
关键词
Photocatalytic; BBT-BMO; Z-scheme; Visible light; Sulfathiazole
资金
- National Natural Science Foundation of China [51572101, 21607047]
- Fundamental Research Funds for the Central Universities [2662014BQ061, 2015PY120, 2015PY047, 2016PY088]
A novel conjugated microporous poly(benzothiadiazole)-Bi2MoO6 (BBT-BMO) Z-scheme heterojunction was fabricated in situ through a facile palladium-catalyzed Sonogashira-Hagihara cross-coupling poly condensation of 4,7-dibromobenzo[c][1,2,5]thiadiazole and 1,3,5-triethynylbenzene on the surface of Bi2MoO6. Characterization results illuminated that BBT was stably coated on the surface of Bi2MoO6 nanosheets with the formation of C-O bonds. This novel BBT-BMO composite exhibited superior photo catalytic performance in both sulfathiazole degradation and Cr(VI) reduction compared with pure BBT and Bi2MoO6 in visible light. In line with systematic characterizations results, a reasonable photocatalytic mechanism based on direct Z-scheme heterojunction was proposed and further verified via (OH)-O-center dot determination. This Z-scheme heterojunction endowed it with improved visible light absorption, larger surface area, and greater electron-hole separation and thus efficiently enhanced the photocatalytic performance. This work provides new insight into the utilization of conjugated microporous polymers in photocatalysis and paves a new way to construct Z-scheme heterojunctions with enhanced photocatalytic performance via metal-free polymers modification. (C) 2016 Elsevier Inc. All rights reserved.
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