期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 387, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2019.121713
关键词
Photocatalysis; Z-scheme; Nitenpyram; Neonicotinoids
资金
- Major Science and Technology Program for Water Pollution Control and Treatment [2017ZX07203002]
- National Science Funds for Creative Research Groups of China [51421006]
- Natural Science Foundation of China [51679063]
- World-Class Universities (Disciplines) and Characteristic Development Guidance Funds for the Central Universities
- National Natural Science Foundation of China [91647206]
- National Key Plan for Research and Development of China [2016YFC0502203]
- PAPD
A Z-scheme WO3/ZnIn2S4 photocatalyst was synthesized via a simple solvothermal method. Compared with pure WO3 and ZnIn2S4, photocatalytic experiments showed that these Z-scheme photocatalysts exhibited enhanced activity for the degradation of nitenpyram (NTP). The apparent rate constant (k) of NTP degradation on 50WZ (WO3/50 wt% Znln(2)S(4)) was 0.042 min(-1) (similar to 3.8 times higher than WO3 and similar to 2.5 times higher than ZnIn2S4). Photoluminescence (PL), photocurrent (PC), and electrochemical impedance spectroscopy (EIS) showed that the separation and transfer efficiency of photogenerated carriers in SOWZ was markedly enhanced, which was favorable for improving its photocatalytic activity. Active species capture experiments and electron spin resonance (ESR) measurements showed that superoxide radicals and holes were the main active species for NIP degradation, and they confirmed the formation of the Z-scheme structure. Furthermore, a possible NTP degradation pathway was deduced based on the results of high-performance liquid chromatography mass spectrometry (HPLC-MS).
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