Citation: Shiqiao Zhou, Ye Wang, Kun Zhou, Dongyang Ba, Yanhui Ao, Peifang Wang. In-situ construction of Z-scheme g-C₃N₄/WO₃ composite with enhanced visible-light responsive performance for nitenpyram degradation[J]. Chinese Chemical Letters, ;2021, 32(7): 2179-2182. doi: 10.1016/j.cclet.2020.12.002 shu

In-situ construction of Z-scheme g-C₃N₄/WO₃ composite with enhanced visible-light responsive performance for nitenpyram degradation

Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China

andyao@hhu.edu.cn

Received Date: 10 August 2020
Revised Date: 28 October 2020
Accepted Date: 15 November 2020
Available Online: 4 December 2020

Figures(5)

Developing an excellent photocatalysis system to remove pesticides from water is an urgent problem in current environment purification field. Herein, a Z-scheme WO₃/g-C₃N₄ photocatalyst was prepared by a facile in-situ calcination method, and the photocatalytic activity was investigated for degradation of nitenpyram (NTP) under visible light. The optimal Z-scheme WO₃/g-C₃N₄ photocatalyst displayed the highest rate constant (0.036 min⁻¹), which is about 1.7 and 25 times higher than that of pure g-C₃N₄ and WO₃, respectively. The improvement of photocatalytic performance is attributed to fast transfer of photogenerated carriers in the Z-scheme structure, which are testified by electron spin resonance (ESR) experiments, photocurrent and electrochemical impedance spectra (EIS) measurements. Moreover, the effects of typical water environmental factors on the degradation NTP were systematically studied. And the possible degradation pathways of NTP were deduced by the intermediates detected by high-performance liquid chromatography-mass spectrometry (HPLC-MS). This work will not only contribute to understand the degradation mechanism of pesticides in real water environmental condition, but also promote the development of new technologies for pesticide pollution control as well as environmental remediation.
- Photocatalysis,
- Z-scheme,
- Nitenpyram,
- Photogenerated carriers,
- Environmental remediation
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沈阳化工大学材料科学与工程学院沈阳 110142

In-situ construction of Z-scheme g-C3N4/WO3 composite with enhanced visible-light responsive performance for nitenpyram degradation

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通讯作者: 陈斌, bchen63@163.com

In-situ construction of Z-scheme g-C₃N₄/WO₃ composite with enhanced visible-light responsive performance for nitenpyram degradation