期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 250, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seppur.2020.117174
关键词
CuWO4/g-C3N4; Self-doped; Fenton-like reaction; Wastewater treatment; Reaction mechanism
资金
- National Natural Science Foundation of China [51502305, 51402174]
- Key R&D project of Shandong Province (Public welfare projects) [2017GGX20126]
- Natural Science Foundation of Shandong Province of China [ZR2019BEM013, ZR2019MEM045]
In this work, novel Cu+ self-doped CuWO4/g-C3N4 composites were in situ synthesized through a simple hydrothermal method. The CuWO4 nanoparticles with the size of about 10 nm were dispersed uniformly on the surface of g-C3N4 nanosheets. The Fenton-like catalytic results showed that the 30 wt% CuWO4/g-C3N4 composite exhibited the best catalytic activity for the degradation of organic dyes. The enhanced Fenton-like catalytic activity could be ascribed to the promoted redox cycle of Cu+/Cu2+ in the presence of abundant Cu+ as well as the synergistic effect between CuWO4 and g-C3N4 in the CuWO4/g-C3N4 composites. In addition, the highly efficient catalysts could be used repeatedly to treat variety of organic pollutants in a wide pH range at room temperature without external energy input (light, electricity and ultrasound). The reactive species quenching experiments showed that singlet oxygen played the major role in the Fenton-like reaction for the degradation of organic dyes. Based on the above results, a possible reaction mechanism was proposed in the Cu+ self-doped CuWO4/g-C3N4/H2O2 system.
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