期刊
CHEMOSPHERE
卷 229, 期 -, 页码 273-283出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2019.05.013
关键词
CuO@Cu/Ag/MWNTs/sponge; Polychlorodiphenyls; Phenol; Plasma; Dielectric barrier discharge
资金
- National Natural Science Foundation of China [21576237, 21876154]
- Zhejiang Provincial Natural Science Foundation of China [LR18B070001, LY18B060003]
In this study, a sponge modified by multi-walled carbon nanotubes (MWNTs) was used as sheet support for the adsorption of CuO@Cu and Ag nanowires to prepare a CuO@Cu/Ag/MWNTsisponge electrode. Similar to their use in a dielectric barrier discharge (DBD) reactor, the MWNTs changed the conductivity and water absorptivity of the modified electrode, whereas the CuO@Cu and Ag nanowires significantly enhanced the tip effect to increase discharge. The optimal ratio of the Ag:CuO@Cu nanowires was 5:3 at a total adsorbed concentration of 0.8 g L-1. Compared with CuO@Cu and Ag nanowires were separately adsorbed on the MWNTsisponge, and the CuO@Cu/Ag/MWNTs/sponges recorded higher current response, lower discharge inception voltage, and higher removal efficiency of phenol and 2,4,5trichlorobiphenyl (PCB29) through their degradation. The removal efficiency reached 100% within 30 min of the reaction for the degradation of phenol and 65.1% within 60 min of the reaction for the degradation of PCB29 at an input voltage of 30V. These results show that the CuO@CuMWNTs/sponge structure has significant potential for use in the DBD reactor to improve the discharge efficiency of the system and reduce energy consumption, and can be further extended to other types of plasma reactors. (C) 2019 Elsevier Ltd. All rights reserved.
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