首页|Photocatalytic ozonation-based degradation of phenol by ZnO-TiO2 nanocomposites in spinning disk reactor

Photocatalytic ozonation-based degradation of phenol by ZnO-TiO2 nanocomposites in spinning disk reactor

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Spinning disk reactor(SDR)has emerged as a novel process intensification photocatalytic reactor,and it has higher mass transfer efficiency and photon utilization for the degradation of toxic organic pollutants by advanced oxidation processes(AOPs).In this study,ZnO-TiO2 nanocomposites were prepared by sol-gel method,and coated on the disk of SDR by impregnation-pull-drying-calcination method.The per-formance of catalyst was characterized by X-ray diffraction,scanning electron microscope,X-ray photoelectron spectroscopy,photoluminescence and ultraviolet-visible diffuse reflectance spectroscopy.Photocatalytic ozonation in SDR was used to remove phenol,and various factors on degradation effect were studied in detail.The results showed that the rate of degradation and mineralization reached 100％and 83.4％under UV light irradiation after 50 min,compared with photocatalysis and ozonation,the removal rate increased by 69.3％and 34.7％,and mineralization rate increased by 56.7％and 62.9％,which indicated that the coupling of photocatalysis and ozonation had a synergistic effect.The radical capture experiments demonstrated that the active species such as photogenerated holes(h+),hydroxyl radicals(OH),superoxide radical(·O2-)were responsible for phenol degradation,and OH played a leading role in the degradation process,while h+and·O2-played a non-leading role.

Spinning disk reactorPhotocatalytic ozonationZnO-TiO2 nanocompositesAdvanced oxidation processes

Xueqing Ren、Jiahao Niu、Yan Li、Lei Li、Chao Zhang、Qiang Guo、Qiaoling Zhang、Weizhou Jiao

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Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering,School of Chemistry and Chemical Engineering,North University of China,Taiyuan 030051,China

Shanxi Sanqiang New Energy Technology Co.,Ltd,Taiyuan 030051,China

National Natural Science Foundation of ChinaFundamental Research Program of Shanxi ProvinceFundamental Research Program of Shanxi Province

2220832820210302124618202203021212134

2024

10.1016/j.cjche.2024.03.028

中国化学工程学报(英文版)
中国化工学会

中国化学工程学报(英文版)

CSTPCDEI
影响因子：0.818
ISSN：1004-9541
年,卷(期)：2024.72(8)