期刊
CHEMICAL ENGINEERING JOURNAL
卷 431, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.134104
关键词
TiO2; Graphene oxide; Photodegradation; Mineral processing; Wastewater treatment
资金
- Open Foundation of State Key Laboratory of Mineral Processing [BGRIMM-KJSKL-2021-12]
- National Natural Science Foundation of China [51804188]
- Natural Science Foundation of Shandong Province [ZR2018BEE015]
- project Sustainable Process Integration Laboratory -SPIL - EU CZ Operational Programme Research and Development, Education, Priority1: Strengthening capacity for quality research [CZ.02.1.01/0.0/0.0/15_003/000045]
This study successfully prepared a TiO2/graphene (TiO2/G) composite photocatalytic material via the hydrothermal method. The TiO2/G nanocomposites showed a large specific surface area, small pore size, and low electron-hole pair complexation rate, resulting in efficient degradation of pollutants. By anchoring TiO2 on graphene oxide (GO), the photoresponse range of TiO2/G was broadened and its photocatalytic efficiency was significantly improved. This work is important for the development of photocatalytic systems for the treatment of mineral processing wastewater.
This study has invented a novel composite photocatalytic material of TiO2/graphene (TiO2/G) via the hydro thermal method. The prepared TiO2/graphene (TiO2/G) composite catalysts were investigated in detail using various characterisation experiments. The characterisation experiments indicated that the TiO2/graphene (TiO2/ G) nanocomposites were successfully prepared. It can be observed that the TiO2 nanoparticles were observed uniformly distributing on the graphene oxide (GO) and the prepared TiO2/graphene (TiO2/G) nanocomposites possess huge specific surface area, small pore size, and low electron-hole pair complexation rate to degrade the pollutants. For the first time, TiO2/G is used as a photocatalytic material to treat mineral processing wastewater. Compared to GO and TiO2, under simulated light irradiation, the photodegradation efficiency of 18% TiO2/G samples reached 97.03% after 100 min. By successfully anchoring TiO2 on GO, the photoresponse range of TiO2/G was broadened (from 200-380 nm to 200-800 nm). The activity was also further improved (after 100 min of simulated light, the photocatalytic efficiency of pure TiO2 was only 17.88%, and the photocatalytic efficiency of 18% TiO2/G was 5.43 times higher than that of pure TiO2). This work advances the development of a potential photo-, photoelectro-systems for the treatment of real mineral processing wastewater.
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