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论文类型：期刊论文

发表时间：2020-01-15

发表刊物：APPLIED SURFACE SCIENCE

收录刊物：EI、SCIE

卷号：500

ISSN号：0169-4332

关键字：Lithium cobalt oxide; Nitrogen doping; Water treatment; Rhodamine B wastewater; Reusability

摘要：Recycling the wasted lithium-ion batteries for environmental catalysis is promising to control pollution since the electrode materials usually contain metal oxides showing good catalytic activities. Herein, the LiCoO2 was synthesized and used to treat the simulated dye wastewater. In order to cope with the practical water pollution, the effects of rhodamine B (RhB) concentration, concomitant ions, solution pH, air blowing and reaction temperature were systematically investigated. The most important finding of this study is the in situ nitrogenization of the LiCoO2 via RhB degradation, which offered the reused material a much better activity than the fresh one due to the formation of more defect oxygen species, and the activity of the reused LiCoO2 became better and better with cycling runs. At the third time of usage, similar to 0% of RhB could be removed under the conditions of 0.2 g of catalyst, 50 mL of 5 mg.L-1 RhB solution and 30 degrees C whereas only similar to 60% of RhB was degraded over the fresh sample. The results of this study will also have scientific significance for the development of nitrogen-doped LiCoO2 in other application fields.