Ionic liquid-assisted synthesis of ZnO and its application in landfill leachate degradation
Li Feiyu1, Zhang Yan1, Ji Yanpei1,2
1. School of Materials Science and Engineering, Henan Institute of Technology, Xinxiang 453003, China; 2. Xinxiang City Engineering Research Center for Wastewater Treatment Energy Saving and Emission Reduction, Xinxiang 453003, China
In order to efficiently degrade the COD content in landfill leachate, the ionic liquid BmimCl was used as a template agent, and nano-ZnO photocatalyst was synthesized by a microwave method. The crystal structure, morphology, and elemental composition of the synthesized product were characterized by XRD, SEM, and EDS. The ZnO catalyst was subsequently applied to the photocatalytic degradation of landfill leachate COD to evaluate its photocatalytic performance and cycling stability. The results show that the synthesized nano ZnO exhibits a pure hexagonal wurtzite structure with uniform granular morphology, belonging to an oxygen vacancy defect semiconductor material. The introduction of ionic liquid promotes the growth of ZnO grains, enhancing crystallinity and structural integrity. Photocatalytic experiments demonstrate that 0.1 g of the catalyst exhibits excellent degradation performance for landfill leachate diluted 10 fold (initial COD 1 580 mg/L, pH=7.8), achieving a COD removal efficiency of over 97% after 100 min of irradiation. After 3 consecutive cycles of reuse, the degradation efficiency remains above 95%, indicating good stability of the catalyst.
李飞宇1，张 焱1，姬燕培1,2. 离子液体辅助ZnO的制备及其对垃圾渗滤液的降解[J]. 煤炭与化工, 2026, 49(8): 152-155，160.
Li Feiyu1, Zhang Yan1, Ji Yanpei1,2. Ionic liquid-assisted synthesis of ZnO and its application in landfill leachate degradation. CCI, 2026, 49(8): 152-155，160.
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