ZnxCd1−xS for photocatalytic degradation of landfill leachate and its hydrogen production activity

ZHANG Teng; JIANG Zao; YANG Zheng-xin; XU Long-jun; LIU Cheng-lun

doi:10.19906/j.cnki.JFCT.2022027

Volume 50 Issue 10

Oct. 2022

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ZHANG Teng, JIANG Zao, YANG Zheng-xin, XU Long-jun, LIU Cheng-lun. ZnxCd1−xS for photocatalytic degradation of landfill leachate and its hydrogen production activity[J]. Journal of Fuel Chemistry and Technology, 2022, 50(10): 1299-1306. doi: 10.19906/j.cnki.JFCT.2022027

Citation:

ZHANG Teng, JIANG Zao, YANG Zheng-xin, XU Long-jun, LIU Cheng-lun. Zn_xCd_1−xS for photocatalytic degradation of landfill leachate and its hydrogen production activity[J]. Journal of Fuel Chemistry and Technology, 2022, 50(10): 1299-1306. doi: 10.19906/j.cnki.JFCT.2022027

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Zn_xCd_1−xS for photocatalytic degradation of landfill leachate and its hydrogen production activity

doi: 10.19906/j.cnki.JFCT.2022027

1.
State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
2.
School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China

Funds: The project was supported by the Innovative Talents Training Program for Chongqing Primary and Secondary School Students (CY210120).

Received Date: 2022-02-16
Accepted Date: 2022-04-08
Rev Recd Date: 2022-04-01

Available Online: 2022-04-27

Publish Date: 2022-10-31

Abstract

Abstract

Zn_xCd_1−xS solid solution photocatalysts with high photocatalytic activity were prepared by the coprecipitation method at room temperature. The optimum process conditions of Zn_xCd_1−xS photocatalyst for degradation of landfill leachate (LFL) under simulated light and the hydrogen production rate for decomposition of degraded LFL were investigated, including the effects of Zn atom content, the amount of photocatalyst and illumination time on COD removal efficiency and hydrogen production performance. Results show that Zn_xCd_1−xS exhibits the highest photocatalytic activity with Zn∶Cd = 1∶1. Moreover, when the concentration of Zn_0.5Cd_0.5S is 1.0 g/L, and reaction time is 3 h, the COD removal efficiency of LFL can be up to 30.85% at room temperature. At the same time, Zn_0.5Cd_0.5S was applied to decompose degraded LFL to produce hydrogen. When the input amount of Zn_0.5Cd_0.5S is 0.6 g/L and illumination time is 3 h, the maximum hydrogen production is 1533 µmol, and the H₂ production rate is 8312 µmol/(g·h). The hydrogen production obtained in this process is much higher than that of photocatalytic decomposition of pure water. After three recycles, the hydrogen production can still remain above 83% of the initial hydrogen production.
- Zn_xCd_1−xS,
- photocatalyst,
- landfill leachate,
- degradation,
- hydrogen production

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