ZnxCd1-xS PREPARED BY COPRECIPITATION METHOD AND ITS PHOTOCATALYTIC ACTIVITY

Jiang Zao; Wu Tingzeng; Xu Longjun; Liu Chenglun

doi:10.19912/j.0254-0096.tynxb.2020-0909

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (5) : 105-112. DOI: 10.19912/j.0254-0096.tynxb.2020-0909

Zn_xCd_1-_xS PREPARED BY COPRECIPITATION METHOD AND ITS PHOTOCATALYTIC ACTIVITY

Jiang Zao¹, Wu Tingzeng¹, Xu Longjun¹, Liu Chenglun^1,2

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Abstract

Zn_xCd_1-_xS solid solution photocatalysts with high photocatalytic activity were prepared by the coprecipitation one-step method at room temperature. The structural and optical properties of the as-prepared samples were characterized by XRD, SEM, XPS, BET, UV-VIS DRS and PL. Photocatalytic activity of the samples was evaluated via degrading the Rhodamine B solution under simulated sunlight. The results show that the visible light absorption threshold of Zn_xCd_1-_xS decreases with the increase of Zn, while the band gap increases gradually. Moreover, the granular Zn_xCd_1-_xS exhibits excellent photocatalytic activity for the degradation of Rhodamine B, and Zn_0.8Cd_0.2S has the best photocatalytic performance among the as-prepared samples. The degradation rate of Zn_0.8Cd_0.2S for Rhodamine B reaches 98% within 90 min, which is much higher than that of CdS and ZnS. After four recycles, the RhB degradation is still more than 75%. Compared with CdS, the specific surface area and pore volume of Zn_0.8Cd_0.2S increase to 154.6 m²/g and 0.40 cm³/g, respectively. The main reasons for the enhanced photocatalytic activity are the effective separation efficiency of photogenerated electron-hole pairs and the lower recombination rate.

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coprecipitation / Rhodamine B / degradation / Zn_xCd_1-_xS / photocatalytic activity

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Jiang Zao, Wu Tingzeng, Xu Longjun, Liu Chenglun. Zn_xCd_1-_xS PREPARED BY COPRECIPITATION METHOD AND ITS PHOTOCATALYTIC ACTIVITY[J]. Acta Energiae Solaris Sinica. 2022, 43(5): 105-112 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0909

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