Preparation and Properties of CdS/Spherical g-C3N4 n-n Heterojunction as a Visible-Light-Driven Photocatalyst for Tetracycline Degradation
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2020年第1期
论文作者：苏俊章 吴湘锋 ZHANG Chenxu 王惠 ZHANG Mi ZHANG Jiarui JIA Yunning CUI Yanan TONG Xin SHANG Jialu ZHANG Chenyu
文章页码：99 - 106
摘 要：The Cd S/spherical g-C3 N4 n-n heterojunction photocatalyst was fabricated via a solvothermal method. The tetracycline was used to characterize the photocatalytic properties of the as-developed hybrids. The photocatalytic degradation mechanism of the as-developed heterojunction photocatalyst was also analyzed. Research results show that Cd S nanoparticles are well dispersed in the surface layer of spherical g-C3 N4. Moreover, the mass ratio of Cd S to spherical g-C3 N4 will influence the photocatalytic activity of the asdeveloped composites, which shows the trend of first increasing and then decreasing as it increased. When the mass ratio is 7:1, in 25 min, the as-developed heterojunction shows 93.2 % of the maximum photocatalytic efficiency and still exhibits 83.6 % after 5 times cycle testing. Moreover, the as-developed hybrids can accelerate the electron transport and improve the separation efficiency of photo-generated carriers compared with pure samples. In addition, the holes and superoxide radicals are dominating active species during the photocatalytic degradation process.
苏俊章1,2，吴湘锋1，ZHANG Chenxu1，王惠1，ZHANG Mi1，ZHANG Jiarui1，JIA Yunning1，CUI Yanan1，TONG Xin1，SHANG Jialu1，ZHANG Chenyu1
1. School of Materials Science and Engineering, Hebei Provincial Key Laboratory of Traffic Engineering Materials, Shijiazhuang Tiedao University2. Tianjin Key Laboratory of Building Green Functional Materials, Tianjin Chengjian University
摘 要：The Cd S/spherical g-C3 N4 n-n heterojunction photocatalyst was fabricated via a solvothermal method. The tetracycline was used to characterize the photocatalytic properties of the as-developed hybrids. The photocatalytic degradation mechanism of the as-developed heterojunction photocatalyst was also analyzed. Research results show that Cd S nanoparticles are well dispersed in the surface layer of spherical g-C3 N4. Moreover, the mass ratio of Cd S to spherical g-C3 N4 will influence the photocatalytic activity of the asdeveloped composites, which shows the trend of first increasing and then decreasing as it increased. When the mass ratio is 7:1, in 25 min, the as-developed heterojunction shows 93.2 % of the maximum photocatalytic efficiency and still exhibits 83.6 % after 5 times cycle testing. Moreover, the as-developed hybrids can accelerate the electron transport and improve the separation efficiency of photo-generated carriers compared with pure samples. In addition, the holes and superoxide radicals are dominating active species during the photocatalytic degradation process.
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