Morphology and photocatalytic tetracycline degradation of g-C_(3)N_(4) optimized by the coal gangue  

作　　者：Kai Han Guohui Dong Ishaaq Saeed Tingting Dong Chenyang Xiao 

机构地区：[1]School of Environmental Science and Engineering,Shaanxi University of Science and Technology,Xi'an,710021,China

出　　处：《Chinese Journal of Structural Chemistry》2024年第2期38-48,共11页结构化学（英文）

基　　金：National Natural Science Foundation of China(Nos.21876104 and 21603109)

摘　　要：Coal gangue(CG),a solid waste from coal mining and processing,has raised concerns about its environmental impact.Graphitic carbon nitride(g-C_(3)N_(4))is promising for photocatalytic decomposition of organic pollutants,but its performance is hampered by its inherent defects.In this study,the compound of coal gangue and g-C_(3)N_(4)was formed by in-situ loading g-C_(3)N_(4)on the surface of coal gangue.After recombination,the morphology of g-C_(3)N_(4)changes from block structure to tremella nanosheet.This change not only increases the specific surface area of g-C_(3)N_(4),but also broadens the light absorption spectrum of g-C_(3)N_(4).Compared with original g-C_(3)N_(4),the photo-current of the complex in visible light is increased twice,and the tetracycline(TC)degradation rate is 2.1 times faster.The structure,optical properties,band structure,morphology and charge transfer mechanism of the composite were analyzed by a series of characterization techniques.It is found that coal gangue can promote the space charge transfer and separation of g-C_(3)N_(4),and the cyclic test compound has good activity stability.In this paper,a strategy of comprehensive utilization of coal gangue is proposed,which can not only reduce the envi-ronmental risk of coal gangue,but also provide carbon nitride(CN)based photocatalytic materials with superior photocatalytic properties.

关 键 词：Coal gangue g-C_(3)N_(4) TETRACYCLINE PHOTOCATALYTIC Adsorption sites 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学] O644.1[理学—化学]