首页|Morphology and photocatalytic tetracycline degradation of g-C3N4 optimized by the coal gangue
Morphology and photocatalytic tetracycline degradation of g-C3N4 optimized by the coal gangue
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Coal gangue(CG),a solid waste from coal mining and processing,has raised concerns about its environmental impact.Graphitic carbon nitride(g-C3N4)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-C3N4 was formed by in-situ loading g-C3N4 on the surface of coal gangue.After recombination,the morphology of g-C3N4 changes from block structure to tremella nanosheet.This change not only increases the specific surface area of g-C3N4,but also broadens the light absorption spectrum of g-C3N4.Compared with original g-C3N4,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-C3N4,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.
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