Thin layer hydroxy-rich kaolinite(IK)is prepared through using saturated urea solution to change the thickness of kaolinite sheet,and then compounded with graphite phase carbon nitride(g-C3N4)to prepare IKCN successfully,a new photocatalytic material.It is found that the interfacial chemical bonds formed between thin kaolinite and g-C3N4 significantly increases the photocatalytic activity of IKCN in NO removal to 74％,which is twice that of pure g-C3N4.Stripping kaolinite exposes more inter-layer hydroxyl groups,which increase the probability of forming interfacial chemical bonds between g-C3N4 and kaolinite,and the concentration of carbon vacancies.Furthermore,the interfacial chemical bonds accelerate the separation and transfer of electrons,and the carbon vacancy enhances the oxygen adsorption ability on the catalyst surface.The synergistic effect between interfacial chemical bonds and carbon vacancies promotes the generation of reactive oxygen radicals,thereby improving the efficiency of IKCN in photocatalytic conversion to NO.
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