Graphite carbon nitride has become research hotspot in the field of photocatalysis and photocatalytic materials.Ultrasonic-freeze drying method was used to modify the bulk g-C3N4 which was prepared by high temperature pyrolysis,and g-C3N4nanosheets were prepared by this new method.The morphology,structure and energy band gap of catalysts were characterized by XRD,SEM,IR,BET and UV-Vis.Furthermore,the photocatalytic degradation of rhodamine B solution was performed under visible light irradiation.According to the results,the sample prepared by ultrasonic-freeze drying method showed higher photocatalytic degradation efficiency of rhodamine B,the degradation efficiency was 3.08 times as much as the bulk g-C3N4.Therefore,freeze drying likely played an important role in determining the optimization of catalyst structure and improvement of catalytic performance.
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基金资助
江苏省自然科学基金青年项目(BK20180178);徐州市科技计划项目(KC18010、KC19056);徐州工程学院校级科研项目(XKY2018226);徐州工程学院高等教育科学研究课题(YGJ1954)
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