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【目的】以无水乙醇和尿素为原料,通过一步热聚合法制备得具有特殊物化性能的碳掺杂g-C_3N_4光催化剂。【方法】通过X射线衍射(XRD)、紫外-可见漫反射光谱(UV-Vis DRS)、荧光光谱(PL)、N2吸附等手段对样品进行了表征分析。【结果】碳掺杂g-C_3N_4样品的可见光催化活性明显高于未改进g-C_3N_4,也高于用去离子水辅助改进的g-C_3N_4样品。【结论】可见光催化活性增强的原因可以归因于光吸收能力增强、比表面积和孔容增大和光生载流子复合率减小等因素的协同作用。提供了一种简易和环境友好的方法制备高活性有机光催化剂的新思路,为环境污染净化提供了一种高效降解的新材料。
【Objective】 Carbon-doped g-C_3N_4 photocatalysts with special physicochemical properties were prepared by one-step thermal polymerization using anhydrous ethanol and urea as raw materials. 【Method】 The samples were characterized by X-ray diffraction (XRD), UV-Vis DRS, fluorescence spectroscopy (PL) and N2 adsorption. 【Result】 The visible light photocatalytic activity of carbon-doped g-C_3N_4 samples was significantly higher than that of unmodified g-C_3N_4 and higher than that of de-ionized water-assisted g-C_3N_4 samples. 【Conclusion】 The reason for the increase of visible light catalytic activity can be attributed to the synergistic effect of enhanced light absorption capacity, increased specific surface area and pore volume, and decreased photo-carrier recombination rate. Provides a simple and environmentally friendly method for the preparation of highly active organic photocatalyst new ideas for the purification of the environment provides a highly efficient degradation of new materials.