Efficient synthesis of polymeric g-C3N4 layered materials as novel efficient visible light driven photocatalysts
Efficient synthesis of polymeric g-C3N4 layered materials as novel efficient visible light driven photocatalysts
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DOI：
10.1039/c1jm12844b
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发表时间：
2011-01-01
影响因子：
--
通讯作者：
Lee, S. C.
中科院分区：
文献类型：
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作者：
Dong, Fan;Wu, Liwen;Lee, S. C.
为了开发用于环境应用的有效可见光驱动的光催化剂，具有高表面积的新型聚合物g-C3 N4层状材料首次通过在450和600摄氏度之间在空气中直接处理尿素而从含氧前体有效地合成，而无需模板的辅助。所制备的g-C3 N4材料具有较强的可见光吸收，其带隙约为2.7 eV。随着加热温度的升高，g-C_3 N_4的结晶度和比表面积同时增加。实验结果表明，该材料在可见光下的光催化活性明显高于C掺杂的TiO 2和由双氰胺制备的g-C3 N4材料。大的比表面积、层状结构和能带结构都有助于其高效的可见光光催化活性。g-C3 N4的高效合成方法结合高效的光催化活性对于环境污染物降解和大规模应用中的太阳能转化具有重要意义。
In order to develop efficient visible light driven photocatalysts for environmental applications, novel polymeric g-C3N4 layered materials with high surface areas are synthesized efficiently from an oxygen-containing precursor by directly treating urea in air between 450 and 600 degrees C, without the assistance of a template for the first time. The as-prepared g-C3N4 materials with strong visible light absorption have a band gap around 2.7 eV. The crystallinity and specific surface areas of g-C3N4 increases simultaneously when the heating temperatures increases. The g-C3N4 materials are demonstrated to exhibit much higher visible light photocatalytic activity than that of C-doped TiO2 and g-C3N4 prepared from dicyanamide for the degradation of aqueous RhB. The large surface areas, layered structure and band structure in all contributed to the efficient visible light photocatalytic activity. The efficient synthesis method for g-C3N4 combined with efficient photocatalytic activity is of significant interest for environmental pollutants degradation and solar energy conversion in large scale applications.