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TiO_2/g-C_3N_4复合物的制备及其光催化性能

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  • Key Words:二氧化钛;;石墨相氮化碳;;可见光;;光催化

  • Abstract:通过简单的水热法在石墨相氮化碳(g-C3N4)纳米片层上原位生成TiO_2纳米颗粒。制备出的TiO_2/g-C3N4纳米复合材料在可见光照射下光催化活性显著高于纯g-C3N4。当TiO_2负载量为30%(质量分数)时,反应40min即可降解97%的罗丹明B(RhB)。光生电子在TiO_2和g-C3N4界面间的传输使得光生载流子分离,光催化性能提高。提出TiO_2/g-C3N4复合材料在可见光照射条件下的光催化机理并通过实验进行了验证。结果表明,TiO_2/gC3N4反应体系中起氧化作用的是空穴(h+)和超氧自由基(·O-2)。

  • Volume:v.38;No.169

  • Issue:06

  • Translation or Not:no

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