摘要
以三聚氰胺为氮源,钛酸丁酯为钛源,采用溶胶-凝胶法制备g-C_3N_4/TiO_2复合光催化材料,通过XRD、FESEM、UV-Vis、激光粒度分析仪对样品进行表征,以光催化降解亚甲基蓝（MB）为探针反应,研究了复合比和焙烧温度对样品可见光催化性能的影响。结果表明,g-C_3N_4/TiO_2复合光催化剂为锐钛矿相和金红石相组成的混合晶型,TiO_2颗粒呈近球形分布于片层结构的石墨相C3N4表面,复合材料平均粒径2.17μm,粒度分布均匀,复合后样品的光吸收增强。当g-C_3N_4与TiO_2复合比1.0,焙烧温度450℃时,在32 W普通日光灯下g-C_3N_4/TiO_2对MB的降解率达到93.3%。
The g-C3N4/TiO2 composites were prepared by sol-gel method using melamine as nitrogen source and tetrabutyl titanate as titanium source. The samples were characterized by XRD, FESEM, UV-Vis and laser particle size analyzer. The influences of complex ratio and calcination temperature on the photocatalytic performance of the samples were studied with the photocatalytic degradation of methylene blue（MB） as a probe reaction. The results showed that g-C3N4/TiO2 composite photocatalyst is composed of mixed crystalline phases with anatase and rutile phase. The TiO2 particles are nearly spherical and are loaded on the lamellar structure of the graphite phase C3N4 surface. The average particle size of composites is 2.17μm. The light absorption of the composite samples is enhanced. When the composite mass ratio of g-C3N4 and TiO2 is 1.0 and the calcination temperature is 450℃ , the degradation rate of MB over g-C3N,/TiO2 is 93.3% under the irradiation of 32 watt fluorescent lamp.
出处
《中国陶瓷》
CAS
CSCD
北大核心
2018年第2期34-39,共6页
China Ceramics
基金
四川省教育厅自然科学基金(17ZB0227)
四川省大学生创新创业训练计划(201611360055)
