摘要
在十六烷基三甲基溴化铵(CTAB)作用下,采用水热合成法制备TiO 2/g-C 3N 4复合材料,研究CTAB对复合材料结构及光谱性质的影响。采用XRD、TEM、N 2吸附-脱附、FT-IR、UV-Vis DRS、PL等测试手段对材料进行表征,并在可见光下进行光催化降解偏二甲肼(UDMH)废水实验。结果表明:在CTAB作用下合成的TiO 2/g-C 3N 4复合材料晶型结构完整,TiO 2粒径更小并且在g-C 3N 4片层上均匀分布,具有较大的比表面积和丰富的介孔结构,复合材料的光吸收带边拓展至450nm,光生空穴-电子复合率明显降低。光催化实验表明,可见光条件下反应120min,UDMH的去除率达到了83.2%,相比未添加CTAB制备的TiO 2/g-C 3N 4提升了13.7%。
The TiO 2/g-C 3N 4 composites were prepared by the hydrothermal method with cetyltrimethyl ammonium bromide (CTAB). The influence of CTAB on the structural properties and spectral properties of the composites was studied. The samples were characterized by XRD, TEM, N 2 adsorption-desorption, FT-IR, UV-Vis DRS and PL, meanwhile, the samples were used to degrade unsymmetrical dimethyl hydrazine (UDMH) wastewater under visible light. The results show that the crystal structure of TiO 2/g-C 3N 4 composites assisted by CTAB is intact,with smaller particle size of nanoparticles and uniformly distributed on g-C 3N 4 sheets. The specific surface area of the composites increases and the mesoporous is more abundant, the adsorption ledge of the composites is expanded to 450nm, the recombination rate of hole-electron reduces obviously. Photocatalytic results show that the UDMH degradation efficiency of TiO 2/g-C 3N 4 (CTAB) reaches 83.2% in 120min, which is improved by 13.7% than that of the no CTAB-assisted composites.
作者
曾宝平
贾瑛
许国根
李明
冯锐
ZENG Bao-ping;JIA Ying;XU Guo-gen;LI Ming;FENG Rui(Rocket Force University of Engineering,Xi’an 710025,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2019年第9期139-144,共6页
Journal of Materials Engineering
基金
国家社会科学基金资助项目(16GJ003-148)
国家自然科学基金面上项目(21875281)
