摘要
以钛酸丁酯为前驱物、无水乙醇作溶剂、二乙醇胺作为抑制剂,采用溶胶-凝胶法制备TiO2溶胶,在NN3气流中直接进行热处理,制备一系列不同焙烧温度的淡黄色的掺氮纳米TiO2粉体。经XRD、UV-Vis和FTIR分析表明,实验制得的TiO2-xNx在350、400、450、500和550℃热处理3 h后仍为锐钛型;450℃保温3 h掺氮样品具有最佳的紫外-可见光响应,其吸收边红移至720 nm左右。罗丹明B的可见光降解实验及产物分析表明,掺氮样品具有良好的可见光催化活性。
In this paper, the TiO2-xNx nanoparticles were prepared by sintering in a NH3 atmosphere with tetrabutyl titanate as precursor, alcohol as solvent,diethanolamine as the depressor by the sol-gel method. The synthesized powders were characterized by XRD, FTIR and UV-Vis diffuse reflectance spectroscopy. The result showed that crystalline phase of the samples sintered at 350 ℃ , 400 ℃ , 450℃ , 500 ℃ and 550 ℃ are anatase. The UV-Vis diffuse response spectroscopy showed that all of the nitrogen-doped samples absorbd visible light obviously. The sample sintered at 450 ℃ exhibited a comparative excellent absorption , which has red-shifted well into visible region up to -720 nm. Experimental results and product analysis indicated TiO2-xNx nanopartieles had an effect on its visible light photocatalytic performance towards RhB degradation.
出处
《环境工程学报》
CAS
CSCD
北大核心
2009年第7期1228-1232,共5页
Chinese Journal of Environmental Engineering
基金
福建省青年科技人才创新项目(2005J029)
