【作者】 高基伟； 申乾宏； 方明； 王平； 杨辉；

【Author】 Gao Jiwei, Shen Qianhong, Fang Ming, Wang Ping, Yang Hui (College of Materials and Chemical Engineering, Zhejiang University, Hanghzou,310027)

【机构】 浙江大学材化学院；

【摘要】 采用钛酸丁酯:水:无水乙醇:盐酸摩尔比为1:175:7．5:0．14的体系,以加热的溶胶-凝胶工艺,在不同的水浴温度下制备含有锐钛矿纳米晶的氧化钛溶胶。XRD和TEM显示,溶胶中均含有约200 nm的正方形锐钛矿纳米晶粒,但结晶均不完善,60℃制备样品结晶度最高。溶胶可在紫外光照下使罗丹明B褪色, 但褪色程度不同。60℃制备样品催化最彻底,30℃制备样品催化能力最弱,90℃制备样品居于其间;以RB在550nm处最高峰强度计算,样品相对于原始罗丹明B 溶液的催化效率分别为:97．60％、91．99％、62．35％。在溶胶的UV／vis测试中, 我们发现溶胶可利用近红外光线,尚未见到国内外有相关报道。更多还原

【Abstract】 TiO2 sol containing nanometer Anatase crystal was prepared, using Ti (OC4H9)4 as a precursor in excessive-water reaction system. TEM photo reveals he foursquare projection shape of the 200-nanometer crystals. The sols, with Anatase pattern in XRD spectrum, can directly photodegrade Rhodamine B under UV light in room temperature. The samples made at 30, 60, 90 degree centigrade respectively have a photodegrade ratio of 62. 35%, 97. 60%, 91.99% for Rhodamine B, which shows that sample made at 60 degree centigrade has the best photodegrade ability. We also firstly found that the sol can be Excitated by infrared rays.更多还原