摘要
以钛酸四丁酯(TBOT)为钛源,Fe(NO3)3为Fe3+掺杂源,通过两步反应制得Fe3+掺杂二氧化钛(Fe3+/TiO2)。甲基橙的太阳光催化降解实验结果表明,n(Fe3+)/n(Ti)为0.5%,焙烧温度450℃条件下制备的Fe3+/TiO2具有较高的光催化活性,150min后降解率达到81.7%,约为未掺杂TiO2的1.41倍。SEM测试表明,Fe3+/TiO2晶粒主要呈八面体形。XRD结果表明,Fe3+/TiO2为锐钛矿相,焙烧温度超过450℃时晶粒明显增大。紫外-可见漫反射吸收光谱显示,相比单纯TiO2,Fe3+/TiO2对可见光的响应显著增强。
Fe3＋ doped titanium dioxide （Fe3＋/TiO2 ）was prepared by two-step method, using tetrabutyl titanate （TBOT） as titanium source, Fe（NO3 ）3 solution as the Fe3＋ doping source. Experiments were carried out using methyl or- ange as the pollutant object to evaluate the photocatalytic activity of Fe3＋/TiO2 The results showed that the proper Fe3＋ doping amount was n （Fe3＋ ）/n（Ti） =0. 5% ,and calcination temperature was 450℃. After sunlight irradiation for 150min, the decolorization efficiency of methyl orange was 81.7% ,which is 1.41 times on undoped TiO2 under the same conditions. Fe3＋/TiO2was characterized using SEM, XRD, and UV-Vis DRS. The results indicated that Fe3＋/TiOe appeared with octa- hedral shape and anatase phase. When calcination temperature exceeded 450℃, the grain size increased distinctly. Compared with the pure TiO2, the characteristic absorption threshold of Fe3＋/TiO2 appeared obvious red shift.
出处
《化工新型材料》
CAS
CSCD
北大核心
2013年第11期121-123,共3页
New Chemical Materials
基金
国家自然科学基金(21001090)
