在钛酸四丁酯(TBOT)的溶胶--凝胶过程中, 掺杂Fe3+并加入表面活性剂十六烷基三甲基溴化铵(CTAB), 得到的Fe3+/TiO2复合粒子在吸收曲线的530 nm处产生了宽的强吸收峰, 并对Rhodamine B具有一定的光催化降解活性. 应用TEM, XRD, TG--DTA和UV--Vis等手段对复合粒子进行了表征. 结果表明, 掺杂的Fe3+进入纳米TiO2的晶格, 产生新的带宽(E g=1.37 eV), 从而改变了TiO2的光谱响应范围.
TiO2 composite nanoparticles were synthesized by adding iron salt and surfactant Cetyl trimethyl ammonium bromide (CTAB) into the sol-gel process of Tetrabutyl titanate (TBOT). The composite particles, whose absorption maximum was appeared in about 530nm, showed the photocatalytical activity toward Rhodamine B. The effect of Fe3+ mass on the structure and properties of composite materials was systematically studied. Some means such as TEM, XRD, TG-DTA and UV-Vis were used to character these particles. The results showed, that the Fe3+ iron was doped in the crystal lattice of TiO2 and the new bandwidth (Eg=1.37eV) was appeared. Because of that, the spectral response property of TiO2 composite materials was changed into visible light range.
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