金属氧化物掺杂高岭土纳米 二氧化钛光催化复合材料研究

以高岭石为载体，以钛酸四丁酯为前驱体，采用溶胶-凝胶法制备金属氧化物掺杂高岭土纳米二氧化钛光催化复合材料。采用X射线衍射（XRD）、红外光谱（FT-IR）和拉曼光谱（Raman）对复合材料进行表征，并通过在紫外光下降解云母珠光工业废水来考察其光催化性能。研究了不同金属氧化物掺杂浓度对复合材料光催化活性的影响。实验结果表明：金属氧化物三氧化二铁、氧化锌掺杂使锐钛矿二氧化钛晶相特征衍射峰宽化，掺杂生成钛铁矿、红锌矿新相，影响锐钛矿二氧化钛结晶度。在紫外光下降解6 h，掺杂质量分数为0.5%的三氧化二铁对废水降解率为98.8%，掺杂质量分数为1.5%的氧化锌对其降解率为91.4%。

Study on metal oxide doped kaolinite nano TiO2 photocatalytic composite

Kaolinite nano metal oxide doped TiO₂ photocatalytic material was prepared by sol-gel method with kaolinite as supporter and tetrabutyl titanate as precursor.The composite materials were characterized by X-ray diffraction（XRD），in frared spectroscopy（FT-IR），and Raman spectroscopy（Raman）.And the photocatalysis of the composite was examined by mica pearlescent industrial wastewater under UV light irradiation.The effects of different metal oxides doping concentrations on the photocatalytic activity of the composite material were studied.Results showed that metal oxide Fe₂O₃ and ZnO doping made anatase TiO₂ crystal phase characteristic diffraction peak broadening，created ilmenite and zincite new phases and af- fected the degree of crystallinity of anatase TiO₂.Under UV light irradiation the industrial pearlescent mica wastewater de- graded 6 h，doping Fe₂O₃ with mass fraction of 0.5%，the degradation rate was 98.8%，and doping ZnO with mass fraction of 1.5%，degradation rate was 91.4%.