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采用“Pickering”聚合法,制备了4种稀土掺杂纳米TiO_2并负载于氨基树脂微球的复合光催化材料,实现了对TiO_2的负载固定。应用Fe-SEM和UV-Vis漫散射光谱等手段表征了材料的微观形貌和光谱学性质。以气体甲醛作为污染物,分别在紫外灯和白炽灯下测试其光催化效能。结果发现,掺杂稀土并负载的复合光催化剂呈微球型,尺寸1~3μm,对甲醛气体分别有82%和75%的降解效率;400℃焙烘处理后,催化微球性能恶化;对比无稀土掺杂,TiO_2仅负载的样品,反应初期有降解甲醛的功能,后期光催化效能消失。表明掺杂稀土和固定TiO_2,能有效拓宽TiO_2的光响应范围,提升其应用性能。
Four kinds of composite photocatalytic materials doped with nano-TiO 2 and supported on amino resin microspheres were prepared by “Pickering” polymerization method, and the immobilization of TiO 2 was achieved. The microstructure and spectroscopic properties of the materials were characterized by means of Fe-SEM and UV-Vis diffuse scattering spectroscopy. Gas formaldehyde as a pollutant, respectively, under UV light and incandescent lamp test its photocatalytic efficiency. The results show that the composite photocatalyst doped with rare earth is microspherical with the size of 1 ~ 3μm, the degradation efficiency of formaldehyde gas is 82% and 75%, respectively. After 400 ℃ baking, the catalytic microsphere performance is deteriorated. No rare earth doped, TiO 2 only load the sample, the initial reaction of formaldehyde degradation function, late photocatalytic efficiency disappears. It shows that doping rare earth and fixed TiO_2 can effectively broaden the light response range of TiO_2 and enhance its application performance.