Effect of triethanolamine, n-octylamine, starch, polyethylene glycol and hexadecyltrimethylammonium bromide as template have been investigated on the formation of Bi₂O₃ prepared via sol gel method. The prepared catalysts were characterized using X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, Fourier transform infrared, UV–visible diffuse reflectance and Brunauer–Emmett–Teller techniques and subsequently used as photodegradation catalyst to purify contaminated water by Congo red and methylene blue as phenolic dyes. It was found that whereas Bi₂O_3-starch, Bi₂O_3-CTAB and Bi₂O_3-PEG have the most photodegradation effect on methylene blue under visible irradiation, Bi₂O_3-starch and Bi₂O_3-CTAB are the most active catalysts for Congo red under UV irradiation. In other word, the type of organic dyes, photocatalyst morphologies and templates are important factors on the photodegradation and adsorption phenomena.

研究了三乙醇胺，正辛胺，淀粉，聚乙二醇和十六烷基三甲基溴化铵作为模板剂对溶胶凝胶法制备Bi ₂ O _3的影响。制备的催化剂通过X射线衍射，扫描电子显微镜，能量色散X射线光谱，傅立叶变换红外光谱，UV-可见漫反射率和Brunauer-Emmett-Teller技术进行了表征，随后被用作光降解催化剂以净化刚果的污水红色和亚甲基蓝作为酚醛染料。发现Bi ₂ O _3-淀粉，Bi ₂ O _3-CTAB和Bi ₂ O _3-PEG在可见光下对亚甲基蓝的光降解作用最大，Bi ₂ O _3淀粉和Bi ₂ O _3-CTAB在紫外线下对刚果红的活性最高。换句话说，有机染料的类型，光催化剂的形态和模板是影响光降解和吸附现象的重要因素。