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以钛酸异丙酯[Ti(OCHMe2)4],正硅酸四乙酯[Si(OEt)4],无水三氯化铝(AlCl3)为无机氧化物前驱体,无水乙醇为溶剂,非离子型三嵌段聚氧烯烃共聚物表面活性剂(P123)为模板剂,采用溶胶-凝胶法成功地合成了Al2O3掺杂的80TiO2.20SiO2介孔材料(1),其结构经UV和XRD表征。研究结果表明,1的介观结构具有良好的有序度;1骨架内的Al2O3为无定形;Al原子未进入锐钛矿晶格内。1对光的吸收主要在紫外区,带隙能2.95 eV～2.97 eV,且低于80TiO2.20SiO2的带隙能(3.22 eV)。在紫外光照射下,1分解H2S气体的活性得到了显著提高,且最高活性是80TiO2.20SiO2的3倍以上。
In this paper, titanic acid isopropyl ester [Ti (OCHMe2) 4], tetraethylorthosilicate [Si (OEt) 4] and anhydrous aluminum trichloride (AlCl3) Nonionic triblock polyoxyalkylene copolymer surfactant (P123) was used as template to successfully synthesize Al2O3-doped 80TiO2.20SiO2 mesoporous material (1) by sol-gel method. Its structure was characterized by UV and XRD characterization. The results show that mesophase structure of 1 has a good degree of order; Al 2 O 3 in the framework is amorphous; Al atoms do not enter the anatase lattice. 1 The absorption of light is mainly in the UV region with a bandgap energy of 2.95 eV ~ 2.97 eV and lower than the bandgap energy (3.22 eV) of 80TiO2.20SiO2. Under UV irradiation, H2S gas decomposition activity has been significantly improved, and the highest activity is 80TiO2.20SiO2 more than 3 times.