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采用酸化-乙醚法合成了H3ASW12O40(AsW),溶胶-凝胶法合成了一系列催化剂(TiO2,TiO2-AsW,TiO2-CeO2,TiO2-ZrO2、TiO2-ZrO2-AsW、TiO2-CeO2-AsW),并用红外光谱,差热-热重分析方法对其进行表征.以甲醇消除反应为模式反应评价催化剂在紫外光照下的光催化性能,考察了制备和反应条件对催化剂性能的影响.在体系流速为2 mL·min-1甲醇的初始浓度为11.7 g·m-3时,ZrO2掺杂量为0.15%时,TiO2-ZrO2(0.15%)复合催化剂光催化消除甲醇达97.6%.CeO2掺杂量为0.2%时,TiO2-CeO(20.2%)复合催化剂的光催化活性最好,甲醇消除率达到99.2%,均优于TiO(296.3%),达到国家大气污染物排放标准.对于三组分TiO2-CeO2(0.2%)-AsW(0.1%)和TiO2-ZrO(20.15%)-AsW(0.1%)复合催化剂在相同条件下催化相同浓度的甲醇时消除率分别为78.8%和86.6%.当初始浓度降为6.8 g.m-3,甲醇在TiO2-CeO(20.2%)复合催化剂上的消除率达到100%.图6,参13.
A series of catalysts (TiO2, TiO2-AsW, TiO2-CeO2, TiO2-ZrO2, TiO2-ZrO2-AsW and TiO2-CeO2-AsW) were synthesized by the acid- And characterized by FTIR, TG-DTA.The photocatalytic performance of the catalyst under UV light was evaluated by the reaction of methanol elimination as a mode reaction, and the influence of preparation and reaction conditions on the performance of the catalyst was investigated. When the system flow rate was When the initial concentration of methanol was 11.7 g · m-3 and the dosage of ZrO2 was 0.15%, the photocatalytic activity of TiO2-ZrO2 (0.15%) composite catalyst was 97.6% 0.2%, the photocatalytic activity of TiO2-CeO (20.2%) composite catalyst was the best, the methanol elimination rate was 99.2%, which was better than that of TiO 2 (296.3%), reaching the national air pollutant emission standards. When the catalytic activity of CeO2 (0.2%) - AsW (0.1%) and TiO2-ZrO (20.15%) - AsW (0.1%) composite catalyst catalyzed the same concentration of methanol under the same conditions, the elimination rates were 78.8% and 86.6% To 6.8 gm-3, and the elimination rate of methanol on TiO2-CeO (20.2%) composite catalyst reaches 100%.