采用沉积-沉淀法制备Au/TiO2催化剂,并用IR、TG-DTA、XRD、TEM、BET、FL、XPS、UV-vis DRS和PL等分析方法对其进行表征;测试和计算在甲醇的光催化消除反应中Au/TiO2催化剂的动力学参数;以低级醇类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.结果表明:Au质量分数为1%的Au/TiO2催化剂在200 ℃下活化4 h的光催化活性最佳,0.15 g催化剂可将初始浓度为7.0 g/m3、流速为12.5 mL/min的甲醇和初始浓度为2.14 g/m3、流速为5 mL/min的乙醇以及初始浓度为2.21 g/m3、流速为4 mL/min的正丙醇完全消除;得到的反应活化能Ea = 14.80 kJ/mol,拟合的曲线线性关系好(R = 0.981 1),符合一级动力学反应规律.
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