采用沉淀-研磨法制备了一系列不同WO3含量的WO3/ZnO复合光催化剂,应用N2物理吸附、X射线衍射、扫描电镜、傅里叶变换红外光谱、紫外-可见光谱和光致发光谱等手段对催化剂进行了表征,并以λ=365nm的紫外光为光源,评价了该催化剂光催化降解酸性橙Ⅱ的活性,考察了WO3的复合对WO3/ZnO样品光催化性能的影响.结果表明,当复合2%WO3,并于600℃焙烧时,所制备的WO3/ZnO催化剂活性最高,比纯ZnO的提高了约一倍.合适的煅烧温度可以提高催化剂结晶度,而WO3的复合可抑制ZnO晶粒的长大,提高催化剂比表面积和改善催化剂表面羟基数量,并可抑制光生电子与光生空穴的复合,从而显著提高其光催化脱色活性.
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