光催化剂FeAsO4降解罗丹明B染料的性能研究

摘要

A novel visible-light-responsive photocatalyst FeAsO4 was prepared by co-precipitation method.The results of UV -visible diffuse reflectance spectrum showed that it can absorb visible light of 400 ~500 nm.The photocatalytic activity of FeAsO4 was tested in degradation of rhodamine B dyes.The results demonstrated that it had high activity, it can completely degrade rhodamine B dyes in 40 ~50 min.The photocatalytic efficiency can be attributed to the combined effect of intrinsic photocatalytic performance of FeAsO4 and rhodamine B self-sensitization in the photocatalytic degradation process.%采用并流沉淀法制备了新型可见光催化剂 FeAsO4。通过紫外－可见漫反射光谱得知，它能吸收400～500 nm 之间的可见光。通过可见光光催化降解罗丹明 B 评价了该光催化剂的光催化活性，其结果表明，它具有高的光催化活性，能在40～50 min 内就将罗丹明 B 基本降解完全，这主要归因于在光催化降解过程中， FeAsO4的光催化与罗丹明 B 分子自身敏化的共同作用。