光催化剂FePO_4降解罗丹明B染料的性能研究

FePO_4 photocatalyst and its photocatalytic performance in degradation of rhodamine B dyes

采用简便并流水热沉淀法制备了光催化剂FePO_4.利用紫外-可见漫反射等技术对其进行了一系列表征,结果表明,它的吸收边带约为450 nm,对可见光具有好的响应能力.利用420 nm以上的可见光,通过降解罗丹明B溶液,对FePO_4的光催化活性进行了测试,结果显示,FePO_4能使100 mL,4 mg/L的罗丹明B溶液于100 min内降解完全,且通过可见单色光的活性测试得知,FePO_4能光催化降解罗丹明B主要是因为FePO_4的催化作用.

A novel FePO_4 photocatalyst was prepared via a facile hydrothermal-precipitation method. The properties of the photocatalyst were characterized by UV-visible diffuse reflectance spectrum etc. The results show that its absorption band edge is about 450 nm. Besides,there is a good response to visible light. It only took 100 min to completely degrade 100 mL of rhodamine B dyes（0. 1 mol / L）under visible light irradiation（λ≥420 nm）,and by the photocatalytic activity of FePO4 under irradiation of monochromatic visible-light learn that the photocatalytic efficiency is owing to the intrinsic photocatalytic performance of FePO4 in degradation of rhodamine B dyes under visible-light irradiation.