FePc/WO₃·H₂O复合材料的制备及光芬顿降解污染物

Preparation of FePc/WO₃·H₂O Nanomaterials and Photo-Fenton Degradation of Pollutants

采用水热法和机械搅拌法成功制备了酞菁铁(FePc)修饰的WO3·H2O复合材料(FePc/WO3·H2O,简称FPWH)。复合材料在光芬顿体系下对对乙酰氨基酚(APAP)的降解活性显示,随FePc含量增加,复合材料的活性呈现先提升再下降的趋势,其中FePc的最佳复合比例为5%,复合材料的催化活性得到明显提升,5%FPWH对APAP的降解活性比单组份WO3·H2O高14倍。紫外–可见漫反射光谱(DRS)、光致发光光谱(PL)、瞬态光电流响应(i-t测试)和电化学阻抗谱(EIS)测试结果显示,FePc的修饰不仅拓宽了材料的光响应范围,还降低了光生载流子的复合率,提高了光生载流子的迁移率,加强了载流子在材料表面的传输,使得更多的光生电子能够被H2O2消耗,进而提升了材料在光芬顿反应中的活性。

Iron phthalocyanine (FePc) modified WO3·H2O composite (FePc/WO3·H2O, FPWH) was successfully prepared by hydrothermal method and mechanical agitation method. The catalytic activity of the composites for the degradation of acetaminophen (APAP) in the photo-Fenton system showed that the activity of the composites increases first and then decreases with the increase of FePc content. And the optimal composite ratio of FePc is 5%, and the activity of the composites was significantly improved. The degradation activity of 5% FPWH on APAP was 14 times higher than that of single component WO3·H2O. The results of ultraviolet-visible diffuse reflectance spectroscopy (DRS), photoluminescence spectroscopy (PL), transient photocurrent response tests (i-t test), and electrochemical impedance spectroscopy (EIS) indicated that the modification of FePc not only broadened the photoresponse range of the material, but also reduced the carrier recombination rate, improved the carrier migration rate, enhanced the carrier transport on the surface of the material, and enabled more photogenerated electrons to be consumed by H2O2, thus improved the activity of the material in the photo-Fenton reaction.