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通过沉积-沉淀法将Cu2O、Ag-AgBr负载在介孔γ-Al2O3(MA)上制备了等离子体诱导可见光催化剂Cu2O-Ag-AgBr/MA.研究了其在可见光照(λ>420 nm)下的催化性能.通过XRD、XPS和UV-vis吸收光谱的去卷积分析表明,表面银以Ag+和Ag0形式共存.结果表明,Cu2O-Ag-AgBr/MA对难降解有机物2-氯苯酚(2-CP)显示出很高的可见光催化去除效率.同时Cu2O的掺入,显著抑制了降解过程中Ag+的溶出.自由基捕获剂的影响实验表明,h+、O·-2和·OH是反应中最重要的活性物种.
Plasma-induced visible light Cu2O-Ag-AgBr / MA was prepared by depositing Cu2O and Ag-AgBr onto mesoporous γ-Al2O3 (MA) by deposition- precipitation method. The results of X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (UV-vis) spectroscopy show that the surface silver coexists with Ag + and AgO.The results show that Cu2O-Ag-AgBr / -CP) showed high catalytic efficiency of visible light removal.At the same time, the incorporation of Cu2O markedly inhibited the dissolution of Ag + during the degradation process.Experiments of free-radical scavengers showed that h +, O · -2 and · OH were the reaction The most important active species.