2结果与讨论-有色金属科学与工程.DOC

花Pt/Bi2WO6微米可见光白 羽1，吴 榛1，刘仁月1，陈建钗1，余长林,2* (1江西理工大学冶金与化学工程学院，江西 赣州341000； 福州大学催化国家重点实验室，福州，350002) 摘要：利用热光化学沉积法合成了一系列1.5~2 μm的花状Pt/Bi2WO6微米晶。利用X射线衍射仪(XRD)N2物理吸附扫描电子显微镜(SEM)透射电子显微镜(TEM)紫外可见漫反射光谱(DRS)X射线光电子能谱(XPS)和傅里叶变换红外光谱(FT-IR)等手段进行表征。可见光照射下(λ＞420nm)光催化降解酸性橙Ⅱ的性能结果表明，这些花Pt/Bi2WO6复合微米在光催化反应具有优越的性能。此外，沉积1%的Pt纳米粒子，Bi2WO6的2.8倍沉积Pt纳米粒子对可见光的吸收，降低了电子e-）和空穴（h+）的复合促进了?OH自由基的产生，因此在很大程度上提高了光催化活性。此外，特殊Pt/Bi2WO6微米有利于分离和回收关键词：Bi2WO6；花；Pt纳米粒子；可见光 中图分类号： 文献标识码： 文章编号： Synthesis, characterization of flower-like Pt/Bi2WO6 microcrystals and their high visible light photocatalytic performance Bai Yu1,1, Liu Ren-yue1, Chen Jian-cai1, YU Chang-lin1,2* （1School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, , Ganzhou 341000; 2State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350002, PR China） Abstract: A series of 1.5～2 μm Pt/Bi2WO6 composite microflowers were synthesized by a hydrothermal synthesis combination with photo-deposition method. The as-synthesized microflowers were characterized by powder X-ray diffraction (XRD), N2-physical adsorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectra (DRS), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FT-IR).The photocatalytic performance of the catalysts was evaluated by the consecutive photocatalytic degradation of acid orange II dye under visible light (λ 420 nm) irradiation. The results showed that these hierarchical Pt/Bi2WO6 composite microflowers have superior texture property in aqueous photocatalytic reactions. Moreover, the deposition of optimal amount of 1% Pt brings about 2.8 times increase in activity. The deposited Pt NPs over Bi2WO6 nanosquares enhance the visible light absorption due to the surface plasmon resonance absorption, decrease the recombination rate of e-/h+ pairs and promote ·OH radicals production, hence largely boosting the photocatalytic