Pt/BiOCl纳米片的制备、表征及其光催化性能  

Preparation,characterization,and photocatalytic properties of Pt/BiOCl nanoplates

作　　者：余长林[1] 陈建钗[1,2] 操芳芳[1] 李鑫 樊启哲 YU Jimmy 魏龙福 

机构地区：[1]江西理工大学冶金与化学工程学院,江西赣州341000 [2]福建省光催化重点实验室-省部共建国家重点实验室培育基地(福州大学),福建福州350002 [3]香港中文大学化学系

出　　处：《催化学报》2013年第2期385-390,共6页

基　　金：国家自然科学基金(21067004;21263005);江西省自然科学基金(2010GZH0048);江西省教育厅科技基金(GJJ12344);江西省青年科学家培养项目(20122BCB23015)~~

摘　　要：采用光化学沉积法制备了一系列不同Pt含量的新型Pt/BiOCl纳米片光催化剂,运用N2物理吸附-脱附、X射线粉末衍射、扫描电镜、透射电镜、X射线光电子能谱、光致发光光谱、紫外-可见漫反射光谱等手段对Pt/BiOCl进行了表征,并以λ=254nm的紫外灯和钨灯为光源,考察了Pt含量对Pt/BiOCl光催化降解酸性橙II活性的影响.结果表明,沉积的Pt对BiOCl样品比表面积的影响不大,但可有效增强催化剂对可见光的吸收能力,显著抑制光生电子与空穴的复合.当Pt含量为1%~2%时,能大幅度提高紫外光下BiOCl催化降解染料的活性,并产生可见光活性.这是由于Pt/BiOCl具有一定的可见光吸收能力,产生了Pt纳米粒子的等离子体光催化作用.A series of novel Pt/BiOCl nanoplate photocatalysts were synthesized by a photodeposition method. The as-synthesized products were characterized by N2physical adsorption, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, photoluminescence (PL) emission spectroscopy, and UV-Vis diffuse reflectance spectroscopy (DRS).The photocatalytic activity of the samples was evaluated by photocatalytic degradation of acid orange II under both UV light (λ = 254 nm) and visible light irradiation. The N2physical adsorption test showed that the deposition of Pt nanoparticles could not produce obvious change in the specific surface area of the catalyst. The UV-Vis DRS results indicated that the presence of Pt nanoparticles couldeffectively increase the visible light absorption ability of Pt/BiOCl. The PL spectra indicated that Pt could effectively suppress the recombination of photogenerated hole-electron pairs of Pt/BiOCl. Activity tests showed that the deposition of Pt (1%–2%, mass fraction) greatly promotes the UV right photocatalytic activity. Pt also brought aboutan obvious visible light activity, which could be attributed to the visible light absorption and plasmon photocatalysis role of deposited Pt nanoparticles.

关 键 词：铂纳米粒子 铋氧氯 光催化 可见光 酸性橙II 

分 类 号：O643.36[理学—物理化学] TB383.1[理学—化学]