贵金属Pd沉积对BiOCl光催化性能影响研究  

Effects of Noble Pd Deposition on the Photocatalytic Performance of BiOCl

作　　者：欧阳振中[1] 周晚琴[2] 操芳芳[2] 余长林[2] 樊启哲[2] 

机构地区：[1]长沙环境保护职业技术学院,长沙410004 [2]江西理工大学冶金与化学工程学院,赣州341000

出　　处：《人工晶体学报》2015年第1期184-189,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(21067004;21263005);江西省高等学校科技落地计划项目(KJLD14046);江西省青年科学家培养项目(20122BCB23015);江西省自然科学基金青年科学基金计划(20133BAB21003)

摘　　要：利用光化学沉积法合成了一系列不同Pd含量(0.5%、1%、2%、4%)的Pd/BiOCl复合纳米片。利用X射线粉末衍射(XRD)、N2-物理吸附/脱附、扫描电镜(SEM)、透射电镜(TEM)、X射线光电子能谱(XPS)、紫外可见漫反射吸收光谱(UV-vis DRS)等物理化学手段对合成的Pd/BiOCl进行了表征。以模型污染物-染料酸性橙II为光催化降解对象,考察了该系列光催化剂在紫外光(λ=254 nm)和可见光下光催化降解酸性橙II的活性。表征结果显示,尺寸为2 nm左右的Pd纳米粒子沉积在BiOCl纳米片上没有引起催化剂的比表面积的明显变化,但是Pd纳米粒子能使催化剂具有一定的可见光吸收能力。活性测试表明,在紫外光下,当沉积2%的Pd纳米粒子时,BiOCl催化降解染料的活性提高了2.1倍,而在可见光下光催化活性提高了6.3倍。A series of Pd /BiOCl composite nanoplates with different Pd concentration（0. 5%,1%,2%,4%） were synthesized via photochemical deposition method. The prepared products were characterized by some physicochemical characterizations such as X-ray diffraction（XRD）,N2-physical adsorption /desorption,scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, X-ray photoelectron spectroscopy（XPS）,and UV-Vis diffuse reflectance spectroscopy（UV-vis DRS）. Acid orange II as model pollutants-dye was chosen for the object of photocatalytic degradation. The effects of this series of catalysts in degradation of acid orange II were evaluated under both UV light（λ = 254 nm）and visible light irradiation. The results show that about 2 nm Pd nanoparticles were successfully deposited over the BiOCl nanoplates. The specific surface area of the catalyst show no obvious variations due to the deposition of Pd nanoparticles. However, the UV-Vis DRS results indicate that Pd nanoparticles can enable the catalyst to exhibit slightly absorption ability to visible light. The activity texts demonstrat that the deposition optimum Pd nanoparticles with 2%（mass fraction） gives 2. 1 times increase in activity under UV light irradiation and 6. 3 times increase under visible light irradiation.

关 键 词：PD BiOCl 光催化 酸性橙Ⅱ 

分 类 号：TB321[一般工业技术—材料科学与工程] O643[理学—物理化学]