光还原Pt掺杂三维有序大孔ZrO_2复合材料的光降解与光解水制氢  

The Photocatalytic and Hydrogen Production of Pt-doped Three-dimensionally Ordered Macroporous Composite ZrO_2 by Photoreduction Method

作　　者：周黔龙 李莉[1,2,3] 杨长龙[1] 焦玉振 张鑫悦[2] 

机构地区：[1]齐齐哈尔大学材料科学与工程学院,黑龙江齐齐哈尔161006 [2]齐齐哈尔大学化学与化学工程学院,黑龙江齐齐哈尔161006 [3]黑龙江省高校精细化工重点实验室,黑龙江齐齐哈尔161006

出　　处：《分子催化》2017年第3期236-246,共11页Journal of Molecular Catalysis(China)

基　　金：国家自然科学基金(批准号:21376126);黑龙江省自然科学基金资助项目(批准号:B201106);黑龙江省教育厅科学技术研究项目(批准号:12511592);黑龙江省政府博士后资助经费(批准号:LBH-Z11108);黑龙江省政府博士后科研启动经费(批准号:LBHQ13172);齐齐哈尔大学大学生创新创业训练计划项目(批准号:201610221112)资助~~

摘　　要：采用胶晶模板技术结合光还原方法制备了Pt掺杂复合材料三维有序大孔Pt/ZrO_2(3DOM Pt/ZrO_2).通过X-射线衍射(XRD)、X-射线光电子能谱(XPS)、扫描电子显微镜(SEM)、紫外-可见漫反射吸收光谱(UV-Vis/DRS)和氮气吸附-脱附等测试方法对复合材料3DOM Pt/ZrO_2的晶相、组成、结构、形貌以及表面物理化学性质等进行表征.结果表明,Pt掺杂复合材料3DOM Pt/ZrO_2与单体ZrO_2的晶相相一致,其形貌呈现三维有序大孔结构,且孔结构排列整齐有序,孔壁为介孔结构.经光还原作用后该复合材料中Pt主要以单质形式存在,并且均匀分布在三维有序复合材料表面.同时,与单体ZrO_2相比,复合材料3DOM Pt/ZrO_2的BET比表面积显著增大,光吸收性能发生改变,在240~350 nm间呈现强吸收.另外,在多模式光降解实验中,3DOM Pt/ZrO_2的光活性明显增强.同时,其光解水制氢性能差不多是P25的2.5倍.In this paper, three-dimensionally ordered macroporous （3DOM） composite Pt/ZrO2 was prepared by the colloidal crystal template technology combined with photoreduction method. The composition, crystalline structure, morphology and surface physicochemical properties of 3DOM Pt/ZrO2 were characterized by X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS）, Scanning electron microscopy （SEM）, UV-visible diffuse reflectance （UV-vis/DRS）, and nitrogen adsorption-desorption testing methods. The results showed that 3DOM Pt/ZrO2 composite had the tetragonal phase of ZrO2, which exhibited a three-dimensionally ordered macroporous structure, whose pore structure was neat and orderly, and pore walls were the mesoporous structure. Pt mainly showed the elemental form in composite 3DOM Pt/ZrO2, which evenly distributed on the surface of the composite material. At the same time, compared with the monomer of ZrO2, the BET specific surface area of composite 3DOM Pt/ZrO2 was significantly increased, and the optical absorption was changed, strong absorption occured at 240~350 nm. Otherwise, in the multi-mode photocatalytic experiments, the photocatalytic activity of 3DOM Pt/ZrO2 obviously was enhanced; meanwhile, the hydrogen yield of the 3DOM Pt/ZrO2 composite was 2.5 times that of commercial P25, which also showed excellent photocatalytic activity.

关 键 词：聚苯乙烯 光还原 3DOM Pt/ZrO2 光催化 制氢 

分 类 号：O643.361[理学—物理化学]