(SrTiO_3)_(1-x)(SrTaO_2N)_x固溶体的制备及光催化性能研究(英文)  

Preparation and Photocatalytic Characterization of (SrTiO_3)_(1-x)(SrTaO_2N)_x Solid Solution

作　　者：李瑞璞[1] 罗文俊[1] 李朝升[1,2,3] 于涛[1,3] 邹志刚[1,2,3] 

机构地区：[1]南京大学物理系环境材料与再生能源研究中心,南京210093 [2]南京大学材料系,南京210093 [3]南京大学固体微结构国家重点实验室,南京210093

出　　处：《无机化学学报》2010年第1期149-152,共4页Chinese Journal of Inorganic Chemistry

基　　金：Financial support from the National Natural Science Foundation of China(No 20528302);the Science and Technology Research Program of the Ministry of Education (MOE) of China (No.307012);the National Basic Research Program of China(973 Program, 2007CB613301, 2007CB613305);国家自然科学基金(No.20773064and50732004)资助项目

摘　　要：通过高温固相反应合成了N掺杂的SrTiO3和(SrTiO3)1-x(SrTaO2N)x固溶体,对其进行了X射线衍射,紫外可见吸收光谱,X射线光电子能谱分析和比表面积的表征。随x由0增大至0.4,固溶体带隙变窄,由3.2eV降至2.3eV,吸收光谱由紫外光区扩展到可见光区。在甲醇溶液(50mLCH3OH+220mLH2O)中进行了光催化分解水产生氢气的反应,在硝酸银溶液(270mL,0.01mol·L-1)中进行了光催化分解水产生氧气的反应,在可见光(λ>420nm)照射下,实现了可见光响应的光催化分解水。N-doped SrTiO3 and （SrTiO3）1-x（SrTaO2N）x were prepared by a thermal ammonolysis method. The samples were characterized by XRD, UV-Vis spectroscopy, XPS spectroscopy and low temperature nitrogen adsorptiondesorption. The unit cell edge length of（SrTiO3）1-x（SrTaO2N）x increases linearly and the band gaps reduce from 3.2 to 2.14 eV as x increases from 0 to 0.40. The photoeatalytic activities of the samples were investigated in an aqueous suspension system. Aqueous methanol solution（50 mL CH2OH＋220 mL H2O） for H2 evolution and aqueous silver nitrate solution （270 mL, 0.01 mol-L^-1） for O2 evolution were used as sacrificial reagents. The samples show photoeatalytie activities under visible light（λ〉420 nm） irradiation.

关 键 词：固相法 固溶体 可见光 分解水 

分 类 号：O643.3[理学—物理化学]