氮掺杂对SrTiO_3光催化性能的影响  

Influence of nitrogen doping on photocatalytic properties of SrTiO_3

作　　者：吕露[1] 吴广文[1] 吴浩[1] 周耀华[1] 赵亮[1] 

机构地区：[1]武汉工程大学湖北省新型反应器与绿色化学工艺重点实验室,湖北武汉430073

出　　处：《工业催化》2012年第11期30-33,共4页Industrial Catalysis

摘　　要：以尿素为氮源,利用溶胶-凝胶法制备了掺氮的N-SrTiO3光催化剂。采用XRD、SEM和UV-Vis对N-SrTiO3的物相、形貌和吸光性能进行表征,以高压汞灯为光源,通过甲基橙脱色率考察催化剂活性。结果表明,氮元素的掺杂增强了SrTiO3在可见光区的吸收强度,当制备过程pH=3～4、n(N)∶n(Sr)=6∶1和焙烧温度800℃时,甲基橙溶液降解率达72.69%,未掺杂样品降解率为28.55%。A series of N-doped SrTiO3 photocatalysts were prepared by sol-gel method with urea as the nitrogen source. The properties of phase, morphology and absorbance of N-SrTiO3 photocatalysts were characterized by means of X-ray diffraction, scanning electron microscope, UV-Vis diffuse reflectance spectroscopy. Using high-pressure mercury lamp as the light source, photoeatalytie activity of the catalysts were evaluated by deeolorizing rate of methyl orange. The results showed that doping of nitrogen led to the increase of optical adsorption intensity in the visible-light region. Under the preparation condition of pH = 3 - 4, n （N） ： n （Sr） = 6： 1, and calcination temperature 800 ℃, degradation rate of methyl orange over N-doped SrTiO3 photocatalyst reached 72.69% ,while degradation rate over SrTiO3 photocatalyst was only 28.55%.

关 键 词：催化化学 氮掺杂 SRTIO3 光催化剂 光催化活性 降解 

分 类 号：O643.36[理学—物理化学] TQ426.94[理学—化学]