摘要
采用溶胶-凝胶法合成纳米ZnO,用碳酸铵溶液浸渍的方法对其进行N掺杂。利用X射线衍射仪,透射电子显微镜,X射线能谱仪,Fourier红外光谱仪,X射线光电子能谱仪,紫外-可见光谱仪对产物结构进行了表征,通过可见光催化降解甲基橙对N-ZnO的光催化活性进行了考察。结果表明:合成的ZnO颗粒大小在20～30 nm,N的掺杂没有改变ZnO的晶型,N在ZnO晶格中形成N—Zn—O键;N掺杂拓宽了ZnO的可见光吸收范围。N-ZnO作为光催化剂在可见光作用下能有效降解甲基橙,表现出较高的可见光催化活性。当(NH4)2CO3和ZnO的摩尔比为0.20时,N-ZnO的光催化性能最好。
Nano-particles of ZnO were prepared by a sol-gel method. N-doped ZnO composite was prepared by an impregnating method with ammonium carbonate as a N source. The structure of the product was characterized by X-ray diffractometer, transmission electron microscope, X-ray energy dispersive spectroscope, Fourier transform infrared spectroscope, X-ray photoelectron spectro- scope and ultraviolet-visible （UV-Vis） spectroscope, respectively. The photocatalytic activity of N-ZnO composite was investigated via the photocatalytic degradation of methyl origange. The results showed that the particle size of the as-prepared ZnO was 20-30 nm. The crystal structure of ZnO was not changed after N atom was doped. N atoms were incorporated in the bulk phase of ZnO as N--Zn---O linkages. The UV-Vis analysis showed that the N-doped increased the visible light absorbable range of ZnO. As a photocatalytic agent, N-ZnO composite had a better photocatalytic activity for visible light, and could degrade the methyl red effectively under sunlight. The N-ZnO exhibited a superior photocatalytic activity at a mole ratio of （NH4）2CO3 to ZnO of 0.20.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2012年第9期1300-1304,共5页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(20871042)资助项目
关键词
氧化锌
氮掺杂
甲基橙
溶胶–凝胶法
光催化活性
zinc oxide
N-doped
methyl orange
sol-gel method
photocatalitic activity
