催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (10): 1058-1062.

• 研究论文 • 上一篇    下一篇

ZnO纳米管的光学性质及其对甲基橙降解的光催化活性

李长全 1,2, 罗来涛 2, 熊光伟 2   

  1. 1 南昌大学材料科学与工程学院, 江西南昌 330031 2 南昌大学应用化学研究所, 江西南昌 330031
  • 收稿日期:2009-10-25 出版日期:2009-10-25 发布日期:2013-06-06

Optical Properties of ZnO Nanotubes and Their Photocatalytic Activity for Degradation of Methyl Orange

LI Changquan1,2, LUO Laitao2,*, XIONG Guangwei2   

  1. 1School of Material Science and Engineering, Nanchang University, Nanchang 330031, Jiangxi, China 2Institute of Applied Chemistry, Nanchang University, Nanchang 330031, Jiangxi, China
  • Received:2009-10-25 Online:2009-10-25 Published:2013-06-06

PDF

1274

被引次数

70

摘要： 以十二烷基硫酸钠为模板剂采用水热法合成了 ZnO 纳米管, 以尿素和 ZnSO4 为原料制备了 ZnO 纳米颗粒, 并应用透射电镜、X 射线衍射、光致发射光谱、拉曼光谱、比表面积测定、傅里叶红外光谱和紫外-可见漫反射光谱等技术对样品进行了表征. 结果表明, ZnO 纳米管的比表面积较大, 在 λ ≈ 650 nm 的可见光波段 ZnO 纳米管开始出现吸收峰, 而 ZnO 纳米颗粒在可见光波段几乎没有吸收. ZnO 纳米管和纳米颗粒在紫外光照射下均对甲基橙有降解作用, 其中 ZnO 纳米管的光催化活性较高. 随着催化剂用量的增加和光照时间的延长, 甲基橙降解率逐渐提高; 甲基橙浓度的增大使甲基橙降解率降低.

关键词: 氧化锌, 纳米管, 纳米颗粒, 甲基橙, 降解, 光催化活性

Abstract: ZnO nanotubes were synthesized by the hydrothermal method using sodium dodecyl sulfate as the template, and ZnO nanopartides were prepared with urea and ZnSO4 as raw materials. The optical properties and photocatalytic activity of ZnO nanotubes and nanoparticles were studied, and the samples were characterized by transmission electron microscopy, X-ray diffraction, photoluminescence spectroscopy, Raman spectroscopy, specific surface area determination, Fourier transform infrared spectroscopy, and ultraviolet-visual diffuse reflection spectroscopy. The ZnO nanotubes had larger specific surface area than the ZnO nanoparticles. The absorption peak of ZnO nanotubes began to appear at λ ≈ 650 nm, but the ZnO nanoparticles nearly had no absorptive capacity in the visible band. ZnO nanotubes and nanoparticles can degradate methyl orange under ultraviolet light, and the catalytic activity of ZnO nanotubes was greater than that of ZnO nanoparticles. With the increase in the catalyst amount and illumination time, the degradation rate of methyl orange increased. Increasing the methyl orange concentration reduced the degradation rate.

Key words: zinc oxide, nanotube, nanoparticle, methyl orange, degradation, photocatalytic activity