摘 要:以TiO2粉体和NaOH溶液为原料利用水热法合成TiO2纳米管,以不同浓度的氨水为氮源利用浸渍法合成N元素掺杂的TiO2纳米管(N-TiO2)。通过扫描电子显微镜(SEM)、X射线衍射仪(XRD)、紫外-可见漫反射光谱(UV-vis)等表征方法对所得产物进行表征。以甲基橙作为模型污染物,研究了N-TiO2纳米管在紫外光下光催化能力。实验结果表明,合成的TiO2纳米管为竹节状结构;N掺杂阻碍TiO2晶粒的增长,抑制锐钛矿向金红石的转变;氮元素的掺杂使得TiO2在可见光区有更强的吸收;N-TiO2纳米管光催化剂对环境污染物的降解能力最强,反应100 min降解率可达72.56%。关键词:TiO2纳米管;水热法;N掺杂;光催化性能;甲基橙8686
Synthesis and Properties of Nonmetal Doped TiO2 Nanotubes Abstract: With TiO2 powders and NaOH solution as raw materials, TiO2 nanotubes were prepared by hydrothermal method. With different concentrations of ammonia as nitrogen source, N doped TiO2 nanotubes (N–TiO2) were prepared by impregnation method. The samples were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), uv-vis diffuse reflection spectroscopy (UV-vis)。Methyl orange as model of pollutants, N–TiO2 nanotubes composite properties were studied under the ultraviolet photocatalytic abilities. The experimental results showed that TiO2 nanotubes performaned bamboo-like structure. N element blocked TiO2 nanotubes growth and inhibited anatase to rutile. Nitrogen doping made the TiO2 have stronger absorption in the visible area. The degradation of environmental pollutants of N–TiO2 was the best. The reaction of 100 min degradation rate could reach 72.56%.
Key Words: TiO2 nanotubes; Hydrothermal method; Nitrogen doping; Photocatalytic performance; Methyl orange
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