一步水热法制备N,S(F)共掺杂TiO_2纳米管及其可见光催化性能  

One-pot hydrothermal synthesis of N-(S,F) codoped titanium nanotubes and its visible light responsive photocatalytic properties

作　　者：王建业[1] 赵志换[1] 范济民[1] 朱力校[1] 

机构地区：[1]太原理工大学化学化工学院,山西太原030024

出　　处：《功能材料》2013年第10期1502-1506,共5页Journal of Functional Materials

基　　金：山西省自然科学基金青年基金资助项目(2008021015)

摘　　要：以尿素、硫脲和氟化铵为掺杂物,采用一步水热法制备可见光响应的不同非金属共掺杂TiO2纳米管(TiO2NT)。通过SEM、TEM、XRD、BET、FT-IR、UV-Vis DRS等对样品进行了表征,考察其吸附性能及在模拟太阳光下对甲基橙的降解活性。结果表明,在碱性条件下一步水热法制备的不同非金属共掺杂TiO2NT具有较大的比表面积(193.93 m2/g)和较小的带隙能(2.76eV),非金属共掺杂明显提高了可见光利用率。在可见光辐照下,硫脲掺杂TiO2纳米管(N,S-TiO2NT)复合材料的光催化性能最好,反应100min后甲基橙降解率可达87.4%,降解过程符合一级动力学方程。Different non-metal co-doped titanium dioxide nanotubes （TiO2NT） were preformed by one-pot hydrothermal synthesis with urea, thiourea and ammonium fluoride as dopant source respectively. The samples were characterized by SEM, TEM, XRD, BET, FT-IR, UV-Vis and DRS. The photo-catalytic activity under visible light was evaluated by photocatalytic degradation of methyl orange. The adsorption performance of catalyst to methyl orange was studied, and the relationship between nitrogen doping behavior and visible light photo-catalytic property was investigated by the experiment of degradation of methyl orange waste water. The re suits showed that nanotubular titania prepared by hydrothermal processing using different nonmetal elements as dopant in the strong alkaline solution had larger surface area （193. 93m^2/g） and lower band gap energy （2.76eV） than that of TiO2, and nonmetaldoping can activate its visible-light activity. Photo-catalytic degradation of methyl orange tests showed that the thiourea doped titania nanotubes （N, S-TiO2 NT） under the visible light had the best degradation rate, methyl orange degraded by 81.5% with illumination of 90 min. The reaction followed a first-order kinetics equation.

关 键 词：一步水热合成法 TIO2纳米管 非金属共掺杂 甲基橙 光催化降解 

分 类 号：O643[理学—物理化学]