中华医学超声杂志

应用化学 ›› 2011, Vol. 28 ›› Issue (01): 66-71.DOI: 10.3724/SP.J.1095.2011.00078

• 研究论文 • 上一篇    下一篇

Gd掺杂TiO2/活性炭纤维复合材料的制备及表征

罗沙,刘守新*   

  1. (东北林业大学材料科学与工程学院 哈尔滨 150040)
  • 收稿日期:2010-02-01 修回日期:2010-05-23 出版日期:2011-01-10 发布日期:2011-01-10
  • 通讯作者: 刘守新，教授; Tel:0451-82191204; E-mail:liushouxin@126.com; 研究方向：活性炭，光催化
  • 基金资助:
    国家自然科学基金(30771692)黑龙江省杰出青年基金(JC200801)资助项目

Preparation and Characterization of Gadolinium-doped TiO2/Activated Carbon Fibre Composite

LUO Sha, LIU Shouxin*   

  1. (College of Material Science and Engineering,Northeast Forestry University,Harbin 150040)
  • Received:2010-02-01 Revised:2010-05-23 Published:2011-01-10 Online:2011-01-10

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摘要：

以TiCl4和Gd(NO3)3·6H2O为主要原料，采用酸催化水解法制备Gd掺杂TiO2光催化剂并通过浸涂法将其负载在活性炭纤维(ACF)表面，制得Gd掺杂TiO2/ACF复合材料。 以气相苯为模型物，考察材料的光催化活性。 利用XRD、FTIR及GC-MS对催化剂的晶相结构、光谱特征等进行了表征。 结果表明，Gd掺杂能有效抑制TiO2的晶粒生长。 Gd掺杂量、浸涂次数影响TiO2/ACF光催化活性，Gd2O3掺杂质量分数为0.48%、浸涂2次的TiO2/ACF活性最高。 在苯光催化氧化后的Gd掺杂TiO2/ACF复合材料表面未发现醌类中间产物的存在。 Gd的掺入能减缓催化剂失活，光催化反应100 min后仍能表现出较高活性。

关键词: 二氧化钛, 活性炭纤维, Gd掺杂, 光催化, 吸附

Abstract:

Gadolinium-doped TiO2/activated carbon fibre composite(TG/ACF) was prepared from TiCl4 and Gd(NO3)3·6H2O by acid-catalyzed hydrolysis method, then it was loaded on active carbon fiber(ACF) surface by impregnation. The photocatalytic activity was evaluated by degradation of gaseous benzene. XRD, FTIR and GC-MS were used to characterize the obtained composite. The results showed that Gd-doping could inhibit the growth of TiO2 crystallite. The photocatalytic activity of gadolinium-doped TiO2/ACF was affected by the added amount of Gd and dip-coating times. When the mass fraction of doped-gadolinium was 0.48% and dip-coating for 2 times, the composite exhibited the highest photocatalytic activity for benzene removal. No quinine compound was detected on gadolinium-doped TiO2/ACF composite surface after photocatalytic oxidation of benzene. The doped-Gd could slow down the deactivation of the catalyst, and the catalyst remained high activity after 100 min of usage.

Key words: Titanium Dioxide, Activated Carbon Fibre, Gadolinium-doped, Photocatalysis, Adsorption

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