Gd掺杂TiO_2/活性炭纤维复合材料的制备及表征  

Preparation and Characterization of Gadolinium-doped TiO_2/Activated Carbon Fibre Composite

作　　者：罗沙[1] 刘守新[1] 

机构地区：[1]东北林业大学材料科学与工程学院,哈尔滨150040

出　　处：《应用化学》2011年第1期66-71,共6页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(30771692);黑龙江省杰出青年基金(JC200801)资助项目

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100min后仍能表现出较高活性。Gadolinium-doped TiO2/activated carbon fibre composite（TG/ACF） was prepared from TiCl4 and Gd（NO3） 3·6H2 O 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.

关 键 词：二氧化钛 活性炭纤维 GD掺杂 光催化 吸附 

分 类 号：O643[理学—物理化学]