Gd掺杂TiO2/活性炭纤维复合材料的制备及表征

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。

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

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.