引用本文:
罗沙, 刘守新. Gd掺杂TiO2/活性炭纤维复合材料的制备及表征[J]. 应用化学,
2011, 28(1): 66-71.
doi:
10.3724/SP.J.1095.2011.00078
Citation: LUO Sha, LIU Shouxin. Preparation and Characterization of Gadolinium-doped TiO2/Activated Carbon Fibre Composite[J]. Chinese Journal of Applied Chemistry, 2011, 28(1): 66-71. doi: 10.3724/SP.J.1095.2011.00078
Citation: LUO Sha, LIU Shouxin. Preparation and Characterization of Gadolinium-doped TiO2/Activated Carbon Fibre Composite[J]. Chinese Journal of Applied Chemistry, 2011, 28(1): 66-71. doi: 10.3724/SP.J.1095.2011.00078
Gd掺杂TiO2/活性炭纤维复合材料的制备及表征
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。
English
Preparation and Characterization of Gadolinium-doped TiO2/Activated Carbon Fibre Composite
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.
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Key words:
- titanium dioxide
- / activated carbon fibre
- / gadolinium-doped
- / photocatalysis
- / adsorption
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