N, S co-doped-TiO2/fly ash beads composite material and visible light photocatalytic activity
N, S co-doped-TiO2/fly ash beads composite material and visible light photocatalytic activity
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N、S共掺杂-TiO2/粉煤灰微珠复合材料及其可见光光催化活性
DOI：
10.1016/j.apsusc.2013.07.086
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发表时间：
2013-11-01
影响因子：
6.7
通讯作者：
Wu, Yucheng
中科院分区：
文献类型：
--
作者：
Lv, Jun;Sheng, Tong;Wu, Yucheng
以TiCl4为钛源，尿素为沉淀剂，采用水解沉淀法制备了纳米TiO2/粉煤灰微珠复合材料。以(NH2)(2)CO和(NH2)(2)SC分别为N源和S源,按一定比例研磨并在500℃下煅烧2h制备了N、S共掺杂TiO2/粉煤灰微珠复合材料。采用SEM、EDS、XPS、紫外-可见分光光度计等方法对复合材料进行了表征。紫外-可见吸收光谱结果表明，未掺杂复合材料的吸收边为390 nm，而掺杂复合材料的吸收边红移至500 nm。通过可见光照射（卤素灯，250 W）下甲基橙的降解来评价复合材料的光催化活性。结果表明，辐照1 h后，N、S共掺杂TiO2/粉煤灰微珠复合材料的降解率可达65%，而未掺杂样品和P25的降解率分别仅为10%和6%。该复合材料还表现出优异的回收性能。 (C) 2013 Elsevier B.V. 保留所有权利。
Using TiCl4 as the titanium source, urea as the precipitating agent, nano-TiO2/fly ash beads composite materials were prepared by hydrolysis-precipitation method. Using (NH2)(2)CO and (NH2)(2)SC as the N and S source respectively, N and S co-doped TiO2/fly ash beads composite materials were prepared by grinding them together according to a certain proportion and calcined at 500 degrees C for 2 h. The composite materials were characterized by SEM, EDS, XPS, and UV-vis spectrophotometer methods. The UV-vis absorption spectra results show that the absorption edge of un-doped composites is 390 nm while that of doped composites red-shifts to 500 nm. The photocatalytic activity of composite materials was evaluated by degradation of methyl orange under visible light irradiation (halogen lamp, 250 W). The results showed that after irradiation for 1 h, degradation rate of N, S co-doped-TiO2/fly ash beads composite material can reach 65%, while the degradation rate of un-doped sample and P25 were just 10% and 6%, respectively. The composite material also showed excellent recycling properties. (C) 2013 Elsevier B. V. All rights reserved.