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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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可循环使用的Sn-TiO2/聚噻吩纳米杂化材料用于可见光下降解有机污染物
DOI: 10.1016/S1872-2067(15)60944-5, PP. 1668-1678
Keywords: 锡,二氧化钛,聚噻吩,纳米杂化材料,硝基苯,孔雀绿,可见光,光催化,可循环使用性
Abstract:
？采用改进的溶胶-凝胶法在低温制备了Sn-TiO2/聚噻吩纳米杂化材料(SPNH),运用X射线衍射(XRD)、扫描电镜、X射线光电子能谱(XPS)、红外光谱(IR)、紫外-可见光漫反射光谱(UV-DRS)和BET比表面积分析对所制样品进行了表征.XRD结果证实聚噻吩(PTh)对TiO2晶相结构没有影响.IR和UV-DRS结果表明,在掺杂的金属氧化物与PTh的纳米杂化和结合过程中,PTh表面与金属氧化物之间存在相互作用(类似核壳结构).XPS结果显示,纳米杂化材料中存在Sn4+以及PTh与TiO2各自所含的元素.催化剂表面吸附污染物结果发现,SPNH的吸附容量高于Sn-TiO2纳米粒子(STN).在可见光下降解有机污染物硝基苯(NB)和孔雀绿(MG)的反应中,SPNH表现出比单纯STN更高的光催化活性和稳定性.由于STN上存在聚噻吩,使得样品表面吸附NB(24%)和MG(21%)的能力增加,从而导致更高的光催化收率.考察了该光催化剂在可见光下重复使用5次时的光催化活性,未见PTh的消耗和降解.这些高光催化活性的SPNH材料有望在工业水净化中用作光催化剂.
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