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OALib Journal期刊
ISSN: 2333-9721
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铁、碘共掺杂tio2纳米晶的制备和光催化性能
Keywords: 无机非金属材料,铁、碘共掺杂,纳米晶tio2,亚甲基蓝,光催化活性
Abstract:
？采用溶胶--凝胶法制备铁、碘单掺杂及共掺杂的纳米晶tio2光催化剂,用x射线衍射(xrd)、x射线光电子能谱(xps)和紫外可见(uv--vis)漫反射光谱对其进行表征,研究了其降解亚甲基蓝的光催化性能。结果表明,催化剂样品为锐钛矿相,平均粒径为7--15nm。掺杂使样品的光吸收性能显著改善。掺杂i引起样品的晶粒尺寸减小和光吸收范围的拓展,导致其光催化活性显著提高；对于共掺杂样品,随着fe掺杂量的增加,其光催化活性呈现先增加后减小的变化趋势,掺杂量为0.2%的光催化性能最好。根据fe引入后样品晶粒尺寸、光吸收性能及能带结构等因素的变化,对其光催化性能变化的机制进行了讨论。
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