硅酸盐学报

碳纳米管改性铁酸铋光催化还原CO_2合成甲醇

作者：李鑫何世育李忠

单位：华南农业大学理学院华南理工大学化学化工学院广东省绿色化学产品技术重点实验室

关键词：溶胶-凝胶二氧化碳光催化还原铁酸铋

分类号：TB383.1

出版年,卷(期):页码：2009,37(11):1869-1872

DOI：

摘要：

以溶胶-凝胶法制备了BiFeO3和BiFeO3/单壁碳纳米管(single-walled carbon nanotubes,SWCNTs)复合粉末。并分别用X射线衍射、紫外和可见光谱及气相色谱分析表征了催化剂的结构、可见光响应性能及催化活性,讨论了碳纳米管改性对催化剂可见光响应性及光催化活性的影响。结果表明:BiFeO3和BiFeO3/SWCNTs均具有较好的可见光响应性及催化活性,碳纳米管的加入不仅可以明显强化铁酸铋的紫外及可见光响应性能,同时可以使BiFeO3光催化还原CO2合成甲醇的性能增加1倍,单位质量BiFeO3/SWCNTs光催化还原CO2合成甲醇的累积产率最高可以在4～6h达到1000μmol/g。

BiFeO3 and BiFeO3/single-walled carbon nanotubes(SWCNTs) were prepared by the sol-gel method.The structure and response of visible light and catalytic activities of the catalysts were respectively examined through X-ray diffraction,ultraviolet-visible spectrophotometry and gas chromatography.The modification of the catalysts by single-walled carbon nanotubes not only greatly improved the response to visible light,but also doubled the catalytic reduction yield of CO2.The methanol yield synthesized by the catalytic reduction of CO2 of 1 g BiFeO3/SWCNTs can reach the maximum value of 1 000 μmol/g in 4-6 h.

基金项目：

博士后基金(20080430820);; 广东省绿色化学产品技术重点实验室开放基金(GC200805);; 华南农业大学校长基金(2008K014)资助项目

作者简介：

参考文献：

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