| 大孔-介孔氮掺杂二氧化钛的制备及其光催化性能测试 |
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| 引用本文： | 景文珩,王韦岗,邢卫红.大孔-介孔氮掺杂二氧化钛的制备及其光催化性能测试[J].催化学报,2009,30(5). |
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| 作者姓名： | 景文珩 王韦岗 邢卫红 |
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| 作者单位： | 南京工业大学化学化工学院材料化学工程国家重点实验室,江苏南京,210009 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，国家高技术研究发展计划(863计划)，教育部新世纪优秀人才支持计划，江苏省六大人才高峰项目 |
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| 摘 要： | 以嵌段共聚物为模板剂,甲酰胺为氮源,结合溶胶凝胶法制备了具有可见光活性的大孔-介孔氮掺杂二氧化钛(N-TiO2)材料.通过X射线衍射、低温N2吸附-脱附、扫描电镜、紫外-可见吸收光谱等手段,考察了嵌段共聚物对样品微结构和可见光活性的影响.结果表明,样品主要以锐钛矿相和板钛矿相混合形式存在;改变嵌段共聚物的浓度,可以制得晶粒粒径9～12 nm,孔径10～14 nm,禁带宽度2.98～2.76 eV的大孔-介孔N-TiO2,且随着模板剂加入量的增加,大孔孔径增大,孔壁增厚.对甲基橙溶液的室内自然光降解实验表明,大孔-介孔N-TiO2具有良好的光催化活性,随着嵌段共聚物加入量的增加,样品对甲基橙的降解时间缩短,降解率提高.
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| 关 键 词： | 嵌段共聚物 甲酰胺 二氧化钛 氮掺杂 大孔-介孔 甲基橙 光催化降解 |
Preparation and Photocatalytic Activity of Macro-Mesoporous N-Doped TiO_2 |
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| JING Wenheng,WANG Weigang,XING Weihong.Preparation and Photocatalytic Activity of Macro-Mesoporous N-Doped TiO_2[J].Chinese Journal of Catalysis,2009,30(5). |
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| Authors: | JING Wenheng WANG Weigang XING Weihong |
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| Institution: | JING Wenheng,WANG Weigang,XING Weihong State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemistry , Chemical Engineering,Nanjing University of Technology,Nanjing 210009,Jiangsu,China |
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| Abstract: | A visible-light-active nitrogen-doped titanium dioxide(N-TiO2) photocatalyst,being of macro-mesoporous structure,was synthe-sized by the sol-gel method using a block copolymer as template and fromamide as nitrogen source.The effects of the block copolymer on the microstructrue and the visible light absorption activity were studied by the analysis of X-ray diffraction,low temperature nitrogen ad-sorption-desorption,and UV-Vis spectroscopy.The results showed that the materials were composed of anatase and bro... |
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| Keywords: | block copolymer formamide titanium dioxide nitrogen doping macropore mesopore methyl orange photocatalytic degradation |
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