| Na_2SnO_3掺杂TiO_2的结构及对TNT的降解研究 |
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| 引用本文： | 崔海萍,闫军,张永涛,王彬. Na_2SnO_3掺杂TiO_2的结构及对TNT的降解研究[J]. 稀有金属材料与工程, 2009, 38(Z2) |
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| 作者姓名： | 崔海萍 闫军 张永涛 王彬 |
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| 作者单位： | 军械工程学院,河北,石家庄,050003 |
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| 基金项目： | 国家自然科学基金，军械工程学院基金资助 |
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| 摘 要： | 以钛酸丁酯为原料,Na_2SnO_3作为添加剂,通过溶胶-凝胶法制备了锐钛矿型TiO_2晶体,用XRD、FT-IR对催化剂进行了表征.红外光谱表明,Na_2SnO_3掺杂使得TiO_2粒子的晶格振动吸收峰向高波数移动6 cm~(-1),并出现明显的宽化.以含TNT废水为降解对象研究了所制备TiO_2的光催化活性.结果显示,所制备的SnO_3~(2-)掺杂TiO_2具有比P25更高的催化活性,10 h后降解率达到了96% (P25,88%).机制分析认为,SnO_3~(2-)在制备过程中通过热分解产生SnO_2,抑制TiO_2粒子在热处理过程中生长,有利于形成更细小的晶体,同时由于Sn~(4+)离子的影响,使微粒表面缺陷和活性比表面积增加,有利于提高光催化活性.
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| 关 键 词： | 二氧化钛 Na_2SnO_3掺杂 光催化降解 |
Study on Structure and Degradation to TNT of TiO_2 Doped with Na_2SnO_3 |
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| Cui Haiping,Yan Jun,Zhang Yongtao,Wang Bin. Study on Structure and Degradation to TNT of TiO_2 Doped with Na_2SnO_3[J]. Rare Metal Materials and Engineering, 2009, 38(Z2) |
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| Authors: | Cui Haiping Yan Jun Zhang Yongtao Wang Bin |
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| Affiliation: | Cui Haiping,Yan Jun,Zhang Yongtao,Wang Bin (Ordnance Engineering College,Shijiazhuang 050003,China) |
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| Abstract: | TiO2 crystal of anatase doped with SnO32-was prepared by sol-gel method using Ti(OBu)4 as raw material and Na2SnO3 as dopant. The as-prepared samples were characterized by FT-IR and XRD. FT-IR spectra of the TiO2 doped with SnO32-anion shows a broadened TiO2 vibration adsorption peak with approximate 6 cm-1 shift to higher wave number compared with the undoped samples. Photo-catalytic tests of the degradation of TNT solution show that SnO32-doping can increase the photo-catalytic activity of TiO2,which is h... |
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| Keywords: | TNT TiO_2 Na_2SnO_3 doped TNT photo-catalytic degradation |
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