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材料研究学报  2010, Vol. 24 Issue (6): 631-637    
  研究论文 本期目录 | 过刊浏览 |
N掺杂介孔TiO2柠檬酸催化合成及其光催化性能研究
刘国聪1,2董辉3,刘少友3
1.玉林师范学院新材料研发与化学生物传感技术所 玉林 537000
2.中南大学化学化工学院 长沙 410083
3.凯里学院应用化学研究所 凯里 556000
Citric Acid–Catalyzed Synthesis of N–doped Mesoporous TiO2 and Their Photocatalytical Properties
LIU Guocong1,2, DONG Hui1, LIU Shaoyou3
1.Institute of advanced materials & Chembiosensing technology, Yulin Normal University, Yulin 537000
2.College of Chemistry and Chemical Engineering, Cental South University, Changsha 410083
3.Institute of Applied Chemistry, Kaili College, Kaili 556000
引用本文:

刘国聪 董辉 刘少友. N掺杂介孔TiO2柠檬酸催化合成及其光催化性能研究[J]. 材料研究学报, 2010, 24(6): 631-637.
, . Citric Acid–Catalyzed Synthesis of N–doped Mesoporous TiO2 and Their Photocatalytical Properties[J]. Chin J Mater Res, 2010, 24(6): 631-637.

全文: PDF(1231 KB)  
摘要: 采用柠檬酸酸催化溶胶--凝胶法合成了N掺杂介孔TiO2, 并用XRD、HRTEM、XPS、BET、UV--vis等手段表征了N--TiO2。测试结果表明, 煅烧前的样品是无定形TiO2, 低温煅烧后的产物是锐钛矿TiO2, 而750℃煅烧产物是金红石型。少量N元素的掺杂致使TiO2的吸收带边位置发生少许红移, 移向可见光区域。N2吸附--脱附和光解甲基橙结果显示, N掺杂介孔TiO2(3.0 at.%)的BET面积为102 m2/g, 孔尺寸大小约为9.8 nm, 具有比P25更强的光催化降解甲基橙的能力。
关键词 无机非金属材料介孔TiO2N掺杂甲基橙光催化    
Abstract:N–doped mesoporous TiO2 was prepared via a facile sol–gel route catalyzed by citric acid, and N–TiO2 was characterized using powder X–ray diffraction (XRD), High–resolution transmission electron microscope (HRTEM), X–ray photoelectron spectrum (XPS), N2 adsorption (BET), UV–xis diffused reflectance spectra (UV–vis). The results revealed that uncalcined N–TiO2 was amorphous, and the products calcined under lower temperatures were anatase, while the one annealed at 750oC was rutile .The doping of a little N  element resulted in a red shift of the absorption edge, shifting to the visible light region of mesoporous TiO2. N2 adsorption isotherm showed that the BET surface area and the average pore size of N–doped TiO2 were about 102 m2/g and 9.8 nm, respectively. Compared with P25 TiO2, N–doped mesoporous TiO2 exhibited improved photocatalysis activities for photodegradation of methyl orange.
Key wordsinorganic non-metallic materials    mesoporous TiO2    N–doped    methyl orange    photocatalysis
收稿日期: 2010-07-30     
ZTFLH: 

O612.4

 
基金资助:

湖南省自然科学基金08JJ3104, 广西自然科学青年基金2010GXNSFB013018, 广西高校优秀人才G2009033, G2009045, 国家自然科学基金21061006资助项目。

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