|Table of Contents|

Influence of Heat Treatment on Microstructure of TiO2/SiO2 Nanocomposite

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2009年01期
Page:
142-146
Research Field:
Publishing date:

Info

Title:
Influence of Heat Treatment on Microstructure of TiO2/SiO2 Nanocomposite
Author(s):
YANG YiWANG Qi-weiWANG Lian-jun
School of Chemical Engineering,NUST,Nanjing 210094,China
Keywords:
heat treatment nanometer composites sol-gel method microstructures
PACS:
TB383.1
DOI:
-
Abstract:
To study the effect of heat treatment on the microstructure of nanometer composites,the nanometer TiO2/SiO2 composites with high special surface area and high pore volume are prepared by sol-gel method with ethyl orthosilicate and tetrabutyl titanate.DSC,TGA,XRD,FTIR and special surface area(BET) tester are employed to analyse the microstructure of the nanocomposite treated by different temperature.The result indicates that the crystal transformation temperature of anatase and rutile of nanometer TiO2 in the TiO2/SiO2 composite increases from 350℃ and 600℃up to 660℃ and 770℃,respectively.It is obviously higher than its general crystal transformation temperature.Its crystal diameter increases with the increase of heat treatment temperature and treatment time.With the increase of heat treatment temperature,the special surface area of nanometer TiO2/SiO2 composite decreases visibly.The reduction proportion of the little micropore in the nanocomposite decreases too,while that of the bigger micropore is increased.

References:

[ 1] Y an H uizhen, Fan Rong tao. Applica tion o f so la r ene rgy)titan ium d iox ide photo ca talytic techno logy in watertrea tm en t[ J]. J Env iron H ealth, 2005, 22 ( 3 ):231- 233.

[ 2] Liu Guohong, Zhu Yongfa, ZhangX inrong, et a.l Chemiluminescence. s determ ination of ch lor inated vo latile organiccompounds by conversion on nanometer T iO2 [ J].Ana l Chem, 2002, 74: 6279- 6284.
[ 3] Ibanez J A, LitterM, P izarro I, et a.l Photocatalyticbacter icida l e ffect o fT iO2 on n itrobacter ia c loacae[ J].J Pho tochem and Pho tob io A: Chem, 2003, 157( 1):81- 85.
[ 4] 杨毅, 卫巍, 张雪莲. 复合纳米T iO2 建筑涂料[ J].化学建材, 2002( 2) : 16- 18.
[ 5] 周秀文, 朱祖良, 罗明仁, 等. 赵君科( T iO2 - CdS) /S iO2 复合粉体的溶胶- 凝胶法合成及晶相转变[ J].材料导报, 2004, 18( 2): 83- 85.
[ 6] Vorotilov K A, O rlova E V, Petrovsky V I. So-l ge lT iO2 film s on silicon substrate thin so lid film s [ J].Env iron Sc iTechn, 1992, 207( 2): 180- 184.
[ 7] Peill N. Doped Q-S ized T iO2 coating in a fibe r-opticable pho to chem ica l reac to r[ J]. J Pho tochem Photob io lA, 1997, 108( 213): 221- 223.
[ 8] 李凤生, 杨毅. 纳米/微米复合技术及应用[M ]. 北京: 国防工业出版社, 2002. 3- 6.
[ 9] Fu X A, Qutubudd in S. Synthesis of titania-coated si-lica nanoparticles using a nonion ic wa ter- in-o ilm icroemulsion [ J ]. Physico chem ica l and Eng ineer ing Aspects,2001, 179: 65- 70.
[ 10] 翟继卫, 张良莹, 姚熹. 溶胶- 凝胶制备T iO2 /S iO2复合薄膜的FT- IR表征[ J]. 功能材料, 1997, 28( 5):490- 491.
[ 11] 陈文梅, 杨尊先, 赵修建, 等. 光催化超亲水性TiO2- S iO2 [ J]. 硅酸盐学报, 2001, 29( 1): 39- 43.
[ 12] K le ita F, B lanchard J, Zibrow ius B, et a.l Influence o fcosurfactants on the properties o fm esostructured m ater-ials[ J]. Langm uir, 2002, 18( 12): 4963- 4971.
[ 13] Suzuk iK, Ikar iK, Im a iH. Synthes is o f silica nanoparticles hav ing a w el-l o rdered mesoporous using adoub le surfac tant system [ J]. J Am Chem Soc, 2004,126: 462- 463.[ 14] ZhangWenhu,i Zhang Le,i X ie Leiw en, et a.l Pore sizedesign of orderedm esopo rous silica by contro llingm ice llaproperties of block copolymer EO20 PO70 EO20 [ J]. M icroporousandMesoporousMater ia ls, 2006, 89: 179- 185.
[ 15] 李鑫, 李忠. 硅胶的孔结构对脱附活化能的影响[ J].南京理工大学学报(自然科学版), 2006, 30( 6): 787- 792.

Memo

Memo:
-
Last Update: 2012-11-19