南京信息工程大学学报
南京信息工程大學學報
남경신식공정대학학보
JOURNAL OF NANJING UNIVERSITY OF INFORMATION SCIENCE & TECHNOLOGY
2014年
6期
505-509
,共5页
刘斌%姚义俊%周凯%仲坤%苏义%盛群
劉斌%姚義俊%週凱%仲坤%囌義%盛群
류빈%요의준%주개%중곤%소의%성군
明胶%纳米晶%TiO2%多孔%微球
明膠%納米晶%TiO2%多孔%微毬
명효%납미정%TiO2%다공%미구
gelatin%nanocrystalline%TiO2%porous%microspheres
TiO2纳米晶多孔微球具有颗粒大、晶粒尺寸小及比表面积较高等优点.以明胶作为模板,以钛酸丁酯为原料,采用溶胶?凝胶法制备了TiO2纳米晶多孔微球,并采用透射电镜、X射线衍射仪对其性能进行了表征.实验结果表明:采用溶胶?凝胶法成功制备了纯锐钛矿型TiO2;明胶的加入对样品的物相组成没有影响,但改变了其晶粒尺寸和排布方式,得到了一种由纳米晶组成的多孔微球;微球直径约为200~500 nm,其中孔隙约为2~5 nm,平均晶粒尺寸为(14?3±0?9) nm.在此基础上对TiO2纳米晶多孔微球的形成机理进行了分析.
TiO2納米晶多孔微毬具有顆粒大、晶粒呎吋小及比錶麵積較高等優點.以明膠作為模闆,以鈦痠丁酯為原料,採用溶膠?凝膠法製備瞭TiO2納米晶多孔微毬,併採用透射電鏡、X射線衍射儀對其性能進行瞭錶徵.實驗結果錶明:採用溶膠?凝膠法成功製備瞭純銳鈦礦型TiO2;明膠的加入對樣品的物相組成沒有影響,但改變瞭其晶粒呎吋和排佈方式,得到瞭一種由納米晶組成的多孔微毬;微毬直徑約為200~500 nm,其中孔隙約為2~5 nm,平均晶粒呎吋為(14?3±0?9) nm.在此基礎上對TiO2納米晶多孔微毬的形成機理進行瞭分析.
TiO2납미정다공미구구유과립대、정립척촌소급비표면적교고등우점.이명효작위모판,이태산정지위원료,채용용효?응효법제비료TiO2납미정다공미구,병채용투사전경、X사선연사의대기성능진행료표정.실험결과표명:채용용효?응효법성공제비료순예태광형TiO2;명효적가입대양품적물상조성몰유영향,단개변료기정립척촌화배포방식,득도료일충유납미정조성적다공미구;미구직경약위200~500 nm,기중공극약위2~5 nm,평균정립척촌위(14?3±0?9) nm.재차기출상대TiO2납미정다공미구적형성궤리진행료분석.
Porous TiO2 microspheres with nanocrystalline have the advantages of big grain size,small crystalline size and high specific surface.In this study,porous TiO2 microspheres with nanocrystalline were fabricated by using butyl titanate as raw material and gelatin as a template with the sol?gel method.Then their properties were character?ized by transmission electron microscope and X?ray diffraction. The results showed that the pure anatase TiO2 was gained and its composite was not changed when the gelatin solution was added.However,the gelatin refined and re?arranged TiO2 crystallizes.It was demonstrated that porous TiO2 microspheres with the diameter of about 200?500 nm were formed,and consisted of nanocrystallizes with the average size of(14?3 ± 0?9)nm and pores about 2?5 nm.Mo?reover,the formation mechanism of porous TiO2 microspheres was analyzed.