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[1]林本兰,沈晓冬,崔升,等.锐钛矿型TiO2气凝胶的制备和光催化性能[J].南京工业大学学报(自然科学版),2016,38(02):20-26.[doi:10.3969/j.issn.1671-7627.2016.02.004]
 LIN Benlan,SHEN Xiaodong,CUI Sheng,et al.Preparation and photocatalytic properties of anatase TiO2 aerogel[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2016,38(02):20-26.[doi:10.3969/j.issn.1671-7627.2016.02.004]
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锐钛矿型TiO2气凝胶的制备和光催化性能()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
38
期数:
2016年02期
页码:
20-26
栏目:
出版日期:
2016-04-10

文章信息/Info

Title:
Preparation and photocatalytic properties of anatase TiO2 aerogel
文章编号:
1671-7627(2016)02-0020-07
作者:
林本兰沈晓冬崔升王洪慧
南京工业大学 材料科学与工程学院,江苏 南京 210009
Author(s):
LIN BenlanSHEN XiaodongCUI ShengWANG Honghui
College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
关键词:
锐钛矿型TiO2气凝胶 乙醇超临界干燥 甲基橙 催化性能
Keywords:
anatase TiO2 aerogel ethanol supercritical drying methyl orange photocatalysis
分类号:
TQ134.1
DOI:
10.3969/j.issn.1671-7627.2016.02.004
文献标志码:
A
摘要:
采用乙醇超临界干燥直接制得锐钛矿型TiO2气凝胶,研究乙醇超临界干燥和煅烧处理前后TiO2晶体结构的变化,并分别研究HNO3、C2H5OH和H2O用量对凝胶时间和气凝胶催化性能的影响。采用X线衍射仪(XRD)、透射电子显微镜(TEM)、紫外-可见(UV-Vis)漫反射和N2吸附-脱附表征气凝胶。结果表明:乙醇超临界干燥即可制得锐钛矿型TiO2气凝胶,晶粒平均粒径约为10 nm,禁带宽度为3.06 eV,存在明显孔道结构,HNO3用量4 mL、n(H2O)/n(Ti(OC4H9)4)=4、n(C2H5OH)/n(Ti(OC4H9)4)=15时,凝胶时间50 min,气凝胶的比表面积、孔容和平均孔径分别为201.88 m2/g、0.42 cm3/g和19.11 nm,对甲基橙的催化降解速率常数约为1.38 h-1,高于商业TiO2(P25)的催化降解速率常数(1.14 h-1)。
Abstract:
Anatase TiO2 aerogel was prepared using ethanol supercritical drying. The TiO2 crystal structure after ethanol supercritical drying and heat treatment was investigated. The effects of HNO3, C2H5OH and H2O addition on the photocatalytic properties of TiO2 aerogel were investigated. TiO2 aerogel was characterized by X-ray diffraction(XRD), transmission electron microscopy(TEM), N2 adsorption-desorption, and ultraviolet visible spectrophotometer(UV-Vis)diffuse reflectance. Results showed that anatase TiO2 aerogel was directly obtained after supercritical drying, with the average particle size about 10 nm, band gap of 3.06 eV and obvious pore structure. The specific surface area was 201.88 m2/g, pore volume was 0.42 cm3/g, and average pore diameter was 19.11 nm, under the conditions of HNO3 4 mL, n(H2O)/n(Ti(OC4H9)4)=4 and n(C2H5OH)/n(Ti(OC4H9)4)=15 for gel time 50 min. The catalytic degradation rate constant of methyl orange was 1.38 h-1 and higher than that of P25 1.14 h-1.

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备注/Memo

备注/Memo:
收稿日期:2014-11-05
基金项目:长江学者和创新团队发展计划(IRT_15R35); 江苏省产学研前瞻性联合研究项目(BY2015005-01); 江苏省高校自然科学研究重大项目(15KJA430005); 江苏省科技支撑计划(工业)(BE2014128); 江苏省科技项目临床医学科技专项(BL2014074); 江苏高校优势学科建设工程
作者简介:林本兰(1982—),女,江苏南京人,博士,主要研究方向为气凝胶材料; 崔升(联系人),教授,E-mail:scui@njtech.edu.cn; 沈晓冬(联系人),教授,E-mail:xdshen@njtech.edu.cn.
引用本文:林本兰,沈晓冬,崔升,等.锐钛矿型TiO2气凝胶的制备和光催化性能[J].南京工业大学学报(自然科学版),2016,38(2):20-26..
更新日期/Last Update: 2016-03-20