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Effect of NaOH Concentration on Formation and Photocatalytic Performanceof TiO2 Nanotubes Prepared by Hydrothermal Method(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2018年03期
Page:
52-
Research Field:
·化学·
Publishing date:

Info

Title:
Effect of NaOH Concentration on Formation and Photocatalytic Performanceof TiO2 Nanotubes Prepared by Hydrothermal Method
Author(s):
Zhang Zheng1; Jia Jiankui1; Jiang Caiyun2; Huang Wenxin1; Feng Changsheng1; Wang Yuping1
(1.Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control,Nanjing Normal University,Nanjing 210023,China)(2.Department of Engineering and Technology,Jiangsu Institute of Commerce,Jiangsu Engineering andResearch Center of Food Safety,Nanjing 210007,China)
Keywords:
NaOH concentration; TiO2 nanotubes; hydrothermal method; photocatalysis; methylene blue
PACS:
O643,X703A
DOI:
10.3969/j.issn.1001-4616.2018.03.009
Abstract:
TiO2 nanotubes were prepared via hydrothermal synthesis by taking titanium dioxide P25 and NaOH as raw materials. The effects of alkali concentration on nanotube formation,crystal form and morphology were investigated. The composition,structure and morphology of the as-prepared samples were characterized by XRD,TEM,BET and XPS. The results showed that the P25 particles in the system can be dissolved and crystallized to form sodium titanate curl body when the NaOH concentration was higher than 10 mol/L. The steps of washing,pickling and calcination were necessary to form anatase phase titanium dioxide nanotubes. When the concentration of NaOH was 10 mol/L,the specific surface area of nanotubes reached 213.30 m2/g,which was 4.2 times as much as that of P25. In photodegradation test,when exposed to metal halide lamp for 24 min,the degradation rate of 20 mg/L methylene blue reached 100% for titanium dioxide nanotubes and 63.38% for P25,respectively.

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Last Update: 2018-11-19