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Citation: HUANG Hong, LEI Ming, HUANG Wei-Xin, CHEN Huan-Qin. Superhydrophilic TiO₂ Film Prepared with the Assistance of Complexing Agents[J]. Chinese Journal of Applied Chemistry, ;2010, 27(11): 1322-1327. doi: 10.3724/SP.J.1095.2010.90856 shu

Superhydrophilic TiO₂ Film Prepared with the Assistance of Complexing Agents

Guangdong Provincial Key Laboratory for Green Chemical Product Technology, School of Chemistry and Energy Engineering, South China University of Technology, Guangzhou 510640

Received Date: 21 December 2009
Revised Date: 2 May 2010

A novel method was developed to produce a TiO₂ film with circular pores on its surface.Macrospore structure can be obtained in the presence of two complexing agents of acetylacetone(acac) and diethanolamine(DEA) under a template-free condition.Notwithstanding,it has been found that irrespective of the kind of complexing agents,whether it is acac,or DEA,a common flat surface-formation process has been confirmed.In this account,acac or DEA added in the sols serve as stabilizers that impedes the hydrosis and polymerization among constituents during gel-forming reactions.But the situation has entirely changed when both acac and DEA were used as complexing agents.The hydrolysis is conducted under acidic conditions where a relatively narrow distribution of growing oligomers can be obtained.And the phase separation is driven by the reduction of miscibility between the polar solvent and polycondensed inorganic species.The phaseformation time would decline according the adding amount of DEA which triggers the process of hydrolysis under acidic conditions.The fluid phase of solvent mixture could oxidize and decompose to carbon dioxide which leaves numerous pores on the surface.The results show that the TiO₂ film doped with two stabilizers exhibits superhydrophilic characteristic(6.5°) although it is not exposed to ultraviolet irradiation,comparing with flat ones(20° and 23°).Finally,the formation mechanism and the property-structure relationship were discussed in details.
- porous film,
- acetyl acetone,
- diethanolamine,
- complexing agent,
- superhydrophilic
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Superhydrophilic TiO2 Film Prepared with the Assistance of Complexing Agents

南开大学师唯/华北电力大学（保定）刘景维：二维配位聚合物中有序的亲锂冠醚位点用于无枝晶锂沉积

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通讯作者: 陈斌, bchen63@163.com

Superhydrophilic TiO₂ Film Prepared with the Assistance of Complexing Agents