The Effect of Solvent on the Phase of Titanium Dioxide Deposited by Aerosol-assisted CVD
The Effect of Solvent on the Phase of Titanium Dioxide Deposited by Aerosol-assisted CVD
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DOI：
10.1002/cvde.201106961
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发表时间：
2012-06
影响因子：
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通讯作者：
C. Edusi;G. Sankar;I. Parkin
中科院分区：
文献类型：
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作者：
C. Edusi;G. Sankar;I. Parkin
甲醇、乙醇、己烷、二氯甲烷和异丙醇溶剂中的异丙醇钛 (IV) (TTIP) 用于在 550 °C 下使用气溶胶辅助 (AA)CVD 在玻璃和钢基材上沉积二氧化钛薄膜。沉积薄膜的 X 射线衍射 (XRD) 和拉曼光谱表明，使用甲醇作为载体溶剂在钢上仅产生金红石薄膜，在玻璃基板上主要产生金红石相，而使用其他溶剂在相同条件下仅在钢上产生锐钛矿相。 TiO2 也可以通过 AACVD 从乙醇和甲醇溶剂的混合物中沉积。乙醇中只要 15% 的甲醇就会产生金红石作为主要相。通过染料墨水测试，用乙醇生产的二氧化钛薄膜比用甲醇生产的薄膜具有更高的光催化剂活性。所有薄膜都表现出光诱导的超亲水性，但令人惊讶的是，在黑暗中储存的薄膜的水接触角超过 100°。
Titanium (IV) isopropoxide (TTIP) in methanol, ethanol, hexane, dichloromethane, and isopropanol solvents is used to deposit titanium dioxide thin films on glass and steel substrates at 550 °C using aerosol-assisted (AA)CVD. X-ray diffraction (XRD), and Raman spectra of the as-deposited films show that using methanol as the carrier solvent produces exclusively rutile films on steel, and predominantly rutile on glass substrates, while the use of the other solvents produces exclusively anatase phase on the steel under the same conditions. TiO2 is also deposited by AACVD from a mixture of ethanol and methanol solvents. As little as 15% of methanol in ethanol produces rutile as the predominant phase. Using a dye-ink test, the titanium dioxide thin films produced with ethanol are shown to be more active photocatalysts than films produced with methanol. All the films show photo-induced superhydrophilicity but, surprisingly, films stored in the dark have a water contact angle above 100°.