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首页> 外文期刊>Coatings >Hydrophilic Titania Thin Films from a Molecular Precursor Film Formed via Electrospray Deposition on a Quartz Glass Substrate Precoated with Carbon Nanotubes
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Hydrophilic Titania Thin Films from a Molecular Precursor Film Formed via Electrospray Deposition on a Quartz Glass Substrate Precoated with Carbon Nanotubes

机译：来自通过电喷雾沉积在碳纳米管的石英玻璃基板上通过电喷雾沉积形成的分子前体膜的亲水性二氧化钛薄膜

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Titania precursor films were electrosprayed on a quartz glass substrate, which was pre-modified with an ultra-thin film obtained by spin-coating a single-walled carbon nanotube (SWCNT) dispersed solution. The X-ray diffraction patterns of the thin films obtained by heat-treating the precursor films at 500 °C in air for 1 h indicated that the formed crystals were anatase. A new route to fabricate transparent thin films on the insulating substrate via electrospray deposition (ESD) was thus attained. The photoluminescence spectrum of the thin film showed a peak at 2.23 eV, assignable to the self-trapped exciton of anatase. The Raman spectrum of the thin film demonstrated that heat treatment is useful for removing SWCNTs. The thin film showed a water contact angle of 14 ± 2° even after being kept under dark conditions for 1 h, indicating a high level of hydrophilicity. Additionally, the thin film had a super-hydrophilic surface with a water contact angle of 1 ± 1° after ultraviolet light irradiation with an intensity of 4.5 mW cm–2 at 365 nm for 1 h. The importance of Ti3+ ions in the co-present amorphous phase, which was dominantly formed via the ESD process, for hydrophilicity was also clarified by means of X-ray photoelectron spectroscopy.
机译：二氧化钛前体膜在石英玻璃基板上电喷雾，其用通过通过旋涂单壁碳纳米管（SWCNT）分散的溶液而获得的超薄膜预制。通过在空气中在500℃下热处理前体膜而获得的薄膜的X射线衍射图表明所形成的晶体是锐钛矿。由此获得了通过电喷雾沉积（ESD）在绝缘基板上制造透明薄膜的新途径。薄膜的光致发光光谱在2.23eV中显示出峰，可分配到锐钛矿的自捕获子激子。薄膜的拉曼光谱表明，热处理可用于去除SWCNTs。薄膜即使在暗条件下保持1小时后，薄膜也显示出14±2°的水接触角，表明高水平的亲水性。另外，薄膜的超亲水性表面具有1±1°的水接触角，紫外线照射，强度为4.5mm-2，在365nm处为1小时。通过X射线光电子光谱，还阐明了通过ESD工艺显着形成的共同存在的无定形相中的Ti3 +离子的重要性，用于亲水性。

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