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首页> 外文期刊>ACS combinatorial science >Combinatorial Atmospheric Pressure Chemical Vapor Deposition of Graded TiO2-VO2 Mixed-Phase Composites and Their Dual Functional Property as Self-Cleaning and Photochromic Window Coatings
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Combinatorial Atmospheric Pressure Chemical Vapor Deposition of Graded TiO2-VO2 Mixed-Phase Composites and Their Dual Functional Property as Self-Cleaning and Photochromic Window Coatings

机译：梯度TiO2-VO2混合相复合材料的组合大气压化学气相沉积及其作为自清洁和光致变色窗户涂料的双重功能

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摘要

A combinatorial film with a phase gradient from V:TiO2 (V: Ti≥ 0.08), through a range of TiO2-VO2 composites, to a vanadium-rich composite (V: Ti = 1.81) was grown by combinatorial atmospheric pressure chemical vapor deposition (cAPCVD). The film was grown from the reaction of TiCl4, VCl4, ethyl acetate (EtAc), and H2O at 550 °C on glass. The gradient in gas mixtures across the reactor induced compositional film growth, producing a single film with numerous phases and compositions at different positions. Seventeen unique positions distributed evenly along a central horizontal strip were investigated. The physical properties were characterized by wavelength dispersive X-ray (WDX) analysis, X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and UV-visible spectroscopy. The functional properties examined included the degree of photoinduced hydrophilicity (PIH), UVC-photocatalysis, and thermochromism. Superhydrophilic contact angles could be achieved at all positions, even within a highly VO2-rich composite (V: Ti = 1.81). A maximum level of UVC photocatalysis was observed at a position bordering the solubility limit of V:TiO2 (V: Ti ≈ 0.21) and fragmentation into a mixed-phase composite. Within the mixed-phase TiO2 VO2 composition region (V: Ti = 1.09 to 1.81) a decrease in the semiconductor-to-metal transition temperature of VO2 from 68 to 51 °C was observed.
机译：通过组合式常压化学气相沉积法制备了一种相膜，其相梯度为V：TiO2（V：Ti≥0.08），经过一系列TiO2-VO2复合材料，直至富钒复合材料（V：Ti = 1.81）。 （cAPCVD）。该薄膜是由TiCl4，VCl4，乙酸乙酯（EtAc）和H2O在550°C的玻璃上反应生长而成的。穿过反应器的气体混合物中的梯度引起了组成膜的生长，产生了在不同位置具有许多相和组成的单层膜。研究了沿着中央水平条均匀分布的17个唯一位置。物理性质通过波长色散X射线（WDX）分析，X射线衍射（XRD），拉曼光谱，扫描电子显微镜（SEM）和紫外可见光谱进行表征。检查的功能特性包括光诱导亲水性（PIH），UVC光催化和热致变色的程度。即使在高度富VO2的复合材料（V：Ti = 1.81）内，也可以在所有位置实现超亲水接触角。在与V：TiO2（V：Ti≈0.21）的溶解度极限接壤的位置处观察到最大程度的UVC光催化，并碎裂成混合相复合物。在混合相TiO2 VO2组成区域（V：Ti = 1.09至1.81）内，观察到VO2的半导体到金属的转变温度从68°C降低至51°C。

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