组合性大气压化学蒸汽沉积 (cAPCVD):一种通往功能性质优化的途径
Andreas Kafizas1, Ivan P Parkin
1Materials Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London, UK WC1H 0AJ.
Journal of the American Chemical Society
|November 5, 2011
概括
组合性大气压化学蒸汽沉积 (cAPCVD) 快速优化薄膜的性能. 用添加的二氧化薄膜显示了增强的光催化和导电性,与结晶性和特定的晶体平面生长有关.
科学领域:
- 材料科学 材料科学 材料科学
- 薄膜沉积的情况
- 纳米技术纳米技术
背景情况:
- 优化功能薄膜对于高级应用程序至关重要.
- 组合合成为材料发现提供了高通量方法.
- 二氧化 (TiO2) 呈现出有希望的光催化和导电性质.
研究的目的:
- 为了证明组合性大气压化学蒸汽沉积 (cAPCVD) 快速优化薄膜性能.
- 为了研究 wolfen-doped anatase TiO2.2 的自我清洁特性.
- 为了建立W-doped TiO2薄膜中的组合功能关系.
主要方法:
- 在单个基板上使用cAPCVD合成了一种组合性W-doped TiO2薄膜库.
- 通过受控的试剂引入,产生了侧面组成梯度 (0.38-13.8 W/Ti原子%) .
- 通过使用高通量方法分析了200个片位置,以绘制构成-功能关系.
主要成果:
- 建立了薄膜组成,结晶性和功能性质之间的直接相关性.
- 光催化活性和导电性在特定的W/Ti兴奋剂水平 (0.38-13.8原子%) 上得到最大化,并且取决于薄膜晶度.
- 光诱导的表面湿增强主要与沿着 (211) 晶体平面的优先生长有关.
结论:
- cAPCVD是一种有效的方法,可以加速功能薄膜材料的优化.
- 这项研究提供了通过受控的兴奋剂和晶体生长为特定应用调整W-doped TiO2特性的见解.
- 了解组合功能依赖关系是设计具有量身定制性质的先进材料的关键.
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