封装的三倍三倍消灭基上转换在亚频段间隙半导体光学催化剂的水相
1School of Civil and Environmental Engineering, Georgia Institute of Technology, 200 Bobby Dodd Way, Atlanta, Georgia 30332, USA.
Journal of the American Chemical Society
|October 16, 2012
概括
这项研究证明了使用半导体光催化剂的三倍三倍灭绝 (TTA) 上转换的水相光敏感化. 这种新的方法使可见光有效地产生基,即使在环境条件下也是如此.
科学领域:
- 材料科学 材料科学 材料科学
- 摄影化学的使用.
- 纳米技术纳米技术
背景情况:
- 半导体光催化通常需要高能光子.
- 三倍三倍灭绝 (TTA) 上转换可以利用低能光子,但通常需要去氧化.
- 对于光催化剂的水相TTA上转化仍然是一个重大挑战.
研究的目的:
- 开发一种水相TTA上转换系统,用于光敏感化半导体光催化剂.
- 为了使子频段间隙光子用于水中的光催化.
- 使用这个系统来证明基基的光化学产生.
主要方法:
- 在微囊中封装一个 ((II) 八乙烯/9,10-二乙烯敏感剂/受体对.
- 在微囊中使用六甲/聚乙烯溶剂混合物.
- 使用带有 Pt 的 WO(3) 作为半导体光催化剂.
主要成果:
- 在没有脱氧的情况下实现了稳定的水相TTA上转换.
- 在环境条件下,经过一个多月的持续升级.
- 通过使用绿光 (532 nm) 的UC辅助光化学成功产生基.
结论:
- 水相TTA上转换是可行的光敏感化半导体光催化剂.
- 开发的微囊系统克服了以前的TTA-UC方法的局限性.
- 这种方法为可见光驱动的光催化和激素生成提供了新的途径.
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