Institute of Multidisciplinary Research for Advanced Materials, Tohuko University, 2-1-1 Katahira, Sendai, Aoba-ku Japan.
Nanoscale Res Lett. 2010 Aug 20;6(1):5. doi: 10.1007/s11671-010-9750-7.
CaAl2O4:(Eu, Nd)/TiO2-xNy composite luminescent photocatalyst was successfully synthesized by a simple planetary ball milling process. Improvement of photocatalytic deNOx ability of TiO2-xNy, together with the persistent photocatalytic activity for the decomposition of NO after turning off the light were realized, by coupling TiO2-xNy with long afterglow phosphor, CaAl2O4:(Eu, Nd). The novel persistent photocatalytic behavior was related to the overlap between the absorption wavelength of TiO2-xNy and the emission wavelength of the CaAl2O4:(Eu, Nd). It was found that CaAl2O4:(Eu, Nd)/TiO2-xNy composites provided the luminescence to persist photocatalytic reaction for more than 3 h after turning off the light. GRAPHICAL CaAl2O4:(Eu, Nd)/TiO2-xNy composite luminescent photocatalyst with persistent deNOx activity after turning off the light was successfully synthesized by a simple planetary ball milling process. The novel persistent photocatalytic behavior was related to the overlap between the absorption wavelength of TiO2-xNy and the emission wavelength of the CaAl2O4:(Eu, Nd).
CaAl2O4:(Eu,Nd)/TiO2-xNy 复合上转换发光光催化剂的简便行星球磨法合成。通过将 TiO2-xNy 与长余辉荧光粉 CaAl2O4:(Eu,Nd) 耦合，实现了 TiO2-xNy 的光催化脱硝能力的提高，以及在关闭光后对 NO 分解的持续光催化活性。这种新型的持续光催化行为与 TiO2-xNy 的吸收波长与 CaAl2O4:(Eu,Nd) 的发射波长之间的重叠有关。研究发现，CaAl2O4:(Eu,Nd)/TiO2-xNy 复合材料在关闭光后提供了持续超过 3 小时的光致发光，从而维持光催化反应。通过简单的行星球磨法成功合成了具有持续脱硝活性的 CaAl2O4:(Eu,Nd)/TiO2-xNy 复合上转换发光光催化剂。这种新型的持续光催化行为与 TiO2-xNy 的吸收波长与 CaAl2O4:(Eu,Nd) 的发射波长之间的重叠有关。
