Yao Ru-Xin, Hailili Reshalaiti, Cui Xin, Wang Li, Zhang Xian-Ming
Department of Chemistry & Material Science, Shanxi Normal University, Linfen 041004, P. R. China.
Dalton Trans. 2015 Feb 21;44(7):3410-6. doi: 10.1039/c4dt03657c.
A perfectly aligned 63 helical tubular cuprous bromide single crystal has been synthesized and characterized, which can selectively decompose negatively charged dyes of Methyl Orange (MO) and Kermes Red (KR), and the photocatalytic efficiency is higher than that of nanosized (∼25 nm) TiO2 and ZnO. The direction and magnitude of the dipole moments as well as the band structure were calculated to reveal high photocatalytic efficiency. Moreover, luminescence studies indicate that the CuBr tube materials show very strong yellowish green emissions in the solid state and emulsion even at room temperature, and exhibit extremely high detection sensitivity towards nitro-explosives via fluorescence quenching. Detectable luminescence responses were observed at a very low concentration of 20 ppm with a high quenching efficiency of 94.90%. The results suggest that they may be promising multifunctional materials for photo-catalysis, luminescence and sensing of nitro-explosives.
已合成并表征了一种完美排列的63螺旋管状溴化亚铜单晶，它能选择性地分解带负电荷的甲基橙（MO）和枣红（KR）染料，且光催化效率高于纳米尺寸（约25 nm）的TiO2和ZnO。通过计算偶极矩的方向和大小以及能带结构来揭示高光催化效率。此外，发光研究表明，即使在室温下，CuBr管材料在固态和乳液中也表现出非常强的黄绿色发射，并通过荧光猝灭对硝基炸药表现出极高的检测灵敏度。在20 ppm的极低浓度下观察到可检测的发光响应，猝灭效率高达94.90%。结果表明，它们可能是用于光催化、发光和硝基炸药传感的有前途的多功能材料。
