A perfectly aligned 63 helical tubular cuprous bromide single crystal for selective photo-catalysis, luminescence and sensing of nitro-explosives
A perfectly aligned 63 helical tubular cuprous bromide single crystal for selective photo-catalysis, luminescence and sensing of nitro-explosives
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完美排列的 63 螺旋管状溴化亚铜单晶，用于硝基爆炸物的选择性光催化、发光和传感
DOI：
10.1039/c4dt03657c
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发表时间：
2015
影响因子：
4
通讯作者：
Xian-Ming Zhang
中科院分区：
文献类型：
--
作者：
Ru-Xin Yao;Reshalaiti Hailili;Xin Cui;Li Wang;Xian-Ming Zhang
合成并表征了63螺旋管状溴化亚铜单晶，该单晶能选择性地降解橙子（MO）和胭脂红（KR）等负电荷染料，光催化效率高于纳米TiO2和ZnO。计算了分子的偶极矩方向和大小以及能带结构，揭示了高的光催化效率。此外，发光研究表明，CuBr管材料显示出非常强的黄色绿色发射，即使在室温下，在固态和乳液，并表现出极高的检测灵敏度，通过荧光猝灭对硝基炸药。在20 ppm的极低浓度下观察到可检测的发光响应，具有94.90%的高猝灭效率。结果表明，它们可能是一种很有前途的光催化、发光和传感硝基炸药的多功能材料。
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.