Plasmonic hot electron transfer-induced multicolor MoO3-x-based chromogenic system for visual and colorimetric determination of silver(I)
Plasmonic hot electron transfer-induced multicolor MoO3-x-based chromogenic system for visual and colorimetric determination of silver(I)
复制标题
等离子体热电子转移诱导的基于 MoO3-x 的多色显色系统，用于目视和比色测定银 (I)
DOI：
10.1007/s00604-020-4108-z
复制
发表时间：
2020-01
影响因子：
5.7
通讯作者：
He Yi
中科院分区：
文献类型：
--
作者：
Du Jiayan;Wang Junren;Deng Yuequan;He Yi
本文报道了一种等离子体热电子转移诱导荧光显色体系，用于银（I）的无标记目视比色测定。显色体系由具有氧空位的等离子体MoO 3-x纳米片和Ag（I）组成。在白色发光二极管（LED）的激发下，蓝色MoO 3-x纳米片表面形成了高能热空穴-电子对。由此产生的热电子被转移到Ag（I）上，在Ag（I）上被还原。这导致黄色银纳米颗粒的产生。同时，热空穴导致MoO 3-x纳米片氧化，产生无色MoO 3纳米片。同样，在白色LED照射下，AgNPs表面也可以产生高能热空穴-电子对，这有助于Ag（I）的还原和MoO 3-x的氧化。总的来说，可以观察到从蓝色到绿色，最后到黄色的彩色过渡。在430和760 nm波长下，该显色体系用于银（Ⅰ）的比色测定，检测限为0.66 μM，浓度范围为33-200 μM。该方法也适用于Ag（I）的半定量目视测定。图形摘要等离子体热电子转移诱导的基于MoO 3-x的显色体系的示意图，用于银（I）的目视和比色测定。
A plasmonic hot electron transfer-induced multicolor chromogenic system is described for label-free visual colorimetric determination of silver(I). The chromogenic system consists of plasmonic MoO3-xnanosheets with oxygen vacancies and Ag(I). Under white light-emitting diode (LED) excitation, energetic hot hole-electron pairs are formed on the surface of the blue MoO3-xnanosheets. The resulting hot electrons are transferred to Ag(I) upon which it becomes reduced. This results in the generation of yellow silver nanoparticles. Simultaneously, the hot holes lead to the oxidation of the MoO3-xnanosheets to yield colorless MoO3nanosheets. Similarly, energetic hot hole-electron pairs can also be generated on the surface of AgNPs under white LED irradiation, which contributes to the reduction of Ag(I) and the oxidation of MoO3-x. Overall, a colorful transition from blue to green and finally to yellow can be observed. This multicolor chromogenic system was applied to the colorimetric determination of Ag(I) in the 33–200 μM concentration range and a 0.66 μM limit of detection, at analytical wavelengths of 430 and 760 nm. The method also is amenable to semi-quantitative visual determination of Ag(I).Graphical abstractSchematic representation of plasmonic hot electron transfer-induced multicolor MoO3-x-based chromogenic system for visual and colorimetric determination of silver(I).
登录
查看更多内容
影响因子：
29.4
作者：
Alsaif, Manal M. Y. A.;Latham, Kay;Kalantar-zadeh, Kourosh
通讯作者：
Kalantar-zadeh, Kourosh
影响因子：
19
作者：
Zhang, Bao Yue;Zavabeti, Ali;Ou, Jian Zhen
通讯作者：
Ou, Jian Zhen
影响因子：
8.4
作者：
He, Yi;Zhang, Xianhui
通讯作者：
Zhang, Xianhui
影响因子：
21.8
作者：
Christopher, Phillip;Xin, Hongliang;Linic, Suljo
通讯作者：
Linic, Suljo
氧化钼纳米片遇上抗坏血酸：室温下可调谐表面等离子体共振和视觉比色检测
影响因子：
8.4
作者：
Li, Rui;An, Hongjie;He, Yi
通讯作者：
He, Yi