Aqueous synthesis of CdTe quantum dots by hydride generation for visual detection of silver on quantum dot immobilized paper,Analytical Methods

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Aqueous synthesis of CdTe quantum dots by hydride generation for visual detection of silver on quantum dot immobilized paper
Analytical Methods ( IF 2.7 ) Pub Date : 2017-08-09 00:00:00 , DOI: 10.1039/c7ay01705g
Ke Huang _{1,

2,

3,

4} , Rui Dai _{1,

2,

3,

4} , Wenqing Deng _{1,

2,

3,

4} , Ling Lin _{3,

4,

5,

6} , Ai Zhang _{1,

2,

3,

4} , Xin Yuan _{3,

4,

5,

6}

Affiliation

A novel visual detection method was developed for silver using CdTe quantum dot (QD) immobilized paper. CdTe QDs were synthesized in aqueous solution by hydride generation (HG) for the first time, with H₂Te gas being introduced into the aqueous medium containing Cd²⁺ ions. The gaseous precursor, H₂Te, is generated on-line by reducing TeO₃²⁻ with KBH₄. The visible fluorescence from the CdTe QDs immobilized on paper was quenched by Ag⁺. A limit of detection (LOD) of 0.01 μg mL⁻¹ and a relative standard deviation (RSD, n = 7) of 2.1% at a concentration of 1 μg mL⁻¹ of Ag⁺ were obtained when using a commercial fluorescence spectrophotometer as the detector. In visual detection, as low as 1 μg mL⁻¹ of Ag⁺ in antibacterial textiles and drugs can be easily discriminated from the blank with the naked eye. The proposed method has several unique advantages, including straightforwardness, rapidness, affordability and requirement of no equipment for visual detection.

中文翻译：

氢化物发生水合CdTe量子点的合成，用于在量子点固定纸上目测银

开发了一种新颖的视觉检测方法，使用CdTe量子点（QD）固定纸对银进行检测。第一次通过氢化物生成（HG）在水溶液中合成CdTe QD，并将H ₂ Te气体引入到含有Cd ²⁺离子的水性介质中。通过用KBH ₄还原TeO ₃^2-可以在线生成气态前体H ₂ Te 。固定在纸上的CdTe量子点的可见荧光被Ag ⁺猝灭。Ag ⁺浓度为1μgmL ^-1时，检出限（LOD）为0.01μgmL ^-1，相对标准偏差（RSD，n = 7）为2.1％当使用市售荧光分光光度计作为检测器时，获得了C。在视觉检测中，可以轻松地用肉眼从空白中区分出抗菌纺织品和药物中低至1μgmL ^-1的Ag ⁺。所提出的方法具有几个独特的优点，包括直接性，快速性，可负担性以及不需要用于视觉检测的设备。

更新日期：2017-09-21

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