Hydrothermal synthetic mercaptopropionic acid stabled CdTe quantum dots as fluorescent probes for detection of Ag+

Gan, Tingting; Zhang, Yujun; Zhao, Nanjing; Xue, Xiao; Yin, Guisheng; Sheng, Yu; Wang, Huanbo; Jian-nan, Duan; Shi, Chaoyi; Liu, Wenqing

doi:10.1016/j.saa.2012.09.005

Cited by 61 publications

(17 citation statements)

References 32 publications

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“…The results are shown in Table 3. Although, some metal ions such as Ag + , Cu 2+ and Fe 3+ did quench the fluorescence of MPA-capped CdTe QDs this result was similar to a previous report (22,33) due to the ability of small cations to pass through the shell layer and interact with the core, and thus leading to a chemical displacement of the surface Cd 2+ ions by Ag + , Cu 2+ and Fe 3+ to form AgTe, CuTe and FeTe particles on the surface of QDs core (34). However, these ions are usually present at very low concentration in pharmaceutical products.…”

Section: Tolerance Of Foreign Compoundssupporting

confidence: 90%

Mercaptopropionic acid–capped CdTe quantum dots as fluorescence probe for the determination of salicylic acid in pharmaceutical products

Bunkoed

Kanatharana

2015

Luminescence

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Mercaptopropionic acid (MPA)-capped cadmium telluride (CdTe) quantum dot (QDs) fluorescent probes were synthesized in aqueous solution and used for the determination of salicylic acid. The interaction between the MPA-capped CdTe QDs and salicylic acid was studied using fluorescence spectroscopy and some parameters that could modify the fluorescence were investigated to optimize the measurements. Under optimum conditions, the quenched fluorescence intensity of MPA-capped CdTe QDs was linearly proportional to the concentration of salicylic acid in the range of 0.5-40 µg mL(-1) with a coefficient of determination of 0.998, and the limit of detection was 0.15 µg mL(-1). The method was successfully applied to the determination of salicylic acid in pharmaceutical products, and satisfactory results were obtained that were in agreement with both the high pressure liquid chromatography (HPLC) method and the claimed values. The recovery of the method was in the range 99 ± 3% to 105 ± 9%. The proposed method is simple, rapid, cost effective, highly sensitivity and eminently suitable for the quality control of pharmaceutical preparation. The possible mechanisms for the observed quenching reaction was also discussed.

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Section: Tolerance Of Foreign Compoundssupporting

confidence: 90%

Mercaptopropionic acid–capped CdTe quantum dots as fluorescence probe for the determination of salicylic acid in pharmaceutical products

Bunkoed

Kanatharana

2015

Luminescence

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“…The synthesis method is one such key factor. For example, Duan et al Gan et al and Rodrigues et al synthesized 3‐mercaptopropionic acid (MPA)–CdTe QDs using a microwave irradiation method, a reflux method and a hydrothermal method, respectively, and used the obtained MPA–CdTe QDs as a probe for the determination of metal ions. It is surprising that the three types of MPA–CdTe QDs showed very different selectivity and sensitivity for the determination of Hg 2+ , Ag + and Fe 3+ .…”

Section: Introductionmentioning

confidence: 99%

A highly selective and simple fluorescent sensor for mercury (II) ion detection based on cysteamine‐capped CdTe quantum dots synthesized by the reflux method

Ding

Yang

et al. 2014

Luminescence

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Cysteamine (CA)-capped CdTe quantum dots (QDs) (CA-CdTe QDs) were prepared by the reflux method and utilized as an efficient nano-sized fluorescent sensor to detect mercury (II) ions (Hg(2+) ). Under optimum conditions, the fluorescence quenching effect of CA-CdTe QDs was linear at Hg(2+) concentrations in the range of 6.0-450 nmol/L. The detection limit was calculated to be 4.0 nmol/L according to the 3σ IUPAC criteria. The influence of 10-fold Pb(2+) , Cu(2+) and Ag(+) on the determination of Hg(2+) was < 7% (superior to other reports based on crude QDs). Furthermore, the detection sensitivity and selectivity were much improved relative to a sensor based on the CA-CdTe QDs probe, which was prepared using a one-pot synthetic method. This CA-CdTe QDs sensor system represents a new feasibility to improve the detection performance of a QDs sensor by changing the synthesis method.

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“…Calorimetric sensing technology has used for analytes like NO 2 -, NO 3 -, Pb(II), Cu(II), Hg(II), and cocaine [83][84][85][86][87]. For heavy metals analytes like Cd(II), Pb(II), Hg(II), and Cu(II), the fluorescence sensing technology is mostly employed [88][89][90][91][92][93][94][95][96][97][98]. The surface-enhanced Raman spectroscopy (SERS) sensing technology is used for sensing the pesticides, bacteria, viruses, and protozoa [99][100][101][102][103].…”

Section: Gas Sensing Applications In Water Quality Control and Monitoringmentioning

confidence: 99%

Gas Sensor Applications in Water Quality Monitoring and Maintenance

Yadav

Indurkar

2021

Water Conserv Sci Eng

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Industrial and population expansion in the last few decades has been a critical contributor to water quality degradation. Some of the gases emanating from water treatment plants are toxic and flammable, which need to be identified, such as hydrogen sulphide, carbon dioxide, methane, and carbon monoxide. Water quality monitoring systems must be developed to meet legal, environmental, and social requirements. Monitoring water quality is difficult due to the variability, nature, and low concentrations of contaminants that need to be detected. The gas emanating from these treatment processes plays an essential role in water treatment, monitoring, and control. Gas sensors can be used as a safety device in the water purification process. The gas sensors receive input signals in chemical, physical, and biological stimulus and convert them into electrical signals. The gas sensors can be installed in different wastewater treatment processes. In this review, we present state-of-the-art progresses, landmark developments, and technological achievements that led to the development of gas sensors for evaluating water quality. The role of gas sensors in water quality maintenance and monitoring is discussed, and different analytes and their detection technologies and sensing materials outlining their advantages and disadvantages have been summarized. Finally, a summary and outlook for future directions of gas sensors in water quality monitoring and maintenance are provided.

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Hydrothermal synthetic mercaptopropionic acid stabled CdTe quantum dots as fluorescent probes for detection of Ag+

Cited by 61 publications

References 32 publications

Mercaptopropionic acid–capped CdTe quantum dots as fluorescence probe for the determination of salicylic acid in pharmaceutical products

Mercaptopropionic acid–capped CdTe quantum dots as fluorescence probe for the determination of salicylic acid in pharmaceutical products

A highly selective and simple fluorescent sensor for mercury (II) ion detection based on cysteamine‐capped CdTe quantum dots synthesized by the reflux method

Gas Sensor Applications in Water Quality Monitoring and Maintenance

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