Effect of metal ions on the quenching of photoluminescent CdTe QDs and their recovery

Wang, Aiwu; Fu, Li; Rao, T. K. Visweswara; Cai, Wen; Yuen, Muk-Fung; Zhong, Jiasong

doi:10.1016/j.optmat.2015.01.010

Cited by 32 publications

(16 citation statements)

References 25 publications

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“…Since the chemical reduction of Cu 2+ to Cu + lies between the conduction band and valence band of g-C 3 N 4 , the PL of g-C 3 N 4 can be quenched with a low detection limit of 0.5 nM [ 103 ]. A similar mechanism has been explained in previous work [ 104 ]. In that work, a relatively low detection limit of 0.04 nM has been achieved by CdTe QDs.…”

Section: Multifunctional Applicationssupporting

confidence: 82%

Recent Advances of Graphitic Carbon Nitride-Based Structures and Applications in Catalyst, Sensing, Imaging, and LEDs

et al. 2017

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The graphitic carbon nitride (g-C3N4) which is a two-dimensional conjugated polymer has drawn broad interdisciplinary attention as a low-cost, metal-free, and visible-light-responsive photocatalyst in the area of environmental remediation. The g-C3N4-based materials have excellent electronic band structures, electron-rich properties, basic surface functionalities, high physicochemical stabilities and are “earth-abundant.” This review summarizes the latest progress related to the design and construction of g-C3N4-based materials and their applications including catalysis, sensing, imaging, and white-light-emitting diodes. An outlook on possible further developments in g-C3N4-based research for emerging properties and applications is also included.

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Section: Multifunctional Applicationssupporting

confidence: 82%

Recent Advances of Graphitic Carbon Nitride-Based Structures and Applications in Catalyst, Sensing, Imaging, and LEDs

et al. 2017

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“…Cadmium–telluride (CdTe) based QDs are fluorescent semiconductor nanoparticles approximately 2–10 nm in diameter, with unique photophysical properties, such as narrow and size‐dependent fluorescence, broad absorption spectra, strong fluorescence intensity, and excellent anti‐photobleaching . CdTe QDs are rapidly being applied in many fields, such as solar cells, light‐emitting devices, biological and medical imaging, drug testing, virus detection, and so on .…”

Section: Introductionmentioning

confidence: 99%

Optical and structural properties of hydrophilic CdTe quantum dots in cationic starch polymeric matrix

2015

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In this work, water soluble CdTe quantum dots (QDs) were incorporated into a biopolymeric matrix of polyacrylamide grafted onto cationic starch (CS-g-PAAm) to enhance optical properties of QDs. To this aim, the effect of various factors such as AAm concentration, molar ratio of CS-g-PAAm/CdTe, reaction temperature and time on optical properties of obtained QDs were investigated via UV-visible (UV-vis) and fluorescence spectra. Finally, the optimized QDs were characterized by Fourier transform infrared (FT-IR), transmission electron microscopy (TEM), thermo-gravimetric (TG) analysis, and energy dispersive X-ray analysis (EDX).

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“…9 shows the high-resolution spectra of Cu (2p) region of the sample after Cu 2+ treatment (1mM) (The whole XPS spectrum shown in Fig. [27][28][29] Thus, a red-shift of the PL spectra of luminescent membranes can be observed. After modified by AugerScan software, two positions (931.…”

Section: Cdte/bc Nanocomposite Membranes In Metal Ion Analysismentioning

confidence: 96%

Color-tunable luminescent CdTe quantum dot membranes based on bacterial cellulose (BC) and application in ion detection

et al. 2015

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Color-tunable luminescent membranes CdTe QDs on the bacterial cellulose (BC) nanofibers were successfully fabricated by in situ synthesis in aqueous solution. No nitrogen protection and expensive reagents are needed during the preparation process. The luminescent color of CdTe/BC nanocomposite membranes with green, orange and red luminescence can be tuned easily by controlling reaction time. The prepared CdTe/BC nanocomposites were characterized by X-ray diffraction (XRD), field effect scanning electron microscopy with energy dispersive X-ray analysis (FESEM-EDX) and transmission electron microscope (TEM). Ultravioletvisible (UV-vis), photoluminescence (PL) spectra and PL quantum efficiency (PL QE) 2 were used to investigate the optical properties. Moreover, we attempted to make the luminescent membranes as ion test paper. The green luminescent membranes had a good selectivity for Cu 2+ with the detection limit of 0.016 mM and the mechanism of quenching Cu 2+ were also explored. This work provides a simple, effective and eco-friendly method for the construction of luminescent CdTe QDs on BC membranes with high detectability for detection Cu 2+ .

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Effect of metal ions on the quenching of photoluminescent CdTe QDs and their recovery

Cited by 32 publications

References 25 publications

Recent Advances of Graphitic Carbon Nitride-Based Structures and Applications in Catalyst, Sensing, Imaging, and LEDs

Recent Advances of Graphitic Carbon Nitride-Based Structures and Applications in Catalyst, Sensing, Imaging, and LEDs

Optical and structural properties of hydrophilic CdTe quantum dots in cationic starch polymeric matrix

Color-tunable luminescent CdTe quantum dot membranes based on bacterial cellulose (BC) and application in ion detection

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