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Greener synthesis and characterization of cadmium-tellurium quantum dots using aqueous extract of waste orange peel

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Title Greener synthesis and characterization of cadmium-tellurium quantum dots using aqueous extract of waste orange peel
 
Creator Mahalakhsmi, A
Baskar, G
 
Subject Cadmium-Tellurium
Greener Synthesis
Optical properties
Photoluminescence
Quantum dots
 
Description 56-61
Cadmium-Tellurium quantum dots are inorganic semiconductor material. In the present study, highly stable Cadmium-Tellurium (CdTe) quantum dots with good optical properties were successfully synthesized by using waste orange peel extract. Fourier-transform infrared spectroscopy (FTIR) identified the presence of hydroxyl, carboxyl and amine groups. Multifunctional X-ray Photoelectron Spectroscopy (XPS) confirmed the presence of cadmium and tellurium. The average size of the quantum dots was found to be 6nm using Transmission Electron Microscopy (TEM). The cubic zinc blende type crystalline structure of quantum dots was confirmed by X-ray powder diffraction (XRD). Thermal stability was studied using thermo-gravimetric analysis (TGA). The influence of temperature with respect to mass change of 8% was observed at 200°C. The high luminescence property exhibits at the wavelength of 502 nm were investigated using photoluminescence analysis (PL) and the blue shift is confirmed by UV-Visible spectroscopy.
 
Date 2021-02-01T09:06:23Z
2021-02-01T09:06:23Z
2021-02
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://nopr.niscair.res.in/handle/123456789/56037
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJBB Vol.58(1) [February 2021]