Photocatalytic efficiency of Ag2Te on ZnTe quantum dots: preparation, characterisation and application of response surface methodology

Photodegradation of ampicillin (AMP) over illuminated Ag 2 Te/ZnTe was investigated with the influence of physico-chemical attributes of the nano-catalyst. The Ag 2 Te content was increased in the hybrid catalyst. The photodegradation performance was enhanced due to decrease in the band gap of the c...

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Bibliographic Details
Published in:International journal of environmental analytical chemistry 2022-11, Vol.102 (13), p.3069-3082
Main Authors: Fatolahi, Leila, Feizbakhsh, Alireza, Konoz, Elaheh, AhmadPanahi, Homayon
Format: Article
Language:English
Subjects:
Ampicillin
Analytical methods
Antibiotics
Box-Behnken design
Catalysts
Crystallites
Crystals
Decomposition reactions
Emission analysis
Field emission microscopy
Field emission spectroscopy
Light scattering
Optimization
Penicillin
pH effects
Photodecomposition
Photodegradation
Photon correlation spectroscopy
Quantum dots
Response surface methodology
Scanning electron microscopy
Silver compounds
Spectroscopy
Te/ZnTe
X-ray diffraction
Zinc tellurides
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Summary:Photodegradation of ampicillin (AMP) over illuminated Ag 2 Te/ZnTe was investigated with the influence of physico-chemical attributes of the nano-catalyst. The Ag 2 Te content was increased in the hybrid catalyst. The photodegradation performance was enhanced due to decrease in the band gap of the catalyst. This was further enhanced by adding Ag 2 Te to ZnTe quantum dots (QDs). The prepared catalyst was studied using analytic techniques such as X-ray diffraction, ultraviolet-visible spectroscopy, field emission scanning electron microscope and dynamic light scattering. The crystallite sizes are distinguished to be 8.62, 14.45, 17.28 and 21.44 nm for ZnTe QDs, Ag 2 Te/ZnTe-0, Ag 2 Te/ZnTe-1 and Ag 2 Te/ZnTe-2, respectively. The effect of three factors such as pH, nano-catalyst dose and AMP concentration was studied for photodecomposition of AMP. Study of reaction optimisation was performed by using the response surface methodology with Box-Behnken design. High correlation was found for the actual and the predicted amount (R 2  = 0.9907, Adj. R 2  = 0.9787 and Pred.R 2  = 0.9657). Optimisation outcome indicated that the maximum efficiency of photodegradation was found at neutral pH, with nano-catalyst dose of 1.0 g/L and AMP concentration 10 mg/L.
ISSN:0306-7319
1029-0397
DOI:10.1080/03067319.2020.1763970