TiO2 based photocatalysis: a valuable approach for the removal of pharmaceuticals from aquatic environment

Sharma, Manisha; Yadav, Anoop; Mandal, Mrinal Kanti; Dubey, Kashyap Kumar

doi:10.1007/s13762-021-03894-y

Cited by 36 publications

(19 citation statements)

References 86 publications

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“…Meanwhile, TiO2 mediated photocatalysis has been highlighted as one of the most promising approaches to degrade stable organic contaminants in water by producing hydroxyl radicals [8,9]. Given their sufficiently optical/electric properties, non-toxic nature, high photocatalytic capacity, and longterm chemical stability, metal oxide semi-conductors including TiO2 have been proven in recent publications as potential photocatalysts for successful oxidation as well as antibacterial inactivation of OTC [10,11].…”

Section: Introductionmentioning

confidence: 99%

Visible Light Activated Fe-N-SiO2/TiO2 Photocatalyst: Providing an Opportunity for Enhanced Photocatalytic Degradation of Antibiotic Oxytetracycline in Aqueous Solution

Habeeb¹,

Zinatizadeh²,

Mousavi³

et al. 2023

IJE

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To probe advantages in Fe-N-SiO2/TiO2 nanocomposite system, the visible photocatalytic degradation of the nonbiodegradable antibiotic oxytetracycline (OTC) by unsupported TiO2 and its modified composites by incorporating each of the Fe, N, and SiO2 dopants under a series of conditions were investigated. The structural and optical properties as well as the morphology of the prepared nanocomposites were also characterized applying Fourier transform infrared (FT-IR), X-ray diffraction, photoluminescence spectroscopy, UV-visible diffuse reflectance spectra and field emission scanning electron microscopy/Energy-dispersive X-ray spectroscopy (FESEM/EDX). In order to develop two models portraying appropriate functional relationships between two main responses (OTC removal efficiency and its specific removal rate (SRR)) and four numerical variables (OTC concentration, catalysis loading, initial pH and reaction time), two separate multivariate analysis pathways under response surface methodology (RSM) were taken. The results obtained all came down to the maximum SRR (220 OTC mg OTC removed/g cat. h) found at the maximum catalyst dosage of 1.5 g/l, and acidic pH of 3 after 0.5 h. Furthermore, the Fe-N-SiO2/TiO2 proved a stable photocatalytic activity during three subsequent reusability experiments, shedding light on its reliable potential for future application.

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Section: Introductionmentioning

confidence: 99%

Visible Light Activated Fe-N-SiO2/TiO2 Photocatalyst: Providing an Opportunity for Enhanced Photocatalytic Degradation of Antibiotic Oxytetracycline in Aqueous Solution

Habeeb¹,

Zinatizadeh²,

Mousavi³

et al. 2023

IJE

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“… 33 − 36 Environment-friendly implementation of photocatalytic approaches enables the use of a highly efficient technique for the degradation of antibacterial compounds with complete mineralization. 37 TiO 2 is the most studied and used photocatalyst for the removal of antibiotics from wastewater. However, the large band gap limits the photoabsorbance in visible light and is a hindrance to the exploitation of the energetic potential for degradation and removal of antibiotics from wastewater.…”

Section: Introductionmentioning

confidence: 99%

“… 38 , 39 The efficiency of the semiconductor-based photocatalyst was enhanced with doping, heterogeneous composition, noble metal deposition, use of supportive materials, use of hybrid nanomaterials, and surface modification of the photocatalyst by using an alternative method of synthesis. 37 , 40 − 50 …”

Section: Introductionmentioning

confidence: 99%

“…Advanced oxidation processes (AOPs) are one of the extensively used methodologies for the treatment of wastewater/effluents which utilize highly reactive and oxidizing species (O 3 , • O 2 , H 2 O 2 , OH • ) for the complete degradation of the target compounds into carbon dioxide and water . Photocatalysis is the most studied and promising AOP technology used for the degradation of antibiotics as there is no requirement of any additional chemicals and it can be performed under light and pressure conditions under a mild temperature. − Environment-friendly implementation of photocatalytic approaches enables the use of a highly efficient technique for the degradation of antibacterial compounds with complete mineralization . TiO 2 is the most studied and used photocatalyst for the removal of antibiotics from wastewater.…”

Section: Introductionmentioning

confidence: 99%

“…TiO 2 is the most studied and used photocatalyst for the removal of antibiotics from wastewater. However, the large band gap limits the photoabsorbance in visible light and is a hindrance to the exploitation of the energetic potential for degradation and removal of antibiotics from wastewater. , The efficiency of the semiconductor-based photocatalyst was enhanced with doping, heterogeneous composition, noble metal deposition, use of supportive materials, use of hybrid nanomaterials, and surface modification of the photocatalyst by using an alternative method of synthesis. ,− …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Visible-Light-Driven Photocatalytic Degradation of Tetracycline Using Heterostructured Cu₂O–TiO₂Nanotubes, Kinetics, and Toxicity Evaluation of Degraded Products on Cell Lines

et al. 2022

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This study first reports on the tetracycline photodegradation with the synthesized heterostructured titanium oxide nanotubes coupled with cuprous oxide photocatalyst. The large surface area and more active sites on TiO 2 nanotubes with a reduced band gap (coupling of Cu 2 O) provide faster photodegradation of tetracycline under visible light conditions. Cytotoxicity experiments performed on the RAW 264.7 (mouse macrophage) and THP-1 (human monocytes) cell lines of tetracycline and the photodegraded products of tetracycline as well as quenching experiments were also performed. The effects of different parameters like pH, photocatalyst loading concentration, cuprous oxide concentration, and tetracycline load on the photodegradation rate were investigated. With an enhanced surface area of nanotubes and a reduced band gap of 2.58 eV, 1.5 g/L concentration of 10% C-TAC showed the highest efficiency of visible-light-driven photodegradation (∼100% photodegradation rate in 60 min) of tetracycline at pH 5, 7, and 9. The photodegradation efficiency is not depleted up to five consecutive batch cycles. Quenching experiments confirmed that superoxide radicals and hydroxyl radicals are the most involved reactive species in the photodegradation of tetracycline, while valance band electrons are the least involved reactive species. The cytotoxicity percentage of tetracycline and its degraded products on RAW 264.7 (−0.932) as well as THP-1 (-0.931) showed a negative correlation with the degradation percentage with a p -value of 0.01. The toxicity-free effluent of photodegradation suggests the application of the synthesized photocatalyst in wastewater treatment.

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Ti–N–C Bonded Close‐Coupled TiO₂/g‐C₃N₄ for Rapid Degradation of Cationic Dyes from a Multi‐Dye System by Persulfate Activation

et al. 2023

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A novel Z-Scheme photocatalyst (TCN) was prepared with TiO 2 and graphitic carbon nitride (GCN) and utilized to study the degradation efficiency of a binary dye mixture consisting of 5 ppm Rhodamine B (RhB) and 5 ppm Crystal Violet (CV) solutions by persulfate activation. Derivative spectrometric analysis was adopted to find the degradation efficiencies of the individual dyes in the mixture.The results indicate that in the presence of persulfate ions 0.6 TCN gives 100 % degradation in 60 min and 30 min for Rh B and CV, respectively. Hydroxyl radicals, superoxide radicals, and sulfate radicals were found to be the active species involved in photocatalytic degradation. From the results of radical scavenging experiments and band potentials of the semiconductors, a plausible mechanism of photocatalytic degradation of the model pollutants is proposed.

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TiO2 based photocatalysis: a valuable approach for the removal of pharmaceuticals from aquatic environment

Cited by 36 publications

References 86 publications

Visible Light Activated Fe-N-SiO2/TiO2 Photocatalyst: Providing an Opportunity for Enhanced Photocatalytic Degradation of Antibiotic Oxytetracycline in Aqueous Solution

Visible Light Activated Fe-N-SiO2/TiO2 Photocatalyst: Providing an Opportunity for Enhanced Photocatalytic Degradation of Antibiotic Oxytetracycline in Aqueous Solution

Visible-Light-Driven Photocatalytic Degradation of Tetracycline Using Heterostructured Cu₂O–TiO₂Nanotubes, Kinetics, and Toxicity Evaluation of Degraded Products on Cell Lines

Ti–N–C Bonded Close‐Coupled TiO₂/g‐C₃N₄ for Rapid Degradation of Cationic Dyes from a Multi‐Dye System by Persulfate Activation

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TiO2 based photocatalysis: a valuable approach for the removal of pharmaceuticals from aquatic environment

Cited by 36 publications

References 86 publications

Visible Light Activated Fe-N-SiO2/TiO2 Photocatalyst: Providing an Opportunity for Enhanced Photocatalytic Degradation of Antibiotic Oxytetracycline in Aqueous Solution

Visible Light Activated Fe-N-SiO2/TiO2 Photocatalyst: Providing an Opportunity for Enhanced Photocatalytic Degradation of Antibiotic Oxytetracycline in Aqueous Solution

Visible-Light-Driven Photocatalytic Degradation of Tetracycline Using Heterostructured Cu2O–TiO2Nanotubes, Kinetics, and Toxicity Evaluation of Degraded Products on Cell Lines

Ti–N–C Bonded Close‐Coupled TiO2/g‐C3N4 for Rapid Degradation of Cationic Dyes from a Multi‐Dye System by Persulfate Activation

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Visible-Light-Driven Photocatalytic Degradation of Tetracycline Using Heterostructured Cu₂O–TiO₂Nanotubes, Kinetics, and Toxicity Evaluation of Degraded Products on Cell Lines

Ti–N–C Bonded Close‐Coupled TiO₂/g‐C₃N₄ for Rapid Degradation of Cationic Dyes from a Multi‐Dye System by Persulfate Activation