Photocatalytic degradation of 2,4-dicholorophenoxyacetic acid by TiO2 modified catalyst: kinetics and operating cost analysis

Balakrishnan, Akash; Gopalram, Keerthiga; Sowmya, Appunni

doi:10.1007/s11356-021-12928-4

Cited by 58 publications

(19 citation statements)

References 61 publications

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“… where C 0 is the initial concentration of MB (mg·L –1 ) and C t is the concentration of MB at time t (mg·L –1 ), t is the contact time in hours, and k 0 , k 1 , and k 2 are zero-order, first-order, and second-order rate constants, respectively. 35 …”

Section: Methodsmentioning

confidence: 99%

“…The rate and kinetics of MB removal are explored using zero-order, pseudo-first-order, and pseudo-second-order kinetic models (eqs –). where C 0 is the initial concentration of MB (mg·L –1 ) and C t is the concentration of MB at time t (mg·L –1 ), t is the contact time in hours, and k 0 , k 1 , and k 2 are zero-order, first-order, and second-order rate constants, respectively …”

Section: Methodsmentioning

confidence: 99%

“…where C 0 is the initial concentration of MB (mg•L −1 ) and C t is the concentration of MB at time t (mg•L −1 ), t is the contact time in hours, and k 0 , k 1 , and k 2 are zero-order, first-order, and second-order rate constants, respectively. 35 To understand the mechanism of photodegradation, photocatalytic experiments were performed in presence of 1 M of isopropyl alcohol, CuCl 2 , benzoquinone, and 0.2 M of EDTA separately to entrap the radicals involved in the process.…”

Section: Photocatalytic Degradation Experimentsmentioning

confidence: 99%

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Nanoclay- and TiO₂ Nanoparticle-Modified Poly(N-vinyl pyrrolidone) Hydrogels: A Multifunctional Material for Application in Photocatalytic Degradation and Adsorption-Based Removal of Organic Contaminants

et al. 2022

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In recent times, access to clean water has become increasingly difficult and one of the most important problems for the sustainability of life due to environmental pollution. Based on this thought, in this study, a multifunctional hydrogel nanocomposite (nanoclay@TiO 2 @PNVP) containing linear poly( N -vinyl pyrrolidone) (PNVP), nanoclay, and TiO 2 nanoparticles was synthesized and used as an adsorbent and photocatalyst for the adsorption-based and photocatalytic degradation-based removal of organic and pharmaceutical pollutants such as methylene blue (MB) and sildenafil citrate (SLD). The modification of the hydrogel with TiO 2 nanoparticles and nanoclay aimed to increase the adsorption capacity of the PNVP hydrogel as well as to gain photocatalytic properties for the effective removal of organic contaminants. This hybrid material, which can be cleaned in two different ways, can be reused and recycled at least 10 times. Characterization studies were carried out using Fourier transform infrared spectroscopy, scanning electron microscopy, Raman spectroscopy, thermogravimetric analysis, differential thermogravimetry, and viscosimetry techniques. Optimization studies for the adsorption-based removal of organic contaminants were carried out on MB and SLD as model organic compounds. The optimum parameters for MB were found at pH 10 of the sample solution when 50 mg of the nanoclay@TiO 2 @PNVP hydrogel nanocomposite was used for 420 min of contact time. It was observed that 99% of the MB was photocatalytically degraded within 150 min at pH 10. Our material had multifunctional applicability properties, showing high adsorption and photocatalytic performances over 99% for at least 10 times of use. For the removal of organic and pharmaceutical contaminants from wastewater, the synthesized material can be used in two treatment processes separately or in combination in one step, providing an important advantage for its usability in environmental applications.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Photocatalytic Degradation Experimentsmentioning

confidence: 99%

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Nanoclay- and TiO₂ Nanoparticle-Modified Poly(N-vinyl pyrrolidone) Hydrogels: A Multifunctional Material for Application in Photocatalytic Degradation and Adsorption-Based Removal of Organic Contaminants

et al. 2022

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“…Photocatalysis is a highly utilized advanced oxidation process for wastewater treatment. 82,84,148 Photocatalysis attained research importance due to its high efficiency, environmental friendliness, no formation of by-products and complete mineralization of pollutants. 73 Very few researchers synthesized CS/ MOF-based photocatalysts for environmental remediation.…”

Section: Catalytic Applicationsmentioning

confidence: 99%

Chitosan/metal organic frameworks for environmental, energy, and bio-medical applications: a review

Balakrishnan,

Jacob,

Dayanandan

et al. 2023

Mater. Adv.

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“…The pseudo-rst-order model equation provided below is utilized to determine the mechanism of MG elimination (Balakrishnan et al 2021).…”

Section: Photocatalytic Activity Testmentioning

confidence: 99%

Visible Light-Induced Decolorization of Malachite Green over BP-TiO2 Photocatalyst

Channei

Thammaacheep

Jannoey

et al. 2023

Preprint

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Porous materials are often added to TiO2 photocatalysts for their superior surface area and reaction rate. Separation and recovery of spent photocatalysts is a challenge for treating industrial dye wastewater with photocatalysts to prevent environmental contamination. The objective of this research was to create a TiO2/BP composite using sol-gel technique, with the purpose of improving its effectiveness in treating wastewater containing MG dye and facilitating its separation. The synthesized TiO2/BP composite was characterized using field emission transmission electron microscopy (FESEM), energy dispersive X-ray (EDX) analysis, diffuse reflectance spectroscopy (DRS UV–vis), photoluminescence spectra (PL), and Brunauer–Emmett–Teller (BET) specific surface area and porosity analysis. Subsequently, the TiO2/BP composite that was synthesized was tested for photoactivity and compared to bare TiO2 particles. The outcomes indicated that the TiO2/BP photocatalyst had a significant boost in photocatalytic activity for decolorizing MG dye and was 3 times faster than the bare TiO2 under visible light. The results from the recyclability test showed that it maintained consistent performance for up to 4 cycles. This showed that the porous material-based photocatalytic composite has a potential application in wastewater treatment and is expected to have a broad application in wastewater treatment.

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Photocatalytic degradation of 2,4-dicholorophenoxyacetic acid by TiO2 modified catalyst: kinetics and operating cost analysis

Cited by 58 publications

References 61 publications

Nanoclay- and TiO₂ Nanoparticle-Modified Poly(N-vinyl pyrrolidone) Hydrogels: A Multifunctional Material for Application in Photocatalytic Degradation and Adsorption-Based Removal of Organic Contaminants

Nanoclay- and TiO₂ Nanoparticle-Modified Poly(N-vinyl pyrrolidone) Hydrogels: A Multifunctional Material for Application in Photocatalytic Degradation and Adsorption-Based Removal of Organic Contaminants

Chitosan/metal organic frameworks for environmental, energy, and bio-medical applications: a review

Visible Light-Induced Decolorization of Malachite Green over BP-TiO2 Photocatalyst

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Photocatalytic degradation of 2,4-dicholorophenoxyacetic acid by TiO2 modified catalyst: kinetics and operating cost analysis

Cited by 58 publications

References 61 publications

Nanoclay- and TiO2 Nanoparticle-Modified Poly(N-vinyl pyrrolidone) Hydrogels: A Multifunctional Material for Application in Photocatalytic Degradation and Adsorption-Based Removal of Organic Contaminants

Nanoclay- and TiO2 Nanoparticle-Modified Poly(N-vinyl pyrrolidone) Hydrogels: A Multifunctional Material for Application in Photocatalytic Degradation and Adsorption-Based Removal of Organic Contaminants

Chitosan/metal organic frameworks for environmental, energy, and bio-medical applications: a review

Visible Light-Induced Decolorization of Malachite Green over BP-TiO2 Photocatalyst

Contact Info

Product

Resources

About

Nanoclay- and TiO₂ Nanoparticle-Modified Poly(N-vinyl pyrrolidone) Hydrogels: A Multifunctional Material for Application in Photocatalytic Degradation and Adsorption-Based Removal of Organic Contaminants

Nanoclay- and TiO₂ Nanoparticle-Modified Poly(N-vinyl pyrrolidone) Hydrogels: A Multifunctional Material for Application in Photocatalytic Degradation and Adsorption-Based Removal of Organic Contaminants