Performance comparison of photocatalysts for degradation of organic pollutants using experimental studies supported with DFT and fundamental characterization

Chakinala, Nandana; Ranjan, Prabhat; Chakinala, Anand G.; Gogate, Parag R.

doi:10.1016/j.catcom.2022.106589

Cited by 8 publications

(4 citation statements)

References 50 publications

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“…It is acknowledged that the pH of the solution affects photocatalytic degradation, and the optimal pH depends mainly on the type of pollutant to be treated [ 37 ]. The initial pH of the solution varied between pH 2 and 7.…”

Section: Resultsmentioning

confidence: 99%

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Key Role of Corncob Based-Hydrochar (HC) in the Enhancement of Visible Light Photocatalytic Degradation of 2,4-Dichlorophenoxyacetic Acid Using a Derivative of ZnBi-Layered Double Hydroxides

Tuong Vy,

Nha Khanh,

Nghia

et al. 2023

Materials

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A superior heterojunction of HC-ZnBi-LDO was synthesized in two steps, namely hydrothermal carbonization, followed by co-precipitation. The 2% HC-ZnBi-LDO heterojunction photocatalysts could degrade over 90.8% of 30 mg/L 2,4-dichlorophenoxyacetic acid (2,4-D) using 1.0 g/L of the catalyst after 135 min of visible light exposure at pH 4. The activity of 2% HC-ZnO-LDO was remarkably stable. Approximately 86.4–90.8% of 30 mg/L 2,4-D was degraded, and more than 79–86.4% of TOC was mineralized by 2% HC-ZnBi-LDO at pH 4 after 135 min of visible light exposure during four consecutive cycles. The rapid separation and migration of charge carriers at the interfaces between HC and ZnBi-LDO were achieved within 2% HC-ZnBi-LDO. Moreover, the electron acceptor characteristic of HC in 2% HC-ZnBi-LDO caused the recombination of charge carriers to decrease significantly, thus generating more reactive radicals, such as hydroxyl radicals (OH●) and superoxide radicals (O2●−). These results demonstrate that the novel 2% HC-ZnBi-LDO is a superior photocatalyst for the remediation of hazardous organic pollutants.

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Section: Resultsmentioning

confidence: 99%

“…This may be related to the p Ka of the herbicide, 2,4-D, and the pH PZC of the photocatalyst. The pH can change the electric charge at the surface of the catalyst [ 37 ]. The point of zero charge (PZC) for 2% HC-ZnBi-LDO, measured in this study, was 6.65 ( Figure 4 b).…”

Section: Resultsmentioning

confidence: 99%

Key Role of Corncob Based-Hydrochar (HC) in the Enhancement of Visible Light Photocatalytic Degradation of 2,4-Dichlorophenoxyacetic Acid Using a Derivative of ZnBi-Layered Double Hydroxides

Tuong Vy,

Nha Khanh,

Nghia

et al. 2023

Materials

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“…2 Although there are different physical and chemical treatment methods available that have been reviewed for the treatment of wastewater, they are associated with different performance characteristics, generation of secondary wastes and high treatment costs. [3][4][5] In recent times, advanced oxidation processes (AOPs) have been extensively studied for the degradation of various pollutants as they mainly produce hydroxyl radicals ( • OH) also resulting in the formation of superoxide radicals (O 2…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, in many developing countries, the bulk of domestic and industrial wastewater is directly discharged into natural streams without any treatment processes or after primary treatment only as a consequence of high treatment costs, causing severe health and environmental concerns 2 . Although there are different physical and chemical treatment methods available that have been reviewed for the treatment of wastewater, they are associated with different performance characteristics, generation of secondary wastes and high treatment costs 3‐5 . In recent times, advanced oxidation processes (AOPs) have been extensively studied for the degradation of various pollutants as they mainly produce hydroxyl radicals ( • OH) also resulting in the formation of superoxide radicals (O 2 •− ) and hydroperoxyl radicals ( • OOH), driving the degradation of pollutants 6,7 .…”

Section: Introductionmentioning

confidence: 99%

Sonocatalytic degradation of nitrobenzene with metal oxide clay nanocomposites

Saini,

Chakinala,

Surolia

et al. 2023

J of Chemical Tech & Biotech

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BackgroundThe presence of a wide range of persistent toxic organic pollutants in industrial effluents poses a serious threat to human and environmental health, emphasizing the necessity for developing cost‐effective methods for treating toxic effluents. This study focuses on the synthesis, characterization, and evaluation of metal oxide (iron, copper and zinc) doped clay composite for the sono‐catalytic degradation of nitrobenzene (NB) in the presence of ultrasound.Results and ConclusionsAmong the metal oxides studied, copper and iron oxide modified clay have performed better in the degradation of NB (~99% in the presence of air) compared to ZnO/clay composite. Process optimization studies were carried with CuO/clay composite at different pH (2.5 – 11.5), feed concentrations (50 – 200 mg/L), and catalyst loadings (0.25 – 1.0 g/L). Neutral pH conditions and higher catalyst loadings of 1 g/L were found to be optimal for the efficient degradation of 50 ppm NB. Among the scavengers tested, ethylenediamine tetra acetic acid (EDTA) exhibited strong scavenging effects, resulting in reduced NB degradation compared to isopropyl alcohol (IPA) and tin tetra chloride (SnCl4), regardless of the scavenger concentration (0.5 mM and 40 mM). The catalyst was found to be stable enough up to 4 cycles under identical conditions. Additionally, these materials were also found to be effective in the degradation of other different pollutants (Terephthalic acid (TPA), Rhodamine‐B (Rh‐B), Ciprofloxacin). These findings contribute to the development of cost‐effective strategies for the treatment of industrial effluents, reducing the risks posed to both the environment and human health.This article is protected by copyright. All rights reserved.

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Photocatalytic degradation of aqueous Congo red dye pollutants by rare-earth metal oxide (CeO2) nanorods

Rianjanu,

Mustamin,

Melati

et al. 2024

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Performance comparison of photocatalysts for degradation of organic pollutants using experimental studies supported with DFT and fundamental characterization

Cited by 8 publications

References 50 publications

Key Role of Corncob Based-Hydrochar (HC) in the Enhancement of Visible Light Photocatalytic Degradation of 2,4-Dichlorophenoxyacetic Acid Using a Derivative of ZnBi-Layered Double Hydroxides

Key Role of Corncob Based-Hydrochar (HC) in the Enhancement of Visible Light Photocatalytic Degradation of 2,4-Dichlorophenoxyacetic Acid Using a Derivative of ZnBi-Layered Double Hydroxides

Sonocatalytic degradation of nitrobenzene with metal oxide clay nanocomposites

Photocatalytic degradation of aqueous Congo red dye pollutants by rare-earth metal oxide (CeO2) nanorods

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