Homogeneous photocatalytic degradation of azo dye Reactive Black 5 using Fe(III) ions under visible light

Sadhu, Shailaja P; Ruparelia, Jayesh; Patel, Upendra D.

doi:10.1080/09593330.2020.1782995

Cited by 17 publications

(4 citation statements)

References 34 publications

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“…Furthermore, RB5 degradation was investigated using ferric ions as the catalyst under UV light and sunlight by Sadhu et al. [29] . Besides this, the process conditions also affected photocatalytic efficiency for RB5 photodegradation, as reported by Kritikos et al..…”

Section: Introductionmentioning

confidence: 93%

“…[28] Furthermore, RB5 degradation was investigated using ferric ions as the catalyst under UV light and sunlight by Sadhu et al. [29] Besides this, the process conditions also affected photocatalytic efficiency for RB5 photodegradation, as reported by Kritikos et al. They determined that the scavenging effect was hindered by adding H 2 O 2 , and better photocatalytic performance was obtained with simultaneous usage of ultraviolet and ultrasound irradiation.. [30] Moreover, the modifying catalyst increases the photocatalytic activity for RB5 removal.…”

Section: Introductionmentioning

confidence: 98%

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Comparative Photocatalytic Activity and Total Organic Carbon Removal Efficiency of TiO₂ And ZnO for Reactive Black 5 Photodegradation

et al. 2023

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The photocatalytic performance of TiO2 and ZnO was comparatively studied for photocatalytic degradation of reactive black 5 (RB5) under artificial UVC irradiation. The effect of initial solution pH, catalyst concentration, initial RB5 concentration, purging oxygen rate, stirring rate, and process temperature on the degradation process by TiO2 and ZnO was investigated. In addition, total organic carbon (TOC) analysis has been employed for each parameter to detect the presence of organic intermediates and the photodegradation performance of catalysts simultaneously with the photocatalytic degradation process. The RB5 photodegradation was more rapid in the aqueous medium by TiO2 under UVC irradiation compared to the catalysis by ZnO. On the other hand, the slower photocatalysis by ZnO resulted in generating more organic intermediates. The structural and morphological analyses of photocatalysts TiO2 and ZnO were performed using XRD and FE‐SEM techniques. The UV‐vis spectroscopy measurements supported that the TiO2 demonstrated evidently better photocatalytic activity than ZnO for RB5 degradation.

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Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 98%

Comparative Photocatalytic Activity and Total Organic Carbon Removal Efficiency of TiO₂ And ZnO for Reactive Black 5 Photodegradation

et al. 2023

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“…The use of ferric (Fe(III)) ions in homogenous photocatalysis appears to be an efficient and cost-effective approach of producing •OH radicals for dye degradation. Using ferric ions (Fe(III)) and visible light (VL) irradiation, the homogenous photocatalytic oxidation (PCO) of Reactive Black 5 (RB5) dye was investigated (SL) by Sadhu et al (2020). Under artificial VL, more over 80% of the original 20 mg/L RB5 was decolorized in 60 min in the presence of 5 mM ferric ions at pH 2.6.…”

Section: Homogenous Photocatalysismentioning

confidence: 99%

Recent advances in the elimination of persistent organic pollutants by photocatalysis

Gaur

Dutta

Singh

et al. 2022

Front. Environ. Sci.

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The non-ending needs of growing human population are being met by rapid industrialization and globalization, which have nowadays become an indispensable component of growth. Although these activities have led to phenomenal growth of the human civilization, at the same time, they have resulted in severe environmental pollution by discharge of highly toxic waste. This waste is severely detrimental not only for the environment but also for the health of the human population. Among different classes of pollutants, one being considered as one of the highly toxic ones is that of persistent organic pollutants (POPs). Advanced oxidation technologies (AOTs) play a major role in the degradation of pollutants by converting organic pollutants into CO2, H2O, and mineralized inorganic ions. AOTs include UV-based photocatalysis, ozonation, electrochemical oxidation, and Fenton and Fenton-like processes There are some difficulties and challenges associated with AOT, such as being highly capital intensive and high consumption of energy. To overcome these bottlenecks, photocatalytic degradation is a promising method that uses solar energy for the degradation of such pollutants. Photocatalysis is further classified into homogenous and heterogenous photocatalysis. As a part of heterogenous photocatalysis, semiconductor photocatalysts have received great attention; but because of their drawbacks such as the recombination of the electron/hole pair, low adsorption rate, and low surface area coverage, nanotechnology was considered for bringing a novel and enhanced remediation photocatalysis process. To this end, the designing of a more efficient photocatalyst by modifying morphology, composition, and structure and reducing toxicity is the need of the hour for the abatement of environmental pollutants. This review focuses on the degradation and removal of highly toxic persistent organic pollutants by using photocatalytic degradation with a detailed account of the various pollutants, their degradation mechanism, process shortcomings, remedial measures, and future prospects.

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“…The proposed work showed better results than previously reported (Table 1, Scheme 1). [14,25,[32][33][34][35][36][37]…”

Section: Effect Of Dye Concentrationmentioning

confidence: 99%

Chemical Degradation and Decolorization of Reactive Black B With an Inorganic Oxidant in Acidic Medium

et al. 2022

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Due to the wide applications of the Reactive Black B (RB−B) in textile industries, it is largely present within the aqueous environment which is a serious environmental threat. Previous studies were unsuccessful to completely remove the color of RB−B from the contaminated environment. In this work, the decolorization of aqueous solutions with RB−B was performed by Potassium bromate. It was found to be a promising oxidizing agent for chemical degradation of organic pollutant. The decolorization and degradation of Reactive Black B by potassium bromate in an aqueous acidic medium was carried out at 591 nm spectrophotometrically at laboratory scale. The reaction was studied under pseudo order conditions having concentration of BrO3− in excess than dye. Under constant conditions, the reaction was found to be first order with respect to both oxidant and reductant. The kinetic salt effect of added salt for the determination of reactive species in the rate‐determining step showed that the rate of reaction is directly related to the increasing concentration of salt, suggesting that two same charged species are involved in the rate‐determining step. Activation parameters were also calculated for the reaction. The highest decolorization percentage of RB−B (99 %) was obtained showing almost complete removal of color of dye from aqueous medium. The proposed degradation of RB−B with bromate was confirmed by qualitative and analytical tests (TDS, EC, UV‐Visible and FTIR spectroscopy).

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Homogeneous photocatalytic degradation of azo dye Reactive Black 5 using Fe(III) ions under visible light

Cited by 17 publications

References 34 publications

Comparative Photocatalytic Activity and Total Organic Carbon Removal Efficiency of TiO₂ And ZnO for Reactive Black 5 Photodegradation

Comparative Photocatalytic Activity and Total Organic Carbon Removal Efficiency of TiO₂ And ZnO for Reactive Black 5 Photodegradation

Recent advances in the elimination of persistent organic pollutants by photocatalysis

Chemical Degradation and Decolorization of Reactive Black B With an Inorganic Oxidant in Acidic Medium

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Homogeneous photocatalytic degradation of azo dye Reactive Black 5 using Fe(III) ions under visible light

Cited by 17 publications

References 34 publications

Comparative Photocatalytic Activity and Total Organic Carbon Removal Efficiency of TiO2 And ZnO for Reactive Black 5 Photodegradation

Comparative Photocatalytic Activity and Total Organic Carbon Removal Efficiency of TiO2 And ZnO for Reactive Black 5 Photodegradation

Recent advances in the elimination of persistent organic pollutants by photocatalysis

Chemical Degradation and Decolorization of Reactive Black B With an Inorganic Oxidant in Acidic Medium

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Product

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Comparative Photocatalytic Activity and Total Organic Carbon Removal Efficiency of TiO₂ And ZnO for Reactive Black 5 Photodegradation

Comparative Photocatalytic Activity and Total Organic Carbon Removal Efficiency of TiO₂ And ZnO for Reactive Black 5 Photodegradation