Photocatalytic degradation of reactive black 5 azo dye by zinc sulfide quantum dots prepared by a sonochemical method

Goharshadi, Elaheh Kafshdare; Hadadian, Mahboubeh; Karimi, Mahdi; Azizi‐Toupkanloo, Hossein

doi:10.1016/j.mssp.2013.03.005

Cited by 56 publications

(22 citation statements)

References 52 publications

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“…This result is in agreement with information that reported in references [21] [25]. On basis on calculated data from Figure 4(a) and Figure 4(b), the values of activation energy and the essential thermodynamics parameters that are listed in Table 1.…”

Section: T Jaafar Journal Of Geoscience and Environment Protectionsupporting

confidence: 92%

UV-A Activated ZnO Mediated Photocatalytic Decolorization of Nigrosine (Acid Black 2) Dye in Aqueous Solution

Jaafar¹

2017

GEP

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The present study deals with studied the essential requirements for photo-decoulorization of nigrosine dye with suspension solution of photocatalyst ). A kinetics study of photo-decolourization for this dye was obeyed to pseudo-first order. The best initial pH of decolorization at 25 mg/L of dye solution with 300 mg of ZnO was given a fast reaction at 8.17. The calculated activation energy for this photoreaction was found to be 31.549 kJ·mol −1 . Thermodynamically, the reaction is exothermic and spontaneously. The efficiency of decolorizatio E% was 97.077 at 15 min that decreased with addition oxidant reagents such as H 2 O 2 , Fe 2+ and mixture from them.

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Section: T Jaafar Journal Of Geoscience and Environment Protectionsupporting

confidence: 92%

UV-A Activated ZnO Mediated Photocatalytic Decolorization of Nigrosine (Acid Black 2) Dye in Aqueous Solution

Jaafar¹

2017

GEP

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“…Their removal is very hard because they are stable against light, heat, and oxidants. One of the most appealing dye removal techniques is the use of a heterogeneous photocatalysts such as TiO 2 , [3,4] ZnO, [5] ZnS, [6,7] and WO 3 . [8] Unfortunately, most of photocatalysts are active under ultraviolet light because of their large band gaps.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Solar‐Catalytic Degradation of Reactive Black 5 Dye Using Mesoporous Plasmonic Ag/g‐C₃N₄ Nanocomposites

2020

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An azo dye, Reactive Black 5 (RB5), was degraded by three photocatalysts of g‐C3N4, Ag(2 %)/g‐C3N4, and Ag(5 %)/g‐C3N4 with the specific surface areas of 34.41, 28.70, and 35.58 m2 g−1 and the band gaps of 2.52, 1.56, and 1.71 eV under sunlight illumination, respectively. The results showed 40 mg/L of g‐C3N4 could degrade completely 10 ppm RB5 at pH 3.4 within 10 min under sunlight irradiation with the first‐order rate constant of 0.312 min−1. Under the same conditions, the complete degradation time of RB5 reduced to 5 and 7 min when the plasmonic nanocomposites of Ag (2 %)/g‐C3N4 and Ag (5 %)/g‐C3N4 were used as photocatalysts, respectively. Ag content had an important influence on the photocatalytic activity of g‐C3N4 against RB5 so that Ag (2 %)/g‐C3N4 possessed the best photocatalytic efficiency with the rate constant of 0.795 min−1. In fact, Ag nanoparticles through the surface plasmon resonance effects and by accepting the photogenerated electrons could improve the visible‐light absorption and increase charge separation of g‐C3N4. The results showed superoxide radical is the main oxidant in the photodegradation of RB5.

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“…Entering organic dyes from industrial effluents to ground and surface water has negative impacts for ecosystems and humans due to the their toxic, carcinogenic and mutagenic properties [1,2]. Triphenylmethane dyes, such as dicationic methyl green (MG), are one of the most common organic water pollutants and the cationic one has found widespread uses as colorants in industry and as antimicrobial agents [3].…”

Section: Introductionmentioning

confidence: 99%

As-synthesized ZSM-5 zeolite as a suitable support for increasing the photoactivity of semiconductors in a typical photodegradation process

Ghahfarokhi

Nezamzadeh‐Ejhieh

2015

Materials Science in Semiconductor Processing

100

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Photocatalytic degradation of reactive black 5 azo dye by zinc sulfide quantum dots prepared by a sonochemical method

Cited by 56 publications

References 52 publications

UV-A Activated ZnO Mediated Photocatalytic Decolorization of Nigrosine (Acid Black 2) Dye in Aqueous Solution

UV-A Activated ZnO Mediated Photocatalytic Decolorization of Nigrosine (Acid Black 2) Dye in Aqueous Solution

Highly Efficient Solar‐Catalytic Degradation of Reactive Black 5 Dye Using Mesoporous Plasmonic Ag/g‐C₃N₄ Nanocomposites

As-synthesized ZSM-5 zeolite as a suitable support for increasing the photoactivity of semiconductors in a typical photodegradation process

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Photocatalytic degradation of reactive black 5 azo dye by zinc sulfide quantum dots prepared by a sonochemical method

Cited by 56 publications

References 52 publications

UV-A Activated ZnO Mediated Photocatalytic Decolorization of Nigrosine (Acid Black 2) Dye in Aqueous Solution

UV-A Activated ZnO Mediated Photocatalytic Decolorization of Nigrosine (Acid Black 2) Dye in Aqueous Solution

Highly Efficient Solar‐Catalytic Degradation of Reactive Black 5 Dye Using Mesoporous Plasmonic Ag/g‐C3N4 Nanocomposites

As-synthesized ZSM-5 zeolite as a suitable support for increasing the photoactivity of semiconductors in a typical photodegradation process

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Highly Efficient Solar‐Catalytic Degradation of Reactive Black 5 Dye Using Mesoporous Plasmonic Ag/g‐C₃N₄ Nanocomposites