Diverse catalytic behavior of a dye-based polymer metal-free catalyst for hydrogen peroxide photoproduction

Qiang, Hong; Wu, Qi‐Hui; Wu, Zhenyu; Liu, Yan; Li, Yang; Huang, Hui; Liu, Yang; Kang, Zhenhui

doi:10.1039/d2ma00162d

Cited by 2 publications

(1 citation statement)

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“…O 2 reduction produces H 2 O 2 in the same way, but the reaction of water oxidation depletion holes is partially replaced by catalyst self-sacrifice. Also, due to the presence of the self-sacrificial reaction, the H 2 O 2 generation upsurges significantly (Hong et al 2022). Moreover, as AS is rich in aluminum the displacement of a water molecule is signified a favorable process.…”

Section: Effect Of As Calcination Temperature On the Catalytic Activitymentioning

confidence: 99%

Identifying optimized conditions for developing dewatered alum sludge-based photocatalyst to immobilize a wide range of dye contamination

et al. 2022

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In the current investigation, the removal of Levafix Fast Red CA (LFR) and Levafix Amber CA (LA) azo-dyes from aqueous media using the Fenton/adsorption processes has been carried out. The water treatment by-product, namely alum sludge (AS), was successfully collected and calcined to various temperatures, i.e., 400, 600 and 800 °C, then tested for use as a catalyst in the Fenton/adsorption processes. Fourier transform infrared (FT-IR) transmittance spectrum analysis and Transmission electron microscopy techniques (TEM) were applied to investigate the structural and morphological properties of such a catalyst. The results displayed that the calcined AS at 400 °C (AS400) showed the best photocatalytic activity under ultraviolet illumination and sunlight irradiation. The results indicated that the adsorption/Fenton’s oxidation systems are efficient for treatment and eliminating such types of reactive dyes. The oxidation reaction using Fenton’s reagent reached 99.9 and 86% removal for LFR and LA dyes, respectively. The operating conditions revealed that the reaction was maximized at the operational parameters of 1 g/L and 800 mg/L for AS400 and H2O2 at acidic pH (3.0). The process of single dyes was studied either from thermodynamic and kinetic viewpoints and the data exhibited that the reaction is followed a pseudo-second- order kinetic model and an exothermic reaction nature. The practical application of such byproduct waste used as a photocatalyst source through using natural solar radiation introduces an industrial ecology approach in treating dye effluents for safer environment.

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Section: Effect Of As Calcination Temperature On the Catalytic Activitymentioning

confidence: 99%

Identifying optimized conditions for developing dewatered alum sludge-based photocatalyst to immobilize a wide range of dye contamination

et al. 2022

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Dye-sensitized Bi2MoO6 for highly efficient photocatalytic degradation of levofloxacin under LED light irradiation

Wei

Fan

Zhang

et al. 2023

Materials Today Sustainability

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Diverse catalytic behavior of a dye-based polymer metal-free catalyst for hydrogen peroxide photoproduction

Abstract: Metal-free polymer-based catalysts have shown promising photocatalytic performance for efficient hydrogen peroxide (H2O2) photoproduction under visible light. While, the structure of active site and interface charge transfer of catalyst have...

Cited by 2 publications

References 50 publications

Identifying optimized conditions for developing dewatered alum sludge-based photocatalyst to immobilize a wide range of dye contamination

Identifying optimized conditions for developing dewatered alum sludge-based photocatalyst to immobilize a wide range of dye contamination

Dye-sensitized Bi2MoO6 for highly efficient photocatalytic degradation of levofloxacin under LED light irradiation

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