The construction of bio-inspired hierarchically porous graphene aerogel for efficiently organic pollutants absorption

Qin, Yan; Xue, Chunlong; Yu, Haoran; Wen, Yutong; Zhang, Lina; Liu, Ying

doi:10.1016/j.jhazmat.2021.126441

Cited by 17 publications

(6 citation statements)

References 48 publications

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“…Because these parameters can influence the sorption behavior of a contaminant and its transformation products, as well as the lifetime and charge recombination, differences in the Brunauer-Emmett-Teller (BET) surface, impurities, lattice structure, or existence of hydroxyl functional groups are likely to influence the photodegradation rates (Kumar et al 2020;Antonopoulou et al 2021;Qin et al 2021).…”

Section: Type and Composition Of The Catalystmentioning

confidence: 99%

“…A difference in the number of wastewater pollutants will require varied irradiation periods to obtain optimum degradation with specific operational parameters. Because photocatalysis reactions are photonic in nature, an overly high concentration of organic substances has been shown to gradually block the titanium dioxide surface and impair light absorption, resulting in photocatalyst inactivation (Zhao et al 2019a;Gora and Andrews 2019;Qin et al 2021;Yang et al 2021b). Many investigations discovered that as the initial concentration of the pollutant was raised, the photocatalytic degradation efficiency declined (Dong et al 2022;Pan et al 2022;Yue et al 2022).…”

Section: Concentrations Of Hazardous Contaminantsmentioning

confidence: 99%

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Solar photo-oxidation of recalcitrant industrial wastewater: a review

et al. 2022

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Conventional methods to clean wastewater actually lead to incomplete treatments, calling for advanced technologies to degrade recalcitrant pollutants. Herein we review solar photo-oxidation to degrade the recalcitrant contaminants in industrial wastewater, with focus on photocatalysts, reactor design and the photo-Fenton process. We discuss limitations due to low visible-light absorption, catalyst collection and reusability, and production of toxic by-products. Photodegradation of refractory organics by solar light is controlled by pH, photocatalyst composition and bandgap, pollutant properties and concentration, irradiation type and intensity, catalyst loading, and the water matrix.

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Section: Type and Composition Of The Catalystmentioning

confidence: 99%

Section: Concentrations Of Hazardous Contaminantsmentioning

confidence: 99%

Solar photo-oxidation of recalcitrant industrial wastewater: a review

et al. 2022

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“…[9][10][11] Aerogel has gained widespread attention as a landmark adsorbent in dye wastewater treatment due to its exclusive properties such as low density, large surface area, and high porosity. [12][13][14][15][16][17] Natural, inexpensive and renewable polymers have been widely studied and applied in aerogels. [18][19][20][21] Gelatin (GEL), a biopolymer derived from collagen, is widely available and contains abundant hydrophilic groups.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Porous Aerogels With Multiple Adsorptive Interactions for Dye Wastewater Purification

Gao,

Xu,

Ren

et al. 2024

Chemistry A European J

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Aerogels present a huge potential for removing organic dyes from printing and dyeing wastewater (PDW). However, the preparation of aerogels with multiple dye adsorption capabilities remains a challenge, as many existing aerogels are limited to adsorbing only a single type of dye. Herein, a composite aerogel (CG/T‐rGO) with the addition of carboxymethyl chitosan, gelatin and tannic acid reduced graphene oxide (T‐rGO) was synthesized by freeze‐drying technology. The electrostatic interactions between dye molecular and GEL/CMCS (CG) networks, as well as the supramolecular interactions (H‐bonds, electrostatic interactions and π‐π stacks) between T‐rGO, have endowed the aerogel with the ability to adsorb multiple types of dye, such as methylene blue (MB) and methyl orange (MO). Results exhibited that the prepared CG/T‐rGO aerogel possessed strong mechanical strength and a porous 3D network structure with a porosity of 96.33%. Using MB and MO as adsorbates, the adsorption capacity (88.2mg/g and 66.6 mg/g, respectively) and the mechanism of the CG/T‐rGO aerogel were investigated. The adsorption processes of aerogel for MB and MO were shown to follow the pseudo‐second‐order kinetic model and Langmuir isotherm model, indicating the chemical adsorption of a monolayer. The proposed aerogel in this work has promising prospects for dye removal from PDW.

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“…They will enter the human body along the food chain, causing varying degrees of damage to human organs, and even threatening human's life [1]. Currently, methods of removing organic pollutants include absorption [2,3], adsorption [4,5], membrane separation [6,7] and advanced oxidation process [8,9]. Among these treatment methods, the advanced oxidation process (AOP) is widely used in the treatment of some difficult to remove organic pollutants due to its good treatment effect and short treatment cycle.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Mechanism of Nano Zero-Valent Iron Activated Persulfate for Persistent Organic Pollutants in the Environment

Iribagiza

Liang

et al. 2022

Glob. Environ. Eng.

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The advanced oxidation process based on persulfate has a broad application prospect in the remediation of organic pollutants. As an effective, low-cost and environmentally friendly material, nano-zero-valent iron (nZVI) can effectively activate persulfate (nZVI/PS) to generate strongly oxidizing sulfate radical for removing organic pollutants in the environment. In this review, we first clarify the activation pathway of nZVI activated persulfate including direct activation and indirect activation. Direct activation means that the electrons released by nZVI directly participate in the activation of PS; indirect activation means that Fe0 corrodes to generate Fe2+, and Fe2+ further activate the persulfate. Then, the mechanism of nZVI/PS system to degrade organic pollutants including electron transfer, hydrogen extraction and addition reactions are also discussed. Finally, combined with the activation pathway and the mechanism of degrading organic pollutants, we propose several prospects for the future research direction of nZVI activated persulfate. As a result, this review provides a theoretical basis for the nZVI/PS advanced oxidation system to remediate actual sites contaminated with organic pollutants.

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The construction of bio-inspired hierarchically porous graphene aerogel for efficiently organic pollutants absorption

Cited by 17 publications

References 48 publications

Solar photo-oxidation of recalcitrant industrial wastewater: a review

Solar photo-oxidation of recalcitrant industrial wastewater: a review

Hierarchical Porous Aerogels With Multiple Adsorptive Interactions for Dye Wastewater Purification

Enhanced Mechanism of Nano Zero-Valent Iron Activated Persulfate for Persistent Organic Pollutants in the Environment

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