Sunlight-promoted photodegradation of Congo red by cadmium-sulfide decorated graphene aerogel

Kaushik, Jaidev; Himanshi,; Kumar, Vinit; Tripathi, Kumud Malika; Sonkar, Sumit Kumar

doi:10.1016/j.chemosphere.2021.132225

Cited by 78 publications

(39 citation statements)

References 65 publications

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“…The graphitization of the synthesized material was assessed by Raman spectroscopy. Two distinct peaks appeared at ∼1367 and 1577 cm –1 corresponding to the A 1g and E 2g vibrational modes of the D and G bands of the carbonaceous material, respectively (Figure i). , The intensity ratio of the D to G peak was 0.7, which further confirms the defective structure and disorderliness of f-GNS associated with a high density of surface functionalization induced by mild acid oxidation . The XRD spectrum of f-GNS (Figure j) shows an intense dominant peak at 2θ = 24.6° corresponding to the (002) reflection of graphitic carbon, which suggests a high degree of graphitization .…”

Section: Resultsmentioning

confidence: 64%

Biomass-Based Functionalized Graphene for Self-Rechargeable Zinc–Air Batteries

Das

Hwang

Jang

et al. 2022

ACS Appl. Energy Mater.

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Commercial batteries are typically charged with electrical power systems and consume electrical energy for recharging. Chemically self-charging batteries are a class of electrochemical devices that use chemical reactions to recharge batteries without electrical grids. Herein, we report the fabrication of a self-rechargeable zinc–air battery that is capable of simultaneously harnessing and storing energy based on biomass-derived functionalized graphene nanosheets (f-GNS). The chemical energy was harnessed into electric power by the spontaneous and reversible redox reactions between the f-GNS and atmospheric oxygen. This enables the fabrication of an energy storage device capable of self-charging without using any catalyst or organic dye. For the realization of integrated energy harvesting, conversion, and storage by a facile and sustainable approach, the f-GNS synthesized by the hydrothermal carbonization of pears followed by mild acid oxidation was used as the active material in an alkaline solution. The self-rechargeable zinc–air battery delivered an initial open circuit voltage of ∼1.15 V and a maximum instantaneous peak power density of ∼250 mW cm–2. The zinc–air batteries can charge themselves at rest in 15 min and exhibit high reversibility and excellent durability over prolonged charge and discharge cycles. When connected in series and parallel, the zinc–air batteries can offer the desired voltage and current, respectively, for practical applications. This work opens an avenue for further advancement in the design of self-sustainable, next-generation aqueous zinc–air batteries for practical applications.

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Section: Resultsmentioning

confidence: 64%

Biomass-Based Functionalized Graphene for Self-Rechargeable Zinc–Air Batteries

Das

Hwang

Jang

et al. 2022

ACS Appl. Energy Mater.

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“…The surface functionalization with oxygenated functional groups or other hydrophilic moieties, such as monomeric or polymeric amines, is a widely used strategy to impart the water solubility and tune the physiochemical properties of nano-carbons. [99][100][101] Sun et al conducted a series of studies to investigate the influence of carbonyl, carboxylic, or hydroxyl groups on the peroxidase-like catalytic activity of graphene quantum dots (GQDs). 102 The deactivation of -COOH did not show any decrease in catalytic activity, while the deactivation of -OH and ketonic carbonyl groups increased and decreased the catalytic activity of GQDs, respectively.…”

Section: Effect Of Surface Functionalizationmentioning

confidence: 99%

Prospects of nano-carbons as emerging catalysts for enzyme-mimetic applications

et al. 2022

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“…92,93 Generally, in photocatalysis, the bombarding of photogenerated photons to organic contaminants in the presence of catalyst generates charge carriers, which triggers the formation of ROS to mineralize toxic organic molecules into small nontoxic entities. 39,94,95 There is negligible generation of toxic byproducts and sludge in photocatalysis, and both soluble and insoluble contaminants can be treated. The degradation efficiency, quantum yield, short lifetime of photogenerated charge carriers, and low utilization of visible light are significant constraints in the photocatalytic degradation process.…”

Section: Ferrite Based Nanostructures For the Removal Of Nitroaromaticsmentioning

confidence: 99%

Research Progress and Prospects of Spinel Ferrite Nanostructures for the Removal of Nitroaromatics from Wastewater

Bhaduri

Dikshit

Kim

et al. 2022

ACS Appl. Nano Mater.

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Spinel ferrite nanostructures have played significant roles in the development of materials science and technology. Spinel ferrite nanostructures possess not only promising magnetic properties but also high resistivity, stability, and low eddy current losses. The recent progress in the utilization of spinel ferrite nanostructures for water remediation is reviewed with special emphasis on the adsorption, transformation, degradation, and catalytic reduction of nitroaromatics. Then, the structure–property relationships and design considerations of spinel ferrite nanostructures for catalytic applications are discussed in detail. Insights into the details of the various removal processes on the model spinel ferrite nanostructures are provided with a basic concept of nitroaromatics remediation. Subsequently, reaction kinetics and mechanisms are classified and their advantages and disadvantages are described. Lastly, challenges and future perspectives of spinel ferrite nanostructures for their practical applications are presented. With further advancement, spinel ferrites have potential to be practically utilized for a wide range of applications such as water treatment plants.

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Sunlight-promoted photodegradation of Congo red by cadmium-sulfide decorated graphene aerogel

Cited by 78 publications

References 65 publications

Biomass-Based Functionalized Graphene for Self-Rechargeable Zinc–Air Batteries

Biomass-Based Functionalized Graphene for Self-Rechargeable Zinc–Air Batteries

Prospects of nano-carbons as emerging catalysts for enzyme-mimetic applications

Research Progress and Prospects of Spinel Ferrite Nanostructures for the Removal of Nitroaromatics from Wastewater

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