Advances of graphene oxide based nanocomposite materials in the treatment of wastewater containing heavy metal ions and dyes

Joshi, Naveen Chandra; Gururani, Prateek

doi:10.1016/j.crgsc.2022.100306

Cited by 50 publications

(18 citation statements)

References 116 publications

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“…They are very difficult to remove from water and wastewater because of their high solubility. Most dyes irritate the skin, induce headaches, harm the eyes, cause coughing and nausea, skin discoloration, suppress the immune system, and cause other health issues [34,35]. Metal oxide based photocatalysts show charge transport properties, adequate electronic structure, and ability to adsorb suitable radiation.…”

Section: Photo-catalytic Activity Of Sno2 Nps and Its Nanocompositesmentioning

confidence: 99%

“…Figure 3 depicts the mechanism of photocatalytic process. The overall photocatalytic process is affected by different operational parameters such as dye concentration, irradiation time, morphology of catalysts, dosage of photocatalyst, reaction temperature, pH of dye containing solution, and light intensity [34] (Fig. 4).…”

Section: Photo-catalytic Activity Of Sno2 Nps and Its Nanocompositesmentioning

confidence: 99%

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Advances in Sno<sub>2</sub>-Based Nanomaterials for Photocatalysis, Supercapacitors, and Antibacterial Activities

Joshi¹,

Singh²,

Upadhyay³

et al. 2022

Preprint

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Tin (IV) oxide nanoparticles (SnO2 NPs) have received a lot of interest because of their interesting features. SnO2 NPs have proven productive in a range of fields, including water purification, supercapacitors, batteries, antibacterial and antioxidant agents, and others. SnO2-based nanoparticles found a wide range of applications after incorporating materials with varying chemical compositions. SnO2 NPs and their nanocomposites have been used effectively as antibacterial agents against various pathogenic bacteria, photocatalysts for dye degradation, and electrode materials for supercapacitors (SCs). This article covers the characteristics of SnO2 NPs, SnO2 nanocomposite materials, applications of SnO2 NPs and their composite materials, including antibacterial, energy storage, and photocatalysis, as well as some significant recent studies.

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Section: Photo-catalytic Activity Of Sno2 Nps and Its Nanocompositesmentioning

confidence: 99%

Section: Photo-catalytic Activity Of Sno2 Nps and Its Nanocompositesmentioning

confidence: 99%

Advances in Sno<sub>2</sub>-Based Nanomaterials for Photocatalysis, Supercapacitors, and Antibacterial Activities

Joshi¹,

Singh²,

Upadhyay³

et al. 2022

Preprint

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show abstract

“…Adsorption is a highly sensitive technique; capable of removing even at very low concentrations of pollutants. [4] It is a surface phenomenon that involves a threecomponent system, namely the adsorbent, adsorbate, and wastewater. The interaction between the adsorbent and the adsorbate controls the entire adsorption process.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Anionic Dyes by Polypyrrole‐Grafted Mesoporous SBA‐15 Composite: Isotherms, Kinetics, Thermodynamics, Interaction Mechanism and Recycling

Prashanna Suvaitha,

Venkatachalam

2023

ChemistrySelect

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SBA‐15/polypyrrole composite was synthesized by polymerizing pyrrole in the presence of SBA‐15. The samples were characterized using the following techniques: low‐angle XRD, wide‐angle XRD, FTIR, FESEM, TGA, HRTEM, and BET. From the low‐angle XRD analysis, it confirms the formation of a mesoporous hexagonal structure (p6 mm). From the HRTEM image, an orderly arrangement of mesopores is evident. Using adsorption techniques, our objective is to remove sunset yellow, indigo carmine, titan yellow, and orange G dye from aqueous solutions with SBA‐15/polypyrrole composite. The removal efficiency for all the dyes was greater than 90 %. The isotherm was verified to follow the Langmuir isotherm model. The maximum adsorption capacities for sunset yellow, indigo carmine, titan yellow, and Orange G were found to be 78.74 mg/g, 83.33 mg/g, 78.74 mg/g, and 106.38 mg/g, respectively. The adsorption kinetics followed a pseudo‐second‐order model, and the R2 value was greater than 0.99 for all the dyes. The thermodynamic parameters of ΔG°, ΔS°, and ΔH° showed negative values, indicating that the adsorption was spontaneous, decreased entropy, and was exothermic. The recycling of the SBA‐15/polypyrrole composite resulted in a 90 % removal efficiency for three cycles. Therefore, the present adsorbent could be applied to treat industrial effluents that contain these dyes.

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“…Examples include superparamagnetic fibrous adsorbents used in the removal of U(VI) [ 28 ], Eu(III) [ 29 ], Cr(VI) [ 30 ], arsenic ions [ 31 ], Congo red [ 26 ] and malachite green oxalate organic dyes [ 32 ], as well as antibiotics such as tetracycline [ 30 , 33 ], from synthetic aqueous media and urban wastewater (UWW). It was expected that the development of functionalized magnetic nanomaterials exhibiting high surface areas and high saturation magnetization such as magnetically functionalized graphene-based nanocomposites [ 34 ] would further promote the generation of highly effective magnetoactive adsorbents with potential to be used in water-remediation processes [ 35 , 36 , 37 , 38 , 39 ].…”

Section: Introductionmentioning

confidence: 99%

Ofloxacin Removal from Aqueous Media by Means of Magnetoactive Electrospun Fibrous Adsorbents

et al. 2022

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Functionalized electrospun polymer microfibrous membranes were fabricated by electrospinning and further surface-functionalized with magnetic iron oxide (FexOy) nanoparticles to yield magnetoactive nanocomposite fibrous adsorbents. The latter were characterized in respect to their morphology, mechanical properties and magnetic properties while they were further evaluated as substrates for removing Ofloxacin (OFL) from synthetic aqueous media and secondary urban wastewater (UWW) under varying physicochemical parameters, including the concentration of the pharmaceutical pollutant, the solution pH and the membranes’ magnetic content. The magnetic-functionalized fibrous adsorbents demonstrated significantly enhanced adsorption efficacy in comparison to their non-functionalized fibrous analogues while their magnetic properties enabled their magnetic recovery and regeneration.

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Advances of graphene oxide based nanocomposite materials in the treatment of wastewater containing heavy metal ions and dyes

Cited by 50 publications

References 116 publications

Advances in Sno<sub>2</sub>-Based Nanomaterials for Photocatalysis, Supercapacitors, and Antibacterial Activities

Advances in Sno<sub>2</sub>-Based Nanomaterials for Photocatalysis, Supercapacitors, and Antibacterial Activities

Adsorption of Anionic Dyes by Polypyrrole‐Grafted Mesoporous SBA‐15 Composite: Isotherms, Kinetics, Thermodynamics, Interaction Mechanism and Recycling

Ofloxacin Removal from Aqueous Media by Means of Magnetoactive Electrospun Fibrous Adsorbents

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