Well-designed Ag/ZnO/3D graphene structure for dye removal: Adsorption, photocatalysis and physical separation capabilities

Kheirabadi, Malihe; Samadi, Morasae; Asadian, Elham; Zhou, Yi; Dong, Chunyang; Zhang, Jinlong; Moshfegh, A.Z.

doi:10.1016/j.jcis.2018.10.102

Cited by 125 publications

(30 citation statements)

References 69 publications

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“…In this respect, the removal of nitroaryl derivative compounds is an exhaustive area of research [1][2][3][4]. Among them, nitrobased aromatic organic compounds produced as by-products during manufacturing of chemicals, dyes, and pharmaceutical products are recommended as the most toxic compound [5,6]. Nitroaryl compounds, at very low ppm concentration, are considered as most hazardous industrial compounds because of its high stability and solubility in water [7,8].…”

Section: Introductionmentioning

confidence: 99%

Mussel-inspired Ag/poly(norepinephrine)/MnO2 heterogeneous nanocatalyst for efficient reduction of 4-nitrophenol and 4-nitroaniline: an alternative approach

et al. 2020

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Noble metal-based surface chemistry is a well-practiced domain on interest in catalysis. A newborn in mussel-inspired coating based on catecholic chemistry, poly(norepinephrine) (PNE), has been synthesized via cyclization polymerization technique over MnO 2 nanosheets. The physisorped PNE macromolecular chains over MnO 2 nanosheets act as green reducing agent for silver ions resulting in arresting the quasi-spherical silver nanoparticles distributed over the MnO 2-PNE assembly. The catalytic activity was performed against nitroaryl molecules which evidenced fast reduction with pseudo-first-order kinetics. The superiority which lies in this work is their facile preparation, high surface area due to sheet-like morphology, and fast catalytic reduction. These practical observations spread its window as nanocatalyst toward environmental remediation of hazardous nitroaryl compounds.

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Section: Introductionmentioning

confidence: 99%

Mussel-inspired Ag/poly(norepinephrine)/MnO2 heterogeneous nanocatalyst for efficient reduction of 4-nitrophenol and 4-nitroaniline: an alternative approach

et al. 2020

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“…The TiO 2 particles could offer a large photoactivity effect and notably degrade the dye molecules (Figure 2a). In another relevant study, Kheirabadi et al [18] synthesized a ternary nanostructure composed of Ag nanoparticle/ZnO nanorod/3-dimensional graphene (3DG) network via a coupled hydrothermal-photodeposition technique. While the 3DG can capture 300 mg/g MB dye by an adsorption process, Ag/ZnO component brings about the possibility of photodecomposition of the dye even under visible light irradiation.…”

Section: Nanomaterials For Adsorption and Photodecompositionmentioning

confidence: 99%

Section: Nanomaterials For Adsorption and Photodecompositionmentioning

confidence: 99%

An Overview of the Water Remediation Potential of Nanomaterials and Their Ecotoxicological Impacts

Ghadimi

Zangenehtabar

Homaeigohar

2020

Water

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Nanomaterials, i.e., those materials which have at least one dimension in the 1–100 nm size range, have produced a new generation of technologies for water purification. This includes nanosized adsorbents, nanomembranes, photocatalysts, etc. On the other hand, their uncontrolled release can potentially endanger biota in various environmental domains such as soil and water systems. In this review, we point out the opportunities created by the use of nanomaterials for water remediation and also the adverse effects of such small potential pollutants on the environment. While there is still a large need to further identify the potential hazards of nanomaterials through extensive lab or even field studies, an overview on the current knowledge about the pros and cons of such systems should be helpful for their better implementation.

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“…In order to improve the adsorption and dye degradation efficiency by using graphene-based nanomaterials, along with co-catalysts, noble metal particles, metallic, non-metallic doping and with hydrogels have been used [ 18 ]. Even though many researchers reported on the dye degradation of RhB, our work using graphene based nickel nanocomposite (RGO–Ni) showed better adsorption efficiency than adsorption for removing RhB dye compared to that of other adsorbents like TiO 2 and graphene TiO 2 [ 19 ], CuS/PVA nanocomposite [ 20 ], ZnO–MnO 2 [ 21 ], and other self-assembled GO nanostructures from various styles [ 22 , 23 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Adsorptive removal of Rhodamine B dye from aqueous solution by using graphene–based nickel nanocomposite

Jinendra

Bilehal

Nagabhushana³

et al. 2021

Heliyon

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In this work, reduced graphene oxide-nickel (RGO–Ni) nanocomposite is synthesized. X-ray diffraction (XRD), scanning electron microscopy (SEM) and SEM–EDS (Energy Dispersive X-Ray Spectroscopy) are used to study the crystalline nature, morphology and elemental composition of the RGO–Ni nanocomposite, respectively. As synthesized RGO–Ni nanocomposite is used to develop selective adsorptive removal of Rhodamine B (RhB) dye from the aqueous solution. The experiments have been performed to investigate RhB uptake via RGO–Ni nanocomposites which include, contact time (60 min), initial dye concentration (50 mg/100 ml), adsorbent dosage (0.5 mg) and pH 8 of dye solution. The equilibrium concentration is determined by using different models namely, Freundlich, Langmuir and Tempkin. Langmuir isotherm has been fitted well. Langmuir and Tempkin equations are determined to have good agreement with the correlation coefficient data. The kinetic study concluded that RhB dye adsorption follows with the pseudo-second-order kinetic model. Further, adsorption mechanism of RGO–Ni is proposed which involves three steps. The synthesized adsorbent is compared with the other adsorbents in the literature and indicates that RGO–Ni nanocomposite used in this study shown better results for a particular adsorption capacity than polymeric, natural and synthetic bioadsorbents. The regeneration and reusability experiments suggest RGO–Ni nanocomposite can be used for many numbers of times for purification/adsorption.

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Well-designed Ag/ZnO/3D graphene structure for dye removal: Adsorption, photocatalysis and physical separation capabilities

Cited by 125 publications

References 69 publications

Mussel-inspired Ag/poly(norepinephrine)/MnO2 heterogeneous nanocatalyst for efficient reduction of 4-nitrophenol and 4-nitroaniline: an alternative approach

Mussel-inspired Ag/poly(norepinephrine)/MnO2 heterogeneous nanocatalyst for efficient reduction of 4-nitrophenol and 4-nitroaniline: an alternative approach

An Overview of the Water Remediation Potential of Nanomaterials and Their Ecotoxicological Impacts

Adsorptive removal of Rhodamine B dye from aqueous solution by using graphene–based nickel nanocomposite

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