Graphene oxide clay nanocomposite as an efficient photo-catalyst for degradation of cationic dye

Gogoi, Jahnabi; Choudhury, Abhipsa Dev; Chowdhury, Devasish

doi:10.1016/j.matchemphys.2019.05.010

Cited by 28 publications

(10 citation statements)

References 15 publications

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“…As folhas de grafeno podem ser obtidas, ainda, de derivados do grafeno estabelecidos por processos de modificação ou por funcionalização de camadas de grafite, que apresentam geralmente melhor solubilidade em água e viabilidade em alguns processos de separação [3,95,96]. Outrossim, atualmente é crescente o interesse na funcionalização do grafeno, visando à aquisição de materiais para aplicações específicas [97]. Dentre esses derivados, o GO revela-se como material promissor.…”

Section: Estrutura E Obtenção De Camadas De Grafenounclassified

“…Novamente verificou-se, a partir das análises morfológicas de MEV e MET, que o material manteve a morfologia da MMT com algumas ondulações superficiais intrínsecas provenientes do GO. Os difratogramas de raios X mostraram que o d 001 aumenta de 1,25 para 1,50 nm, como observado no estudo anterior [125], e com diferentes extensões esse mesmo comportamento foi verificado [97]. Os resultados de DRX, apoiados pela análise de MET, ilustraram que o GO pode sofrer interações e ser depositado na superfície e/ou ser intercalado entre as camadas do argilomineral.…”

Section: Materiais Híbridos Baseados Em Grafeno E Mmt: Obtenção E Prounclassified

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Híbridos de grafeno/montmorillonita e óxido de grafeno/montmorillonita como nanomateriais funcionais: uma visão da literatura atual

et al. 2021

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Resumo Os híbridos derivados de grafeno ou óxido de grafeno e o argilomineral montmorillonita são materiais cuja matriz do filossilicato oferece estabilização das camadas nanométricas das estruturas carbonáceas, além de melhoramento das propriedade físico-químicas e da biocompatibilidade. Por sua vez, o grafeno e seus derivados agregam novas funcionalidades à montmorillonita e ao aumento da reatividade. Os materiais funcionais resultantes do sinergismo entre os constituintes têm sido explorados em diferentes aplicações, como em processos de remediação ambiental por meio de adsorção e catálise, ciência de materiais, áreas biológicas e biomédicas. No âmbito dessa revisão, as principais rotas para obtenção dos híbridos de grafeno e derivados com montmorillonita são apresentadas, relacionando os fatores estruturais e interações entre os constituintes para formação dos compósitos. Ainda os principais métodos de caracterização são discutidos e as aplicações mais recentes são relacionadas às características estruturais, morfológicas, térmicas e texturais.

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Section: Estrutura E Obtenção De Camadas De Grafenounclassified

Section: Materiais Híbridos Baseados Em Grafeno E Mmt: Obtenção E Prounclassified

Híbridos de grafeno/montmorillonita e óxido de grafeno/montmorillonita como nanomateriais funcionais: uma visão da literatura atual

et al. 2021

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“…Recently, carbon-rich materials have been used as adsorbents in water purification such as activated carbons [27][28][29][30], carbon nanotubes [25,[31][32][33][34][35], biochar [36][37][38][39], carbon fibers [40], and graphene oxides [41][42][43]. Furthermore, zeolites [44][45][46], silica [47][48][49] and clay-based nanocomposites [50][51][52] have also been employed as suitable materials in water treatment. In recent years, researchers have focused on waste biomass for the removal of dyes, and heavy metals for water treatment.…”

Section: Introduction To Magnetic Nanoparticlesmentioning

confidence: 99%

Insight on water remediation application using magnetic nanomaterials and biosorbents

Maksoud

Elgarahy

Farrell

et al. 2020

Coordination Chemistry Reviews

234

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Adsorption to date is the most effective and utilized technology globally to remove several pollutants in wastewater. In this approach, many adsorbents have been synthesized, tested and used for the elimination and separation of the contaminants such as radionuclides, heavy metals, dyes and pharmaceutical compounds both at lab and industrial scale. However, there are many challenges to adsorption processes such as reducing the high cost, through means of separation of suspending adsorbents to be used again, as well as the ease to synthesize. Two methods that have shown promising results and gained significant interest is that of magnetic nanomaterials and biosorbents due to their effective, safe, eco-friendly, low cost and low-energy intensive material properties. Magnetic nanomaterials act as efficient adsorbents due to their ease of removal of contaminants from wastewater using an applied magnetic field but also their advantageous surface charge and redox activity characteristics. On the other hand, biosorbents have a synergistic effect with their efficient adsorption capacity to remove contaminants, high abundance and participation in waste minimization, helping alleviate ecological and environmental problems. This review highlights, discusses and reports on the state-of-the-art of these two promising routes to adsorption and provides indications as to what are the optimum materials for utilization and insight into their efficiency, reusability and practicality for the removal of pollutants from wastewater streams. Some of the main material focuses are zero-valent iron, iron oxides, spinel ferrites, natural and waste-based biosorbents.

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“…Thermosetting nanocomposites based on glass fibers are emerging rapidly as potential replacements for their metal counterparts in different applications: [22][23][24][25] marine, sporting equipment, military structures, and automotive (automobiles and train) just to name a few. [26][27][28] These polymer nanocomposites have several advantages in terms of lightweight, which improve their speed and lower the energy consumption of vehicles.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Thermal Conductivity of Epoxy Resin Reinforced with Functionalized Graphene Nanosheets and Woven Glass Fabric

et al. 2021

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The reinforcing effects of functionalized graphene sheets (FGSs) on thermosetting epoxies are examined to understand the feasibility of these FGSs–epoxy nanocomposites in composite applications. The nanocomposites are prepared by compression molding with different graphene contents (0, 1, and 3 wt%) and different chemical treatments including FGSs and reduced graphene oxide (RGO) nanosheets. In addition, two silane molecules (octyltriethoxysilane [OTES] and glycidoxypropyltrimethoxysilane [GPTMS]) are used as coupling agents. Morphological analysis shows that the use of functionalized graphene oxide nanosheets in woven glass fabric/epoxy nanocomposites significantly improves the dispersion distribution of graphene nanosheets inside the matrix and increases their interfacial adhesion. The results reveal that the nanocomposites containing functionalized graphene nanosheets show the most promising improvement in terms of thermal and mechanical properties. In particular, Young's modulus increases by up to 17% and 25% with only 3% of functionalized graphene oxide using OTES and GPTMS, respectively. The result of the water droplet contact angle of the nanocomposites reinforced by graphene oxide functionalized by octyltriethoxysilane (OTES) shows an increase to a value of 105.80, indicating the super hydrophobic nature.

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Graphene oxide clay nanocomposite as an efficient photo-catalyst for degradation of cationic dye

Cited by 28 publications

References 15 publications

Híbridos de grafeno/montmorillonita e óxido de grafeno/montmorillonita como nanomateriais funcionais: uma visão da literatura atual

Híbridos de grafeno/montmorillonita e óxido de grafeno/montmorillonita como nanomateriais funcionais: uma visão da literatura atual

Insight on water remediation application using magnetic nanomaterials and biosorbents

Mechanical Properties and Thermal Conductivity of Epoxy Resin Reinforced with Functionalized Graphene Nanosheets and Woven Glass Fabric

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