Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

Khan, Mujeeb; Tahir, Muhammad Nawaz; Adil, Syed Farooq; Khan, Hadayat Ullah; Al–Warthan, Abdulrahman; Tremel, Wolfgang

doi:10.1039/c5ta02240a

Cited by 576 publications

(270 citation statements)

References 628 publications

(694 reference statements)

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“…GTiO 2 Ns can be generally categorized into three kinds: TiO 2 -mounted activated graphene [92], graphene-doped TiO 2 , and graphene-coated TiO 2 [158]. Each of these types exhibits good photocatalytic activity.…”

Section: Preparation Methods Of Gtio 2 Nsmentioning

confidence: 99%

“…The top-down approach (Table 2) offers considerable economic advantages over bottom-up methods [92,93], producing high quality graphene. In this case, the graphene is derived from the exfoliation of graphite, from mechanical [42,[94][95][96][97], electrochemical expansion [98][99][100], thermal [101], electrostatic deposition [102], and chemical synthesis [103][104][105].…”

Section: Introductionmentioning

confidence: 99%

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Recent Advances in Graphene Based TiO2 Nanocomposites (GTiO2Ns) for Photocatalytic Degradation of Synthetic Dyes

et al. 2017

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Synthetic dyes are widely used in textile, paper, food, cosmetic, and pharmaceutical industries. During industrial processes, some of these dyes are released into the wastewater and their successive release into rivers and lakes produces serious environmental problems. TiO 2 is one of the most widely studied and used photocatalysts for environmental remediation. However, it is mainly active under UV-light irradiation due to its band gap of 3.2 eV, while it shows low efficiency under the visible light spectrum. Regarding the exploration of TiO 2 activation in the visible light region of the total solar spectrum, the incorporation of carbon nanomaterials, such as graphene, in order to form carbon-TiO 2 composites is a promising area. Graphene, in fact, has a large surface area which makes it a good adsorbent for organic pollutants removal through the combination of electrostatic attraction and π-π interaction. Furthermore, it has a high electron mobility and therefore it reduces the electron-hole pair recombination, improving the photocatalytic activity of the semiconductor. In recent years, there was an increasing interest in the preparation of graphene-based TiO 2 photocatalysts. The present short review describes the recent advances in TiO 2 photocatalyst coupling with graphene materials with the aim of extending the light absorption of TiO 2 from UV wavelengths into the visible region, focusing on recent progress in the design and applications in the photocatalytic degradation of synthetic dyes.

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Section: Preparation Methods Of Gtio 2 Nsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recent Advances in Graphene Based TiO2 Nanocomposites (GTiO2Ns) for Photocatalytic Degradation of Synthetic Dyes

et al. 2017

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“…At present, a number of nanocomposites have been prepared by diverse methods and with specific physicochemical properties for biomedical [73], energy conversion, environmental and electrochemical storage [12], and miscellaneous [9] applications, as reported in recent review articles.…”

Section: Broad Classification Of Nanocompositesmentioning

confidence: 99%

Green Routes for Graphene Oxide Reduction and Self- Assembled Graphene Oxide Micro- and Nanostructures Production

Ortega-Amaya¹,

Matsumoto²,

Díaz-Torres³

et al. 2017

Graphene Materials - Structure, Properties and Modifications

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Graphene-derived materials are currently studied because of their actual and projected applications. Among them, graphene oxide (GO) promises for outstanding applications as it can be prepared at large scale by simple, scalable, and low-cost techniques. The existent chemical methods based on the graphite exfoliation (phase solution and Hummers based) produce highly functionalized graphene, i.e., GO-like materials that converts into reduced GO (rGO) after a reduction treatment. The present work presents the current scenario on the GO green reduction methods, on the development of hierarchical carbon-based structures by the self-assembly of GO sheets at interfaces, and on rGObased hybrid nanocomposites. It is worth noting that, to date, the production and application of graphene-related materials are the fastest-growing research areas.

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“…15,16 Apart from this, several other studies have also been published regarding the applications of graphene and graphene-based materials for various biological purposes due to their extraordinary physicochemical properties, such as mechanical properties, electrical properties, electrochemical properties, and thermal conductivity. 14,[17][18][19][20][21][22][23][24] However, despite the recent surge in such studies, a lot more needs to be done in order to fully exploit the potential of graphene-based materials in biological applications. [25][26][27] Among the various challenges, the biocompatibility and toxicity of graphenebased materials both at in vitro and in vivo levels is one of the major challenges.…”

Section: Introductionmentioning

confidence: 99%

Apoptosis inducing ability of silver decorated highly reduced graphene oxide nanocomposites in A549 lung cancer

Khan

Al-Marri

et al. 2016

IJN

Self Cite

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Recently, graphene and graphene-based materials have been increasingly used for various biological applications due to their extraordinary physicochemical properties. Here, we demonstrate the anticancer properties and apoptosis-inducing ability of silver doped highly reduced graphene oxide nanocomposites synthesized by employing green approach. These nano composites (PGE-HRG-Ag) were synthesized by using Pulicaria glutinosa extract (PGE) as a reducing agent and were evaluated for their anticancer properties against various human cancer cell lines with tamoxifen as the reference drug. A correlation between the amount of Ag nanoparticles on the surface of highly reduced graphene oxide (HRG) and the anticancer activity of nanocomposite was observed, wherein an increase in the concentration of Ag nanoparticles on the surface of HRG led to the enhanced anticancer activity of the nanocomposite. The nanocomposite PGE-HRG-Ag-2 exhibited more potent cytotoxicity than standard drug in A549 cells, a human lung cancer cell line. A detailed investigation was undertaken and Fluorescence activated cell sorting (FACS) analysis demonstrated that the nanocomposite PGE-HRG-Ag-2 showed G0/G1 phase cell cycle arrest and induced apoptosis in A549 cells. Studies such as, measurement of mitochondrial membrane potential, generation of reactive oxygen species (ROS) and Annexin V-FITC staining assay suggested that this compound induced apoptosis in human lung cancer cells.

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Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

Abstract: The development of graphene based metal and metal oxide nano composites is reviewed with special focus on their synthesis and their applications in electronics, batteries, solar cells and analytics.

Cited by 576 publications

References 628 publications

Recent Advances in Graphene Based TiO2 Nanocomposites (GTiO2Ns) for Photocatalytic Degradation of Synthetic Dyes

Recent Advances in Graphene Based TiO2 Nanocomposites (GTiO2Ns) for Photocatalytic Degradation of Synthetic Dyes

Green Routes for Graphene Oxide Reduction and Self- Assembled Graphene Oxide Micro- and Nanostructures Production

Apoptosis inducing ability of silver decorated highly reduced graphene oxide nanocomposites in A549 lung cancer

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