TiO2/graphene composite from thermal reaction of graphene oxide and its photocatalytic activity in visible light

Zhang, Yupeng; Pan, Chunxu

doi:10.1007/s10853-010-5116-x

Cited by 348 publications

(199 citation statements)

References 23 publications

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“…In the mixing method (M), GO and semiconductors are mixed with stirring and ultrasonication in order to obtain the exfoliation of GO and, successively, GO/TiO 2 product with uniform distribution; in a second step the reduction of GO is performed [51,[172][173][174][175].…”

Section: Preparation Methods Of Gtio 2 Nsmentioning

confidence: 99%

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%

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

et al. 2017

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“…80 Liu et al synthesized TiO 2 -rGO composites via the microwave-assisted reduction of GO in a TiO 2 suspension. 81 The TiO 2 -rGO composites exhibited enhanced photocatalytic performance for the reduction of Cr(VI) with a maximum removal rate of 91% under UV light irradiation as compared with pure TiO 2 (83%) and commercial P25 (70%) due to the increased light absorption intensity and range.…”

Section: Water Remediation By Photocatalystsmentioning

confidence: 99%

Environmental applications using graphene composites: water remediation and gas adsorption

et al. 2013

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This review deals with wide-ranging environmental studies of graphene-based materials on the adsorption of hazardous materials and photocatalytic degradation of pollutants for water remediation and the physisorption, chemisorption, reactive adsorption, and separation for gas storage. The environmental and biological toxicity of graphene, which is an important issue if graphene composites are to be applied in environmental remediation, is also addressed.

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“…The photocatalytic effi ciency of ZnO-TiO 2 composite system is highly related to their light absorption including amount, wavelength range, and absorption peak absorption. To characterize the absorption properties of modifi ed photocatalyst, diffuse refl ectance (DR) measurement was carried out and then data were converted into the equivalent absorption coeffi cient using the Kubelka-Munk method [63]. As is shown in Fig.…”

Section: [ ( )/ ( )]mentioning

confidence: 99%

Effectiveness of photodecomposition of rhodamine B and malachite green upon coupled tricomponent TiO2(Anatase-Rutile)/ZnO nanocomposite

Zhang¹

2013

Acta Chimica Slovaca

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In this study, mixed phase ZnO-TiO 2 nanocomposite consisting of hexagonal ZnO and anatase/rutile TiO 2 has been synthesized via sol-gel process.The physical and photochemical properties of samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-vis diffuse refl ectance spectroscopy (UV-vis DRS), photoluminscience spectra (PL) and and photocurrent action spectra techniques. In the case of minerlization of rhodamine B (RhB) and malachite green (MG) dyes, the coupled ZnO-TiO 2 nanocomposite with the suitable band structure and the lowest photoluminescence intensity showed the best photodecolorization activity. Synergistic effects between the two oxides for photocatalytic decomposition of RhB and MG are proposed to elucidate the decolorization mechanism. The lifetime of electrons and holes was prolonged in the ZnO-anatase/rutile multiple-component system, which can enhance the light harvest and the ability of generating photo-induced electron-hole pairs of active sites, and the favorable electron-transfer properties in the coupled ZnO-TiO 2 nanocomposite. Therefore, the as-prepared ZnO-TiO 2 nanocomposite showed an excellent effi ciency towards the removal of aqueous organic dyes and it is of certain signifi cance for environmental photocatalysis.

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TiO2/graphene composite from thermal reaction of graphene oxide and its photocatalytic activity in visible light

Cited by 348 publications

References 23 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

Environmental applications using graphene composites: water remediation and gas adsorption

Effectiveness of photodecomposition of rhodamine B and malachite green upon coupled tricomponent TiO2(Anatase-Rutile)/ZnO nanocomposite

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