Structure and photocatalytic properties of TiO2-Graphene Oxide intercalated composite

Abstract

TiO 2 -Graphene Oxide intercalated composite (TiO 2 -Graphene Oxide) has been successfully prepared at low temperature (80°C) with graphite oxide (GO) and titanium sulfate (Ti(SO 4 ) 2 ) as initial reactants. GO was firstly exfoliated by NaOH and formed single and multi-layered graphite oxide mixture which can be defined as graphene oxide, [TiO] 2+ induced by the hydrolysis of Ti(SO 4 ) 2 diffused into graphene oxide interlayer by electrostatic attraction. The nucleation and growth of TiO 2 crystallites took place at low temperature and TiO 2 -Graphene Oxide composite was successfully synthesized. Furthermore, the photocatalytic properties of TiO 2 -Graphene Oxide under the irradiation of UV light were also studied. The results show that the degradation rate of methyl orange is 1.16 mg min −1 g −1 (refer to the efficiency of the initial 15 min). Compared with P25 powder, this kind of intercalation composite owns much better efficiency. On the other hand, the reusable properties and stable properties of TiO 2 -Graphene Oxide intercalated composite are also discussed in this paper. At last, crystalline structure, interface status, thermal properties and microscopic structure of TiO 2 -Graphene Oxide were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), field emission scanning electron microscopy (FESEM) and high-resolution Transmission Electron Microscopy (HRTEM). Also, we have analyzed major influencing factors and mechanism of the composite structures which evidently improve the photocatalytic properties. Titania, Graphene Oxide, intercalated composite, photocatalytic properties Citation:Zhang Q, He Y Q, Chen X G, et al. Structure and photocatalytic properties of TiO 2 -Graphene Oxide intercalated composite.

Electrodeposition of Ni–GNS–TiO2 nanocomposite coatings as anticorrosion film for mild steel in neutral environment

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Comparative studies on Ag3PO4/BiPO4–metal-organic framework–graphene-based nanocomposites for photocatalysis application

“…5a, no diffraction peaks are seen in the XRD patterns of both nanocomposites due to the GR. The characteristic peak of GR at 24.5 • might be shielded by the main peak of AB at 25 • [30]. The rest of the peaks which are assigned to the AB sample were well crystallized, in which the diffraction peaks could be readily indexed to the known hexagonal BiPO 4 (PDF File No.…”

A brief review of graphene-based material synthesis and its application in environmental pollution management

“…Graphene is a two-dimensional nanomaterial that has between one and ten layers of sp 2 -hybridized carbon atoms arranged in six-membered rings. It has many unique properties, including interesting transport phenomena, and high Young's modulus (approximately 1100 GPa) [ Importantly, it could be used in pollutant removal in environmental remediation, which has attracted increasing research in recent few years [5][6][7][8][9][10] and is the focus of this review. Aggregation of graphene layers determines the practical specific surface area, and modification of pristine graphene with other compounds will decrease the aggregation and increase the effective surface area.…”