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Improving the photocatalytic performance of TiO2 via hybridizing with graphene
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作者 K S Divya Athulya K Madhu +3 位作者 T U Umadevi T Suprabha P.Radhakrishnan Nair Suresh Mathew 《Journal of Semiconductors》 EI CAS CSCD 2017年第6期24-31,共8页
In this paper an improvement in the photocatalytic performance of TiO2 was carried out via hybridizing with graphene.Graphene-TiO2(GR-TiO2/nanocomposites with different weight addition ratios of graphene oxide(GO)h... In this paper an improvement in the photocatalytic performance of TiO2 was carried out via hybridizing with graphene.Graphene-TiO2(GR-TiO2/nanocomposites with different weight addition ratios of graphene oxide(GO)have been prepared via a facile microwave irradiation of GO and tetrabutyl titanate in isopropyl alcohol.Raman spectroscopy(RS),X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),UV–visible spectroscopy(UV–vis),Fourier transform infrared spectra(FTIR),energy dispersive X-ray spectroscopy(EDX)and photoluminescence spectra(PL)are employed to determine the properties of the samples.Microwave irradiation can heat the reactant to a higher temperature in a short time,simultaneously GO is reduced to graphene and TiO2 nanoparticles grown on the surface of GR.GR-TiO2 nanocomposites synthesized via this approach have efficient electron conductivity in GR,resulting in a reduced electron–hole recombination rate.Among the synthesized nanocomposites,GT-8wt% exhibited the best photocatalytic activity toward photocatalytic degradation of MB.Our current work provides a new insight for the fabrication of GR-TiO2 nanocomposites within a short reaction time and also explains the mechanism of photocatalysis employing radical and hole scavengers. 展开更多
关键词 graphene (GR) tetrabutyl titanate (TBT) GR-TiO2 nanocomposites methylene blue PHOTOCATALYSIS
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