Microwave-assisted synthesis of TiO 2-reduced graphene oxide composites for the photocatalytic reduction of Cr(vi)

Xinjuan Liu; Likun Pan; Tian Lv; Guang Zhu; Ting Lu; Zhuo Sun; Changqing Sun

doi:10.1039/c1ra00298h

Microwave-assisted synthesis of TiO ₂-reduced graphene oxide composites for the photocatalytic reduction of Cr(vi)

Xinjuan Liu
, Likun Pan^*
, Tian Lv
, Guang Zhu
, Ting Lu
, Zhuo Sun
, Changqing Sun

^*Corresponding author for this work

East China Normal University
Nanyang Technological University

Research output: Contribution to journal › Article › peer-review

175 Scopus citations

Abstract

TiO ₂-reduced graphene oxide (RGO) composites are successfully synthesized via the microwave-assisted reduction of graphite oxide in a TiO ₂ suspension using a microwave synthesis system. Their morphology, structure and photocatalytic performance in the reduction of Cr(vi) are characterized by scanning electron microscopy, transmission electron microscopy, atomic force microscopy, X-ray diffraction spectroscopy and UV-vis absorption spectrophotometer. The results show that in the composite the RGO nanosheets are densely decorated by TiO ₂ nanoparticles, which displays a good combination between RGO and TiO ₂. TiO ₂-RGO composites exhibit 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 TiO ₂ P25 (70%) due to the increased light absorption intensity and range as well as the reduction of electron-hole pair recombination in TiO ₂ with the introduction of RGO.

Original language	English
Pages (from-to)	1245-1249
Number of pages	5
Journal	RSC Advances
Volume	1
Issue number	7
DOIs	https://doi.org/10.1039/c1ra00298h
State	Published - 7 Nov 2011
Externally published	Yes

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title = "Microwave-assisted synthesis of TiO 2-reduced graphene oxide composites for the photocatalytic reduction of Cr(vi)",

abstract = "TiO 2-reduced graphene oxide (RGO) composites are successfully synthesized via the microwave-assisted reduction of graphite oxide in a TiO 2 suspension using a microwave synthesis system. Their morphology, structure and photocatalytic performance in the reduction of Cr(vi) are characterized by scanning electron microscopy, transmission electron microscopy, atomic force microscopy, X-ray diffraction spectroscopy and UV-vis absorption spectrophotometer. The results show that in the composite the RGO nanosheets are densely decorated by TiO 2 nanoparticles, which displays a good combination between RGO and TiO 2. TiO 2-RGO composites exhibit 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 TiO 2 P25 (70\%) due to the increased light absorption intensity and range as well as the reduction of electron-hole pair recombination in TiO 2 with the introduction of RGO.",

author = "Xinjuan Liu and Likun Pan and Tian Lv and Guang Zhu and Ting Lu and Zhuo Sun and Changqing Sun",

year = "2011",

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doi = "10.1039/c1ra00298h",

language = "英语",

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pages = "1245--1249",

journal = "RSC Advances",

issn = "2046-2069",

publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Microwave-assisted synthesis of TiO 2-reduced graphene oxide composites for the photocatalytic reduction of Cr(vi)

AU - Liu, Xinjuan

AU - Pan, Likun

AU - Lv, Tian

AU - Zhu, Guang

AU - Lu, Ting

AU - Sun, Zhuo

AU - Sun, Changqing

PY - 2011/11/7

Y1 - 2011/11/7

N2 - TiO 2-reduced graphene oxide (RGO) composites are successfully synthesized via the microwave-assisted reduction of graphite oxide in a TiO 2 suspension using a microwave synthesis system. Their morphology, structure and photocatalytic performance in the reduction of Cr(vi) are characterized by scanning electron microscopy, transmission electron microscopy, atomic force microscopy, X-ray diffraction spectroscopy and UV-vis absorption spectrophotometer. The results show that in the composite the RGO nanosheets are densely decorated by TiO 2 nanoparticles, which displays a good combination between RGO and TiO 2. TiO 2-RGO composites exhibit 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 TiO 2 P25 (70%) due to the increased light absorption intensity and range as well as the reduction of electron-hole pair recombination in TiO 2 with the introduction of RGO.

AB - TiO 2-reduced graphene oxide (RGO) composites are successfully synthesized via the microwave-assisted reduction of graphite oxide in a TiO 2 suspension using a microwave synthesis system. Their morphology, structure and photocatalytic performance in the reduction of Cr(vi) are characterized by scanning electron microscopy, transmission electron microscopy, atomic force microscopy, X-ray diffraction spectroscopy and UV-vis absorption spectrophotometer. The results show that in the composite the RGO nanosheets are densely decorated by TiO 2 nanoparticles, which displays a good combination between RGO and TiO 2. TiO 2-RGO composites exhibit 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 TiO 2 P25 (70%) due to the increased light absorption intensity and range as well as the reduction of electron-hole pair recombination in TiO 2 with the introduction of RGO.

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U2 - 10.1039/c1ra00298h

DO - 10.1039/c1ra00298h

M3 - 文章

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EP - 1249

JO - RSC Advances

JF - RSC Advances

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ER -

Microwave-assisted synthesis of TiO ₂-reduced graphene oxide composites for the photocatalytic reduction of Cr(vi)

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