Preparation and photocatalytic properties TiO<sub>2</sub>/graphene nanocomposites with sandwich structure

ZENG Xiongfeng; WANG Menghuan; WANG Jiansheng; ZHAO Yingna; ZHANG Wenli

doi:10.13801/j.cnki.fhclxb.20210518.009

Volume 39 Issue 2

Feb. 2022

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ZENG Xiongfeng, WANG Menghuan, WANG Jiansheng, et al. Preparation and photocatalytic properties TiO2/graphene nanocomposites with sandwich structure[J]. Acta Materiae Compositae Sinica, 2022, 39(2): 656-663. doi: 10.13801/j.cnki.fhclxb.20210518.009

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ZENG Xiongfeng, WANG Menghuan, WANG Jiansheng, et al. Preparation and photocatalytic properties TiO₂/graphene nanocomposites with sandwich structure[J]. Acta Materiae Compositae Sinica, 2022, 39(2): 656-663. doi: 10.13801/j.cnki.fhclxb.20210518.009

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Preparation and photocatalytic properties TiO₂/graphene nanocomposites with sandwich structure

doi: 10.13801/j.cnki.fhclxb.20210518.009

Hebei Provincial Laboratory of Inorganic Nonmetallic Materials, College of Material Science and Engineering, North China University of Science and Technology, Tangshan 063210, China

Received Date: 2021-03-08
Accepted Date: 2021-05-13
Rev Recd Date: 2021-05-12

Available Online: 2021-05-18

Publish Date: 2022-02-01

Abstract

Abstract

TiO₂/graphene nanocomposites were synthesized from graphene oxide (GO), C₁₂H₂₈N₂ and TiO₂ sol by three-step method as follows: Dodecanediamine pre-intercalating, ion exchange, and interlayer in-situ formation of TiO₂ by calcined. The properties and structures of TiO₂/graphene nanocomposites with sandwich structure were characterized by XRD, Raman, FTIR, TEM, TG, UV-Vis and PL. The photocatalytic degradation performance of TiO₂/graphene composites prepared with different amounts of TiO₂ were investigated. The crystallization of TiO₂ and the reduction of GO were significantly increased simultaneously during calcination. According to XRD and FTIR results, TiO₂ nanoparticles have formed in situ between the interlayer of graphene and anchored on graphene with chemically-bonded. Therefore, it can be concluded that the TiO₂/graphene nanocomposites with sandwich structure are prepared successfully. TiO₂/graphene composites show the best photocatalytic degradation of ciprofloxacin (CIP) when the mass fraction of TiO₂ is 65.5wt%, and the degradation rate reaches 90% after 150 min under visible light irradiation, which is higher than pure TiO₂ nanoparticles (28%, 150 min). It can be mainly attributed to the special sandwich structure with enhanced photoinduced electron-hole separation. The photocatalyst stability test shows that TiO₂/graphene nanocomposites possess high photostability and structure stability for potential practical applications in environmental purification.
- TiO₂,
- graphene,
- sandwich structure,
- composites,
- photocatalysis
Long Abstrsct
Innovation Points

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References(24)

References

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