Enhanced photo-degradation of bisphenol a under simulated solar light irradiation by Zn-Ti mixed metal oxides loaded on graphene from aqueous media

Shanshan Yang; Pingxiao Wu; Meiqing Chen; Zhujian Huang; Wen Li; Nengwu Zhu; Yiran Ji

doi:10.1039/c6ra01089j

Enhanced photo-degradation of bisphenol a under simulated solar light irradiation by Zn-Ti mixed metal oxides loaded on graphene from aqueous media

Shanshan Yang, Pingxiao Wu^*, Meiqing Chen, Zhujian Huang, Wen Li, Nengwu Zhu, Yiran Ji

^*Corresponding author for this work

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

In the present study, the mixed metal oxides (rGO-ZnTi-MMO-x, x presents weight percentage of GO) were obtained by thermal treatment of a Zn-Ti layered double hydroxides-graphene oxide (GO-ZnTi-LDHs) composite. rGO-ZnTi-MMOs were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectra techniques. The photocatalytic activity of the obtained photocatalysts showed significantly enhanced activities in the degradation of bisphenol A (BPA). Compared with pristine ZnTi-MMOs, 88.12% of BPA at 10 mg L^-1 was degraded using 0.5 g L^-1 of rGO-ZnTi-MMO-2% as a catalyst under 3 h of simulated solar light irradiation. Photo-generated holes, OH and singlet oxygen radicals were demonstrated to be the predominant active species responsible for the photo-degradation of BPA. UV-vis diffuse reflectance spectra, photoluminescence spectra electrochemical impedance spectroscopy and transient photocurrent response of the photocatalyst confirmed that the enhanced photocatalytic activity of rGO-ZnTi-MMOs composites was attributed to the extended visible light absorption region and efficient transportation and separation of photo-induced electron-hole pairs of rGO-ZnTi-MMOs with unique hetero-nanostructure. Therefore, this work presents a facile method for the fabrication of a kind of graphene-based photocatalyst for water treatment.

Original language	English
Pages (from-to)	26495-26504
Number of pages	10
Journal	RSC Advances
Volume	6
Issue number	32
DOIs	https://doi.org/10.1039/c6ra01089j
Publication status	Published - 2016
Externally published	Yes

Bibliographical note

Funding Information:
The authors are grateful for financial support from the National Natural Science Foundation of China (Grant No. 41472038, 51509093, 41273122), the Science and Technology Plan of Guangdong Province, China (No. 2014A020216002) and the Fundamental Research Funds for the Central Universities, SCUT (No. 2015ZP007). The authors thank the Analytical and Testing Center, South China University of Technology.

Publisher Copyright:
© The Royal Society of Chemistry 2016.

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10.1039/c6ra01089j

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@article{c34ded4e837148669a4deccb156925b1,

title = "Enhanced photo-degradation of bisphenol a under simulated solar light irradiation by Zn-Ti mixed metal oxides loaded on graphene from aqueous media",

abstract = "In the present study, the mixed metal oxides (rGO-ZnTi-MMO-x, x presents weight percentage of GO) were obtained by thermal treatment of a Zn-Ti layered double hydroxides-graphene oxide (GO-ZnTi-LDHs) composite. rGO-ZnTi-MMOs were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectra techniques. The photocatalytic activity of the obtained photocatalysts showed significantly enhanced activities in the degradation of bisphenol A (BPA). Compared with pristine ZnTi-MMOs, 88.12% of BPA at 10 mg L-1 was degraded using 0.5 g L-1 of rGO-ZnTi-MMO-2% as a catalyst under 3 h of simulated solar light irradiation. Photo-generated holes, OH and singlet oxygen radicals were demonstrated to be the predominant active species responsible for the photo-degradation of BPA. UV-vis diffuse reflectance spectra, photoluminescence spectra electrochemical impedance spectroscopy and transient photocurrent response of the photocatalyst confirmed that the enhanced photocatalytic activity of rGO-ZnTi-MMOs composites was attributed to the extended visible light absorption region and efficient transportation and separation of photo-induced electron-hole pairs of rGO-ZnTi-MMOs with unique hetero-nanostructure. Therefore, this work presents a facile method for the fabrication of a kind of graphene-based photocatalyst for water treatment.",

author = "Shanshan Yang and Pingxiao Wu and Meiqing Chen and Zhujian Huang and Wen Li and Nengwu Zhu and Yiran Ji",

note = "Funding Information: The authors are grateful for financial support from the National Natural Science Foundation of China (Grant No. 41472038, 51509093, 41273122), the Science and Technology Plan of Guangdong Province, China (No. 2014A020216002) and the Fundamental Research Funds for the Central Universities, SCUT (No. 2015ZP007). The authors thank the Analytical and Testing Center, South China University of Technology. Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2016.",

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doi = "10.1039/c6ra01089j",

language = "English",

volume = "6",

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AU - Yang, Shanshan

AU - Wu, Pingxiao

AU - Chen, Meiqing

AU - Huang, Zhujian

AU - Li, Wen

AU - Zhu, Nengwu

AU - Ji, Yiran

N1 - Funding Information: The authors are grateful for financial support from the National Natural Science Foundation of China (Grant No. 41472038, 51509093, 41273122), the Science and Technology Plan of Guangdong Province, China (No. 2014A020216002) and the Fundamental Research Funds for the Central Universities, SCUT (No. 2015ZP007). The authors thank the Analytical and Testing Center, South China University of Technology. Publisher Copyright: © The Royal Society of Chemistry 2016.

PY - 2016

Y1 - 2016

N2 - In the present study, the mixed metal oxides (rGO-ZnTi-MMO-x, x presents weight percentage of GO) were obtained by thermal treatment of a Zn-Ti layered double hydroxides-graphene oxide (GO-ZnTi-LDHs) composite. rGO-ZnTi-MMOs were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectra techniques. The photocatalytic activity of the obtained photocatalysts showed significantly enhanced activities in the degradation of bisphenol A (BPA). Compared with pristine ZnTi-MMOs, 88.12% of BPA at 10 mg L-1 was degraded using 0.5 g L-1 of rGO-ZnTi-MMO-2% as a catalyst under 3 h of simulated solar light irradiation. Photo-generated holes, OH and singlet oxygen radicals were demonstrated to be the predominant active species responsible for the photo-degradation of BPA. UV-vis diffuse reflectance spectra, photoluminescence spectra electrochemical impedance spectroscopy and transient photocurrent response of the photocatalyst confirmed that the enhanced photocatalytic activity of rGO-ZnTi-MMOs composites was attributed to the extended visible light absorption region and efficient transportation and separation of photo-induced electron-hole pairs of rGO-ZnTi-MMOs with unique hetero-nanostructure. Therefore, this work presents a facile method for the fabrication of a kind of graphene-based photocatalyst for water treatment.

AB - In the present study, the mixed metal oxides (rGO-ZnTi-MMO-x, x presents weight percentage of GO) were obtained by thermal treatment of a Zn-Ti layered double hydroxides-graphene oxide (GO-ZnTi-LDHs) composite. rGO-ZnTi-MMOs were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectra techniques. The photocatalytic activity of the obtained photocatalysts showed significantly enhanced activities in the degradation of bisphenol A (BPA). Compared with pristine ZnTi-MMOs, 88.12% of BPA at 10 mg L-1 was degraded using 0.5 g L-1 of rGO-ZnTi-MMO-2% as a catalyst under 3 h of simulated solar light irradiation. Photo-generated holes, OH and singlet oxygen radicals were demonstrated to be the predominant active species responsible for the photo-degradation of BPA. UV-vis diffuse reflectance spectra, photoluminescence spectra electrochemical impedance spectroscopy and transient photocurrent response of the photocatalyst confirmed that the enhanced photocatalytic activity of rGO-ZnTi-MMOs composites was attributed to the extended visible light absorption region and efficient transportation and separation of photo-induced electron-hole pairs of rGO-ZnTi-MMOs with unique hetero-nanostructure. Therefore, this work presents a facile method for the fabrication of a kind of graphene-based photocatalyst for water treatment.

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JO - RSC Advances

JF - RSC Advances

IS - 32

ER -

Enhanced photo-degradation of bisphenol a under simulated solar light irradiation by Zn-Ti mixed metal oxides loaded on graphene from aqueous media

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