RGO/Bi2O2CO3: One-step Synthesis and Photocatalytic Property

doi:10.15541/jim20170043

Abstract

Abstract:

RGO/Bi₂O₂CO₃ photocatalyst was prepared by one-pot hydrothermal method. The samples were characterized by XRD, N₂ adsorption, XPS, SEM, and TEM. The results indicate that Bi₂O₂CO₃ are effectively composited by the reduced graphene oxide (RGO). The photocatalytic property of RGO/Bi₂O₂CO₃ composite is obviously improved after exclusion of physical adsorption from graphene. Specifically, the sample composited by 6.0wt% RGO shows the best photocatalytic activity with a rate constant as fast as 3.02-folds of Bi₂O₂CO₃ for degradation of RhB. Photoelectrochemical analysis indicate that the introduction of RGO effectively inhibits the recombination of photogenerated e^-/h⁺ pairs and broadens the visible light absorption of Bi₂O₂CO₃. Mechanism exploration shows that more active species O₂^-· is produced due to the multi-site electron capture of O₂ in the composite.

Key words: graphene, Bi₂O₂CO₃, photocatalysis, active species

CLC Number:

TQ174

ZHANG Guo-Ying, SHEN Xing-Qi, YANG Li-Ming, WEI Xue-Min, ZHANG Xin. RGO/Bi₂O₂CO₃: One-step Synthesis and Photocatalytic Property[J]. Journal of Inorganic Materials, 2017, 32(11): 1202-1208.

Figures/Tables 8

Fig. 1 XRD patterns of different samples (a) Graphite and GO; (b) RGO, BG0% and BG6%

Fig. 2 XPS spectra of BG6% composite (a) Survey spectrum; (b) O1s; (c) Bi4f of BG 6% and mixing 6%; (d) C1s of GO, BG6% and mixing RGO-6%

Fig. 3 SEM and TEM images of BG0% (a, b) and BG6% (c-f)

Fig. 4 (a) Nitrogen adsorption-desorption isotherms with corresponding pore-size distribution curves (inset) and (b) UV-Vis DRS of series BG samples

Fig. 5 Photocatalytic activity of BG samples (a), temporal evolution of RhB absorption spectra over BG0%(b) and BG 6% (c) with corresponding dynamic plots (inset), circulation runs of BG6% photocatalyst (d)

Fig. 6 (a) PL spectra and (b) EIS Nyquist curves of pure BOC and BG composites

Fig. 7 Effects of scavengers on the degradation of RhB over BG6% photocatalyst

Fig. 8 Schematic illustration of charge migration on the interface of RGO/BOC

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RGO/Bi₂O₂CO₃: One-step Synthesis and Photocatalytic Property

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