Synthesis of flower-like heterostructured β-Bi2O3/Bi2O2CO3 microspheres using Bi2O2CO3 self-sacrifice precursor and its visible-light-induced photocatalytic degradation of o-phenylphenol

Hu, Ruiping; Xiao, Xin; Tu, Shunheng; Zuo, Xiaoxi; Nan, Jun

doi:10.1016/j.apcatb.2014.08.025

Cited by 209 publications

(83 citation statements)

References 60 publications

(63 reference statements)

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“…Among these compounds, Bismuth subcarbonate (Bi 2 O 2 CO 3 ), as a typical member of the Aurivillius-related oxide family, is constructed by (Bi 2 O 2 ) 2+ slabs interleaved by CO 3 2− layers [7]. Very recently, it has been found to exhibit a promising antibacterial performance and a photocatalytic activity capable of degrading pollutants [8,9,10,11,12,13].…”

Section: Introductionmentioning

confidence: 99%

Oil-in-Water Self-Assembled Synthesis of Ag@AgCl Nano-Particles on Flower-like Bi2O2CO3 with Enhanced Visible-Light-Driven Photocatalytic Activity

et al. 2016

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In this work, a series of novel flower-like Ag@AgCl/Bi2O2CO3 were prepared by simple and feasible oil-in-water self-assembly processes. The phase structures of as-prepared samples were examined by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy (DRS), X-ray fluorescence spectrometer (XRF), etc. The characterization results indicated that the presence of Ag@AgCl did not affect the crystal structure, but exerted a great influence on the photocatalytic activity of Bi2O2CO3 and enhanced the absorption band of pure Bi2O2CO3. The photocatalytic activities of the Ag@AgCl/Bi2O2CO3 samples were determined by photocatalytic degradation of methylene blue (MB) under visible light irradiation. The Ag@AgCl (10 wt %)/Bi2O2CO3 composite showed the highest photocatalytic activity, degrading 97.9% MB after irradiation for 20 min, which is over 1.64 and 3.66 times faster than that of pure Ag@AgCl (calculated based on the equivalent Ag@AgCl content in Ag@AgCl (10 wt %)/Bi2O2CO3) and pure Bi2O2CO3, respectively. Bisphenol A (BPA) was also degraded to further prove the degradation ability of Ag@AgCl/Bi2O2CO3. Photocurrent studies indicated that the recombination of photo-generated electron–hole pairs was decreased effectively due to the formation of heterojunctions between flower-like Bi2O2CO3 and Ag@AgCl nanoparticles. Trapping experiments indicated that O2−, h+ and Cl° acted as the main reactive species for MB degradation in the present photocatalytic system. Furthermore, the cycling experiments revealed the good stability of Ag@AgCl/Bi2O2CO3 composites. Based on the above, a photocatalytic mechanism for the degradation of organic compounds over Ag@AgCl/Bi2O2CO3 was proposed.

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Section: Introductionmentioning

confidence: 99%

Oil-in-Water Self-Assembled Synthesis of Ag@AgCl Nano-Particles on Flower-like Bi2O2CO3 with Enhanced Visible-Light-Driven Photocatalytic Activity

et al. 2016

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“…Many Bi 3+ - and Bi 5+ -containing compounds have been found to possess a narrow band gap and exhibit visible light photocatalytic activity because of the hybridized O2p and Bi6s2 valence bands9101112, such as Bi 2 MoO 6 13, BiOI14, Bi 2 WO 6 15, Bi 2 O 2 CO 3 16. However, all these Bi-based photocatalysts don’t show great photocatalytic performance.…”

mentioning

confidence: 99%

Fabrication, Characterization and Response Surface Method (RSM) Optimization for Tetracycline Photodegration by Bi3.84W0.16O6.24- graphene oxide (BWO-GO)

Song

Wang

et al. 2016

Sci Rep

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RSM is a powerful tool for optimizing photocatalytic processes. The BWO-GO photocatalysts have been successfully synthesized via inorganic-salt-assisted hydrothermal method. XRD, TEM, FESEM, HRTEM and STEM are used to characterize BWO-GO heterojunction. UV-vis, PL, ESR and radical scavenger experiments are used to explore the photocatalysis mechanism. The photocatalysts are evaluated by TC photodegradation under visible light irradiation. And the main active species in TC photodegradation is ·O2−. Response surface methodology is used to optimize three key independent operating parameters, namely photocatalyst dosage (X1), percentages of GO (X2) and reaction time (X3), for TC photodegradation. The central composite design (CCD) is used to conduct experiments. The results showed that TC removal is significantly affected by the synergistic effect of linear term of X1 and X3. However, the quadratic terms of X12 and X32 had an antagonistic effect on T removal. The obtained RSM model (R2 = 0.9206) shows a satisfactory correlation between experimental and predicted values of TC removal. The optimized conditions is of 0.3 g photocatalyst dosage, 1.49 wt% GO loaded percentage and 90 min reaction time. Under this condition, theoretical prediction removal is 80.22% and the actual removal is 78.43%.

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“…The k app for the BE20 sample follows a linear relationship to the photocatalyst load up to 0.4 g/L but above this amount, the kinetic rate was abruptly increased. The observed increase might be due to the higher adsorption of the IC dye on the Bi 2 O 3 surface, which caused a reduction in the concentration of the IC dye in solution and as consequence the photodegradation rate seemed to be increased [55,56]. This phenomenon typically masks the real kinetic rate, conducting to wrong interpretations.…”

Section: Adsorption Capacity and Photocatalytic Properties Of Bi 2 Omentioning

confidence: 72%

Photocatalytic activity of enlarged microrods of α-Bi2O3 produced using ethylenediamine-solvent

Hernández-Gordillo

Medina

Bizarro

et al. 2016

Ceramics International

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Synthesis of flower-like heterostructured β-Bi2O3/Bi2O2CO3 microspheres using Bi2O2CO3 self-sacrifice precursor and its visible-light-induced photocatalytic degradation of o-phenylphenol

Cited by 209 publications

References 60 publications

Oil-in-Water Self-Assembled Synthesis of Ag@AgCl Nano-Particles on Flower-like Bi2O2CO3 with Enhanced Visible-Light-Driven Photocatalytic Activity

Oil-in-Water Self-Assembled Synthesis of Ag@AgCl Nano-Particles on Flower-like Bi2O2CO3 with Enhanced Visible-Light-Driven Photocatalytic Activity

Fabrication, Characterization and Response Surface Method (RSM) Optimization for Tetracycline Photodegration by Bi3.84W0.16O6.24- graphene oxide (BWO-GO)

Photocatalytic activity of enlarged microrods of α-Bi2O3 produced using ethylenediamine-solvent

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