Effects of carbon content on the photocatalytic activity of C/BiVO4 composites under visible light irradiation

Lee, Duk Kyu; Cho, In Sun; Lee, Sangwook; Bae, Shin Tae; Noh, Jun Hong; Kim, Dong Wan; Hong, Kug Sun

doi:10.1016/j.matchemphys.2009.08.028

Cited by 53 publications

(11 citation statements)

References 24 publications

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“…Metal vanadate materials (MVO 4 where M = Bi, In, Fe, Ca, Sm, etc.) have been widely investigated as possible active materials for visible light-driven photocatalysts [7][8][9][10]. In recent years, bismuth vanadate (BiVO 4 ) has been widely studied as a prospective material because it exhibits visible light-driven photocatalytic activity for organic compounds degradation.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient visible light-induced photocatalytic degradation of methylene blue over InVO4/BiVO4 composite photocatalyst

Lamdab

Wetchakun²,

Phanichphant³

et al. 2015

J Mater Sci

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A highly efficient and visible light responsive photocatalyst was developed by indium vanadate (InVO 4 )/ bismuth vanadate (BiVO 4 ) composite photocatalyst. The samples were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller, scanning electron microscopy, transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectra, XPS, zeta potential, and photoluminescence techniques. The XRD, TEM, and XPS results indicated the prepared sample was actually a two-phase composite: InVO 4 and BiVO 4 . Photocatalytic activities of all catalysts were evaluated for the degradation of methylene blue in aqueous solution under visible light irradiation. The highest activity was obtained in the InVO 4 /BiVO 4 composite using 0.8:0.2 mol ratio of InVO 4 :BiVO 4 . On the basis of the calculated energy band positions, the mechanism of enhanced photocatalytic activity was discussed.

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Section: Introductionmentioning

confidence: 99%

Highly efficient visible light-induced photocatalytic degradation of methylene blue over InVO4/BiVO4 composite photocatalyst

Lamdab

Wetchakun²,

Phanichphant³

et al. 2015

J Mater Sci

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“…[25][26][27] To improvet he optical absorption properties and charge separation efficiency,C -doped BiVO 4 and C/BiVO 4 composites with carbon adsorbed at the surface of the metal oxide were introduced. [28,29] Here we report anew synthetic method for BiVO 4 using amicrowave-assisted approach based on the concept of in situ twin polymerization. If we start from metal alkoxides, twin polymerization gives access to organic-inorganic hybrid materials composed of bi-continuous networks.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast, the UV/Vis spectra of carbon-doped and carbon-loaded BiVO 4 show additional background absorption above l = 520 nm. [28,29] The band gaps determined based on Tauc plots using (ahv) 2/n (n = 1) versus hn (Figure 5b)a re (2.54 AE 0.01) eV for BiVO 4 -1,( 2.58 AE 0.04) eV for BiVO 4 -2,( 2.55 AE 0.03) eV for BiVO 4 -3,a nd (2.49 AE 0.05) eV for BiVO 4 -4 (Table1). The values are slightly higher than those reported by Kudo et al for the band gap of m-BiVO 4 (2.4 eV).…”

mentioning

confidence: 99%

Nonaqueous Synthesis of a Bismuth Vanadate Photocatalyst By Using Microwave Heating: Photooxidation versus Photosensitized Decomposition in Visible‐Light‐Driven Photocatalysis

et al. 2015

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A new synthetic route to monoclinic bismuth vanadate using a concept adapted from a nonaqueous synthesis strategy for nanostructured organic–inorganic hybrid materials and metal oxides, introduced recently as twin polymerization, is reported. Microwave‐assisted synthesis starting from bismuth(III) tert‐butoxide and vanadium(V) oxytri(tert‐butoxide) in the presence of 2‐methoxybenzyl alcohol, 2,4‐dimethoxybenzyl alcohol, and 2‐(2‐thienyl)iso‐propyl alcohol gave hybrid materials, which were characterized by solid‐state 13C NMR spectroscopy, CH analysis, atomic absorption spectroscopy, and energy dispersive X‐ray spectroscopy. Subsequent pyrolysis resulted in nanoscale monoclinic bismuth vanadate that showed a high photocatalytic activity. The photocatalytic decomposition of model pollutants such as rhodamine B (RhB), methyl orange, methylene blue, and orange G under visible‐light irradiation using the as‐prepared bismuth vanadate samples was studied with a focus on the influence of the agglomeration behavior. The interplay between the photooxidation of RhB, induced by the excitation of the catalyst using visible light, and the photosensitized decomposition pathway is demonstrated by degradation experiments in solution and the solid state.

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“…Over the past decades, the development of new visible-light photoactive materials has been pursued to improve the practical capacity of semiconductors under natural solar energy. To achieve this purpose, variant strategies such as doping the elemental impurities, coupling different semiconductors, and the synthesis of new visiblelight photoactive catalysts have been served (Zhang et al 2010; Lee et al 2010;Yin et al 2010;Kudo et al 1998;Wang et al 2008Wang et al , 2010aAn et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Visible-light photoactive Ag–AgBr/α-Ag3VO4 nanostructures prepared in a water-soluble ionic liquid for degradation of wastewater

Padervand

2016

Appl Nanosci

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Ag-AgBr/a-Ag 3 VO 4 photocatalysts, prepared by an ionic liquid-assisted precipitation method, were used as an efficient visible light-driven photocatalytic system for removal of wastewater and pathogenic bacteria from the aqueous medium. X-ray diffraction powder, diffuse reflectance spectroscopy, Fourier transform infrared, scanning electron microscopy, and nitrogen adsorptiondesorption isotherm (BET) analysis methods were used to characterize the nanostructures. Photodegradation mechanism was investigated and the results showed that the prepared samples were too efficient for the degradation of Acid Blue 92 (AB92) azo dye, and E. coli cells under visible light. The photogenerated electron-hole pairs reacted with the species in the solution and produced super active radicals such as OH Á , HO Á 2 , and O ÁÀ 2 which are responsible for the degradation of the environmental pollutions. TEM images were used to clarify the antibacterial activity of the products. Finally, as a practical application of the prepared photocatalysts, their ability evaluated for degradation of a real wastewater sample which was provided from the textile industries.

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Effects of carbon content on the photocatalytic activity of C/BiVO4 composites under visible light irradiation

Cited by 53 publications

References 24 publications

Highly efficient visible light-induced photocatalytic degradation of methylene blue over InVO4/BiVO4 composite photocatalyst

Highly efficient visible light-induced photocatalytic degradation of methylene blue over InVO4/BiVO4 composite photocatalyst

Nonaqueous Synthesis of a Bismuth Vanadate Photocatalyst By Using Microwave Heating: Photooxidation versus Photosensitized Decomposition in Visible‐Light‐Driven Photocatalysis

Visible-light photoactive Ag–AgBr/α-Ag3VO4 nanostructures prepared in a water-soluble ionic liquid for degradation of wastewater

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