Preparation of a visible light-driven Bi2O3–TiO2 composite photocatalyst by an ethylene glycol-assisted sol–gel method, and its photocatalytic properties

Chen, Jingshuai; Qin, Shiyue; Liu, Yuande; Feng, Xinliang; Yin, Xiaohong

doi:10.1007/s11164-012-0989-8

Cited by 18 publications

(6 citation statements)

References 25 publications

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“…The improved photodegradation could be explained by formation of a unique heterojunction-like interfacial structure between BiOX (X = Cl, Br) and g-C 3 N 4 semiconductors because of the matched band edge potentials between g-C 3 N 4 and BiOX (X = Cl, Br) [26][27][28]. As illustrated in Fig.…”

Section: Resultsmentioning

confidence: 96%

Preparation of g-C3N4/BiOX (X = Cl, Br, I) composites, and their photocatalytic activity under visible light irradiation

et al. 2014

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g-C 3 N 4 /BiOX (X = Cl, Br, I) composite photocatalysts have been prepared by means of a facile immersion-hydrolysis method. The microstructural and morphological characteristics of the as-prepared composite photocatalysts were investigated by means of X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, and Fourier-transform infrared spectroscopy. The photodegradation performance of both g-C 3 N 4 /BiOCl and g-C 3 N 4 /BiOBr composites was superior to that of pure g-C 3 N 4 or the corresponding bismuth oxyhalides, possibly because of efficient separation of photogenerated carriers at the interface between g-C 3 N 4 and BiOX (X = Cl, Br). The photostability of as-prepared g-C 3 N 4 /BiOX (X = Cl, Br) composites was also investigated.

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Section: Resultsmentioning

confidence: 96%

Preparation of g-C3N4/BiOX (X = Cl, Br, I) composites, and their photocatalytic activity under visible light irradiation

et al. 2014

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“…For TiO 2 sample, its diffraction peaks are in good agreement with the anatase phase of TiO 2 (JCPDS no. 21-1272, space group: I4 1 /amd (141)) [30][31][32]. The TiO 2 /g-C 3 N 4 composite presents a two-phase composition: g-C 3 N 4 and TiO 2 , indicating that the hybridization of TiO 2 with g-C 3 N 4 did not change its structure.…”

Section: Resultsmentioning

confidence: 99%

TiO2/g-C3N4 nanosheets hybrid photocatalyst with enhanced photocatalytic activity under visible light irradiation

Li²,

Zhao

et al. 2015

Res Chem Intermed

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The nanosheets TiO 2 /g-C 3 N 4 hybrid material with efficient visible-light photocatalytic activity was prepared by a facile solvothermal method. The as-prepared TiO 2 /g-C 3 N 4 nanosheets composite was thoroughly characterized by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, N 2 adsorption-desorption analysis, UV-Vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. As evaluated by the degradation of methylene blue under visible light irradiation, TiO 2 /g-C 3 N 4 hybrid composites exhibit much higher photocatalytic activity than pristine g-C 3 N 4 and TiO 2 , respectively. The significant enhancement in photodegradation activity over the TiO 2 /g-C 3 N 4 photocatalyst can be ascribed to the combined effects of the nanosheet structure and subsequent efficient separation of photogenerated charge carriers. A tentative mechanism for the photodegradation process was proposed.

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“…Composite materials of bismuth oxide and titania have been demonstrated to date as being able to degrade various model pollutants, including dyes [15][16][17][18][19], phenol [20,21], toluene [22], various pharmaceuticals [23,24] and pesticides [25] under visible and solar irradiation. These materials may be used in powdered form [17,18,24,26], as well as in the form of solid coatings [21,27,28]. Of the preparation methods, these materials are the most frequently synthesized using the sol-gel method [16,17,19,28], hydrothermal synthesis [18,27,29,30], or a combination of both [20].…”

Section: Introductionmentioning

confidence: 99%

Characterisation and properties of visible light-active bismuth oxide-titania composite photocatalysts

Ratova

Tosheva

Kelly

et al. 2019

Sustainable Materials and Technologies

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Bismuth oxide -titanium dioxide composite materials were produced by pulsed DC reactive magnetron sputtering onto two types of commercially available titanium dioxide nanoparticles. The use of an oscillating bowl enabled deposition of bismuth oxide uniformly onto loose powders, in contrast to solid substrates typically used for the conventional magnetron sputtering processes.Variation of the deposition time allowed the production of composite materials with different amounts of bismuth oxide. The composite materials, as well as uncoated titania powders, were extensively analysed by a range of analytical techniques, including SEM/EDX, XRD, BET, XPS, TEM and UV-visible diffuse reflectance spectroscopy. Photocatalytic properties of the materials were assessed under simulated visible light irradiation via degradation of acetone and methanol through measurements of carbon dioxide evolution. Additionally, the composite materials were characterised with a newly developed technique of reversed double-beam photoacoustic spectroscopy in order to obtain information on the distribution of electron traps. Bismuth oxide was found in crystalline β-Bi2O3 form on both types of substrates without any additional heat treatment applied. Though the distribution of bismuth oxide on titanium dioxide was found to depend strongly on particle size and deposition time used, the composite materials exhibited significantly enhanced visible light photocatalytic activity compared to either of the commercial titania materials used as a substrate.

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Preparation of a visible light-driven Bi2O3–TiO2 composite photocatalyst by an ethylene glycol-assisted sol–gel method, and its photocatalytic properties

Cited by 18 publications

References 25 publications

Preparation of g-C3N4/BiOX (X = Cl, Br, I) composites, and their photocatalytic activity under visible light irradiation

Preparation of g-C3N4/BiOX (X = Cl, Br, I) composites, and their photocatalytic activity under visible light irradiation

TiO2/g-C3N4 nanosheets hybrid photocatalyst with enhanced photocatalytic activity under visible light irradiation

Characterisation and properties of visible light-active bismuth oxide-titania composite photocatalysts

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