Hydrothermal Synthesis of Graphitic Carbon Nitride–Bi<sub>2</sub>WO<sub>6</sub> Heterojunctions with Enhanced Visible Light Photocatalytic Activities

Tian, Yue; Chang, Binbin; Lu, Jiangli; Fu, Jie; Xi, Fengna; Dong, Xiaoping

doi:10.1021/am4013819

Cited by 480 publications

(241 citation statements)

References 43 publications

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“…It was possible that with the addition of AO, holes were quenched, thus, more electrons reacted with O 2 to form ÁO 2 -instead of the rapid recombination with holes, it could effectively accelerate the photogenerated electron-hole pairs separation. This phenomenon was observed in the previous study [27,40,41]. In the Ag 2 CO 3 system, the degradation rates of RhB were inhibited when these three scavengers were added, respectively, and the inhibition performance followed the order p-BQ [ AO [ t-BuOH (Fig.…”

Section: Resultssupporting

confidence: 82%

Enhanced visible-light photocatalytic activity and stability over g-C3N4/Ag2CO3 composites

et al. 2014

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A facile direct growth method was developed for the fabrication of Ag 2 CO 3 nanoparticles on the surface of g-C 3 N 4 at room temperature. The as-prepared g-C 3 N 4 / Ag 2 CO 3 composites were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy with energy dispersion X-ray spectroscopy, UV-vis diffuse reflectance spectroscopy, and photoluminescence spectroscopy. The photocatalytic activities were evaluated by degrading Rhodamine B dye. The results indicated that Ag 2 CO 3 nanoparticles with the size of 5-10 nm were finely distributed on the surface of g-C 3 N 4 sheet, leading to the enhancement of the photocatalytic activity. And when the mass ratio of g-C 3 N 4 to Ag 2 CO 3 was 1:4, the as-prepared composites exhibited the optimum photocatalytic activity, which was approximately 8 and 3 times higher than pure g-C 3 N 4 and Ag 2 CO 3 , respectively. The enhanced photocatalytic performance could be attributed to the synergetic effects between g-C 3 N 4 and Ag 2 CO 3 , including the smaller particle size of Ag 2 CO 3 and high charge separation efficiency of the photogenerated electron-hole pair. More attractively, the stability of Ag 2 CO 3 was improved due to its highly dispersion on g-C 3 N 4 sheet. In addition, based on the experimental results, the Z-scheme mechanism for the photodegradation over g-C 3 N 4 /Ag 2 CO 3 composites was proposed.

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Section: Resultssupporting

confidence: 82%

Enhanced visible-light photocatalytic activity and stability over g-C3N4/Ag2CO3 composites

et al. 2014

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“…1,13 It is expressly thermal and photochemical stable owing to the high polymeric degree and p-conjugated structure and can thus undergo photocatalysis under visible light without modication.…”

Section: 7-9mentioning

confidence: 99%

“…1,20 Active species trapping and hydroxyl radical quanti-cation experiments were therefore conducted to estimate and propose the possible photocatalytic mechanism, as shown in Fig. 10.…”

Section: Proposed Photocatalytic Mechanismmentioning

confidence: 99%

Construction of exfoliated g-C3N4 nanosheets–BiOCl hybrids with enhanced photocatalytic performance

et al. 2014

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Exfoliated g-C 3 N 4 nanosheets (CNs) were composited with bismuth oxychloride (BiOCl) to fabricate a series of hybrids via a facile chemical deposition-precipitation method in this investigation. The as-synthesized BiOCl-CNs hybrids were then fully characterized by a collection of analytical techniques. It was obviously observed that CNs were in intimate contact with hierarchical BiOCl flowerlike units to form heterojunction structures, which facilitates transfer and efficient separation of photoinduced electronhole pairs, thus greatly increasing catalytic activity upon visible light irradiation. Together with other merits such as enlarged specific surface area, favorable optical properties, and suitable energy-band structures, these robust BiOCl-CNs hybrids showed significantly enhanced photocatalytic performance towards Rhodamine B (RhB) dye removal. Under identical conditions, the apparent photocatalytic reaction rate of the best hybrid BiOCl-CNs-3% was about 2.1 and 26.6 times as high as those of BiOCl and CNs alone, respectively. A possible photocatalytic mechanism was also proposed by means of active species trapping measurements, revealing that superoxide radicals (cO 2 À ) played a crucial role during the catalytic process.

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“…Thus, its bandgap was much larger than that of the macroporous samples, being consistent with its UV-vis absorbance spectrum ( Figure S3 in the supplementary material 19 ). It is known that the mechanism for photocatalytic degradation of organic pollutant is closely related to the photocatalyst used, [22][23][24] in which the potential levels of band edges play a crucial role. For example, Katsumata et al used bisphenol A as the target organic pollutant and proved that the photocatalytic degradation mechanism over Ag 3 PO 4 catalyst was direct hole-oxidation.…”

mentioning

confidence: 99%

“…22 Tian et al revealed that the degradation of methyl orange over C 3 N 4 /Bi 2 WO 6 heterojunctions was primarily dependent on the oxidation of O 2 · − . 23 Bui et al demonstrated that ·OH was the main oxygen species in the photocatalytic degradation of benzene by anatase TiO 2 . 24 So far, however, few works have been reported in the photocatalytic degradation of organic pollutant, especially for the mechanistic investigation, over GaN/ZnO solid solution.…”

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confidence: 99%

Enhanced photocatalytic degradation of 2-propanol over macroporous GaN/ZnO solid solution prepared by a novel sol-gel method

et al. 2015

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Macroporous GaN/ZnO solid solution photocatalyst is synthesized through a novel sol-gel method under mild conditions. The performance of as-synthesized solid solution photocatalyst is evaluated for decomposition of gaseous 2-propanol (IPA). It is found that due to enhancement in both the adsorption to gaseous IPA and the absorbance to visible light, the porous GaN/ZnO solid solution exhibits a good photocatalytic performance for IPA decomposition. Moreover, the mechanism for photocatalytic degradation IPA over porous GaN/ZnO solid solution is also investigated in comparison with those for the two end materials ZnO and GaN. The trapping effects with different scavengers prove that both the photoexcited electrons and holes affect the IPA photodegradation process, simultaneously.

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Hydrothermal Synthesis of Graphitic Carbon Nitride–Bi₂WO₆ Heterojunctions with Enhanced Visible Light Photocatalytic Activities

Cited by 480 publications

References 43 publications

Enhanced visible-light photocatalytic activity and stability over g-C3N4/Ag2CO3 composites

Enhanced visible-light photocatalytic activity and stability over g-C3N4/Ag2CO3 composites

Construction of exfoliated g-C3N4 nanosheets–BiOCl hybrids with enhanced photocatalytic performance

Enhanced photocatalytic degradation of 2-propanol over macroporous GaN/ZnO solid solution prepared by a novel sol-gel method

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Hydrothermal Synthesis of Graphitic Carbon Nitride–Bi2WO6 Heterojunctions with Enhanced Visible Light Photocatalytic Activities

Cited by 480 publications

References 43 publications

Enhanced visible-light photocatalytic activity and stability over g-C3N4/Ag2CO3 composites

Enhanced visible-light photocatalytic activity and stability over g-C3N4/Ag2CO3 composites

Construction of exfoliated g-C3N4 nanosheets–BiOCl hybrids with enhanced photocatalytic performance

Enhanced photocatalytic degradation of 2-propanol over macroporous GaN/ZnO solid solution prepared by a novel sol-gel method

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Hydrothermal Synthesis of Graphitic Carbon Nitride–Bi₂WO₆ Heterojunctions with Enhanced Visible Light Photocatalytic Activities