The gas-phase photocatalytic mineralization of benzene over visible-light-driven Bi2WO6@C microspheres

Chen, Yilin; Cao, Xia; Kuang, Ji-Dong; Chen, Zhi; Chen, Jing-Ling; Lin, Bin

doi:10.1016/j.catcom.2010.09.027

Cited by 44 publications

(17 citation statements)

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“…The S2p region a small compound peak appears at E B = 163.4 eV in the 2p 3/2 peak, which is ascribed to oxidation of sulphide species. This can attributed to the SnO 2 @MoS 2 heterostructured interface can facilitate the interfacial electronhole pairs transfer process [43][44][45][46]. However, the consequence of these changes on the photoreaction is moderate.…”

Section: Resultsmentioning

confidence: 99%

“…The conduction band (CB) of MoS 2 is lower than that of SnO 2 ; hence the former can turn as a sink for the photogenerated electrons[43][44][45][46][47]. 12.For MoS 2 with the band gap energy of 2.31 eV, but it shows little photocatalytic activity due to the fast recombination effect of the electron/hole pairs in MoS 2 under UV irradiation in the current experimental conditions.…”

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Improved photocatalytic activity of MoS₂ nanosheets decorated with SnO₂ nanoparticles

et al. 2015

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MoS 2 nanosheet decorated with SnO 2 mesoporous nanoparticles were successfully prepared by a facile two-step method. MoS 2 nanosheets were pre-synthesized using a solvothermal method and then decorated with the SnO 2 mesoporous nanoparticles through a wet chemical method. The nanocomposite was characterized with powder X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersed spectrometry (EDX), high-resolution transmission electron microscopy (HRTEM), thermal gravimetric and differential thermal analysis (TG-DTA), X-ray photoelectron spectroscopy (XPS) andElectrochemcial impedance spectroscopy (EIS). SnO 2 mesoporous nanoparticles can be selectively formed and attached to the peripheral surface of the layered MoS 2 , which was confirmed by FESEM and HRTEM. The photocatalytic activity of the nanocomposite was examined with Rhodamine B (RhB) in aqueous solution under UV light irradiation. The SnO 2 nanoparticles remarkably suppressed the electron-hole recombination effect on the MoS 2 photocatalyst and improved photocatalytic activity compared to pristine MoS 2 catalyst. A higher rate of pollutant degradation was accomplished within 50 min that was three times higher than that of the pristine MoS 2 catalyst. the presence of CTAB. Photocatalysis experiments prove that this heterogeneously structured composite has higher photocatalytic activity than pristine MoS 2 . Experimental ProcedureAll chemicals were analytical grade and used as received without further purification. Preparation of MoS 2 nanosheetsTo obtain the MoS 2 nanosheets, ammonium hepta molybdate tetrahydrate, citric acid, and thiophene (C 4 H 4 S) were used as the starting materials and sulfur source. 2.05 g of ammonium heptamolybdate tetra hydrate and 1.56 g of citric acid were dissolved in distilled water and magnetically stirred for 10 min at 90˚C on a hot plate to form a homogeneous solution. The white suspension was vigorously stirred and the pH was adjusted to 3.5 with the addition of ammonia water. Then, 3.15 g of thiophene in water was added dropwise to the solution and transferred to an autoclave, which was maintained at 200˚C for 10 h. After natural cooling of the reactor down to 25˚C, the resulting precipitates were collected through centrifugation, filtered, and washed three times with distilled water and acetone. The final precipitates were dried under vacuum at 130˚C for 2 h. Preparation of MoS 2 sheets decorated with SnO 2 nanoparticlesThe MoS 2 precipitates (20 mg) were exfoliated in distilled water (25 mL) and heated at 75˚C under magnetic stirring for 30 min to form a colloidal suspension. Then, SnCl 2 •2H 2 O (2.7 g) was dissolved in the colloidal solution. HCl (1.3 mL) and H 2 O (30 mL) were added drop-wise to the solution with continuous heating and stirring for 2 h. After several trials, we optimized the concentration of CTAB to 0.05 mmol. 0.05 mmol of CTAB was added to the suspension and stirred at 110˚C for 6 h. The final products were collected, filtered, and washed three times with acetone...

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Section: Resultsmentioning

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Improved photocatalytic activity of MoS₂ nanosheets decorated with SnO₂ nanoparticles

et al. 2015

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“…The gas reactor system has been described elsewhere [23]. The catalyst powders (0.1 g) were pressed into particles of size 40-60 mesh and then packed into a fixed-bed rectangle quartz reactor.…”

Section: Evaluation Of Photocatalytic Activitymentioning

confidence: 99%

Visible-light-driven photocatalytic performance of nitrogen-doped Ti1−xZrxO2 solid solution

Gao

Luo

et al. 2013

Materials Research Bulletin

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“…Such as, the photocatalytic activity of as-synthesized graphene-Bi 2 WO 6 composite is greatly enhanced as compared with pure Bi 2 WO 6 in visible light [29][30][31][32][33]. Bi 2 WO 6 -coated carbon microspheres were prepared by a two-step hydrothermal method using glucose as carbon source and the photocatalytic performance of the Bi 2 WO 6 was significantly enhanced by the doping of carbon microspheres [34]. Also, Li et al synthesized C-Bi 2 WO 6 composite via hydrothermal method using glucose as carbon source and the resulting composite exhibited high photocatalytic activity [35].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of visible-light photocatalytic activity of silver and mesoporous carbon co-modified Bi2WO6

Zhao

Gong

Liu

et al. 2015

Applied Surface Science

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The gas-phase photocatalytic mineralization of benzene over visible-light-driven Bi2WO6@C microspheres

Cited by 44 publications

References 25 publications

Improved photocatalytic activity of MoS₂ nanosheets decorated with SnO₂ nanoparticles

Improved photocatalytic activity of MoS₂ nanosheets decorated with SnO₂ nanoparticles

Visible-light-driven photocatalytic performance of nitrogen-doped Ti1−xZrxO2 solid solution

Enhancement of visible-light photocatalytic activity of silver and mesoporous carbon co-modified Bi2WO6

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The gas-phase photocatalytic mineralization of benzene over visible-light-driven Bi2WO6@C microspheres

Cited by 44 publications

References 25 publications

Improved photocatalytic activity of MoS2 nanosheets decorated with SnO2 nanoparticles

Improved photocatalytic activity of MoS2 nanosheets decorated with SnO2 nanoparticles

Visible-light-driven photocatalytic performance of nitrogen-doped Ti1−xZrxO2 solid solution

Enhancement of visible-light photocatalytic activity of silver and mesoporous carbon co-modified Bi2WO6

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Improved photocatalytic activity of MoS₂ nanosheets decorated with SnO₂ nanoparticles

Improved photocatalytic activity of MoS₂ nanosheets decorated with SnO₂ nanoparticles