Fabrication of novel heterostructured few layered WS2-Bi2WO6/Bi3.84W0.16O6.24 composites with enhanced photocatalytic performance

Zou, Jian‐Ping; Ma, Jun; Luo, Jinming; Yu, Jian; He, Jian; Meng, Yongtao; Luo, Zhu; Bao, Shao-Kui; Liu, Huilong; Luo, Shenglian; Luo, Xubiao; Tong-cai, Chen; Suib, Steven L.

doi:10.1016/j.apcatb.2015.05.031

Cited by 81 publications

(29 citation statements)

References 61 publications

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“…As shown in Fig. 4(b), the binding energies of 34.7 and 36.97 eV for W 4f 5/2 peaks are attributed to W 6+ in Bi 3.84 W 0.16 O 6.24 41. As displayed in Fig.…”

Section: Resultsmentioning

confidence: 73%

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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“…As shown in Fig. 4(b), the binding energies of 34.7 and 36.97 eV for W 4f 5/2 peaks are attributed to W 6+ in Bi 3.84 W 0.16 O 6.24 41. As displayed in Fig.…”

Section: Resultsmentioning

confidence: 73%

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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“…Wang et al, described that Bi/CdS microspheres could efficiently elevate the visible light photocatalytic activity for methyl orange (MO) degradation, because of its enhanced visible light absorption and quickly charged separation caused by the introduction of Bi [29]. Dong et al, proclaimed that incorporating Bi into the semiconductor g-C 3 N 4 nanosheets showed an improved photodegradation capability of NO under visible light illumination, which could be assigned to the suppression of photodriven electrons-holes pairs, because Bi served as the recipient and communicator of the electron [18].Although photocatalytic degradation of organic pollutants via photo-oxidation has been widely disclosed in most of cases where Bi-based catalysts were employed [31,32], work about the wastewater remediation via photoreduction using Bi cocatalysts was rarely found. In this work, the BiNPs/ZnO composites were prepared herein by an easy eco-friendly synthesis method compared to that reported with a solid-state method [33].…”

mentioning

confidence: 99%

“…Although photocatalytic degradation of organic pollutants via photo-oxidation has been widely disclosed in most of cases where Bi-based catalysts were employed [31,32], work about the wastewater remediation via photoreduction using Bi cocatalysts was rarely found. In this work, the BiNPs/ZnO composites were prepared herein by an easy eco-friendly synthesis method compared to that reported with a solid-state method [33].…”

mentioning

confidence: 99%

Significantly Enhanced Aqueous Cr(VI) Removal Performance of Bi/ZnO Nanocomposites via Synergistic Effect of Adsorption and SPR-Promoted Visible Light Photoreduction

et al. 2018

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Bismuth nanoparticles (BiNPs) and Zinc Oxide photocatalysts (BiNPs/ZnO) with different Bi loadings were successfully prepared via a facile chemical method. Their morphology and structure were thoroughly characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), UV-Vis (Ultraviolet-Visible) diffuse reflectance spectroscopy (DRS), photoluminescence spectra (PL), and electrochemical impedance spectroscopy (EIS). The results showed that a modification of hexagonal wurtzite-phase ZnO nanoparticles with Bi is achievable with an intimate interfacial interaction within its composites. The performance of the photocatalytic Cr(VI) removal under visible light irradiation indicated that BiNPs/ZnO exhibited a superior removal performance to bare ZnO, Bi, and the counterpart sample prepared using a physical mixing method. The excellent performance of the BiNPs/ZnO photocatalysts could be ascribed to the synergistic effect between the considerable physical Cr (VI) adsorption and enhanced absorption intensity in the visible light region, due to the surface plasmon resonance (SPR) as well as the effective transfer and separation of the photogenerated charge carriers at the interface.Very recently, as a semimetal, bismuth (Bi) has been excavated to have direct plasma photocatalytic ability mediated by SPR (surface plasmon resonance) [16]. This property would cause the absorbed electrons to resonate inside the metal, thereby increasing the absorption of photons, and this resonance mostly occurs in the visible light region [17][18][19][20]. Similar to noble metal elements, for instance Au [21,22], Ag [23,24], and Pt [25,26], Bi is also found to be a potential candidate to activate the wide band gap photocatalysts, and is thus widely applied as a cocatalyst due to its SPR effect; many groups have done research in this area [27,28], exploring cocatalysts Bi/CdS [29], Bi/g-C 3 N 4 [18], Bi/Bi 2 O 3 [30], and Bi/(BiO) 2 CO 3 [28]. Wang et al., described that Bi/CdS microspheres could efficiently elevate the visible light photocatalytic activity for methyl orange (MO) degradation, because of its enhanced visible light absorption and quickly charged separation caused by the introduction of Bi [29]. Dong et al., proclaimed that incorporating Bi into the semiconductor g-C 3 N 4 nanosheets showed an improved photodegradation capability of NO under visible light illumination, which could be assigned to the suppression of photodriven electrons-holes pairs, because Bi served as the recipient and communicator of the electron [18].Although photocatalytic degradation of organic pollutants via photo-oxidation has been widely disclosed in most of cases where Bi-based catalysts were employed [31,32], work about the wastewater remediation via photoreduction using Bi cocatalysts was rarely found. In this work, the BiNPs/ZnO composites were prepared herein by an easy eco-friendly synthesis method compared to that reported with a so...

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“…Additionally, the stability and reusability of a photocatalyst were of great importance for practical applications . Figure (e) shows the repetitive photodegradation of phenol with the 3% Bi/Bi 2 WO 6 catalyst during five consecutive cycles.…”

Section: Resultsmentioning

confidence: 99%

The Bi/Bi₂WO₆ heterojunction with stable interface contact and enhanced visible‐light photocatalytic activity for phenol and Cr(VI) removal

Jia

Xue

Wang

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND Semiconductor photocatalysis is the most promising green and energy‐saving technology for environmental remediation. Unfortunately, photocatalysis nanotechnology for its practical application is often challenged by the low capturing ability for visible light and use of expensive noble metals. In this work, we report the non‐noble Bi nanoparticles assembled on Bi2WO6 with enhanced visible‐light photocatalytic activity for decontamination of phenol and hexavalent chromium in water. RESULTS The 3% Bi/Bi2WO6 composite had the highest photocatalytic activity compared to pristine Bi2WO6, which could completely decompose phenol into small products within 120 min. More importantly, the Cr(VI) removal rate of the 3% Bi/Bi2WO6 catalyst in the presence of triethanolamine (TEOA, 2%) after irradiation for 12 min was up to 96.2%. CONCLUSIONS The improved photocatalytic performance could be due to the fast transfer of photogenerated charge carried by the formation of an anti‐barrier layer at the interface between metal Bi nanoparticles and the n‐type Bi2WO6 semiconductor; the enhancement of electron energy may be attributed to the localized surface plasmon resonance properties of Bi nanoparticles, as well as conspicuously strengthened and broad light‐capturing ability across the whole visible‐light range. This strategy could provide some inspiration for the design of other Bi‐based semiconductor heterostructures for decomposing harmful organic pollutants in wastewater and purifying hazardous gases in the air. © 2018 Society of Chemical Industry

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Fabrication of novel heterostructured few layered WS2-Bi2WO6/Bi3.84W0.16O6.24 composites with enhanced photocatalytic performance

Cited by 81 publications

References 61 publications

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

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

Significantly Enhanced Aqueous Cr(VI) Removal Performance of Bi/ZnO Nanocomposites via Synergistic Effect of Adsorption and SPR-Promoted Visible Light Photoreduction

The Bi/Bi₂WO₆ heterojunction with stable interface contact and enhanced visible‐light photocatalytic activity for phenol and Cr(VI) removal

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Fabrication of novel heterostructured few layered WS2-Bi2WO6/Bi3.84W0.16O6.24 composites with enhanced photocatalytic performance

Cited by 81 publications

References 61 publications

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

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

Significantly Enhanced Aqueous Cr(VI) Removal Performance of Bi/ZnO Nanocomposites via Synergistic Effect of Adsorption and SPR-Promoted Visible Light Photoreduction

The Bi/Bi2WO6 heterojunction with stable interface contact and enhanced visible‐light photocatalytic activity for phenol and Cr(VI) removal

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The Bi/Bi₂WO₆ heterojunction with stable interface contact and enhanced visible‐light photocatalytic activity for phenol and Cr(VI) removal