Potential of Bi2WO6-based heterojunction photocatalysts for environmental remediation

Belousov, Artem S.; Parkhacheva, Alina A.; Сулейманов, Е. В.; Shafiq, Iqrash

doi:10.1016/j.mtchem.2023.101633

Cited by 12 publications

(4 citation statements)

References 325 publications

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“…[154][155][156] The formation of heterojunctions allows for the clever design of structures, enabling the control of properties and the optimization of catalytic performance in various reactions. 157 When two materials in a heterojunction have distinct optical properties, photoinduced electron-hole pairs can be generated to enhance the photocatalytic activity of the catalyst. This method is an extensively studied and applied strategy for photocatalyst modification.…”

Section: Photocatalysismentioning

confidence: 99%

Applications of bismuth-based nanoparticles for the removal of pollutants in wastewater: a review

Jiang,

Zhang,

Gong

2024

Environ. Sci.: Nano

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Section: Photocatalysismentioning

confidence: 99%

Applications of bismuth-based nanoparticles for the removal of pollutants in wastewater: a review

Jiang,

Zhang,

Gong

2024

Environ. Sci.: Nano

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“…The smaller the E g value, the wider the spectral range of the light response, resulting in efficient use of visible light. The spectral range of the light response for semiconductors can be enlarged by doping or co-doping with metals and nonmetals or by preparing heterostructures, which will further narrow the band gap, e.g., (N, Ta)-TiO 2 , C-TiO 2 , g-CN/TiO 2 , and ZnO/TiO 2 /RGO [ 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ].…”

Section: Basic Principles Of Photocatalysismentioning

confidence: 99%

Reaction Steps in Heterogeneous Photocatalytic Oxidation of Toluene in Gas Phase—A Review

Tulebekov,

Orazov,

Satybaldiyev

et al. 2023

Molecules

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A review of the current literature shows there is no clear consensus regarding the reaction mechanisms of air-borne aromatic compounds such as toluene by photocatalytic oxidation. Potential oxidation reactions over TiO2 or TiO2-based catalysts under ultraviolet and visible (UV/VIS) illumination are most commonly considered for removal of these pollutants. Along the pathways from a model pollutant, toluene, to final mineralization products (CO2 and H2O), the formation of several intermediates via specific reactions include parallel oxidation reactions and formation of less-reactive intermediates on the TiO2 surface. The latter may occupy active adsorption sites and causes drastic catalyst deactivation in some cases. Major hazardous gas-phase intermediates are benzene and formaldehyde, classified by the International Agency for Research on Cancer (IARC) as Group 1 carcinogenic compounds. Adsorbed intermediates leading to catalyst deactivation are benzaldehyde, benzoic acid, and cresols. The three most typical pathways of toluene photocatalytic oxidation are reviewed: methyl group oxidation, aromatic ring oxidation, and aromatic ring opening.

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“…Excessive emission of CO 2 into the atmosphere has caused climate changes such as the greenhouse effect and severely damaged the ecological system. , Converting CO 2 into value-added chemicals is considered as a promising strategy for reducing the level of CO 2 in the atmosphere, which would benefit sustainable development. ,, Photothermal catalytic CO 2 reduction is a photothermal co-catalytic process that integrates a direct photocatalytic process and an indirect thermocatalytic process in one catalyst system, combining the high selectivity of photocatalysis and the high yield of thermal catalysis, with minimized energy consumption. − Bismuth tungstate (Bi 2 WO 6 ) is a typical photothermal catalyst, composed of alternating layers of (Bi 2 O 2 ) 2+ and (WO 4 ) 2– in which photogenerated electrons can be captured and stored in the form of excited Bi (3– x )+ sites. − Currently, the photothermal conversion of CO 2 over pure Bi 2 WO 6 suffers from low efficiency due to its poor light-harvesting ability and fast recombination of photogenerated electrons and holes. − …”

Section: Introductionmentioning

confidence: 99%

Hierarchical Hollow TiO₂@Bi₂WO₆ with Light-Driven Excited Bi^(3–x)+ Sites for Efficient Photothermal Catalytic CO₂ Reduction

Liu,

Yu,

Liu

et al. 2024

Inorg. Chem.

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Converting CO 2 into valuable chemicals via sustainable energy sources is indispensable for human development. Photothermal catalysis combines the high selectivity of photocatalysis and the high yield of thermal catalysis, which is promising for CO 2 reduction. However, the present photothermal catalysts suffer from low activity due to their poor light absorption ability and fast recombination of photogenerated electrons and holes. Here, a TiO 2 @Bi 2 WO 6 heterojunction photocatalyst featuring a hierarchical hollow structure was prepared by an in situ growth method. The visible light absorption and photothermal effect of the TiO 2 @Bi 2 WO 6 photocatalyst is promoted by a hierarchical hollow structure, while the recombination phenomenon is significantly mitigated due to the construction of the heterojunction interface and the existence of excited Bi (3−x)+ sites. Such a catalyst exhibits excellent photothermal performance with a CO yield of 43.7 μmol h −1 g −1 , which is 15 and 4.7 times higher than that of pure Bi 2 WO 6 and that of physically mixed TiO 2 /Bi 2 WO 6 , respectively. An in situ study shows that the pathway for the transformation of CO 2 into CO over our TiO 2 @Bi 2 WO 6 proceeds via two important intermediates, including COO − and COOH − . Our work provides a new idea of excited states for the design and synthesis of highly efficient photothermal catalysts for CO 2 conversion.

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Potential of Bi2WO6-based heterojunction photocatalysts for environmental remediation

Cited by 12 publications

References 325 publications

Applications of bismuth-based nanoparticles for the removal of pollutants in wastewater: a review

Applications of bismuth-based nanoparticles for the removal of pollutants in wastewater: a review

Reaction Steps in Heterogeneous Photocatalytic Oxidation of Toluene in Gas Phase—A Review

Hierarchical Hollow TiO₂@Bi₂WO₆ with Light-Driven Excited Bi^(3–x)+ Sites for Efficient Photothermal Catalytic CO₂ Reduction

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Potential of Bi2WO6-based heterojunction photocatalysts for environmental remediation

Cited by 12 publications

References 325 publications

Applications of bismuth-based nanoparticles for the removal of pollutants in wastewater: a review

Applications of bismuth-based nanoparticles for the removal of pollutants in wastewater: a review

Reaction Steps in Heterogeneous Photocatalytic Oxidation of Toluene in Gas Phase—A Review

Hierarchical Hollow TiO2@Bi2WO6 with Light-Driven Excited Bi(3–x)+ Sites for Efficient Photothermal Catalytic CO2 Reduction

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Product

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Hierarchical Hollow TiO₂@Bi₂WO₆ with Light-Driven Excited Bi^(3–x)+ Sites for Efficient Photothermal Catalytic CO₂ Reduction