PH-induced structural evolution, photodegradation mechanism and application of bismuth molybdate photocatalyst

Chen, Chaoli; Wang, Yong; Yi, Zao; Wang, Shifa; Ma, Jinyuan; Gao, Huajing; Wu, Xianwen; Liu, Guorong; Yang, Hua

doi:10.1016/j.apt.2022.103858

Cited by 39 publications

(10 citation statements)

References 60 publications

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“…Based on literature [14] and energy band theory, the photocatalytic mechanism of spinel NiAl 2 O 4 is depicted in figure 13. The conduction band potential (E CB ) and valence band potential (E VB ) of spinel NiAl 2 O 4 can be calculated by equations ( 12) and ( 13) [52][53][54][55][56][57][58][59].…”

Section: Photocatalytic Mechanismmentioning

confidence: 99%

Nano spinel NiAl₂O₄: structure, optical and photocatalytic performance evaluation and optimization

Yu,

Wang,

Xie

et al. 2023

J. Phys.: Condens. Matter

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Four kinds of spinel NiAl2O4 were synthesized by the polyacrylamide gel method using Al2(SO4)3·18H2O and Al(NO3)3·9H2O as aluminum salts and anhydrous NiSO4 and NiSO4·6H2O as nickel salts. The effects of different aluminum salts and nickel salts on the structure, optical and photocatalytic activity of spinel NiAl2O4 were confirmed by various characterizations. There is no NiO impurity in the spinel NiAl2O4 synthesized with Al2(SO4)3·18H2O as aluminum salt, while NiAl2O4, NiO and C–O functional group coexist in the target product with Al(NO3)3·9H2O as aluminum salt, and C–O functional group and NiO inhibits the photocatalytic activity of the system. Based on photocatalytic experiment, response surface methodology and free radical verification experiment, the influence of experimental parameters including synthesis pathway, initial drug concentration, initial pH and catalyst content on the photocatalytic activity of spinel NiAl2O4 and the main active species involved in the reaction were investigated. The degradation percentage of spinel NiAl2O4 synthesized with Al2(SO4)3·18H2O as aluminum salt and NiSO4·6H2O as nickel salt was 86.3% at the initial concentration of 50 mg l−1, pH = 5.33 and catalyst content of 1 g l−1. The mechanism investigation confirmed that the C–O functional group plays the dual role of impurity level and electron transfer in the degradation of tetracycline hydrochloride by spinel NiAl2O4.

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Section: Photocatalytic Mechanismmentioning

confidence: 99%

Nano spinel NiAl₂O₄: structure, optical and photocatalytic performance evaluation and optimization

Yu,

Wang,

Xie

et al. 2023

J. Phys.: Condens. Matter

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“…Subsequently, these intermediates are decomposed into organic fragments (e.g., m / z = 143, 122, 102, 94, 74) via cleavage of the CC double bond, dislodging of the dimethylamino group, cleavage of the C–NH–C bond, hydroxylation, and opening of the benzene rings. Ultimately, the organic fragments are completely decomposed and mineralized into inorganic molecules without toxicity like CO 2 , H 2 O, and NH 4 + …”

Section: Resultsmentioning

confidence: 99%

Construction of Z-Scheme Ag₂MoO₄/ZnWO₄ Heterojunctions for Photocatalytically Removing Pollutants

Zhang¹,

Ma²,

Sun³

et al. 2023

Langmuir

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Facilitation of the photocarrier separation is a crucial strategy for developing highly efficient photocatalysts in eliminating environmental pollutants. Herein we have developed a new kind of Ag 2 MoO 4 /ZnWO 4 (AMO/ZWO) composite photocatalysts with a Z-scheme mechanism by anchoring AMO nanoparticles onto ZWO nanorods. Multiple characterization methodologies and density functional theory (DFT) calculations were employed to study the performances of the AMO/ZWO heterojunctions as well as the underlying photocatalytic mechanism. Simulated-sunlight-driven photodegradation experiments for removing methylene blue (MB) demonstrates that the 8%AMO/ZWO heterojunction can photocatalytically remove 99.8% of MB within 60 min, and the reaction rate constant is obtained as 0.10199 min −1 , which is enhanced by 6.8 (or 4.9) times when compared with that of pure ZWO (or AMO). On the base of the experimental results and DFT calculations, the enhanced photocatalytic mechanism of the AMO/ZWO heterojunctions was revealed to be the efficient separation of photocarriers via a Z-scheme transfer process. In addition, photodegradion of various organic pollutants over 8%AMO/ZWO was further compared and aimed at incorporating it into industrial application in pollutant removal.

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“…Finally, the organic fragments are further oxidized and mineralized to non-toxic inorganic molecules CO 2 , H 2 O, NO 3 − and SO 4 2− . 69…”

Section: Resultsmentioning

confidence: 99%

Construction of a Z-scheme Ag₂MoO₄/BiOBr heterojunction for photocatalytically removing organic pollutants

Wang

Sun

et al. 2022

Dalton Trans.

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PH-induced structural evolution, photodegradation mechanism and application of bismuth molybdate photocatalyst

Cited by 39 publications

References 60 publications

Nano spinel NiAl₂O₄: structure, optical and photocatalytic performance evaluation and optimization

Nano spinel NiAl₂O₄: structure, optical and photocatalytic performance evaluation and optimization

Construction of Z-Scheme Ag₂MoO₄/ZnWO₄ Heterojunctions for Photocatalytically Removing Pollutants

Construction of a Z-scheme Ag₂MoO₄/BiOBr heterojunction for photocatalytically removing organic pollutants

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PH-induced structural evolution, photodegradation mechanism and application of bismuth molybdate photocatalyst

Cited by 39 publications

References 60 publications

Nano spinel NiAl2O4: structure, optical and photocatalytic performance evaluation and optimization

Nano spinel NiAl2O4: structure, optical and photocatalytic performance evaluation and optimization

Construction of Z-Scheme Ag2MoO4/ZnWO4 Heterojunctions for Photocatalytically Removing Pollutants

Construction of a Z-scheme Ag2MoO4/BiOBr heterojunction for photocatalytically removing organic pollutants

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Product

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Nano spinel NiAl₂O₄: structure, optical and photocatalytic performance evaluation and optimization

Nano spinel NiAl₂O₄: structure, optical and photocatalytic performance evaluation and optimization

Construction of Z-Scheme Ag₂MoO₄/ZnWO₄ Heterojunctions for Photocatalytically Removing Pollutants

Construction of a Z-scheme Ag₂MoO₄/BiOBr heterojunction for photocatalytically removing organic pollutants