Performance and mechanism involved in the cascade oxidation of Mn(II) and As(III) by Bi2.15WO6 under alkaline conditions

Ren, Haitao; Jing, Meng-Zhen; Liang, Yu; Li, Tingting; Jiang, Shanwen; Lou, Ching‐Wen; Lin, Jia‐Horng; Han, Xu

doi:10.1016/j.jece.2021.106196

Cited by 8 publications

(5 citation statements)

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“…Our previous study also indicated that the adsorption of Mn( ii ) was more favorable at high pH on Bi 2.15 WO 6 . 34 This also implies the possibility of forming the surface complexes between Mn( ii ) and Bi 2.15 WO 6 . 23,50…”

Section: Resultsmentioning

confidence: 99%

“…32,33 In our previous study, we have verified that Bi 2.15 WO 6 exhibited high photocatalytic oxidation reactivity under alkaline conditions, 33 and Bi 2.15 WO 6 can catalyze the oxidation of Mn( ii ) to manganese oxides under visible light. 34 However, the photocatalytic reactivity of Bi 2.15 WO 6 and the corresponding mechanisms are still unclear. The objectives of this study are therefore to (i) investigate the photocatalytic reactivity of Bi 2.15 WO 6 in the abiotic oxidation of Mn( ii ) under visible light, and (ii) explore the corresponding mechanisms involved in the photooxidation process.…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic oxidation of Mn(ii) on the surface of Bi_2.15WO₆via the ligand-to-metal charge transfer (LMCT) pathway

Guo

Liu

Ren

et al. 2022

Phys. Chem. Chem. Phys.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photocatalytic oxidation of Mn(ii) on the surface of Bi_2.15WO₆via the ligand-to-metal charge transfer (LMCT) pathway

Guo

Liu

Ren

et al. 2022

Phys. Chem. Chem. Phys.

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“…The reaction was then carried out under a N 2 atmosphere. In order to distinguish the contributions of different ROS to H 2 O 2 generation, various scavengers such as nitroblue tetrazolium chloride (NBT) and methanol were added into the reaction systems to quench the activities of O 2 •– and •OH, respectively. To investigate whether the photocatalytic generation of H 2 O 2 occurs on the surface of Bi 2.15 WO 6 , Bi 2.15 WO 6 was soaked in 1.0 M NaF solution for 24 h to cover its surface with saturated F – .…”

Section: Methodsmentioning

confidence: 99%

Photocatalytic Generation of H₂O₂ Via a Hydrogen-Abstraction Pathway by Bi_2.15WO₆ under Visible Light

Ren,

Cai,

Zhu

et al. 2024

Langmuir

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Photocatalytic technology is a popular research area for converting solar energy into environmentally friendly chemicals and is considered the greenest approach for producing H 2 O 2 . However, the corresponding reactive oxygen species (ROS) and pathway involved in the photocatalytic generation of H 2 O 2 by the Bi 2.15 WO 6 -glucose system are still not clear. Quenching experiments have established that neither • OH nor h + contribute to the formation of H 2 O 2 , and show that the formed surface superoxo (�Bi−OO • ) and peroxo (�Bi−OOH) species are the predominant ROS in H 2 O 2 generation. In addition, various characterizations indicate the enhanced electron-transfer on the surface of Bi 2.15 WO 6 with increasing contents of glucose via the ligand-to-metal charge transfer pathway, confirming H-transfer from glucose to �Bi−OO • or �Bi−OOH. The increased production of H 2 O 2 with decreasing bond dissociation energy (BDE O−H ) values of various phenolic compounds again supports the Htransfer mechanism from phenolic compounds to �Bi−OO • and then to �Bi−OOH. DFT calculations further reveal that on the Bi 2.15 WO 6 surface, oxygen is sequentially reduced to �Bi−OO • and �Bi−OOH, while H-transfer from H 2 O or glucose to �Bi− OO • and �Bi−OOH, resulting in the production of H 2 O 2 . The lower energy barrier of H-transfer from adsorbed glucose (0.636 eV) than that from H 2 O (1.157 eV) indicates that H-transfer is more favorable from adsorbed glucose. This work gives new insight into the photocatalytic generation of H 2 O 2 by Bi 2.15 WO 6 in the presence of glucose/phenolic compounds via the H-abstraction pathway.

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“…The adsorbed As in the BWO-MnO x system was mainly As(V). From the results reported in refs [97,98], although they are interesting, it is not possible to extrapolate the contribution of photooxidation versus absorption. To avoid inconsistencies with the other data in Table 6 (which refer to the oxidized amount), these results are omitted.…”

Section: Photocatalytic Oxidation Of As(iii) Using Wo 3 Zno and Bism...mentioning

confidence: 98%

“…Owing to the magnetic property, the BiOI@Fe 2 O 3 nanocomposites can be rapidly recovered from the solution under an external magnetic field. Bi 2.15 WO 6 (BWO) [98] can be used to treat wastewater containing both Mn(II) and As(III), as it can oxidize Mn(II) to amorphous manganese oxide (MnO x ) under visible light. MnO x generated in this way can further transform As(III) to As(V).…”

Section: Photocatalytic Oxidation Of As(iii) Using Wo 3 Zno and Bism...mentioning

confidence: 99%

A Review of Visible Light Responsive Photocatalysts for Arsenic Remediation in Water

Natali Sora,

Fontana,

Pelosato

et al. 2024

Photochem

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This review summarizes the progress over the last fifteen years in visible light reactive photocatalysts for environmental arsenic remediation. The design and performance of several materials including (1) doped and surface functionalized TiO2, (2) binary composites combining TiO2 with another semiconductor that absorbs visible light radiation or a metal (Pt), (3) ternary composites incorporating TiO2, a conductive polymer that can retard electron-hole recombination and an excellent adsorbent material for the removal of As(V), (4) tungsten, zinc, and bismuth oxides, (5) g-C3N4 based catalysts, and (6) M@AgCl core–shell structures. These results show that long reaction time remains a major challenge in achieving high As(III) oxidation.

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Performance and mechanism involved in the cascade oxidation of Mn(II) and As(III) by Bi2.15WO6 under alkaline conditions

Cited by 8 publications

References 60 publications

Photocatalytic oxidation of Mn(ii) on the surface of Bi_2.15WO₆via the ligand-to-metal charge transfer (LMCT) pathway

Photocatalytic oxidation of Mn(ii) on the surface of Bi_2.15WO₆via the ligand-to-metal charge transfer (LMCT) pathway

Photocatalytic Generation of H₂O₂ Via a Hydrogen-Abstraction Pathway by Bi_2.15WO₆ under Visible Light

A Review of Visible Light Responsive Photocatalysts for Arsenic Remediation in Water

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Performance and mechanism involved in the cascade oxidation of Mn(II) and As(III) by Bi2.15WO6 under alkaline conditions

Cited by 8 publications

References 60 publications

Photocatalytic oxidation of Mn(ii) on the surface of Bi2.15WO6via the ligand-to-metal charge transfer (LMCT) pathway

Photocatalytic oxidation of Mn(ii) on the surface of Bi2.15WO6via the ligand-to-metal charge transfer (LMCT) pathway

Photocatalytic Generation of H2O2 Via a Hydrogen-Abstraction Pathway by Bi2.15WO6 under Visible Light

A Review of Visible Light Responsive Photocatalysts for Arsenic Remediation in Water

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Product

Resources

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Photocatalytic oxidation of Mn(ii) on the surface of Bi_2.15WO₆via the ligand-to-metal charge transfer (LMCT) pathway

Photocatalytic oxidation of Mn(ii) on the surface of Bi_2.15WO₆via the ligand-to-metal charge transfer (LMCT) pathway

Photocatalytic Generation of H₂O₂ Via a Hydrogen-Abstraction Pathway by Bi_2.15WO₆ under Visible Light