Controllable synthesis and efficient photocatalytic activity of BiOF nanodisks exposed with {101} facets, instead of {001} facets

Zhang, An; Teng, Fei; Zhai, Yifei; Liu, Zhe; Hao, Weiyi; Liu, Zailun; Yang, Zhicheng; Gu, Wenhao

doi:10.1016/j.jallcom.2019.04.239

Cited by 17 publications

(5 citation statements)

References 61 publications

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“…As shown in Figure 3a, for Bi1F1, the binding energy of Bi 4f 5/2 and Bi 4f 7/2 is ≈0.4 eV lower than that of Bi1F3, suggesting a lower valence state or a higher electron cloud density of Bi in Bi1F1 than in Bi1F3. [46] In addition, as shown by the O 1s core-level XPS results, the Bi-O bond is clearly formed at ≈530 eV, which is consistent with the conclusion that the formed crystal is BiO x F y (Figure 3a). Moreover, compared with Bi1F3, both the binding energy of the Bi-O bond and the Bi-F bond of Bi1F1 have moved to a lower position by ≈0.28 eV (Figure 3b,c).…”

Section: Resultssupporting

confidence: 85%

Influence of Graphene Oxide Surface on the Synthesis and Structure of BiO_xF_y at Ambient Conditions

Zhan

Lei

Zhang

2022

Adv Materials Inter

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Due to its rich functional groups and large specific surface area, graphene oxide (GO) will inevitably interact with the surrounding medium in practical applications. Although it has been found that this surface interaction of GO affects the crystallization process, it is still unclear whether it affects chemical reactions and reaction kinetics. Here, by studying the synthesis of BiOxFy crystals on the surface of GO under environmental conditions, it is shown that the surface interaction of GO affects the reaction process by changing the microenvironment. When the source ratio of F to Bi is 1, the morphology and structure of BiOxFy crystals synthesized on the surface of GO are significantly different from those obtained in the solution without GO. Moreover, the morphology, structure, and even chemical composition of the crystals formed on the surface of GO will change with the change of the element ratio of F/Bi. And a new bismuth‐containing crystal can be formed on the GO nanosheets when the F/Bi ratio is less than 0.6 in the reaction solution. This research not only explains the effect of GO surface dynamic interaction on crystal synthesis, but also provides new ideas for the design and synthesis of new 2D materials.

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Section: Resultssupporting

confidence: 85%

Influence of Graphene Oxide Surface on the Synthesis and Structure of BiO_xF_y at Ambient Conditions

Zhan

Lei

Zhang

2022

Adv Materials Inter

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“…[47] To study the influence of the monolayer interface on the formation of heterostructures, we also calculated the electronic properties of BiOF(001), CdS(001) and g-C 3 N 4 (001), corresponding to CdS(001) maintain direct band gaps, and the band gap values are 3.877 eV and 2.698 eV, respectively, which are larger than the band gap of the bulk element, which has a small error between the previous research results. [48,49] The calculation results show that the band gap of g-C 3 N 4 (001) is 2.801 eV, like bulk g-C 3 N 4 , it belongs to the indirect bandgap semiconductor, which is consistent with the conclusions obtained by previous studies. [50] 2.a), which is consistent with the previous literature.…”

Section: Electronic Propertiessupporting

confidence: 89%

Theoretical Study on two Direct Z‐scheme Heterostructure Photocatalysts for Efficient Photohydrolysis and Catalytic Oxidation of Formaldehyde, CdS/BiOF and g‐C₃N₄/BiOF

Zhang

et al. 2022

ChemistrySelect

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Graphitic carbon nitride (g‐C3N4) and cadmium sulfide (CdS) have attracted much attention due to their suitable band gap and excellent photocatalytic activity.Although BiOF cannot respond to visible light due to its ultra‐high band gap (3.6 eV), its strong oxidizing property is attractive to researchers.Therefore, in this study, we employed first‐principles studies to design mediator‐free CdS/BiOF and g‐C3N4/BiOF heterostructured photocatalysts. Then, the band structures, optical properties, charge transfer and radical generation reactions of the CdS/BiOF and g‐C3N4/BiOF heterostructures were calculated, respectively.The results show that the heterostructure exhibits hydrogen evolution and reactive radical generation potential under visible light irradiation. In addition, an interfacial electric field is generated during the interfacial charge transfer process of the heterostructure, and the generated interfacial electric field improves the separation efficiency of photogenerated carriers. This improvement is attributed to CdS (or g‐C3N4) acting as an electron acceptor, enabling the migration of photogenerated carriers at the interface to conform to the direct z‐scheme. Furthermore, we designed a method for catalytic oxidation of formaldehyde on the surface of heterostructures by exploiting the strong oxidizing properties of BiOF, which broadened the applicable scope of CdS/BiOF and g‐C3N4/BiOF heterostructures. This work facilitates the design of novel Z‐scheme photocatalysts and provides new insights into the Z‐scheme charge transfer mechanism in the field of solar energy conversion.

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“…The X‐ray diffractometry (XRD) was used to study the crystal structure of BiOF, BiF 3 , and Bi 2 O 3 , and the comparison was made with the standard card of JCPDS#86‐1648, JCPDS#73‐1988, and JCPDS#29‐0236, respectively (Figure 1b). [ 12 ] All the diffraction peaks were attributed to the standard card number, and no impurity peak was detected. The main peaks in BiOF are located at 10°, 27.2°, and 30°, respectively, corresponding to the crystal plane of (001), (101), and (002) in the standard card.…”

Section: Resultsmentioning

confidence: 99%

Dual‐Anion Regulation for Reversible and Energetic Aqueous Zn–CO₂ Batteries

Wang,

Aslam,

Nie

et al. 2023

Small Methods

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Aqueous Zn–CO2 batteries can not only convert CO2 into high‐value chemicals but also store/output electric energy for external use. However, their performance is limited by sluggish and complicated CO2 electroreduction at the cathode. Herein, a dual‐anion regulated Bi electrocatalyst is developed to selectively reduce CO2 to formate with a Faradaic efficiency of up to 97% at a large current density of 250 mA cm−2. With O and/or F, the rate‐determine step of CO2 electroreduction has been manipulated (from the first hydrogenation to *HCOOH desorption step) with a reduced energy barrier. Significantly, the fabricated Zn–CO2 battery exhibits a high discharge voltage of 1.2 V, optimal power density of 4.51 mW cm−2, remarkable energy density of 802 Wh kg−1, and energy‐conversion efficiency of 70.74%, stability up to 200 cycles and 68 h. This study provides possible strategies to fabricate reversible and energetic aqueous Zn–CO2 batteries by addressing cathodic problems.

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Controllable synthesis and efficient photocatalytic activity of BiOF nanodisks exposed with {101} facets, instead of {001} facets

Cited by 17 publications

References 61 publications

Influence of Graphene Oxide Surface on the Synthesis and Structure of BiO_xF_y at Ambient Conditions

Influence of Graphene Oxide Surface on the Synthesis and Structure of BiO_xF_y at Ambient Conditions

Theoretical Study on two Direct Z‐scheme Heterostructure Photocatalysts for Efficient Photohydrolysis and Catalytic Oxidation of Formaldehyde, CdS/BiOF and g‐C₃N₄/BiOF

Dual‐Anion Regulation for Reversible and Energetic Aqueous Zn–CO₂ Batteries

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Controllable synthesis and efficient photocatalytic activity of BiOF nanodisks exposed with {101} facets, instead of {001} facets

Cited by 17 publications

References 61 publications

Influence of Graphene Oxide Surface on the Synthesis and Structure of BiOxFy at Ambient Conditions

Influence of Graphene Oxide Surface on the Synthesis and Structure of BiOxFy at Ambient Conditions

Theoretical Study on two Direct Z‐scheme Heterostructure Photocatalysts for Efficient Photohydrolysis and Catalytic Oxidation of Formaldehyde, CdS/BiOF and g‐C3N4/BiOF

Dual‐Anion Regulation for Reversible and Energetic Aqueous Zn–CO2 Batteries

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Product

Resources

About

Influence of Graphene Oxide Surface on the Synthesis and Structure of BiO_xF_y at Ambient Conditions

Influence of Graphene Oxide Surface on the Synthesis and Structure of BiO_xF_y at Ambient Conditions

Theoretical Study on two Direct Z‐scheme Heterostructure Photocatalysts for Efficient Photohydrolysis and Catalytic Oxidation of Formaldehyde, CdS/BiOF and g‐C₃N₄/BiOF

Dual‐Anion Regulation for Reversible and Energetic Aqueous Zn–CO₂ Batteries