A nanostructured CuWO4/Mn3O4 with p/n heterojunction as photoanode toward enhanced water oxidation

Li, Kezhen; Zhang, Chunyong; Li, Xia; Du, Yukou; Yang, Ping; Zhu, Mingshan

doi:10.1016/j.cattod.2018.11.003

Cited by 48 publications

(16 citation statements)

References 53 publications

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“…The binding energies of Fe–O, Ta–O, and O ads in sample Cu 2 O/SFTO(MX) have no obvious change compared with those of pristine SFTO. While for samples Cu 2 O/SFTO, Cu 2 O/V O–Fe -SFTO, and Cu 2 O/V O–Fe,Ta -SFTO, the chemical environment of O–Fe and O–Ta changes due to the formation of heterojunction . The change amplitude in binding energies of O–Fe and O–Ta decreases in the following order: Cu 2 O/V O–Fe,Ta -SFTO > Cu 2 O/V O–Fe -SFTO > Cu 2 O/SFTO (Table S3), which suggests that sample Cu 2 O/V O–Fe,Ta -SFTO has the strongest interface interaction, followed by Cu 2 O/V O–Fe -SFTO.…”

Section: Resultsmentioning

confidence: 91%

Selective Bonding Effect of Heterologous Oxygen Vacancies in Z-Scheme Cu₂O/SrFe_0.5Ta_0.5O₃ Heterojunctions for Constructing Efficient Interfacial Charge-Transfer Channels and Enhancing Photocatalytic NO Removal Performances

et al. 2021

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An interfacial structure is crucial to the photoinduced electron transport for a heterostructure photocatalyst. Constructing an interfacial electron channel with an optimized interfacial structure can efficiently improve the electron-transfer efficiency. Herein, the rapid electron-transfer channels were built up in a Cu2O/SrFe0.5Ta0.5O3 heterojunction (Cu2O/SFTO) based on the selective bonding effect of heterologous surface oxygen vacancies in the SFTO component. The heterologous surface oxygen vacancies, namely, VO–Fe and VO–Ta, respectively, adjacent to Fe and Ta atoms, were introduced into fabricating the Z-scheme Cu2O/SFTO heterojunction. Compared with sample Cu2O/SFTO with VO–Fe, the photocatalytic NO removal efficiency of sample Cu2O/SFTO with VO‑Fe and VO‑Ta was increased by 22.5%. The enhanced photocatalytic performance originated from the selective bonding effect of heterologous VO–Fe and VO–Ta on the interfacial electron-separating and -transfer efficiency. VO–Fe is the main body to construct the interfacial electron-transfer channels by forming interfacial Fe–O–Cu(I) bonds, which causes lattice distortion at the interface, and VO–Ta can optimize the structure of interfacial channels by balancing the electron density of SFTO to control the average space of the interface transition zone. This research provides a new cognitive perspective for constructing double perovskite oxide-based heterostructure photocatalysts.

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Section: Resultsmentioning

confidence: 91%

Selective Bonding Effect of Heterologous Oxygen Vacancies in Z-Scheme Cu₂O/SrFe_0.5Ta_0.5O₃ Heterojunctions for Constructing Efficient Interfacial Charge-Transfer Channels and Enhancing Photocatalytic NO Removal Performances

et al. 2021

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“…[39] As for the high-resolution of Cu 2p spectrum, the binding energies of Cu 2p 3/2 (934.3 eV) and Cu 2p 1/2 (954.3 eV) belong to the Cu 2 + of CuWO 4 (Figure 3c). [40] In addition, the three satellite peaks for Cu 2 + are also observed in the high-resolution Cu 2p spectrum. The O 1s spectra can be deconvoluted into two peaks at 530.2 and 531.2 eV (Figure 3d) corresponding to the lattice oxygen (O L ) and the hydroxyl oxygen (O OH ), respectively.…”

Section: Resultsmentioning

confidence: 91%

Ultrasonic Spray Pyrolysis‐assisted Fabrication of Ultrathin CuWO₄ Films with Improved Photoelectrochemical Performance

Duan

Nahrawy

et al. 2021

ChemNanoMat

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CuWO 4 is a promising n-type oxide semiconductor for photoelectrochemical (PEC) applications due to the suitable band gap and good photochemical stability. An easy and large-scale fabrication of ultrathin CuWO 4 films with improved PEC performance is highly desired for future practical application but still challenging. Considering that the ultrasonic spray pyrolysis approach is a low-cost and scalable technique for fabricating films with controllable thickness, we here report the controllable fabrication of ultrathin CuWO 4 films with improved PEC performance by an automatic ultrasonic spray pyrolysis method. The effects of different tungsten sources and film thickness on the PEC performance of the resultant CuWO 4 film were studied in detail. We find that the ultrathin CuWO 4 film prepared from the ammonium metatungstate with a thickness of 2.16 μm shows the best PEC performance of 41 μA cm À 2 at 1.23 V vs.RHE for water oxidation under visible light irradiation. We also explored the different charge transfer mechanism and PEC performance of the resultant CuWO 4 films under back and front illumination.

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“…† The screen-printing process used to produce the Fe 2 P and Fe 3 P SPEs utilised within this study is explained within the ESI † and is also described in more depth in previous studies. 11,43–45 Herein, the potential is referenced to the reversible hydrogen electrode (RHE) utilising the following equation, as is common within the literature: 46–48 E RHE = E SCE + 0.059pH + 0.242 V (at 25 °C).…”

Section: Methodsmentioning

confidence: 99%

Enhancing the efficiency of the hydrogen evolution reaction utilising Fe₃P bulk modified screen-printed electrodes via the application of a magnetic field

2021

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A nanostructured CuWO4/Mn3O4 with p/n heterojunction as photoanode toward enhanced water oxidation

Cited by 48 publications

References 53 publications

Selective Bonding Effect of Heterologous Oxygen Vacancies in Z-Scheme Cu₂O/SrFe_0.5Ta_0.5O₃ Heterojunctions for Constructing Efficient Interfacial Charge-Transfer Channels and Enhancing Photocatalytic NO Removal Performances

Selective Bonding Effect of Heterologous Oxygen Vacancies in Z-Scheme Cu₂O/SrFe_0.5Ta_0.5O₃ Heterojunctions for Constructing Efficient Interfacial Charge-Transfer Channels and Enhancing Photocatalytic NO Removal Performances

Ultrasonic Spray Pyrolysis‐assisted Fabrication of Ultrathin CuWO₄ Films with Improved Photoelectrochemical Performance

Enhancing the efficiency of the hydrogen evolution reaction utilising Fe₃P bulk modified screen-printed electrodes via the application of a magnetic field

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A nanostructured CuWO4/Mn3O4 with p/n heterojunction as photoanode toward enhanced water oxidation

Cited by 48 publications

References 53 publications

Selective Bonding Effect of Heterologous Oxygen Vacancies in Z-Scheme Cu2O/SrFe0.5Ta0.5O3 Heterojunctions for Constructing Efficient Interfacial Charge-Transfer Channels and Enhancing Photocatalytic NO Removal Performances

Selective Bonding Effect of Heterologous Oxygen Vacancies in Z-Scheme Cu2O/SrFe0.5Ta0.5O3 Heterojunctions for Constructing Efficient Interfacial Charge-Transfer Channels and Enhancing Photocatalytic NO Removal Performances

Ultrasonic Spray Pyrolysis‐assisted Fabrication of Ultrathin CuWO4 Films with Improved Photoelectrochemical Performance

Enhancing the efficiency of the hydrogen evolution reaction utilising Fe3P bulk modified screen-printed electrodes via the application of a magnetic field

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Selective Bonding Effect of Heterologous Oxygen Vacancies in Z-Scheme Cu₂O/SrFe_0.5Ta_0.5O₃ Heterojunctions for Constructing Efficient Interfacial Charge-Transfer Channels and Enhancing Photocatalytic NO Removal Performances

Selective Bonding Effect of Heterologous Oxygen Vacancies in Z-Scheme Cu₂O/SrFe_0.5Ta_0.5O₃ Heterojunctions for Constructing Efficient Interfacial Charge-Transfer Channels and Enhancing Photocatalytic NO Removal Performances

Ultrasonic Spray Pyrolysis‐assisted Fabrication of Ultrathin CuWO₄ Films with Improved Photoelectrochemical Performance

Enhancing the efficiency of the hydrogen evolution reaction utilising Fe₃P bulk modified screen-printed electrodes via the application of a magnetic field