Architecture of high efficient zinc vacancy mediated Z-scheme photocatalyst from metal-organic frameworks

Hao, Xuqiang; Cui, Zhiwei; Zhou, Jun; Wang, Yicong; Hu, Yue; Wang, Ying; Zou, Zhigang

doi:10.1016/j.nanoen.2018.07.043

Cited by 192 publications

(100 citation statements)

References 57 publications

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“…TRPL decay curves were measured by an FLS920 fluorescence lifetime spectrophotometer (Edinbergh instrument, UK) under 375 nm light excitation. The TRPL decay curves were fitted by the following multiexponential equation

I (t) = I_{normal0} + {normalB}_{normal1} (normalexp - t normal/ τ_{1}) + {normalB}_{normal2} (normalexp - t normal/ τ_{2}) + {normalB}_{normal3} (normalexp - t normal/ τ_{3})

where I 0 represents the baseline correction value, B 1 , B 2, and B 3 are the pre‐exponential factors, τ 1 , τ 2, and τ 3 represent the respective lifetime (ns) in the radiative, nonradiative, and energy transfer process. The average lifetime (τ av ) was calculated using the equation

τ_{av} = (B_{1} τ_{1}^{2} + B_{2} τ_{2}^{2} + B_{3} τ_{3}^{2}) / (B_{1} normal/ τ_{1} + B_{2} normal/ τ_{2} + B_{3} τ_{3})

…”

Section: Methodsmentioning

confidence: 99%

Unraveling Photoexcited Charge Transfer Pathway and Process of CdS/Graphene Nanoribbon Composites toward Visible‐Light Photocatalytic Hydrogen Evolution

Xia

Cheng

Fan

et al. 2019

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276

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/smll.201902459. 1-10 wt% GNRs, the CdS/GNR composites with 2 wt% GNRs achieves the greatest hydrogen evolution rate of 1.89 mmol h −1 g −1 . The corresponding apparent quantum efficiency is 19.3%, which is ≈3.7 times higher than that of pristine CdS NPs. To elucidate the underlying photocatalytic mechanism, a systematic characterization, including in situ irradiated X-ray photoelectron spectroscopy and Kelvin probe measurements, is performed. In particular, the interfacial charge transfer pathway and process from CdS NPs to GNRs is revealed. This work may open avenues to fabricate GNR-based nanocomposites for solar-to-chemical energy conversion and beyond.

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I (t) = I_{normal0} + {normalB}_{normal1} (normalexp - t normal/ τ_{1}) + {normalB}_{normal2} (normalexp - t normal/ τ_{2}) + {normalB}_{normal3} (normalexp - t normal/ τ_{3})

τ_{av} = (B_{1} τ_{1}^{2} + B_{2} τ_{2}^{2} + B_{3} τ_{3}^{2}) / (B_{1} normal/ τ_{1} + B_{2} normal/ τ_{2} + B_{3} τ_{3})

…”

Section: Methodsmentioning

confidence: 99%

Unraveling Photoexcited Charge Transfer Pathway and Process of CdS/Graphene Nanoribbon Composites toward Visible‐Light Photocatalytic Hydrogen Evolution

Xia

Cheng

Fan

et al. 2019

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276

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“…A similar shift was found in the XPS spectra of S 2p (Figure d). Specifically, the BEs of S 2p 3/2 and S 2p 1/2 changed from 161.3 and 163.0 to 161.5 and 163.7 eV, respectively, after the cation‐exchange process. In addition, the shifted BEs represent changes in electron density, which indicates that CdS and MnS act as an electron acceptor and donor in CdS/MnS, respectively.…”

Section: Resultsmentioning

confidence: 98%

Smart Assembly of Sulfide Heterojunction Photocatalysts with Well‐Defined Interfaces for Direct Z‐Scheme Water Splitting under Visible Light

Liu

Zhang

2020

ChemSusChem

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Figure 4. XPS spectrao ft he as-prepared samples. a) Survey spectrum of CM-1 and high-resolution XPS b) Cd 3d spectraofC M-0 and CM-1, c) Mn 2p spectra of CM-2 and CN-3, and d) S2pspectraoft he fours amples. Figure 6. aa nd b) Ultraviolet photoelectron spectraofC M-0 and CM-3,i nw hich the linesmark the baseline and the tangents of the curve. c) The estimated opticalb and gap potential from the transformation of the UV/Vis absorption spectra ( Figure 1c). d) Z-scheme electronic band structures between CdS and MnS heterojunction photocatalysts. e) EIS plots and f) PL spectra of CM-0, CM-1, CM-2, and CM-3. Inset of (e) is the equivalent circuit to fit the plots.

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Section: Understanding the Role Of Defect Engineering On Solar Energymentioning

confidence: 99%

“…As the positive influence of the defects upon the light absorption, charge separation, and catalytic activities as well as defect visualization and quantification has been greatly investigated, it is essential to understand the roles of the defects on solar energy conversion by the photocatalysts.…”

Section: Understanding the Role Of Defect Engineering On Solar Energymentioning

confidence: 99%

“…Apart from the light absorption, the charge separation has been optimized in the defective photocatalysts, highlighting the pivot role of the defects in the photocatalysis . For example, the PEC performance of hydrogen evolution has been improved due to the optimization of charge transport and surface area using p‐type ZrO 2 nanoplates coupled ZrO 2 nanowire photocathode with OVs through hydrofluoric acid treatment (Figure a) .…”

Section: Understanding the Role Of Defect Engineering On Solar Energymentioning

confidence: 99%

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Defect Engineering of Photocatalysts for Solar Energy Conversion

et al. 2020

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Solar energy conversion is one of the most versatile approaches for sustainable energy demands. The fundamental limitations for photocatalysis remain light absorption, charge separation, and photocatalytic (PC) performance of the catalysts. For the past few decades, defect engineering has been proven to be a promising solution for converting solar energy to chemical energy. In this regard, the recent progress of defect engineering toward solar energy conversion is summarized. Beginning with defects classification, the definition of various defects, synthesized strategies, and characterization techniques of controllable material defects are presented. The role of defect engineering on solar energy conversion is developed, extending light absorption, promoting charge separation, and facilitating stable PC reaction. The achievement of the defective photocatalysts is discussed toward versatile applications such as solar water splitting, CO2 reduction, nitrogen fixation, molecular activation, pollutants degradation, and solar cells. Finally, this Review, with regards to defect engineering, ends with the future opportunities and challenges for this exciting and emerging area for solar energy conversion.

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Architecture of high efficient zinc vacancy mediated Z-scheme photocatalyst from metal-organic frameworks

Cited by 192 publications

References 57 publications

Unraveling Photoexcited Charge Transfer Pathway and Process of CdS/Graphene Nanoribbon Composites toward Visible‐Light Photocatalytic Hydrogen Evolution

Unraveling Photoexcited Charge Transfer Pathway and Process of CdS/Graphene Nanoribbon Composites toward Visible‐Light Photocatalytic Hydrogen Evolution

Smart Assembly of Sulfide Heterojunction Photocatalysts with Well‐Defined Interfaces for Direct Z‐Scheme Water Splitting under Visible Light

Defect Engineering of Photocatalysts for Solar Energy Conversion

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