Flexoelectricity-induced enhancement in carrier separation and photocatalytic activity of a photocatalyst

Cheng, Tingting; Gao, Huajing; Li, Ruishan; Wang, Shifa; Yi, Zao; Yang, Hua

doi:10.1016/j.apsusc.2021.150669

Cited by 110 publications

(31 citation statements)

References 67 publications

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“…By comparison, we selected the optimal parameters 120 nm. In conclusion, whether it is the period of the structure, the width of the grating or the thickness of the semiconductor GaAs layer, the change of these parameters directly affects the surface plasmon resonance characteristics of the entire structure, or make it strengthen, or make it weaken, which in turn leads to a corresponding change in the absorption of the proposed absorber and the bandwidth of the spectrum (Chen et al, 2013;Liu et al, 2020;An et al, 2021;Cheng T. et al, 2021). The width of the top grating will not only affect the surface plasmon resonance, but also the change of its geometric parameters will have a certain effect on the cavity film of the structure, which will not be described in detail here.…”

Section: Resultsmentioning

confidence: 99%

Design and Photoelectric Performance of Perfect Solar Absorber Based on GaAs Grating

Liu

et al. 2022

Front. Mater.

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In recent years, solar energy has received extensive attention as a clean and renewable energy. We present a perfect broadband solar absorber based on tungsten and semiconductor GaAs in this paper. The structure of GaAs grating-GaAs film-W substrate has been proposed. And the finite time domain difference method (FDTD) has been used for the numerical simulation of the model. Broadband absorption has been realized in the 500–1,850 nm, by adjusting the parameters of geometry to excite high-efficiency surface plasmon resonance. The absorption spectrum of the structure can be changed by adjusting the geometric parameters to meet different needs. The proposed absorber has incidence insensitive (0–60°) and high short-circuit current characteristics. The structure is simple and easy to manufacture, and has superior photoelectric properties to be application in photothermal conversion, collection and utilization of solar energy.

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Section: Resultsmentioning

confidence: 99%

Design and Photoelectric Performance of Perfect Solar Absorber Based on GaAs Grating

Liu

et al. 2022

Front. Mater.

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Section: Resultsmentioning

confidence: 99%

“…One clear peak at 783.7 eV in Figure c can be deconvoluted into four peaks for Co 2+ 2p3/2 (780.1 and 786.6 eV), Co 3+ 2p3/2 (783.1 eV), and Co 2+ 2p1/2 (794.1 eV) . The high-resolution spectrum of O 1s is shown in Figure d; the peaks located at around 529.3, 530.7, and 532.1 eV were associated with the lattice oxygen atoms, chemically adsorbed oxygen, and physically adsorbed oxygen, respectively …”

Section: Resultsmentioning

confidence: 99%

“…44 The high-resolution spectrum of O 1s is shown in Figure 3d; the peaks located at around 529.3, 530.7, and 532.1 eV were associated with the lattice oxygen atoms, chemically adsorbed oxygen, and physically adsorbed oxygen, respectively. 45 The optical absorption property of the samples was characterized by UV−Vis absorption spectroscopy in the range of 250−750 nm. Figure S5 and Figure 5 show the optical absorption property.…”

Section: Resultsmentioning

confidence: 99%

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Fabrication and Characterization of Co-Doped Fe₂O₃ Spindles for the Enhanced Photo-Fenton Catalytic Degradation of Tetracycline

Wang

Zhang

et al. 2021

ACS Omega

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Co-doped Fe 2 O 3 spindles with different Co contents were successfully fabricated by a facile one-step hydrothermal method. The crystalline structure, morphology, optical properties, and chemical state of the as-prepared catalysts before and after photo-Fenton reaction were characterized. Co 2+ incorporated into the Fe 2 O 3 lattice was confirmed by the above characterizations. Also, the photocatalytic and photo-Fenton catalytic performances of the samples were evaluated by the degradation of tetracycline (TC) under visible light irradiation in the absence/presence of H 2 O 2 . The results demonstrated that Co-doped Fe 2 O 3 spindles exhibited better catalytic degradation performance in comparison with single Fe 2 O 3 spindles, and the sample of Co(5%)-Fe 2 O 3 spindles displayed the highest activity and best stability. The improvement of photo-Fenton activity might be attributed to two reasons: On the one hand, Co-doped Fe 2 O 3 spindles not only formed the Fe vacancies to reduce the band gap but also could build up an internal electric field, which inhibits electron/hole pair recombination and facilitates the transfer of photoexcited charge carriers. On the other hand, the intrinsic Co 2+ /Co 3+ redox cycling can accelerate the circulation between Fe 2+ and Fe 3+ in Co(5%)-Fe 2 O 3 spindles to facilitate H 2 O 2 consumption and produce more ·OH radicals for TC degradation.

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“…It can generate a large number of carriers under the action of light and can be applied in the field of solar energy [8]. Compared with other semiconductor materials, ZnO has the following basic advantages: (1) ZnO has high electron mobility, can quickly transfer the generated photoelectrons, and effectively form photocurrent; (2) it has a natural substrate and can be closely combined with the material deposited on it; (3) wet chemical treatment (the method of liquid phase and preparation by chemical reaction of the chemical reaction is collectively referred to the as wet chemical method, such as chemical liquid phase deposition (CBD), electrochemical deposition (electroplating), solvent gel, etc.,) can be applied to various treatment methods [9]; (4) it has strong resistance to radiation damage and can maintain good performance in extreme environments. The commonly used ZnO crystal preparation methods are the sol-gel method, solution evaporation decomposition method (EDS), wet synthesis, and gas-phase reaction [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Preparation of ZnO/Bi2O3 Composites as Heterogeneous Thin Film Materials with High Photoelectric Performance on FTO Base

et al. 2021

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In recent years, ZnO nanomaterials have achieved great performance in solar energy applications. How to synthesize a ZnO nanocomposite structure with high photoelectric conversion efficiency has become an urgent problem to solved. In this paper, a narrow band gap bismuth trioxide (Bi2O3) coated on a ZnO nanoarray by magnetron sputtering was used to prepare a composite heterojunction ZnO/Bi2O3. Studies have found that ZnO/Bi2O3 exhibits excellent photoelectric conversion performance. By preparing a composite heterostructure of ZnO/Bi2O3, it can effectively compensate for the insufficient absorption of ZnO in the visible light range and inhibit the recombination of carriers within the material. The influence of Bi2O3 thickness on the microstructure and electronic structure of the ZnO/Bi2O3 composite structure was explored and analyzed. The energy gap width of the composite heterostructure decreases with the increase in the Bi2O3 thickness on the surface of the ZnO nanorod array. At the same time, the conductive glass composite film structure is simple to prepare and is very environmentally friendly. The ZnO/Bi2O3 composite heterogeneous material prepared this time is suitable for solar cells, photodetectors, photocatalysis and other fields.

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Flexoelectricity-induced enhancement in carrier separation and photocatalytic activity of a photocatalyst

Cited by 110 publications

References 67 publications

Design and Photoelectric Performance of Perfect Solar Absorber Based on GaAs Grating

Design and Photoelectric Performance of Perfect Solar Absorber Based on GaAs Grating

Fabrication and Characterization of Co-Doped Fe₂O₃ Spindles for the Enhanced Photo-Fenton Catalytic Degradation of Tetracycline

Preparation of ZnO/Bi2O3 Composites as Heterogeneous Thin Film Materials with High Photoelectric Performance on FTO Base

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Flexoelectricity-induced enhancement in carrier separation and photocatalytic activity of a photocatalyst

Cited by 110 publications

References 67 publications

Design and Photoelectric Performance of Perfect Solar Absorber Based on GaAs Grating

Design and Photoelectric Performance of Perfect Solar Absorber Based on GaAs Grating

Fabrication and Characterization of Co-Doped Fe2O3 Spindles for the Enhanced Photo-Fenton Catalytic Degradation of Tetracycline

Preparation of ZnO/Bi2O3 Composites as Heterogeneous Thin Film Materials with High Photoelectric Performance on FTO Base

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Fabrication and Characterization of Co-Doped Fe₂O₃ Spindles for the Enhanced Photo-Fenton Catalytic Degradation of Tetracycline