Hierarchically 1D CdS decorated on 2D perovskite-type La2Ti2O7 nanosheet hybrids with enhanced photocatalytic performance

Mao, Liang; Cai, Xiaoyan; Zhu, Mingshan

doi:10.1007/s12598-020-01589-w

Cited by 75 publications

(18 citation statements)

References 32 publications

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“…In contrast, g-C 3 N 4 -4AAP 15 presents redshift emission peaks with a much lower PL intensity, in which the dramatical PL quenching phenomenon first excludes the defects effect based on almost the same EPR spectra as pure g-C 3 N 4 (Figure S2). Thus, it certificates that the charge carriers separate efficiently owing to grafting diazole on the skeleton edge of g-C 3 N 4 . The above results are reflected directly from the photos of pure g-C 3 N 4 and g-C 3 N 4 -4AAP 15 powders or suspension in water under UV light.…”

Section: Resultsmentioning

confidence: 74%

“…Thus, it certificates that the charge carriers separate efficiently owing to grafting diazole on the skeleton edge of g-C 3 N 4 . 47 The above results are reflected directly from the photos of pure g-C 3 N 4 and g-C 3 N 4 -4AAP 15 powders or suspension in water under UV light. The intramolecular charge transfer/recombination processes are further inspected by the TR-PL decay property.…”

Section: Resultsmentioning

confidence: 91%

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Limbic Inducted and Delocalized Effects of Diazole in Carbon Nitride Skeleton for Propelling Photocatalytic Hydrogen Evolution

Dong

Zuo

Xiao

et al. 2021

ACS Appl. Mater. Interfaces

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Skeleton modification on carbon nitride (g-C3N4) via organic molecules is a recognized effective strategy to improve photocatalytic performance because it can powerfully improve charge separation in the skeleton plane. Herein, a diazole with a unique conjugated structure is bonded on edge of the g-C3N4 skeleton through a moderate polymerization of urea with 4-aminoantipyrine (4AAP). Meanwhile, the Pt nanoparticles selectively deposit on edge of the g-C3N4-4AAP15 nanosheet. It reveals that the robust limbic inducted and delocalized effects of diazole not only facilitate photogenerated electrons aggregation toward skeleton edge to promote in-plane carrier separation but also effectively stabilize and delocalize photogenerated electrons to improve carrier lifetime for propelling the photocatalytic hydrogen evolution (PHE) reaction. Specifically, the PHE rate over optimal g-C3N4-4AAP15 (284.2 μmol h–1) is 10 times that of pure g-C3N4 (27.6 μmol h–1) and the apparent quantum efficiency (AQE) at 420 nm reaches up to 24.2%. Through insights into the functionalized effect of small nitrogenous heterocycles introduced into the skeleton edge of g-C3N4, this work opens a new design thought for exploiting high-efficiency g-C3N4-based photocatalysts for photocatalytic application.

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Section: Resultsmentioning

confidence: 74%

Section: Resultsmentioning

confidence: 91%

Limbic Inducted and Delocalized Effects of Diazole in Carbon Nitride Skeleton for Propelling Photocatalytic Hydrogen Evolution

Dong

Zuo

Xiao

et al. 2021

ACS Appl. Mater. Interfaces

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“…This indicates that the photoinduced electron-hole pairs can be efficiently separated under solar illumination. Furthermore, electrochemical impedance spectroscopy plots were also recorded to observe the photoinduced charge transfer kinetics on the interface of different photocatalysts [35][36][37][38][39][40][41][42]. Obviously, the small semicircle of the Cu 2 S/ CdS heterostructure in comparison with the pristine Cu 2 S and CdS is observed in Fig.…”

Section: Photocatalytic Activity and Mechanism Analysismentioning

confidence: 99%

Simultaneously Efficient Solar Light Harvesting and Charge Transfer of Hollow Octahedral Cu2S/CdS p–n Heterostructures for Remarkable Photocatalytic Hydrogen Generation

Zhang

Ran

et al. 2021

Trans. Tianjin Univ.

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Solar-driven water splitting is a promising alternative to industrial hydrogen production. This study reports an elaborate design and synthesis of the integration of cadmium sulfide (CdS) quantum dots and cuprous sulfide (Cu2S) nanosheets as three-dimensional (3D) hollow octahedral Cu2S/CdS p–n heterostructured architectures by a versatile template and one-pot sulfidation strategy. 3D hierarchical hollow nanostructures can strengthen multiple reflections of solar light and provide a large specific surface area and abundant reaction sites for photocatalytic water splitting. Owing to the construction of the p–n heterostructure as an ideal catalytic model with highly matched band alignment at Cu2S/CdS interfaces, the emerging internal electric field can facilitate the space separation and transfer of photoexcited charges between CdS and Cu2S and also enhance charge dynamics and prolong charge lifetimes. Notably, the unique hollow Cu2S/CdS architectures deliver a largely enhanced visible-light-driven hydrogen generation rate of 4.76 mmol/(g·h), which is nearly 8.5 and 476 times larger than that of pristine CdS and Cu2S catalysts, respectively. This work not only paves the way for the rational design and fabrication of hollow photocatalysts but also clarifies the crucial role of unique heterostructure in photocatalysis for solar energy conversion.

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“…Nevertheless, more interfacial imperfections (such as structural defects, voids, pores, and cracks) and particle agglomeration are also introduced, resulting in increased dielectric loss and decreased E b . It is well known that large-aspect-ratio one dimensional (1D) and two dimensional (2D) fillers could lead to a higher ε r of composites at a lower filler content in comparison with that of the zero dimensional (0D) fillers [10][11][12][13]. Yet, the large difference in ε r between ceramic fillers and polymer matrix result in electric field distortion at the interface and decreased E b .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Energy Storage Performance of PVDF-Based Composites Using BN@PDA Sheets and Titania Nanosheets

et al. 2022

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With the rapid development of modern electrical and electronic applications, the demand for high-performance film capacitors is becoming increasingly urgent. The energy density of a capacitor is dependent on permittivity and breakdown strength. However, the development of polymer-based composites with both high permittivity (εr) and breakdown strength (Eb) remains a huge challenge. In this work, a strategy of doping synergistic dual-fillers with complementary functionalities into polymer is demonstrated, by which high εr and Eb are obtained simultaneously. Small-sized titania nanosheets (STNSs) with high εr and high-insulating boron nitride sheets coated with polydopamine on the surface (BN@PDA) were introduced into poly(vinylidene fluoride) (PVDF) to prepare a ternary composite. Remarkably, a PVDF-based composite with 1 wt% BN@PDA and 0.5 wt% STNSs (1 wt% PVDF/BN@PDA−STNSs) shows an excellent energy storage performance, including a high εr of ~13.9 at 1 Hz, a superior Eb of ~440 kV/mm, and a high discharged energy density Ue of ~12.1 J/cm3. Moreover, the simulation results confirm that BN@PDA sheets improve breakdown strength and STNSs boost polarization, which is consistent with the experimental results. This contribution provides a new design paradigm for energy storage dielectrics.

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Hierarchically 1D CdS decorated on 2D perovskite-type La2Ti2O7 nanosheet hybrids with enhanced photocatalytic performance

Cited by 75 publications

References 32 publications

Limbic Inducted and Delocalized Effects of Diazole in Carbon Nitride Skeleton for Propelling Photocatalytic Hydrogen Evolution

Limbic Inducted and Delocalized Effects of Diazole in Carbon Nitride Skeleton for Propelling Photocatalytic Hydrogen Evolution

Simultaneously Efficient Solar Light Harvesting and Charge Transfer of Hollow Octahedral Cu2S/CdS p–n Heterostructures for Remarkable Photocatalytic Hydrogen Generation

Enhanced Energy Storage Performance of PVDF-Based Composites Using BN@PDA Sheets and Titania Nanosheets

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