Conductive polymer supported and confined iron phosphide nanocrystals for boosting the photocatalytic hydrogen production of graphitic carbon nitride

Li, Tao; Wang, Kai; Fang, Qi-Tao; Wang, Bo; Li, Rui; Lin, Ye-Zhan; Liu, Kecheng; Xie, Hongmei; Li, Kui

doi:10.1039/d0tc03348k

Cited by 28 publications

(20 citation statements)

References 57 publications

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“…Higher photocatalytic efficiency can be achieved for Nb 6 /PPy-RGO composites by the modification with PPy and RGO. It has been reported that conductive polymers can be used as photocatalysts for H 2 production from water splitting [65]. However, in such Nb 6 /PPy-RGO-0.25 composites, pure PPy and RGO cannot exhibit photocatalytic activity due to their combination of electrons and holes.…”

Section: Proposed Photocatalytic Mechanismmentioning

confidence: 99%

Enhanced Photocatalytic Hydrogen Production of the Polyoxoniobate Modified with RGO and PPy

Heng

et al. 2020

Nanomaterials

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The development of high-efficiency, recyclable, and inexpensive photocatalysts for water splitting for hydrogen production is of great significance to the application of solar energy. Herein, a series of graphene-decorated polyoxoniobate photocatalysts Nb6/PPy-RGO (Nb6 = K7HNb6O19, RGO = reduced graphene oxide, PPy = polypyrrole), with the bridging effect of polypyrrole were prepared through a simple one-step solvothermal method, which is the first example of polyoxoniobate-graphene-based nanocomposites. The as-fabricated photocatalyst showed a photocatalytic H2 evolution activity without any co-catalyst. The rate of 1038 µmol g−1 in 5 h under optimal condition is almost 43 times higher than that of pure K7HNb6O19·13H2O. The influencing factors for photocatalysts in photocatalytic hydrogen production under simulated sunlight were studied in detail and the feasible mechanism is presented in this paper. These results demonstrate that Nb6O19 acts as the main catalyst and electron donor, RGO provides active sites, and PPy acted as an electronic bridge to extend the lifetime of photo-generated carriers, which are crucial factors for photocatalytic H2 production.

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Section: Proposed Photocatalytic Mechanismmentioning

confidence: 99%

Enhanced Photocatalytic Hydrogen Production of the Polyoxoniobate Modified with RGO and PPy

Heng

et al. 2020

Nanomaterials

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“…[ 20–26 ] In particular, applying the perovskite materials for LEDs have become a research focus. [ 27,28 ] The NCs of CsPbX 3 (X = Cl, Br, and I) can emit narrow and strong spectra from exciton. [ 18,24 ] Lead‐free double perovskite material Cs 2 AgInCl 6 :Bi can emit warm white light with one broadband emission peak from STE, its spectrum in the blue region is insufficient.…”

Section: Introductionmentioning

confidence: 99%

Rare‐Earth‐Based Perovskite Cs₂AgScCl₆:Bi for Strong Full Visible Spectrum Emission

Zeng

Sun

Zhang

et al. 2022

Adv Funct Materials

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Most luminescent materials can only emit light with a particular wavelength. In general, various phosphors with complementary spectral ranges are mixed to realize full-spectrum lighting. Therefore, the integration of luminescence at different wavebands in the single component matrix to obtain white emission is the optimal strategy for designing lighting materials. Thus, Sc-based double perovskite Cs 2 AgScCl 6 :xBi with adjustable free exciton and self-trapped exciton luminescence is synthesized by the vacuum evaporation assisted synthetic method. This perovskite can be used as white phosphor to assemble a high-quality white lighting device. Density functional theory calculations have revealed that the introduction of Bi optimizes the electron transfer and suppresses the defects in Cs 2 AgScCl 6 , which leads to excellent luminescent performance in a broad wavelength range. This work provides a new concept and strategy for the design and preparation of rare-earth optical perovskites in the future.

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“…[ 35 ] The A 2 BX 6 ‐type phosphor components and single‐phase white phosphors have been used to construct white LEDs. [ 35–40 ] However, the resultant white LEDs, particularly the all‐A 2 BX 6 white LEDs, exhibit insufficient color rendering due to the shortage of red light. [ 41 ] Therefore, to attain high‐color‐rendering all‐A 2 BX 6 white LEDs, it is an urgent need to develop red‐emitting phosphors in the family of A 2 BX 6 perovskite variants.…”

Section: Introductionmentioning

confidence: 99%

Red‐Emitting Perovskite Variant Cs₂PtCl₆ Phosphor: Material Design, Luminous Mechanism, and Application in High‐Color‐Rendering White Light‐Emitting Diodes

Liu

et al. 2022

Advanced Optical Materials

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Recently, A2BX6‐type halide perovskite variant phosphors have been applied for white light‐emitting diodes (LEDs) due to their superior photoluminescence properties, excellent stability, and low‐cost solution‐processability. However, the reported white LEDs, particularly the all‐A2BX6 white LEDs, exhibit insufficient color rendering due to the shortage of red light. In this work, through a rational material design, a red‐emitting perovskite variant Cs2PtCl6 phosphor is developed. The synthesized Cs2PtCl6 powders exhibit a relatively narrow bandgap of 2.91 eV and an intrinsic broadband red emission centered at 670 nm, which is attributed to the triplet self‐trapped excitons associated with the Jahn−Teller‐distorted [PtCl6]2− octahedra in the excited state. Using Cs2PtCl6 as the red phosphor component, an all‐A2BX6 white LED is constructed, achieving a standard white light with a Commission Internationale de l'Eclairage chromaticity coordinate of (0.33, 0.33), a correlated color temperature of 5318 K, and a record high color rendering index of 90. This work represents a significant step toward the application of A2BX6 perovskite variant phosphors for solid‐state lighting.

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Conductive polymer supported and confined iron phosphide nanocrystals for boosting the photocatalytic hydrogen production of graphitic carbon nitride

Abstract: Development of earth abundant cocatalyst with confined size on suitable conductive support was of high importance for facilitating the activity of solar energy conversion using semiconductors. In this work, a...

Cited by 28 publications

References 57 publications

Enhanced Photocatalytic Hydrogen Production of the Polyoxoniobate Modified with RGO and PPy

Enhanced Photocatalytic Hydrogen Production of the Polyoxoniobate Modified with RGO and PPy

Rare‐Earth‐Based Perovskite Cs₂AgScCl₆:Bi for Strong Full Visible Spectrum Emission

Red‐Emitting Perovskite Variant Cs₂PtCl₆ Phosphor: Material Design, Luminous Mechanism, and Application in High‐Color‐Rendering White Light‐Emitting Diodes

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Conductive polymer supported and confined iron phosphide nanocrystals for boosting the photocatalytic hydrogen production of graphitic carbon nitride

Abstract: Development of earth abundant cocatalyst with confined size on suitable conductive support was of high importance for facilitating the activity of solar energy conversion using semiconductors. In this work, a...

Cited by 28 publications

References 57 publications

Enhanced Photocatalytic Hydrogen Production of the Polyoxoniobate Modified with RGO and PPy

Enhanced Photocatalytic Hydrogen Production of the Polyoxoniobate Modified with RGO and PPy

Rare‐Earth‐Based Perovskite Cs2AgScCl6:Bi for Strong Full Visible Spectrum Emission

Red‐Emitting Perovskite Variant Cs2PtCl6 Phosphor: Material Design, Luminous Mechanism, and Application in High‐Color‐Rendering White Light‐Emitting Diodes

Contact Info

Product

Resources

About

Rare‐Earth‐Based Perovskite Cs₂AgScCl₆:Bi for Strong Full Visible Spectrum Emission

Red‐Emitting Perovskite Variant Cs₂PtCl₆ Phosphor: Material Design, Luminous Mechanism, and Application in High‐Color‐Rendering White Light‐Emitting Diodes