Enhancement of hydrogen production using photoactive nanoparticles on a photochemically inert photonic macroporous support

Mitchell, Robert W.; Brydson, Rik; Douthwaite, Richard E.

doi:10.1039/c4cp04333b

Cited by 19 publications

(16 citation statements)

References 35 publications

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“…[64] Typically 70 mg of photocatalyst was used except where stated otherwise (Table 2). Reactions were performed in a solution of water and triethanolamine in 9:1 vol % (50 mL) and the apparatus maintained at a temperature of 40 o C. Illumination was performed using a 300 W Xe lamp fitted with a 15 cm IR filter and a wideband AlMgF2 coated mirror followed by a 40 nm long band pass filter.…”

Section: Photocatalysismentioning

confidence: 99%

Pore confinement effects and stabilization of carbon nitride oligomers in macroporous silica for photocatalytic hydrogen production

Qiao

Mitchell

Coulson

et al. 2016

Carbon

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An ordered macroporous host (mac-SiO2) has been used to prevent aggregation of layered photocatalysts based on carbon nitride. Using typical carbon nitride synthesis conditions, cyanamide was condensed at 550 o C in the presence and absence of mac-SiO2. Condensation in the absence of mac-SiO2 results in materials with structural characteristics consistent with the carbon nitride, melon, accompanied by ca. 2 wt% carbonization. For mac-SiO2 supported materials, condensation occurs with greater carbonization (ca. 6 wt%). On addition of 3wt% Pt cocatalyst photocatalytic hydrogen production under visible light is found to be up to 10 times greater for the supported composites. Time-resolved photoluminescence spectroscopy shows that excited state relaxation is more rapid for the mac-SiO2 supported materials suggesting faster electron-hole recombination and that supported carbon nitride does not exhibit improved charge separation. CO2 temperature programmed desorption indicates that enhanced photoactivity of supported carbon nitride is attributable to an increased surface area compared to bulk carbon nitride and an increase in the concentration of weakly basic catalytic sites, consistent with carbon nitride oligomers.

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Section: Photocatalysismentioning

confidence: 99%

Pore confinement effects and stabilization of carbon nitride oligomers in macroporous silica for photocatalytic hydrogen production

Qiao

Mitchell

Coulson

et al. 2016

Carbon

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“…The PC‐FTO films are prepared from monodispersed polystyrene template using a modified literature method . FTO glass was firstly washed by piranha solution before used.…”

Section: Methodsmentioning

confidence: 99%

“…), and the periodicity will lead to the formation of a photonic stop band (PSB). The PSB inhibits the propagation of photons and causes multiple scattering within a particular wavelength region that satisfies the Bragg‐Snell's law . The PSB position of a certain PCs material, as concluded from Bragg‐Snell's law, is reliant on the RI of PCs material, periodicity order, filling factor and incident light angle .…”

Section: Introductionmentioning

confidence: 99%

Improved Utilization of Sunlight Through the Incidence Dependence of the Photonic Stop Band: A g‐C₃N₄‐Embedded Fluorine‐Doped Tin Oxide (FTO) Photonic Crystal Film

2018

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Photonic crystal fluorine‐doped tin oxide (PC‐FTO) films are fabricated on FTO glass to supply an available surface area to embed a photoactive material, and also improve the overall photon–electron conversion efficiency under illumination with light of a specific incident range. The nanoscale g‐C3N4 photocatalyst is synthesized directly inside the PC‐FTO film from a liquid precursor, without the addition of any surface reagent or noble metal particles. The photonic stop band (PSB) of the PC‐FTO is studied by diffuse‐reflectance UV/Vis absorption spectroscopy (DRUVS) under conditions of a different incidence angle of the light. Photoelectrochemistry (PEC) is used to demonstrate the influence of the PSB on the photocatalytic performance of g‐C3N4@PC‐FTO.

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“…where the active material is photoactive, photochemically inactive IO hosts can be used as support material for photocatalytic nanoparticles, as demonstrated by Mitchell et al [90] They synthesized ZrO 2 IO decorated with CdS NPs for photocatalytic hydrogen production from water. The absorption band of the CdS NPs partially overlaps with the blue edge of the photonic ZrO 2 stop band giving rise to a nearly fivefold enhancement in H 2 production compared to CdS deposited on a non-photonic support.…”

Section: Inverse Opals As Photocatalysts and Photoelectrochemical Cellsmentioning

confidence: 99%

2D and 3D photonic crystal materials for photocatalysis and electrochemical energy storage and conversion

Collins

Armstrong

McNulty

et al. 2016

Science and Technology of Advanced Materials

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This perspective reviews recent advances in inverse opal structures, how they have been developed, studied and applied as catalysts, catalyst support materials, as electrode materials for batteries, water splitting applications, solar-to-fuel conversion and electrochromics, and finally as photonic photocatalysts and photoelectrocatalysts. Throughout, we detail some of the salient optical characteristics that underpin recent results and form the basis for light-matter interactions that span electrochemical energy conversion systems as well as photocatalytic systems. Strategies for using 2D as well as 3D structures, ordered macroporous materials such as inverse opals are summarized and recent work on plasmonic–photonic coupling in metal nanoparticle-infiltrated wide band gap inverse opals for enhanced photoelectrochemistry are provided.

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Enhancement of hydrogen production using photoactive nanoparticles on a photochemically inert photonic macroporous support

Abstract: Photoactive nanocrystals incorporated into a photocatalytically inert macroporous photonic host material enhance photohydrogen production on visible light illumination.

Cited by 19 publications

References 35 publications

Pore confinement effects and stabilization of carbon nitride oligomers in macroporous silica for photocatalytic hydrogen production

Pore confinement effects and stabilization of carbon nitride oligomers in macroporous silica for photocatalytic hydrogen production

Improved Utilization of Sunlight Through the Incidence Dependence of the Photonic Stop Band: A g‐C₃N₄‐Embedded Fluorine‐Doped Tin Oxide (FTO) Photonic Crystal Film

2D and 3D photonic crystal materials for photocatalysis and electrochemical energy storage and conversion

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Enhancement of hydrogen production using photoactive nanoparticles on a photochemically inert photonic macroporous support

Abstract: Photoactive nanocrystals incorporated into a photocatalytically inert macroporous photonic host material enhance photohydrogen production on visible light illumination.

Cited by 19 publications

References 35 publications

Pore confinement effects and stabilization of carbon nitride oligomers in macroporous silica for photocatalytic hydrogen production

Pore confinement effects and stabilization of carbon nitride oligomers in macroporous silica for photocatalytic hydrogen production

Improved Utilization of Sunlight Through the Incidence Dependence of the Photonic Stop Band: A g‐C3N4‐Embedded Fluorine‐Doped Tin Oxide (FTO) Photonic Crystal Film

2D and 3D photonic crystal materials for photocatalysis and electrochemical energy storage and conversion

Contact Info

Product

Resources

About

Improved Utilization of Sunlight Through the Incidence Dependence of the Photonic Stop Band: A g‐C₃N₄‐Embedded Fluorine‐Doped Tin Oxide (FTO) Photonic Crystal Film