Achieving cadmium selenide-decorated zinc ferrite@titanium dioxide hollow core/shell nanospheres with improved light trapping and charge generation for photocatalytic hydrogen generation

AbstractCdSe/CdS core-shell nanocrystals with controlled CdS shell thickness and CdSe core size were synthesized for several different values of these two parameters. The particles in aqueous dispersion were in situ decorated with Ni nanoparticles and evaluated for photocatalytic hydrogen generation capacity. The highest H

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Cover Feature: Hydrothermal Crystallization of Nano-Titanium Dioxide for Enhanced Photocatalytic Hydrogen Generation (ChemPhotoChem 9/2018)

ChemPhotoChem ◽

10.1002/cptc.201800176 ◽

2018 ◽

Vol 2 (9) ◽

pp. 775-775

Author(s):

Simanta Kundu ◽

Vivek Polshettiwar

Keyword(s):

Titanium Dioxide ◽

Hydrogen Generation ◽

Hydrothermal Crystallization ◽

Photocatalytic Hydrogen Generation ◽

Nano Titanium Dioxide

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Enhanced Photocatalytic Hydrogen Generation by Optimized Plasmonic Hot Electron Injection in Structure-Adjustable Au-ZnO Hybrids

Catalysts ◽

10.3390/catal10040376 ◽

2020 ◽

Vol 10 (4) ◽

pp. 376

Author(s):

Youlong Chen ◽

Liang Ma ◽

Sijing Ding

Keyword(s):

Photocatalytic Activity ◽

Transient Absorption ◽

Hydrogen Generation ◽

Electron Injection ◽

Resonance Excitation ◽

Core Shell ◽

Hot Electron ◽

Photocatalytic Hydrogen Generation ◽

Hot Electron Injection ◽

Apparent Quantum Efficiency

Plasmonic Au-ZnO hybrids with adjustable structures (including Au-decorated ZnO and core–shell Au@ZnO with dense and porous ZnO shells) and the optimized hot electron-driven photocatalytic activity were successfully prepared. It was found that the Au@ZnO core–shell hybrids with porous morphology had the highest plasmon-enhanced photocatalytic hydrogen generation activity under visible light irradiation. The wavelength-dependent photocatalytic tests verified that Au@ZnO with porous ZnO shells had the highest apparent quantum efficiency upon resonance excitation. The ultrafast transient absorption measurements revealed that Au@ZnO with porous ZnO shells had the fastest plasmon-induced hot electron injection, which was thought to be the reason for the improved photocatalytic activity. This work might provide a promising route to designing photocatalytic and photoelectric materials.

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Photocatalytic hydrogen generation from water under visible light using core/shell nano-catalysts

Water Science & Technology ◽

10.2166/wst.2010.147 ◽

2010 ◽

Vol 61 (9) ◽

pp. 2303-2308 ◽

Cited By ~ 13

Author(s):

X. Wang ◽

K. Shih ◽

X. Y. Li

Keyword(s):

Hydrogen Production ◽

Visible Light ◽

Production Rate ◽

Hydrogen Generation ◽

Nano Particles ◽

Catalyst Loading ◽

Core Shell ◽

Hydrogen Production Rate ◽

Photocatalytic Hydrogen Generation ◽

Nano Catalysts

A microemulsion technique was employed to synthesize nano-sized photocatalysts with a core (CdS)/shell (ZnS) structure. The primary particles of the photocatalysts were around 10 nm, and the mean size of the catalyst clusters in water was about 100 nm. The band gaps of the catalysts ranged from 2.25 to 2.46 eV. The experiments of photocatalytic H2 generation showed that the catalysts (CdS)x/(ZnS)1−x with x ranging from 0.1 to 1 were able to produce hydrogen from water photolysis under visible light. The catalyst with x = 0.9 had the highest rate of hydrogen production. The catalyst loading density also influenced the photo-hydrogen production rate, and the best catalyst concentration in water was 1 g L−1. The stability of the nano-catalysts in terms of size, morphology and activity was satisfactory during an extended test period for a specific hydrogen production rate of 2.38 mmol g−1 L−1 h−1 and a quantum yield of 16.1% under visible light (165 W Xe lamp, λ > 420 nm). The results demonstrate that the (CdS)/(ZnS) core/shell nano-particles are a novel photo-catalyst for renewable hydrogen generation from water under visible light. This is attributable to the large band-gap ZnS shell that separates the electron/hole pairs generated by the CdS core and hence reduces their recombinations.

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High-density platinum nanoparticle-decorated titanium dioxide nanofiber networks for efficient capillary photocatalytic hydrogen generation

Journal of Materials Chemistry A ◽

10.1039/c6ta04846c ◽

2016 ◽

Vol 4 (30) ◽

pp. 11672-11679 ◽

Cited By ~ 14

Author(s):

Zhaodong Li ◽

Chunhua Yao ◽

Yi-Cheng Wang ◽

Solomon Mikael ◽

Sundaram Gunasekaran ◽

...

Keyword(s):

Titanium Dioxide ◽

Reaction Kinetics ◽

Hydrogen Generation ◽

High Density ◽

Platinum Nanoparticle ◽

Photocatalytic Hydrogen Generation ◽

Photocatalytic System

A 3D nanofibrous Pt–TiO2 capillary photocatalytic system is developed to perform photocatalytic H2 production outside of the electrolyte body. Enhanced reaction kinetics and a higher yield of H2 are obtained in the capillary setup compared to the conventional in-electrolyte setup.

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