Photocatalytic hydrogen generation using mesoporous silicon nanoparticles: influence of magnesiothermic reduction conditions and nanoparticle aging on the catalytic activity

Nanoscale ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 2685-2692
Author(s):  
Isabel S. Curtis ◽  
Ryan J. Wills ◽  
Mita Dasog
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Silicon Nanoparticles ◽  
Hydrogen Generation ◽  
Oxide Content ◽  
Magnesiothermic Reduction ◽  
Mesoporous Silicon ◽  
High Crystallinity ◽  
Photocatalytic Hydrogen Generation

High crystallinity, low oxide content, and low sintering lead to optimally performing mesoporous Si photocatalysts for solar-driven hydrogen production.

scholarly journals Importance of the structural integrity of a carbon conjugated mediator for photocatalytic hydrogen generation from water over a CdS–carbon nanotube–MoS2 composite

2016 ◽  
Vol 52 (93) ◽  
pp. 13596-13599 ◽  
Author(s):  
Molly Meng-Jung Li ◽  
Poppy Mills ◽  
Simon M. Fairclough ◽  
Alex Robertson ◽  
Yung-Kang Peng ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Nanotube ◽  
Hydrogen Production ◽  
Structural Integrity ◽  
Hydrogen Generation ◽  
Single Layer ◽  
Cds Quantum Dots ◽  
Photocatalytic Hydrogen Production ◽  
Photocatalytic Hydrogen Generation

CdS quantum dots is shown to promote photocatalytic hydrogen production from water significantly over single-layer MoS2 on double-walled carbon nanotube.

Understanding the roles of plasmonic Au nanocrystal size, shape, aspect ratio and loading amount in Au/g-C3N4 hybrid nanostructures for photocatalytic hydrogen generation

2018 ◽  
Vol 20 (34) ◽  
pp. 22296-22307 ◽  
Author(s):  
Yanzhen Guo ◽  
Henglei Jia ◽  
Jianhua Yang ◽  
Hang Yin ◽  
Zhi Yang ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Aspect Ratio ◽  
Carbon Nitride ◽  
Hydrogen Generation ◽  
Hybrid Nanostructures ◽  
Nanocrystal Size ◽  
Gold Nanocrystals ◽  
Photocatalytic Hydrogen Generation ◽  
Loading Amount ◽  
Carbon Nitride Nanosheets

Hybrid photocatalysts made of pre-grown gold nanocrystals and graphitic carbon nitride nanosheets are synthesized, studied and optimized for boosting photocatalytic hydrogen production.

Noble-metal-free NiFe nanoparticles immobilized on nano CeZrO2 solid solutions for highly efficient hydrogen production from hydrous hydrazine

2019 ◽  
Vol 3 (11) ◽  
pp. 3071-3077 ◽  
Author(s):  
Hongtao Zou ◽  
Qilu Yao ◽  
Meiling Huang ◽  
Meihua Zhu ◽  
Fei Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Noble Metal ◽  
Solid Solutions ◽  
Reduction Method ◽  
Hydrogen Generation ◽  
High Catalytic Activity ◽  
Metal Free ◽  
Highly Efficient ◽  
Hydrazine Solution

Noble-metal-free NiFe nanoparticles were successfully immobilized on nano CeZrO2 solid solutions by a simple impregnation–reduction method, exhibiting a high catalytic activity and 100% H2 selectivity for hydrogen generation from hydrazine solution.

Confinement effect of monolayer MoS2 quantum dots on conjugated polyimide and promotion of solar-driven photocatalytic hydrogen generation

2017 ◽  
Vol 46 (12) ◽  
pp. 3877-3886 ◽  
Author(s):  
Chenghai Ma ◽  
Haoyue Zhu ◽  
Jun Zhou ◽  
Zhiwei Cui ◽  
Teng Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Hydrogen Production ◽  
Quantum Dot ◽  
Hydrogen Generation ◽  
Confinement Effect ◽  
Solar Light ◽  
Monolayer Mos2 ◽  
Photocatalytic Hydrogen Generation

Monolayer MoS2 quantum dot (MQD) confined polyimide demonstrates 360% enhancement in hydrogen production compared to Pt/PI under solar light.

TPPH/g-C3N4 Nanohybrids Constructed with Surfactant-Assisted Co-assembly for Photocatalytic Hydrogen Generation

NANO ◽  
2021 ◽  
Author(s):  
Ye Shang ◽  
Manfei Lv ◽  
Songtian Li
Keyword(s):  
Hydrogen Production ◽  
Photoelectron Spectroscopy ◽  
Hydrogen Generation ◽  
Separation Efficiency ◽  
Electrochemical Impedance ◽  
Production Capacity ◽  
Noncovalent Interaction ◽  
Full Spectrum ◽  
X Ray ◽  
Photocatalytic Hydrogen Generation

A new type of pure organic 5,10,15,20-tetra (4-hydroxyphenyl) porphyrin (TPPH)/[Formula: see text]-C3N4 nanohybrid was prepared to expand the light absorption range of graphitic carbon nitride materials. The morphology and structure of the composites were systematically characterized by scanning electron microscope, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. Results show that after the introduction of TPPH, the visible light area optical absorption of the composite sample increased significantly under the noncovalent interaction of TPPH and [Formula: see text]-C3N4, and the electrochemical impedance spectroscopy and [Formula: see text]–[Formula: see text] measurements confirmed the improved charge separation efficiency of the sample and showed excellent photocatalytic hydrogen production capacity. Under full spectrum irradiation, the hydrogen production of 1.67% TPPH/[Formula: see text]-C3N4 without adding co-catalyst reached 10.87[Formula: see text]mmol[Formula: see text][Formula: see text], about 2.68 times that of pure [Formula: see text]-C3N4 (4.06[Formula: see text]mmol[Formula: see text][Formula: see text]), which showed effective promotion of the electron transfer between TPPH and [Formula: see text]-C3N4.

Enhanced visible-light photocatalytic hydrogen production activity of three-dimensional mesoporous p-CuS/n-CdS nanocrystal assemblies

2017 ◽  
Vol 4 (3) ◽  
pp. 433-441 ◽  
Author(s):  
Ioannis Vamvasakis ◽  
Adelais Trapali ◽  
Jianwei Miao ◽  
Bin Liu ◽  
Gerasimos S. Armatas
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
High Performance ◽  
Hydrogen Generation ◽  
High Surface ◽  
Three Dimensional ◽  
Surface Areas ◽  
Photocatalytic Hydrogen Generation ◽  
Production Activity ◽  
Visible Light Photocatalytic

Mesoporous assemblies of p-CuS/n-CdS nanocrystal junctions with high surface areas and uniform pores demonstrate a high performance and stability in photocatalytic hydrogen generation from water using visible light.

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

2010 ◽  
Vol 61 (9) ◽  
pp. 2303-2308 ◽  
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.

Monodisperse platinum nanoparticles supported on highly ordered mesoporous silicon nitride nanoblocks: superior catalytic activity for hydrogen generation from sodium borohydride

RSC Advances ◽  
2015 ◽  
Vol 5 (72) ◽  
pp. 58943-58951 ◽  
Author(s):  
Chrystelle Salameh ◽  
Alina Bruma ◽  
Sylvie Malo ◽  
Umit B. Demirci ◽  
Philippe Miele ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Silicon Nitride ◽  
Sodium Borohydride ◽  
Platinum Nanoparticles ◽  
Hydrogen Generation ◽  
Synthesis And Characterization ◽  
Mesoporous Silicon ◽  
Ordered Mesoporous ◽  
Hydrolysis Of

Synthesis and characterization of ordered mesoporous silicon nitride nanoblocks as efficient supports of platinum nanoparticles for the hydrolysis of sodium borohydride.

Microwave-Assisted Synthesis of Ni/CNTs Nanocomposites for Hydrogen Production from Hydrolysis of NaBH4

2012 ◽  
Vol 622-623 ◽  
pp. 816-820
Author(s):  
Fang Li ◽  
Qi Ming Li ◽  
Hern Kim
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Hydrogen Generation ◽  
Generation Rate ◽  
Ni Catalyst ◽  
Microwave Assisted Synthesis ◽  
Environment Friendly ◽  
Microwave Assisted ◽  
Hydrolysis Of ◽  
Supported Ni

Hydrogen production from NaBH4 hydrolysis is very important for environment-friendly fuel cells. Here Ni/CNTs nanocomposites were prepared by microwave-assisted method and used as the catalyst for catalytic hydrolysis of NaBH4. XRD and SEM characterization showed that uniform Ni/CNTs nanocomposites can be obtained through microwave heating and solvent optimization. Ni/CNTs nanocomposites exhibit excellent catalytic activity in the hydrolysis of NaBH4, i.e., the average hydrogen generation rate at 25°C is 840ml.min-1.g-1 for the CNTs-supported Ni/CNTs, while the hydrogen generation rate of 86ml.min-1.g-1 for unsupported Ni catalyst. Compared with the unsupported Ni catalyst, Ni/CNTs nanocomposites presented higher catalytic activity for hydrolysis of aqueous NaBH4 solution.

scholarly journals Plasmonic Ag decorated CdMoO4 as an efficient photocatalyst for solar hydrogen production

RSC Advances ◽  
2019 ◽  
Vol 9 (49) ◽  
pp. 28525-28533 ◽  
Author(s):  
Yogesh A. Sethi ◽  
Aniruddha K. Kulkarni ◽  
Supriya K. Khore ◽  
Rajendra P. Panmand ◽  
Sandip C. Kanade ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Hydrothermal Method ◽  
Hydrogen Generation ◽  
Plasmonic Enhancement ◽  
Solar Hydrogen ◽  
Photocatalytic Hydrogen Generation ◽  
Solar Hydrogen Production

Plasmonic enhancement of photocatalytic hydrogen generation is demonstrated using hierarchical Ag decorated CdMoO4 synthesized using a hydrothermal method.

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