Active sites provided by surface autocatalytic effect and quantum confinement for stable and efficient photocatalytic hydrogen generation

2021 ◽  
Author(s):  
Ruiming Jia ◽  
Qingfeng Gui ◽  
Lina Sui ◽  
Yan Huang ◽  
Honggang Lu ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Hydrogen Evolution ◽  
Quantum Confinement ◽  
Active Sites ◽  
Hydrogen Generation ◽  
Photocatalytic Hydrogen Evolution ◽  
Photocatalytic Hydrogen Generation ◽  
Renewable Energy Generation ◽  
And Storage ◽  
Autocatalytic Effect

Photocatalytic hydrogen evolution from water is a promising approach for renewable energy generation and storage. However, traditional photocatalysts suffer from limited hydrogen evolution rate due to the lack of active...

scholarly journals Few-layered CuInP2S6 nanosheet with sulfur vacancy boosting photocatalytic hydrogen evolution

CrystEngComm ◽  
2021 ◽  
Author(s):  
Peng Yu ◽  
Fengmei Wang ◽  
Jun Meng ◽  
Tofik Ahmed Shifa ◽  
Marshet Getaye Sendeku ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Generation ◽  
Sulfur Vacancy ◽  
Photocatalytic Hydrogen Evolution ◽  
Photocatalytic Hydrogen Generation

Uniform few-layered CuInP2S6 nanosheets and microsheets were initially synthesized and utilized as photocatalysts towards photocatalytic hydrogen generation.

scholarly journals Rational design of isostructural 2D porphyrin-based covalent organic frameworks for tunable photocatalytic hydrogen evolution

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Rufan Chen ◽  
Yang Wang ◽  
Yuan Ma ◽  
Arindam Mal ◽  
Xiao-Ya Gao ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Rational Design ◽  
Hydrogen Generation ◽  
Structure Design ◽  
Molecular Engineering ◽  
Valuable Insight ◽  
Covalent Organic Frameworks ◽  
Structure Property ◽  
Photocatalytic Hydrogen Evolution ◽  
Photocatalytic Hydrogen Generation

AbstractCovalent organic frameworks have recently gained increasing attention in photocatalytic hydrogen generation from water. However, their structure-property-activity relationship, which should be beneficial for the structural design, is still far-away explored. Herein, we report the designed synthesis of four isostructural porphyrinic two-dimensional covalent organic frameworks (MPor-DETH-COF, M = H2, Co, Ni, Zn) and their photocatalytic activity in hydrogen generation. Our results clearly show that all four covalent organic frameworks adopt AA stacking structures, with high crystallinity and large surface area. Interestingly, the incorporation of different transition metals into the porphyrin rings can rationally tune the photocatalytic hydrogen evolution rate of corresponding covalent organic frameworks, with the order of CoPor-DETH-COF < H2Por-DETH-COF < NiPor-DETH-COF < ZnPor-DETH-COF. Based on the detailed experiments and calculations, this tunable performance can be mainly explained by their tailored charge-carrier dynamics via molecular engineering. This study not only represents a simple and effective way for efficient tuning of the photocatalytic hydrogen evolution activities of covalent organic frameworks at molecular level, but also provides valuable insight on the structure design of covalent organic frameworks for better photocatalysis.

Over two-orders of magnitude enhancement of the photocatalytic hydrogen evolution activity of carbon nitride via mediator-free decoration with gold-organic microspheres

2017 ◽  
Vol 53 (86) ◽  
pp. 11814-11817 ◽  
Author(s):  
Qiaoli Zhang ◽  
Shengyang Yang ◽  
Su-Na Yin ◽  
Huaiguo Xue
Keyword(s):  
Hydrogen Evolution ◽  
Carbon Nitride ◽  
Hydrogen Generation ◽  
Photocatalytic Hydrogen Evolution ◽  
Photocatalytic Hydrogen Generation

A Pt and mediator free route was developed to achieve binary sized AuNPs in g-C3N4for enhanced photocatalytic hydrogen generation.

Mesoporous assembled structures of Cu2O and TiO2nanoparticles for highly efficient photocatalytic hydrogen generation from water

RSC Advances ◽  
2016 ◽  
Vol 6 (60) ◽  
pp. 54848-54855 ◽  
Author(s):  
I. Tamiolakis ◽  
I. T. Papadas ◽  
K. C. Spyridopoulos ◽  
G. S. Armatas
Keyword(s):  
Visible Light ◽  
Surface Area ◽  
Hydrogen Evolution ◽  
Hydrogen Generation ◽  
Internal Surface ◽  
Internal Surface Area ◽  
Photocatalytic Hydrogen Evolution ◽  
Highly Efficient ◽  
Photocatalytic Hydrogen Generation ◽  
Uv Visible

Mesoporous assemblies of Cu2O/TiO2nanoparticle heterojunctions, which have a large internal surface area and narrow-sized pores, show highly efficient and robust photocatalytic hydrogen evolution from water using UV-visible light.

Composition effect of alloy semiconductors on Pt-tipped Zn1−xCdxSe nanorods for enhanced photocatalytic hydrogen generation

2018 ◽  
Vol 6 (34) ◽  
pp. 16316-16321 ◽  
Author(s):  
Ji Yong Choi ◽  
Ki Min Nam ◽  
Hyunjoon Song
Keyword(s):  
Hydrogen Evolution ◽  
Electron Mobility ◽  
Light Absorption ◽  
Hydrogen Generation ◽  
Composition Effect ◽  
Photocatalytic Hydrogen Evolution ◽  
Photocatalytic Hydrogen Generation ◽  
Alloy Semiconductors

The light absorption and electron mobility of alloy semiconductors significantly influenced the photocatalytic hydrogen evolution of Pt-tipped Zn1−xCdxSe nanorods.

scholarly journals In situ synthesis of g-C3N4/TiO2 heterostructures with enhanced photocatalytic hydrogen evolution under visible light

RSC Advances ◽  
2017 ◽  
Vol 7 (64) ◽  
pp. 40327-40333 ◽  
Author(s):  
Hui Zhang ◽  
Feng Liu ◽  
Hao Wu ◽  
Xin Cao ◽  
Jianhua Sun ◽  
...  
Keyword(s):  
Visible Light ◽  
Hydrogen Evolution ◽  
Visible Light Irradiation ◽  
Hydrogen Generation ◽  
In Situ Synthesis ◽  
Light Irradiation ◽  
Photocatalytic Hydrogen Evolution ◽  
Photocatalytic Hydrogen Generation ◽  
Novel Method

C3N4 nanosheets/TiO2 nano-heterostructures have been synthesized via a novel method, exhibiting excellent photocatalytic hydrogen generation under visible light irradiation.

Large-scale synthesis of stable mesoporous black TiO2 nanosheets for efficient solar-driven photocatalytic hydrogen evolution via an earth-abundant low-cost biotemplate

RSC Advances ◽  
2016 ◽  
Vol 6 (56) ◽  
pp. 50506-50512 ◽  
Author(s):  
Kaifu Zhang ◽  
Wei Zhou ◽  
Xiangcheng Zhang ◽  
Yang Qu ◽  
Lei Wang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Large Scale ◽  
Hydrogen Generation ◽  
Low Cost ◽  
Photocatalytic Hydrogen Evolution ◽  
Photocatalytic Hydrogen Generation ◽  
Tio2 Nanosheets ◽  
Black Tio2 ◽  
Earth Abundant ◽  
Large Scale Synthesis

Stable mesoporous black anatase TiO2 nanosheets (MBTNs) are synthesized via an earth-abundant low-cost biotemplate method combined with an ethanediamine encircling process, and exhibit excellent solar-driven photocatalytic hydrogen generation.

scholarly journals Enhancement of photocatalytic hydrogen evolution with catalysts based on carbonized MOF-5 and g-C3N4

RSC Advances ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 4032-4039 ◽  
Author(s):  
Malgorzata Aleksandrzak ◽  
Krzysztof Sielicki ◽  
Ewa Mijowska
Keyword(s):  
Hydrogen Evolution ◽  
Carbon Nitride ◽  
Hydrogen Generation ◽  
Metal Organic Framework ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Co Catalyst ◽  
Photocatalytic Hydrogen Evolution ◽  
Photocatalytic Hydrogen Generation ◽  
Metal Organic

The study presents enhancement of photocatalytic hydrogen generation after metal–organic framework (MOF5) carbonization at 700 °C and its utilization as a co-catalyst of graphitic carbon nitride (gCN).

In situ synthesis of ultrafine metallic MoO2/carbon nitride nanosheets for efficient photocatalytic hydrogen generation: a prominent cocatalytic effect

2020 ◽  
Vol 10 (12) ◽  
pp. 4053-4060 ◽  
Author(s):  
Xiao-He Liu ◽  
Yun-Xiao Yin ◽  
Fan Du ◽  
Ji-Rui Bai ◽  
Bing Luo ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Carbon Nitride ◽  
Hydrogen Generation ◽  
In Situ Synthesis ◽  
Photocatalytic Hydrogen Evolution ◽  
Photocatalytic Hydrogen Generation ◽  
One Step ◽  
Self Assembled ◽  
Carbon Nitride Nanosheets

A facile strategy for fabricating ultrafine MoO2 cocatalyst particles in situ self-assembled on CN nanosheets to efficiently promote photocatalytic hydrogen evolution by a one-step solvothermal approach.

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