Experimental and DFT insights into an eco-friendly photocatalytic system toward environmental remediation and hydrogen generation based on AgInS2 quantum dots embedded on Bi2WO6

2020 ◽  
Vol 525 ◽  
pp. 146596 ◽  
Author(s):  
Patrycja Parnicka ◽  
Alicja Mikolajczyk ◽  
Henry P. Pinto ◽  
Wojciech Lisowski ◽  
Tomasz Klimczuk ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Environmental Remediation ◽  
Hydrogen Generation ◽  
Photocatalytic System

scholarly journals Remarkable visible-light induced hydrogen generation with ZnIn2S4 microspheres/CuInS2 quantum dots photocatalytic system

2021 ◽  
Vol 46 (1) ◽  
pp. 486-498
Author(s):  
Onur Cavdar ◽  
Anna Malankowska ◽  
Daniel Amgar ◽  
Paweł Mazierski ◽  
Justyna Łuczak ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Visible Light ◽  
Hydrogen Generation ◽  
Photocatalytic System ◽  
Cuins2 Quantum Dots

scholarly journals Proton-assisted electron transfer and hydrogen-atom diffusion in a model system for photocatalytic hydrogen production

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Yuanzheng Zhang ◽  
Yunrong Dai ◽  
Huihui Li ◽  
Lifeng Yin ◽  
Michael R. Hoffmann
Keyword(s):  
Quantum Dots ◽  
Electron Transfer ◽  
Hydrogen Atom ◽  
Molecular Hydrogen ◽  
Carbon Nitride ◽  
Hydrogen Generation ◽  
Hydrogen Gas ◽  
Hydrogen Atoms ◽  
Atom Diffusion ◽  
Photocatalytic System

Abstract Solar energy can be converted into chemical energy by photocatalytic water splitting to produce molecular hydrogen. Details of the photo-induced reaction mechanism occurring on the surface of a semiconductor are not fully understood, however. Herein, we employ a model photocatalytic system consisting of single atoms deposited on quantum dots that are anchored on to a primary photocatalyst to explore fundamental aspects of photolytic hydrogen generation. Single platinum atoms (Pt1) are anchored onto carbon nitride quantum dots (CNQDs), which are loaded onto graphitic carbon nitride nanosheets (CNS), forming a Pt1@CNQDs/CNS composite. Pt1@CNQDs/CNS provides a well-defined photocatalytic system in which the electron and proton transfer processes that lead to the formation of hydrogen gas can be investigated. Results suggest that hydrogen bonding between hydrophilic surface groups of the CNQDs and interfacial water molecules facilitates both proton-assisted electron transfer and sorption/desorption pathways. Surface bound hydrogen atoms appear to diffuse from CNQDs surface sites to the deposited Pt1 catalytic sites leading to higher hydrogen-atom fugacity surrounding each isolated Pt1 site. We identify a pathway that allows for hydrogen-atom recombination into molecular hydrogen and eventually to hydrogen bubble evolution.

Cu oxide quantum dots loaded TiO2 nanosheet photocatalyst for highly efficient and robust hydrogen generation

2021 ◽  
Vol 541 ◽  
pp. 148687
Author(s):  
Gullapelli Sadanandam ◽  
Xiao Luo ◽  
Xuxing Chen ◽  
Yuwen Bao ◽  
Kevin Peter Homewood ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Hydrogen Generation ◽  
Highly Efficient

Enhanced photocatalytic degradation of Rhodamine B, antibacterial and antioxidant activities of green synthesised ZnO/N doped carbon quantum dots nanocomposites

2021 ◽  
Author(s):  
Aschalew Tadesse ◽  
Mebrahtu Hagos Kahsay ◽  
Neway Belachew ◽  
H C Ananda Murthy ◽  
Basavaiah Keloth
Keyword(s):  
Quantum Dots ◽  
Zinc Oxide ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Environmental Remediation ◽  
Antioxidant Activities ◽  
Carbon Quantum Dots ◽  
Step Process ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

In order to explore an alternative photocatalyst for environmental remediation, we report the two-step process to synthesise the zinc oxide/nitrogen doped carbon quantum dots nanocomposites (ZnO@NCQDs NCs). In the first...

Temperature-Dependence Photoelectrochemical Hydrogen Generation Based on Alloyed Quantum Dots

2022 ◽  
Author(s):  
Kanghong Wang ◽  
Jiabin Liu ◽  
Yi Tao ◽  
Daniele Benetti ◽  
Federico Rosei ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Temperature Dependence ◽  
Hydrogen Generation

Multifunctional Ni-Mg-Bimetal-Activated Zn(O,S) for Hydrogen Generation and Environmental Remediation with Simulated Solar-Light Irradiation

2021 ◽  
Author(s):  
Hairus Abdullah ◽  
Hardy Shuwanto ◽  
Dong-Hau Kuo
Keyword(s):  
Hydrogen Production ◽  
Hexavalent Chromium ◽  
Chemical Transformation ◽  
Environmental Remediation ◽  
Hydrogen Generation ◽  
Hydrogenation Reaction ◽  
Light Irradiation ◽  
Simulated Solar Light ◽  
Solar Light Irradiation ◽  
Photocatalytic Applications

Ni-Mg-Bimetal doped Zn(O,S) has been synthesized, characterized, and tested for several photocatalytic applications such as hydrogen production, hydrogenation reaction for chemical transformation, detoxification of hexavalent chromium, and mixed dye (MB...

Spinel photocatalysts for environmental remediation, hydrogen generation, CO2 reduction and photoelectrochemical water splitting

2018 ◽  
Vol 6 (24) ◽  
pp. 11078-11104 ◽  
Author(s):  
Sundaram Chandrasekaran ◽  
Chris Bowen ◽  
Peixin Zhang ◽  
Zheling Li ◽  
Qiuhua Yuan ◽  
...  
Keyword(s):  
Water Splitting ◽  
Environmental Remediation ◽  
Hydrogen Generation ◽  
Co2 Reduction ◽  
Photoelectrochemical Water Splitting ◽  
Photocatalytic Applications

The fundamental aspects, photocatalytic applications and ways to enhance the performance of spinels are systematically reviewed in this paper.

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