Journal ArticleDOI
A metal-free polymeric photocatalyst for hydrogen production from water under visible light
Xinchen Wang,Kazuhiko Maeda,Arne Thomas,Kazuhiro Takanabe,Gang Xin,Johan M. Carlsson,Kazunari Domen,Markus Antonietti +7 more
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TLDR
It is shown that an abundant material, polymeric carbon nitride, can produce hydrogen from water under visible-light irradiation in the presence of a sacrificial donor.Abstract:
The production of hydrogen from water using a catalyst and solar energy is an ideal future energy source, independent of fossil reserves. For an economical use of water and solar energy, catalysts that are sufficiently efficient, stable, inexpensive and capable of harvesting light are required. Here, we show that an abundant material, polymeric carbon nitride, can produce hydrogen from water under visible-light irradiation in the presence of a sacrificial donor. Contrary to other conducting polymer semiconductors, carbon nitride is chemically and thermally stable and does not rely on complicated device manufacturing. The results represent an important first step towards photosynthesis in general where artificial conjugated polymer semiconductors can be used as energy transducers.read more
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Visible-Light-Promoted Selective Oxidation of Alcohols Using a Covalent Triazine Framework
TL;DR: In this article, a thiophene-based covalent triazine framework (CTF) was used as a pure organic and visible-light-active photocatalyst for the selective oxidation of alcohols at room temperature.
Journal ArticleDOI
Urea‐Modified Carbon Nitrides: Enhancing Photocatalytic Hydrogen Evolution by Rational Defect Engineering
Vincent Wing-hei Lau,Victor Yu,Florian Ehrat,Florian Ehrat,Tiago Botari,Igor L. Moudrakovski,Thomas Simon,Thomas Simon,Viola Duppel,Elise Medina,Jacek K. Stolarczyk,Jacek K. Stolarczyk,Jochen Feldmann,Jochen Feldmann,Volker Blum,Bettina V. Lotsch,Bettina V. Lotsch,Bettina V. Lotsch +17 more
TL;DR: In this paper, the primary amine groups on the heptazine-based polymer melon, also known as graphitic carbon nitride (g-C3N4), can be replaced by urea groups using a two-step postsynthetic functionalization.
Journal ArticleDOI
Simultaneous Noncovalent Modification and Exfoliation of 2D Carbon Nitride for Enhanced Electrochemiluminescent Biosensing
TL;DR: It is reported that, in conjunction with a π-π stacking interaction, bulk CN could be simultaneously exfoliated via facile mechanical grinding and obtained CN nanosheets (m-CNNS), which not only retained the pristine optoelectronic properties of bulk CN but also enriched a friendly interface for further coupling biomolecules with advanced properties, overcoming the deficiencies of CN in surface science.
Journal ArticleDOI
Enhanced organic pollutant photodegradation via adsorption/photocatalysis synergy using a 3D g-C3N4/TiO2 free-separation photocatalyst
TL;DR: The 3D g-C3N4/TiO2 heterojunction photocatalyst with separation free can facilitate the potential application in the treatment of water pollution.
Journal ArticleDOI
Electrodeposited Aluminum-Doped α-Fe2O3 Photoelectrodes: Experiment and Theory
Alan Kleiman-Shwarsctein,Muhammad N. Huda,Aron Walsh,Yanfa Yan,Galen D. Stucky,Yong-Sheng Hu,Yong-Sheng Hu,Mowafak Al-Jassim,Eric W. McFarland +8 more
TL;DR: In this article, the effect of substitutional doping on the crystal lattice of α-Fe2O3 films was investigated for photoelectrochemical hydrogen production, and the results indicated that the incident photon conversion efficiency (IPCE) for ∼ 0.45 at-% Al substitution increases by 2- to 3-fold over undoped samples.
References
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Journal ArticleDOI
First principles methods using CASTEP
Stewart J. Clark,Matthew D. Segall,Chris J. Pickard,P. J. Hasnip,Matt Probert,Keith Refson,Mike C. Payne +6 more
TL;DR: The CASTEP program as mentioned in this paper is a computer program for first principles electro-Nic structure calculations, and some of its features and capabilities are described and near-future development plans outlined.
Journal ArticleDOI
Photocatalyst releasing hydrogen from water
Kazuhiko Maeda,Kentaro Teramura,Daling Lu,Tsuyoshi Takata,Nobuo Saito,Yasunobu Inoue,Kazunari Domen +6 more
TL;DR: An advance in the catalysis of the overall splitting of water under visible light is described: the new catalyst is a solid solution of gallium and zinc nitrogen oxide, modified with nanoparticles of a mixed oxide of rhodium and chromium, which functions as a promising and efficient photocatalyst in promoting the evolution of hydrogen gas.
Journal ArticleDOI
A Monolithic Photovoltaic-Photoelectrochemical Device for Hydrogen Production via Water Splitting
O. Khaselev,John A. Turner +1 more
TL;DR: Direct water electrolysis was achieved with a novel, integrated, monolithic photoelectrochemical-photovoltaic design that splits water directly upon illumination; light is the only energy input.
Journal ArticleDOI
Composition, structure, and stability of RuO 2 ( 110 ) as a function of oxygen pressure
TL;DR: In this article, the Gibbs free energy was calculated to determine the lowest energy structure of a transition metal oxide surface in thermodynamic equilibrium with an oxygen-rich environment, and it was shown that the commonly assumed stoichiometric termination is only favorable at low oxygen chemical potentials, i.e., low pressures and/or high temperatures.
Journal ArticleDOI
New Non-Oxide Photocatalysts Designed for Overall Water Splitting under Visible Light
TL;DR: In this article, the development of visible-light-driven photocatalysts focusing on the refinement of non-oxide-type photocatalyst such as (oxy)nitrides and oxysulfides is discussed.
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