Nano vs. bulk rutile TiO2:N,F in Z-scheme overall water splitting under visible light

2020 ◽  
Vol 8 (24) ◽  
pp. 11996-12002 ◽  
Author(s):  
Akinobu Miyoshi ◽  
Kosaku Kato ◽  
Toshiyuki Yokoi ◽  
Jan J. Wiesfeld ◽  
Kiyotaka Nakajima ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Water Oxidation ◽  
Rutile Tio2 ◽  
Overall Water Splitting

Nitrogen/fluorine-codoped rutile TiO2 nanoparticles worked more efficiently as a water oxidation photocatalyst in visible-light Z-scheme water splitting than a bulk analogue.

scholarly journals Photocatalyst Z-Scheme System Composed of a Linear Conjugated Polymer and BiVO4 for Overall Water Splitting Under Visible Light

2020 ◽  
Author(s):  
Yang Bai ◽  
Keita Nakagawa ◽  
Alexander Cowan ◽  
Catherine Aitchison ◽  
Yuichi Yamaguchi ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Water Oxidation ◽  
Conjugated Polymer ◽  
High Throughput Screening ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Proton Reduction ◽  
Overall Water Splitting ◽  
Multiple Components

<p>Linear conjugated polymers have potential as photocatalysts for hydrogen production from water but so far, most studies have involved non-scalable sacrificial reagents. Z-schemes comprising more than one semiconductor are a potential solution, but it is challenging to design these systems because multiple components must work together synergistically. Here, we show that a conjugated polymer photocatalyst for proton reduction can be coupled in a Z-scheme with an inorganic water oxidation photocatalyst to promote overall water splitting without any sacrificial reagents. First, a promising combination of an organic catalyst, an inorganic catalyst, and a redox mediator was identified by using high-throughput screening of a library of components. A Z-scheme system composed of P10 (homopolymer of dibenzo[<i>b</i>,<i>d</i>]thiophene sulfone)-Fe<sup>2+</sup>/Fe<sup>3+</sup>-BiVO<sub>4</sub> was then constructed for overall water splitting under visible light irradiation. Transient absorption spectroscopy was used to assign timescales to the various steps in the photocatalytic process. While the overall solar-to-hydrogen efficiency of this first example is low, it provides proof of concept for other hybrid organic-inorganic Z-scheme architectures in the future.</p>

scholarly journals Photocatalyst Z-Scheme System Composed of a Linear Conjugated Polymer and BiVO4 for Overall Water Splitting Under Visible Light

2020 ◽  
Author(s):  
Yang Bai ◽  
Keita Nakagawa ◽  
Alexander Cowan ◽  
Catherine Aitchison ◽  
Yuichi Yamaguchi ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Water Oxidation ◽  
Conjugated Polymer ◽  
High Throughput Screening ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Proton Reduction ◽  
Overall Water Splitting ◽  
Multiple Components

<p>Linear conjugated polymers have potential as photocatalysts for hydrogen production from water but so far, most studies have involved non-scalable sacrificial reagents. Z-schemes comprising more than one semiconductor are a potential solution, but it is challenging to design these systems because multiple components must work together synergistically. Here, we show that a conjugated polymer photocatalyst for proton reduction can be coupled in a Z-scheme with an inorganic water oxidation photocatalyst to promote overall water splitting without any sacrificial reagents. First, a promising combination of an organic catalyst, an inorganic catalyst, and a redox mediator was identified by using high-throughput screening of a library of components. A Z-scheme system composed of P10 (homopolymer of dibenzo[<i>b</i>,<i>d</i>]thiophene sulfone)-Fe<sup>2+</sup>/Fe<sup>3+</sup>-BiVO<sub>4</sub> was then constructed for overall water splitting under visible light irradiation. Transient absorption spectroscopy was used to assign timescales to the various steps in the photocatalytic process. While the overall solar-to-hydrogen efficiency of this first example is low, it provides proof of concept for other hybrid organic-inorganic Z-scheme architectures in the future.</p>

scholarly journals Au decorated BiVO4 inverse opal for efficient visible light driven water oxidation

RSC Advances ◽  
2021 ◽  
Vol 11 (15) ◽  
pp. 8751-8758
Author(s):  
Xiaonong Wang ◽  
Xiaoxia Li ◽  
Jingxiang Low
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Water Oxidation ◽  
Inverse Opal ◽  
Photocatalytic Water Splitting ◽  
Visible Light Driven

Photocatalytic water splitting provides an effective way to prepare hydrogen and oxygen.

Visible light-driven novel g-C3N4/NiFe-LDH composite photocatalyst with enhanced photocatalytic activity towards water oxidation and reduction reaction

2015 ◽  
Vol 3 (36) ◽  
pp. 18622-18635 ◽  
Author(s):  
Susanginee Nayak ◽  
Lagnamayee Mohapatra ◽  
Kulamani Parida
Keyword(s):  
Photocatalytic Activity ◽  
Composite Materials ◽  
Visible Light ◽  
Water Splitting ◽  
Visible Light Irradiation ◽  
Water Oxidation ◽  
Reduction Reaction ◽  
Light Irradiation ◽  
Composite Photocatalyst ◽  
Visible Light Driven

Dispersion of exfoliated CN over the surface of exfoliated LDH composite materials, and its photocatalytic water splitting under visible-light irradiation.

Linking Melem with Conjugated Schiff-Base Bond to Boost Photocatalytic Efficiency of Carbon Nitride for Overall Water Splitting

Nanoscale ◽  
2021 ◽  
Author(s):  
Hu Liu ◽  
Mengqi Shen ◽  
Peng Zhou ◽  
Zhi Guo ◽  
Xinyang Liu ◽  
...  
Keyword(s):  
Schiff Base ◽  
Visible Light ◽  
Water Splitting ◽  
Visible Light Irradiation ◽  
Carbon Nitride ◽  
Light Irradiation ◽  
Graphitic Carbon Nitride ◽  
Photocatalytic Efficiency ◽  
Metal Free ◽  
Overall Water Splitting

Developing an efficient single component photocatalyst for overall water splitting under visible-light irradiation is extremely challenging. Herein, we report a metal-free graphitic carbon nitride (g-CxN4)-based nanosheet photocatalyst (x = 3.2,...

scholarly journals Photocatalytic Overall Water Splitting by SrTiO3 with Surface Oxygen Vacancies

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2572
Author(s):  
Yanfei Fan ◽  
Yan Liu ◽  
Hongyu Cui ◽  
Wen Wang ◽  
Qiaoyan Shang ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Oxygen Vacancies ◽  
Low Cost ◽  
Energy Levels ◽  
Light Response ◽  
Hydrogen Energy ◽  
Surface Oxygen ◽  
Carbon Reduction ◽  
Overall Water Splitting

Strontium Titanate has a typical perovskite structure with advantages of low cost and photochemical stability. However, the wide bandgap and rapid recombination of electrons and holes limited its application in photocatalysis. In this work, a SrTiO3 material with surface oxygen vacancies was synthesized via carbon reduction under a high temperature. It was successfully applied for photocatalytic overall water splitting to produce clean hydrogen energy under visible light irradiation without any sacrificial reagent for the first time. The photocatalytic overall water splitting ability of the as-prepared SrTiO3-C950 is attributed to the surface oxygen vacancies that can make suitable energy levels for visible light response, improving the separation and transfer efficiency of photogenerated carriers.

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