Improvement of Photoelectrochemical HClO Production under Visible Light Irradiation by Loading Cobalt Oxide onto BiVO4 Photoanode

2021 ◽  
Author(s):  
Sayuri Okunaka ◽  
Yugo Miseki ◽  
Kazuhiro Sayama
Keyword(s):  
Visible Light ◽  
Cobalt Oxide ◽  
Visible Light Irradiation ◽  
Hypochlorous Acid ◽  
Value Added ◽  
Light Irradiation ◽  
Simultaneous Production ◽  
A Value ◽  
Semiconductor Electrode

Photoelectrochemical simultaneous production of H2 and hypochlorous acid (HClO) as a value-added oxidation reagent compared with O2 on a semiconductor electrode by using visible light is one of the breakthrough...

Porphyrin and single atom featured reticular materials: recent advances and future perspective of solar-driven CO2 reduction

2021 ◽  
Author(s):  
Vishnu Nair Gopalakrishnan ◽  
Jorge Becerra ◽  
Edward F. Pena ◽  
Mohan Sakar ◽  
Francois Béland ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Co2 Reduction ◽  
Value Added ◽  
Light Irradiation ◽  
Single Atom ◽  
Future Perspective ◽  
Covalent Organic Frameworks ◽  
Recent Advances

Insights into the porphyrin and single-atom featured metal- and covalent-organic frameworks for photocatalytic conversion of CO2 into value-added chemical feedstocks under visible light irradiation.

Synthesis of novel CoOx decorated CeO2 hollow structures with an enhanced photocatalytic water oxidation performance under visible light irradiation

2017 ◽  
Vol 46 (32) ◽  
pp. 10578-10585 ◽  
Author(s):  
Siman Fang ◽  
Songsong Li ◽  
Lei Ge ◽  
Changcun Han ◽  
Ping Qiu ◽  
...  
Keyword(s):  
Visible Light ◽  
Cobalt Oxide ◽  
Visible Light Irradiation ◽  
Water Oxidation ◽  
Light Irradiation ◽  
Impregnation Method ◽  
Hollow Structures ◽  
Simple Chemical ◽  
Oxidation Performance

Cobalt oxide decorated octahedral ceria hollow structures (CoOx/CeO2) with various contents of CoOx nanoparticles were prepared via a simple chemical impregnation method.

Visible light-induced photochemical oxygen evolution from water by 3,4,9,10-perylenetetracarboxylic dianhydride nanorods as an n-type organic semiconductor

2016 ◽  
Vol 6 (3) ◽  
pp. 672-676 ◽  
Author(s):  
Jia-Xin Li ◽  
Zhi-Jun Li ◽  
Chen Ye ◽  
Xu-Bing Li ◽  
Fei Zhan ◽  
...  
Keyword(s):  
Visible Light ◽  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Visible Light Irradiation ◽  
Organic Semiconductor ◽  
Light Irradiation

The designed nanorods with cobalt oxide achieve an AQE of 4.6 ± 0.3% for oxygen evolution under visible light irradiation at 410 nm.

Cu Doped TiO2: Visible Light Assisted Photocatalytic Antimicrobial Activity and High Temperature Anatase Stability

2018 ◽  
Author(s):  
Snehamol Mathew ◽  
Priyanka Ganguly ◽  
Stephen Rhatigan ◽  
Vignesh Kumaravel ◽  
Ciara Byrne ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Density Functional ◽  
Anatase Phase ◽  
Sol Gel ◽  
Chemical Properties ◽  
Light Irradiation ◽  
Health Concern ◽  
Bacterial Inactivation ◽  
X Ray

Indoor surface contamination by microbes is a major public health concern. A damp environment is one potential sources for microbe proliferation. Smart photocatalytic coatings on building surfaces using semiconductors like titania (TiO<sub>2</sub>) can effectively curb this growing threat.<b> </b>Metal-doped titania in anatase phase has been proved as a promising candidate for energy and environmental applications. In this present work, the antimicrobial efficacy of copper (Cu) doped TiO<sub>2 </sub>(Cu-TiO<sub>2</sub>) was evaluated against <i>Escherichia coli</i> (Gram-negative) and <i>Staphylococcus aureus</i> (Gram-positive) under visible light irradiation. Doping of a minute fraction of Cu (0.5 mol %) in TiO<sub>2 </sub>was carried out <i>via</i> sol-gel technique. Cu-TiO<sub>2</sub> further calcined at various temperatures (in the range of 500 °C – 700 °C) to evaluate the thermal stability of TiO<sub>2</sub> anatase phase. The physico-chemical properties of the samples were characterised through X-ray diffraction (XRD), Raman spectroscopy, X-ray photo-electron spectroscopy (XPS) and UV-visible spectroscopy techniques. XRD results revealed that the anatase phase of TiO<sub>2</sub> was maintained well, up to 650 °C, by the Cu dopant. UV-DRS results suggested that the visible light absorption property of Cu-TiO<sub>2 </sub>was enhanced and the band gap is reduced to 2.8 eV. Density functional theory (DFT) studies emphasises the introduction of Cu<sup>+</sup> and Cu<sup>2+</sup> ions by replacing Ti<sup>4+</sup> ions in the TiO<sub>2</sub> lattice, creating oxygen vacancies. These further promoted the photocatalytic efficiency. A significantly high bacterial inactivation (99.9%) was attained in 30 mins of visible light irradiation by Cu-TiO<sub>2</sub>.

Semiconductor Photocatalysts for Solar-to-Hydrogen Energy Conversion: Recent Advances of CdS

2020 ◽  
Vol 16 ◽  
Author(s):  
Yuxue Wei ◽  
Honglin Qin ◽  
Jinxin Deng ◽  
Xiaomeng Cheng ◽  
Mengdie Cai ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Visible Light Irradiation ◽  
Noble Metals ◽  
Light Irradiation ◽  
Photocatalytic Hydrogen Evolution ◽  
Theoretical Design ◽  
Recent Developments

Introduction: Solar-driven photocatalytic hydrogen production from water splitting is one of the most promising solutions to satisfy the increasing demands of a rapidly developing society. CdS has emerged as a representative semiconductor photocatalyst due to its suitable band gap and band position. However, the poor stability and rapid charge recombination of CdS restrict its application for hydrogen production. The strategy of using a cocatalyst is typically recognized as an effective approach for improving the activity, stability, and selectivity of photocatalysts. In this review, recent developments in CdS cocatalysts for hydrogen production from water splitting under visible-light irradiation are summarized. In particular, the factors affecting the photocatalytic performance and new cocatalyst design, as well as the general classification of cocatalysts, are discussed, which includes a single cocatalyst containing noble-metal cocatalysts, non-noble metals, metal-complex cocatalysts, metal-free cocatalysts, and multi-cocatalysts. Finally, future opportunities and challenges with respect to the optimization and theoretical design of cocatalysts toward the CdS photocatalytic hydrogen evolution are described. Background: Photocatalytic hydrogen evolution from water splitting using photocatalyst semiconductors is one of the most promising solutions to satisfy the increasing demands of a rapidly developing society. CdS has emerged as a representative semiconductor photocatalyst due to its suitable band gap and band position. However, the poor stability and rapid charge recombination of CdS restrict its application for hydrogen production. The strategy of using a cocatalyst is typically recognized as an effective approach for improving the activity, stability, and selectivity of photocatalysts. Methods: This review summarizes the recent developments in CdS cocatalysts for hydrogen production from water splitting under visible-light irradiation. Results: Recent developments in CdS cocatalysts for hydrogen production from water splitting under visible-light irradiation are summarized. The factors affecting the photocatalytic performance and new cocatalyst design, as well as the general classification of cocatalysts, are discussed, which includes a single cocatalyst containing noble-metal cocatalysts, non-noble metals, metal-complex cocatalysts, metal-free cocatalysts, and multi-cocatalysts. Finally, future opportunities and challenges with respect to the optimization and theoretical design of cocatalysts toward the CdS photocatalytic hydrogen evolution are described. Conclusion: The state-of-the-art CdS for producing hydrogen from photocatalytic water splitting under visible light is discussed. The future opportunities and challenges with respect to the optimization and theoretical design of cocatalysts toward the CdS photocatalytic hydrogen evolution are also described.

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