Preparation of fine particles of sheelite-monoclinic phase BiVO4via an aqueous chelating method for efficient photocatalytic oxygen evolution under visible-light irradiation

2016 ◽  
Vol 4 (10) ◽  
pp. 3926-3932 ◽  
Author(s):  
Sayuri Okunaka ◽  
Hiromasa Tokudome ◽  
Yutaka Hitomi ◽  
Ryu Abe
Keyword(s):  
Visible Light ◽  
Oxygen Evolution ◽  
Visible Light Irradiation ◽  
Monoclinic Phase ◽  
Fine Particles ◽  
Light Irradiation

Efficient photocatalytic O2 evolution is demonstrated under visible-light on BiVO4 fine particles prepared via a newly developed aqueous chelating method.

Facile water-based preparation of Rh-doped SrTiO3 nanoparticles for efficient photocatalytic H2 evolution under visible light irradiation

2015 ◽  
Vol 3 (28) ◽  
pp. 14794-14800 ◽  
Author(s):  
Sayuri Okunaka ◽  
Hiromasa Tokudome ◽  
Ryu Abe
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Fine Particles ◽  
Light Irradiation ◽  
H2 Evolution ◽  
Highly Efficient ◽  
Water Based ◽  
Photocatalytic H2 Evolution

Highly efficient photocatalytic H2 evolution is demonstrated under visible light on Rh-doped SrTiO3 fine particles prepared from a stable aqueous sol.

scholarly journals MOF-derived (MoS2, γ-Fe2O3)/graphene Z-scheme photocatalysts with excellent activity for oxygen evolution under visible light irradiation

RSC Advances ◽  
2020 ◽  
Vol 10 (29) ◽  
pp. 17154-17162 ◽  
Author(s):  
Ang Li ◽  
Yuxiang Liu ◽  
Xuejun Xu ◽  
Yuanyuan Zhang ◽  
Zhichun Si ◽  
...  
Keyword(s):  
Visible Light ◽  
Oxygen Evolution ◽  
Visible Light Irradiation ◽  
Oxygen Evolution Reaction ◽  
Light Irradiation ◽  
Excellent Activity

The heterojunction between MoS2 and γ-Fe2O3 was constructed via linking by in situ formed graphene, which resulted in a good photocatalyst for the oxygen evolution reaction, showing O2 evolution activity of 4400 μmol g−1 h−1.

Cocatalyst Engineering on a Narrow Bandgap Ga-La5Ti2Cu0.9Ag0.1O7S5 Photocatalyst Towards Effectively Enhanced Water Splitting

2021 ◽  
Author(s):  
Qi Xiao ◽  
Jiadong Xiao ◽  
Junie Jhon M. Vequizo ◽  
Takashi Hisatomi ◽  
Mamiko Nakabayashi ◽  
...  
Keyword(s):  
Visible Light ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Narrow Bandgap

Ga-La5Ti2Cu0.9Ag0.1O7S5 (Ga-LTCA), an oxysulfide photocatalyst, can act as a hydrogen evolution photocatalyst in Z-scheme water splitting systems in conjunction with an oxygen evolution photocatalyst (OEP) under visible light irradiation up...

scholarly journals Enhanced photocatalytic oxygen evolution over Mo-doped Ca2NiWO6 perovskite photocatalyst under visible light irradiation

RSC Advances ◽  
2017 ◽  
Vol 7 (10) ◽  
pp. 5821-5826 ◽  
Author(s):  
Ying Luo ◽  
Jiawei Xue ◽  
Xiaodi Zhu ◽  
Jose Daniel ◽  
Xiang Gao ◽  
...  
Keyword(s):  
Solid State ◽  
Visible Light ◽  
Oxygen Evolution ◽  
Visible Light Irradiation ◽  
Solid State Reaction ◽  
Light Irradiation

A series of Mo-doped Ca2NiWO6 (Ca2NiW1−xMoxO6, x = 0–0.05) was synthesized by a solid-state reaction.

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.

scholarly journals Photocatalytic Activity ofTiO2-WO3Composites

2009 ◽  
Vol 2009 ◽  
pp. 1-7 ◽  
Author(s):  
Beata Tryba ◽  
Michał Piszcz ◽  
Antoni W. Morawski
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Uv Irradiation ◽  
Visible Light Irradiation ◽  
Monoclinic Phase ◽  
Light Irradiation ◽  
Visible Range ◽  
High Adsorption ◽  
Absorption Of Light

TiO2-WO3photocatalysts were prepared in a vacuum evaporator by impregnation ofTiO2withWO2dissolved in anH2O2solution (30%) and followed by calcination at 400 and600∘C. XRD analyses showed that at400∘Cmonoclinic phase ofWO3was dominated whereas at600∘Cboth monoclinic and regular phases ofWO3were present. Modification ofTiO2byWO3caused increasing in the absorption of light to the visible range.TiO2and photocatalysts modified with low amount ofWO3(1–5 wt.%) showed high adsorption of Acid Red (AR) on their surface and enhanced photocatalytic activity under UV irradiation. Under visible light irradiation,TiO2-WO3photocatalysts prepared at400∘Cwere more active for AR decomposition than those prepared at600∘Csuggesting that monoclinic phase ofWO3is more active under visible light than regularWO3. AlthoughTiO2-WO3photocatalysts appeared to be active under visible light for decomposition of AR, the UV irradiation was more efficient.

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>.

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