Well-controlled RAFT polymerization initiated by recyclable surface-modified Nb(OH)5 nanoparticles under visible light irradiation

2014 ◽  
Vol 52 (19) ◽  
pp. 2715-2724 ◽  
Author(s):  
Jizhen Zhang ◽  
Aihua Li ◽  
Huihui Liu ◽  
Dongjiang Yang ◽  
Jingquan Liu
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Raft Polymerization ◽  
Light Irradiation ◽  
Surface Modified

Toward rapid aqueous RAFT polymerization of primary amine functional monomer under visible light irradiation at 25 °C

2013 ◽  
Vol 4 (4) ◽  
pp. 1176-1182 ◽  
Author(s):  
Guhuan Liu ◽  
Hui Shi ◽  
Yuru Cui ◽  
Jianyu Tong ◽  
Ying Zhao ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Primary Amine ◽  
Raft Polymerization ◽  
Light Irradiation ◽  
Functional Monomer

Photocatalytic property of surface-modified TiO2 nanobelts under visible light irradiation

2011 ◽  
Vol 58 (3) ◽  
pp. 705-710 ◽  
Author(s):  
Enhua Wang ◽  
Suwen Liu ◽  
Qifang Lu ◽  
Zhiliang Xiu ◽  
Tanggang Li ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Photocatalytic Property ◽  
Light Irradiation ◽  
Tio2 Nanobelts ◽  
Surface Modified

Visible-light-induced water oxidation by a hybrid photocatalyst consisting of bismuth vanadate and copper(ii) meso-tetra(4-carboxyphenyl)porphyrin

2016 ◽  
Vol 52 (18) ◽  
pp. 3665-3668 ◽  
Author(s):  
Shu Nakashima ◽  
Ryo Negishi ◽  
Hiroaki Tada
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Water Oxidation ◽  
Bismuth Vanadate ◽  
Light Irradiation ◽  
Level Of Activity ◽  
High Level ◽  
Surface Modified ◽  
Hybrid Photocatalyst

Copper(ii) meso-tetra(4-carboxyphenyl)porphyrin surface-modified monoclinic scheelite bismuth vanadate (CuTCPP/ms-BiVO4) exhibits a high level of activity for the water oxidation to oxygen (O2) under visible-light irradiation (λ > 430 nm).

Surface-modified metal sulfides as stable H2-evolving photocatalysts in Z-scheme water splitting with a [Fe(CN)6]3−/4−redox mediator under visible-light irradiation

2017 ◽  
Vol 1 (5) ◽  
pp. 1065-1073 ◽  
Author(s):  
Takashi Shirakawa ◽  
Masanobu Higashi ◽  
Osamu Tomita ◽  
Ryu Abe
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Visible Light Irradiation ◽  
Redox Mediator ◽  
Light Irradiation ◽  
Metal Sulfides ◽  
Electron Mediator ◽  
Surface Modified

Z-scheme water splitting was achieved using K2[CdFe(CN)6]-modified metal sulfides as H2-evolving photocatalysts combined with CoOx-loaded TaON photoanode in the presence of [Fe(CN)6]3−/4−as an electron mediator.

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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