Ligand-Free Heck Reactions of Aryl Iodides: Significant Acceleration of the Rate through Visible Light Irradiation at Ambient Temperature

2016 ◽  
Vol 358 (23) ◽  
pp. 3736-3742 ◽  
Author(s):  
Heng Zhang ◽  
Xueliang Huang
Keyword(s):  
Visible Light ◽  
Ambient Temperature ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Heck Reactions ◽  
Aryl Iodides ◽  
Significant Acceleration ◽  
Ligand Free

Pd@CeO 2 ‐catalyzed cyanation of aryl iodides with K 4 Fe(CN) 6 ·3H 2 O under visible light irradiation

2021 ◽  
Author(s):  
Shengyu Wang ◽  
Jianqiang Wang ◽  
Junyi Pan ◽  
Cheng Liu ◽  
Xubin Gong ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Aryl Iodides

Macroporous TiO2encapsulated Au@Pd bimetal nanoparticles for the photocatalytic oxidation of alcohols in water under visible-light

RSC Advances ◽  
2016 ◽  
Vol 6 (109) ◽  
pp. 107233-107238 ◽  
Author(s):  
Xiaohui Wang ◽  
Dahu Baiyila ◽  
Xiaotian Li
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Ambient Temperature ◽  
Visible Light Irradiation ◽  
Photocatalytic Oxidation ◽  
Aerobic Oxidation ◽  
Light Irradiation ◽  
Oxidizing Agent ◽  
Oxidation Of Alcohols

A novel macroporous photocatalyst Au@Pd@TiO2has been reported and showed excellent catalytic activity and stability in the aerobic oxidation of alcohols in water at ambient temperature when using air as the oxidizing agent under visible light irradiation.

The enhanced catalytic performance of Pd/SiC for the hydrogenation of furan derivatives at ambient temperature under visible light irradiation

2014 ◽  
Vol 4 (8) ◽  
pp. 2494-2498 ◽  
Author(s):  
Zhi-Feng Jiao ◽  
Xiao-Ning Guo ◽  
Zhao-Yang Zhai ◽  
Guo-Qiang Jin ◽  
Xiao-Min Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Ambient Temperature ◽  
Visible Light Irradiation ◽  
Catalytic Performance ◽  
Light Irradiation ◽  
Furan Derivatives

Pd/SiC exhibits a tremendous promotion of catalytic activity for the hydrogenation of furan derivatives at ambient temperature under visible light irradiation.

[Bmmim]6[In10Se16Cl4]·(MIm)2: an organic-ligand free discrete T3 cluster for efficient hydrogen evolution under visible light irradiation

2020 ◽  
Vol 49 (16) ◽  
pp. 5020-5023 ◽  
Author(s):  
Yanqi Wang ◽  
Qianqian Hu ◽  
Jiance Jin ◽  
Jilong Li ◽  
Jianrong Li ◽  
...  
Keyword(s):  
Solid State ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Visible Light Irradiation ◽  
Organic Ligand ◽  
Light Irradiation ◽  
Photocatalytic Hydrogen Evolution ◽  
Ligand Free

An organic-ligand free selenide T3 cluster exhibits a much higher photocatalytic hydrogen evolution activity after being stably dispersed in a solvent (6.5 times) than that in the solid state.

Photocatalytic Sonogashira reaction over silicon carbide supported Pd–Cu alloy nanoparticles under visible light irradiation

2018 ◽  
Vol 8 (13) ◽  
pp. 3357-3362 ◽  
Author(s):  
Bing Wang ◽  
Yingyong Wang ◽  
Jiazhou Li ◽  
Xiaoning Guo ◽  
Gailing Bai ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Sonogashira Reaction ◽  
Alloy Nanoparticles ◽  
Mild Conditions ◽  
Cu Alloy ◽  
Ligand Free ◽  
Supported Pd

PdCu alloy nanoparticles supported on SiC can efficiently catalyze the Sonogashira reaction by visible light irradiation under ligand-free and mild conditions. The superior catalytic activity of PdCu catalysts was caused by the synergistic effect of PdCu alloy nanoparticles.

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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