Effective use of photogenerated electrons and holes in a system: Photocatalytic selective oxidation of aromatic alcohols to aldehydes and hydrogen production

2018 ◽  
Vol 367 ◽  
pp. 159-170 ◽  
Author(s):  
Sugang Meng ◽  
Xiangju Ye ◽  
Jinghu Zhang ◽  
Xianliang Fu ◽  
Shifu Chen
Keyword(s):  
Hydrogen Production ◽  
Selective Oxidation ◽  
Photogenerated Electrons ◽  
Aromatic Alcohols ◽  
Effective Use

A novel cobalt ion implanted pyridylporphyrin/graphene oxide assembly for enhanced photocatalytic hydrogen production

2018 ◽  
Vol 22 (09n10) ◽  
pp. 877-885 ◽  
Author(s):  
Qiang Luo ◽  
Kun Zhu ◽  
Shi-Zhao Kang ◽  
Lixia Qin ◽  
Sheng Han ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Electrostatic Interaction ◽  
Strong Interaction ◽  
Photocatalytic Performance ◽  
Coordination Interaction ◽  
Photogenerated Electrons

By facilely pre-implanting Co[Formula: see text] ions in the graphene oxide, a novel 5,15-diphenyl-10,20-di(4-pyridyl)porphyrin pillared graphene oxide was fabricated by means of electrostatic interaction and coordination interaction. It was shown that the morphology and the structure of graphene oxide and pyridylporphyrin nanocomposite were modified by introducing Co[Formula: see text] ions on the interface between graphene oxide and pyridylporphyrin. Furthermore, it was found that the photocatalytic hydrogen evolution activity over the Co[Formula: see text] ions implanted in the graphene oxide and pyridylporphyrin nanocomposite was evidently higher than in the graphene oxide and pyridylporphyrin nanocomposite without Co[Formula: see text]. This confirmed that strong interaction and efficient electron transfer between pyridylporphyrin and graphene oxide are the important reasons for the enhanced photocatalytic activity for hydrogen evolution. Subsequently, this technique will be a simple and efficient approach to optimize the transfer pathway of photogenerated electrons and to improve photocatalytic performance by implanting metal ions in the interface of nanocomposites.

Electrochemical selective oxidation of aromatic alcohols with sodium nitrate mediator in biphasic medium at ambient temperature

2012 ◽  
Vol 53 (23) ◽  
pp. 2802-2804 ◽  
Author(s):  
C. Christopher ◽  
S. Lawrence ◽  
M. Anbu Kulandainathan ◽  
K. Kulangiappar ◽  
M. Easu Raja ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
Selective Oxidation ◽  
Sodium Nitrate ◽  
Aromatic Alcohols ◽  
Biphasic Medium

Ir nanoparticles with multi-enzyme activities and its application in the selective oxidation of aromatic alcohols

2020 ◽  
Vol 267 ◽  
pp. 118725 ◽  
Author(s):  
Guangxia Jin ◽  
Jie Liu ◽  
Chan Wang ◽  
Wenxiu Gu ◽  
Guoxia Ran ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Enzyme Activities ◽  
Aromatic Alcohols

Spatial distribution of active sites on a ferroelectric PbTiO3 photocatalyst for photocatalytic hydrogen production

2017 ◽  
Vol 198 ◽  
pp. 463-472 ◽  
Author(s):  
Rengui Li ◽  
Yue Zhao ◽  
Can Li
Keyword(s):  
Spatial Distribution ◽  
Hydrogen Production ◽  
Solar Energy ◽  
Energy Conversion ◽  
Electric Fields ◽  
Charge Separation ◽  
Active Sites ◽  
Solar Energy Conversion ◽  
Photogenerated Electrons ◽  
The Right

The separation of photogenerated charge carries is a challenging issue in artificial photocatalyst systems for solar energy conversion. It has been reported that spatial charge separation can take place between different facets of semiconductor-based crystals with regular morphology and facets, which could be used to rationally deposit cocatalysts on the right facets. However, the spatial separation of photogenerated electrons and holes is still a big challenge for a particulate photocatalyst without regular morphology and specific facets. In this work, we demonstrated that photogenerated electrons and holes can be regularly separated on ferroelectric PbTiO3 photocatalyst even without regular morphology and facets. The reduction cocatalyst and oxidation cocatalyst could be selectively formed on different sites via an in situ photochemical deposition method. It is found that the photoactivity and hydrogen production for PbTiO3 with spatially separated dual-cocatalysts is remarkably enhanced to more than 100 times greater compared to native PbTiO3, which is much higher than that the case of dual-cocatalysts with a random distribution. The intrinsic electric fields and spontaneous electric polarization in the bulk of PbTiO3 are proposed to play important roles in the spatial distribution of active sites on irregular PbTiO3 particles. Our work emphasizes the essential roles of two important factors, efficient charge separation strategy and the location of dual-cocatalysts on the right sites, to construct integrated artificial photocatalyst systems for solar energy conversion.

scholarly journals Amino acid-assisted synthesis of In2S3 hierarchical architectures for selective oxidation of aromatic alcohols to aromatic aldehydes

RSC Advances ◽  
2017 ◽  
Vol 7 (11) ◽  
pp. 6457-6466 ◽  
Author(s):  
Tongtong Li ◽  
Sujuan Zhang ◽  
Sugang Meng ◽  
Xiangju Ye ◽  
Xianliang Fu ◽  
...  
Keyword(s):  
Amino Acid ◽  
High Activity ◽  
Selective Oxidation ◽  
Aromatic Aldehydes ◽  
Aromatic Alcohols ◽  
Hierarchical Architectures

Flowerlike-In2S3 photocatalyst was prepared via a biosynthesis technique and showed high activity toward the selective oxidation of aromatic alcohols.

scholarly journals Integrating hydrogen production with anodic selective oxidation of sulfides over a CoFe layered double hydroxide electrode

2021 ◽  
Author(s):  
Lina Ma ◽  
Hua Zhou ◽  
Ming Xu ◽  
Peipei Hao ◽  
Xianggui Kong ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Selective Oxidation ◽  
Layered Double Hydroxide ◽  
Sulfide Oxidation ◽  
Pharmaceutical Compounds ◽  
Oxidation Of Sulfides ◽  
Double Hydroxide

Replacing anodic OER with selective sulfide oxidation produces sulfoxide-related pharmaceutical compounds over a CoFe-LDH catalyst with enhanced HER, providing a sustainable protocol for valuable pharmaceuticals synthesis without external oxidants.

Gold nanoparticle-modified TiO2/SBA-15 nanocomposites as active plasmonic photocatalysts for the selective oxidation of aromatic alcohols

RSC Advances ◽  
2016 ◽  
Vol 6 (74) ◽  
pp. 70352-70363 ◽  
Author(s):  
Yu Chen ◽  
Weizun Li ◽  
Jingyu Wang ◽  
Qian Yang ◽  
Qidong Hou ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Mesoporous Silica ◽  
Gold Nanoparticle ◽  
Selective Oxidation ◽  
Noble Metal ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Catalytic Performance ◽  
Light Irradiation ◽  
Aromatic Alcohols

The catalytic performance of noble-metal on mesoporous silica hosts has been widely investigated because the effects of surface plasmon resonance can open new avenues for the improvement of catalytic performance under light irradiation.

MOF-based photocatalysts for hydrogen production

2021 ◽  
Vol 02 ◽  
Author(s):  
Juan-Ding Xiao ◽  
Xiao-Qing Jiang ◽  
Guang Zeng ◽  
Bin Yu
Keyword(s):  
Hydrogen Production ◽  
Redox Reactions ◽  
High Specific Surface Area ◽  
Efficient Utilization ◽  
Electron Hole ◽  
Crystalline Materials ◽  
Photogenerated Electrons ◽  
Metal Organic ◽  
Recombination Centers ◽  
Surface Redox

: Metal-Organic Frameworks (MOFs) are a class of porous crystalline materials that assembled by multiple metal ions and organic linkers, featuring with high specific surface area and tailorable structures. MOFs exhibit semiconductorlike behavior due to the inorganic fragment in the framework. Principally, the perfect crystalline structure inhibit the formation of charge recombination centers, and their porous characters facilitate the rapid/efficient utilization of the photogenerated electrons and holes. Therefore, in recent years, MOF based materials have received increasing attention for application in photocatalysis. Here, starting from the photocatalytic mechanism toward hydrogen production on MOF based materials, the three key photocatalytic processes: light absorption, electron-hole separation and surface redox reactions, will be illustrated according to the recent reports. In addition, MOF derivatives for photocatalytic hydrogen production is briefly introduced. Finally, the conclusions and perspectives are provided to in-depth elucidate the future development of MOF based photocatalysts.

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