scholarly journals Enhanced photocatalytic activity of a B12-based catalyst co-photosensitized by TiO2 and Ru(ii) towards dechlorination

RSC Advances ◽  
2018 ◽  
Vol 8 (2) ◽  
pp. 662-670 ◽  
Author(s):  
Ying Sun ◽  
Wei Zhang ◽  
Tian-Yi Ma ◽  
Yu Zhang ◽  
Hisashi Shimakoshi ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photocatalytic Activity ◽  
System P ◽  
Photocatalytic System

The additivity of the contribution of the UV and visible parts of sunlight to electron transfer was confirmed in the B12–TiO2–Ru(ii) photocatalytic system.

scholarly journals Elucidating light-induced charge accumulation in an artificial analogue of methane monooxygenase enzymes using time-resolved X-ray absorption spectroscopy

2017 ◽  
Vol 53 (18) ◽  
pp. 2725-2728 ◽  
Author(s):  
Dooshaye Moonshiram ◽  
Antonio Picón ◽  
Alvaro Vazquez-Mayagoitia ◽  
Xiaoyi Zhang ◽  
Ming-Feng Tu ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Charge Accumulation ◽  
Time Resolved ◽  
X Ray ◽  
Transfer Processes ◽  
System P ◽  
Photocatalytic System ◽  
Induced Charge ◽  
Electron Transfer Processes ◽  
X Ray Absorption

Probing the light-induced two electron transfer processes at a diiron(iii,iii) multimolecular photocatalytic system.

Tuning the Photocatalytic Performance of Plasmonic Nanocomposites (ZnO/Aux) Driven in Visible Light

2019 ◽  
Vol 8 (1) ◽  
pp. 56-61
Author(s):  
Aneeya K. Samantara ◽  
Debasrita Dash ◽  
Dipti L. Bhuyan ◽  
Namita Dalai ◽  
Bijayalaxmi Jena
Keyword(s):  
Electron Transfer ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Transfer Rate ◽  
Photocatalytic Performance ◽  
Light Exposure ◽  
Au Nanoparticle ◽  
Electron Transfer Rate ◽  
Au Nps ◽  
Zno Nanostructure

: In this article, we explored the possibility of controlling the reactivity of ZnO nanostructures by modifying its surface with gold nanoparticles (Au NPs). By varying the concentration of Au with different wt% (x = 0.01, 0.05, 0.08, 1 and 2), we have synthesized a series of (ZnO/Aux) nanocomposites (NCs). A thorough investigation of the photocatalytic performance of different wt% of Au NPs on ZnO nanosurface has been carried out. It was observed that ZnO/Au0.08 nanocomposite showed the highest photocatalytic activity among all concentrations of Au on the ZnO surface, which degrades the dye concentration within 2 minutes of visible light exposure. It was further revealed that with an increase in the size of plasmonic nanoparticles beyond 0.08%, the accessible surface area of the Au nanoparticle decreases. The photon absorption capacity of Au nanoparticle decreases beyond 0.08% resulting in a decrease in electron transfer rate from Au to ZnO and a decrease of photocatalytic activity. Background: Due to the industrialization process, most of the toxic materials go into the water bodies, affecting the water and our ecological system. The conventional techniques to remove dyes are expensive and inefficient. Recently, heterogeneous semiconductor materials like TiO2 and ZnO have been regarded as potential candidates for the removal of dye from the water system. Objective: To investigate the photocatalytic performance of different wt% of Au NPs on ZnO nanosurface and the effect of the size of Au NPs for photocatalytic performance in the degradation process. Methods: A facile microwave method has been adopted for the synthesis of ZnO nanostructure followed by a reduction of gold salt in the presence of ZnO nanostructure to form the composite. Results: ZnO/Au0.08 nanocomposite showed the highest photocatalytic activity which degrades the dye concentration within 2 minutes of visible light exposure. The schematic mechanism of electron transfer rate was discussed. Conclusion: Raspberry shaped ZnO nanoparticles modified with different percentages of Au NPs showed good photocatalytic behavior in the degradation of dye molecules. The synergetic effect of unique morphology of ZnO and well anchored Au nanostructures plays a crucial role.

A renewable photocatalytic system with dramatic photocatalytic activity for H2 evolution and constant light energy utilization: Eosin Y sensitized ZnWO4 nanoplates loaded with CuO nanoparticles

2021 ◽  
Author(s):  
Xiaoluo Bao ◽  
Xiaokun Wang ◽  
Xiangqing Li ◽  
Lixia Qin ◽  
Taiyang Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Light Intensity ◽  
Incident Light ◽  
Cuo Nanoparticles ◽  
Energy Utilization ◽  
Limited Attention ◽  
Eosin Y ◽  
H2 Evolution ◽  
Incident Light Intensity ◽  
Photocatalytic System

It is necessary for the commercialization of sunlight-driven H2 evolution to develop an efficient photocatalytic system whose energy utilization is independent on incident light intensity. Unfortunately, limited attention has been...

Oxygen defect, electron transfer and photocatalytic activity of Ag/CeO2/SBA-15 hybrid catalysts

2021 ◽  
Author(s):  
L.F. Chen ◽  
U. Arellano ◽  
J.A. Wang ◽  
L.M. Balcázar ◽  
R. Sotelo ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photocatalytic Activity ◽  
Oxygen Defect ◽  
Hybrid Catalysts

Controllable synthesis of perovskite-like PbBiO2Cl hollow microspheres with enhanced photocatalytic activity for antibiotic removal

CrystEngComm ◽  
2017 ◽  
Vol 19 (32) ◽  
pp. 4777-4788 ◽  
Author(s):  
Sheng Yin ◽  
Ting Wu ◽  
Ming Li ◽  
Jun Di ◽  
Mengxia Ji ◽  
...  
Keyword(s):  
Complex System ◽  
Photocatalytic Activity ◽  
Hollow Microspheres ◽  
Polyvinyl Pyrrolidone ◽  
Porous Sphere ◽  
Controllable Synthesis ◽  
System P ◽  
Antibiotic Removal

Novel perovskite-like PbBiO2Cl materials with hollow and porous sphere-like structures were successfully synthesized using a polyvinyl pyrrolidone (PVP) and 1-hexadecyl-3-methylimidazolium chlorine ([C16mim]Cl) complex system.

scholarly journals Microwave treated sol–gel synthesis and characterization of hybrid ZnS–RGO composites for efficient photodegradation of dyes

2017 ◽  
Vol 41 (4) ◽  
pp. 1723-1735 ◽  
Author(s):  
Lellala Kashinath ◽  
Keerthiraj Namratha ◽  
Shivanna Srikantaswamy ◽  
Ajayan Vinu ◽  
Kullaiah Byrappa
Keyword(s):  
Electron Transfer ◽  
Photocatalytic Activity ◽  
Sol Gel ◽  
Charge Recombination ◽  
Synthesis And Characterization ◽  
Excellent Photocatalytic Activity ◽  
Sol Gel Synthesis

Excellent photocatalytic activity by highly photo-responsive electron transfer from ZnS–RGO, and RGO acts as an electron reservoir and effectively suppresses charge recombination.

Balancing electron transfer rate and driving force for efficient photocatalytic hydrogen production in CdSe/CdS nanorod–[NiFe] hydrogenase assemblies

2017 ◽  
Vol 10 (10) ◽  
pp. 2245-2255 ◽  
Author(s):  
Bryant Chica ◽  
Chang-Hao Wu ◽  
Yuhgene Liu ◽  
Michael W. W. Adams ◽  
Tianquan Lian ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Hydrogen Production ◽  
Driving Force ◽  
Transfer Rate ◽  
Pyrococcus Furiosus ◽  
Electron Transfer Rate ◽  
Photocatalytic Hydrogen Production ◽  
Photocatalytic System

We describe a hybrid photocatalytic system for hydrogen production consisting of nanocrystalline CdSe/CdS dot-in-rod (DIR) structures coupled to [NiFe] soluble hydrogenase I (SHI) fromPyrococcus furiosus.

The oxygen reduction reaction of two electron transfer of nitrogen-doped carbon in the electro-Fenton system

2020 ◽  
Vol 44 (38) ◽  
pp. 16584-16593
Author(s):  
Jiayi Feng ◽  
Yonggang Zhang
Keyword(s):  
Electron Transfer ◽  
Oxygen Reduction Reaction ◽  
Cathode Material ◽  
Degradation Mechanism ◽  
Reduction Reaction ◽  
Nitrogen Doped ◽  
System P ◽  
Nitrogen Doped Carbon ◽  
Fenton System ◽  
Ti Mesh

Degradation mechanism of ORR for the NGO-Ti mesh cathode material in the EF process.

scholarly journals On Photocatalytic Activity of Systems of Titania/(Fe (II, III))-Type in Aqueous Suspensions

2018 ◽  
Vol 17 (6) ◽  
pp. 521-527
Author(s):  
V. A. Gorbunova ◽  
L. M. Sliapniova
Keyword(s):  
Photocatalytic Activity ◽  
Oxidation Reaction ◽  
High Photocatalytic Activity ◽  
Organic Dye ◽  
Iron Ions ◽  
Physico Chemical ◽  
Photocatalytic System ◽  
Initial Suspension ◽  
Hydrolysis Of ◽  
Chemical Water

. The photocatalytic activity of three systems, promising for chemical water purification technologies, was experimentally compared, based on a combination of titanium dioxide/(Fe(II, III)), applying to the model oxidation reaction of methylorange organic dye in an aqueous medium. Herewith the cases of photocatalytic systems were investigated, which are based on: a) titania hydrosol obtained by hydrolysis of titanium isobutylate; b) a similar hydrosol with addition of Fe(III) ions; c) suspension of ilmenite powder based on FeTiO3. As a result of the investigation, the increase of the rate of destruction of methylorange by more than two times was found in the system with the introduction of a small amount of iron ions into initial suspension of the TiO2 hydrosol (at the obtaining a medium with the Fe3+ concentration up to 3.7 × 10–5 M). In the photocatalytic system, based on the suspension of pretreated (with suphation and calcination) ilmenite powder, enough high photocatalytic activity (the degree of methylorange decomposition up to 77 %) was measured but at a higher exposure than for the case of systems based on the TiO2 hydrosol. For the photocatalytic systems of the type being investigated, a possible mechanism of increasing their oxidative activity was briefly considered, which requires an additional physico-chemical analysis.

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