Electrodeless Determination of the Trap Density, Decay Kinetics, and Charge Separation Efficiency of Dye-Sensitized Nanocrystalline TiO2

2004 ◽  
Vol 126 (24) ◽  
pp. 7608-7618 ◽  
Author(s):  
Jessica E. Kroeze ◽  
Tom J. Savenije ◽  
John M. Warman
Keyword(s):  
Charge Separation ◽  
Separation Efficiency ◽  
Trap Density ◽  
Decay Kinetics ◽  
Nanocrystalline Tio2 ◽  
Dye Sensitized ◽  
Charge Separation Efficiency

Comparison of charge transfer dynamics in polypyridyl ruthenium sensitizers for solar cells and water splitting systems

2018 ◽  
Vol 20 (11) ◽  
pp. 7710-7720 ◽  
Author(s):  
Iwona Grądzka ◽  
Mateusz Gierszewski ◽  
Jerzy Karolczak ◽  
Marcin Ziółek
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Photoelectrochemical Cells ◽  
Dye Sensitized ◽  
Charge Separation Efficiency ◽  
Charge Transfer Dynamics ◽  
Sensitized Solar Cells

Standard ruthenium components of dye-sensitized solar cells (sensitizer N719) and dye-sensitized photoelectrochemical cells (sensitizer RuP) are investigated to compare their photodynamics and charge separation efficiency.

Fabrication of a Facet-Oriented BiVO4 Photoanode by Particle Engineering for Promotion of Charge Separation Efficiency

2021 ◽  
Author(s):  
Boyang Zhang ◽  
Yao Xiang ◽  
Mei Guo ◽  
Jiaming Wang ◽  
Kaiwei Liu ◽  
...  
Keyword(s):  
Charge Separation ◽  
Separation Efficiency ◽  
Particle Engineering ◽  
Charge Separation Efficiency

scholarly journals MXene-Ti3C2 assisted one-step synthesis of carbon-supported TiO2/Bi4NbO8Cl heterostructures for enhanced photocatalytic water decontamination

Nanophotonics ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 2077-2088 ◽  
Author(s):  
Daixun Jiang ◽  
Xun Sun ◽  
Xilu Wu ◽  
Shuai Zhang ◽  
Xiaofei Qu ◽  
...  
Keyword(s):  
Charge Separation ◽  
Photocatalytic Performance ◽  
Separation Efficiency ◽  
Salt Flux ◽  
The Novel ◽  
Water Contaminants ◽  
Photocatalytic Removal ◽  
One Step ◽  
Charge Separation Efficiency ◽  
Perovskite Type

AbstractThe strategy to improve the photocatalytic removal efficiencies towards organic pollutants is still a challenge for the novel Sillen–Aurivillius perovskite type Bi4NbO8Cl. Herein, we report carbon-supported TiO2/Bi4NbO8Cl (C-TiO2/Bi4NbO8Cl) heterostructures with enhanced charge separation efficiency, which were fabricated via molten-salt flux process. The carbon-supported TiO2 particles were derived from MXene Ti3C2 precursors, and attached on plate-like Bi4NbO8Cl, acting as electron-traps to achieve supressed recombination of photo-induced charges. The improved charge separation confers C-TiO2/Bi4NbO8Cl heterostructures superior photocatalytic performance with 53% higher than pristine Bi4NbO8Cl, towards rhodamine B removal with the help of photo-induced holes. Moreover, the C-TiO2/Bi4NbO8Cl heterostructures can be expanded to deal with other water contaminants, such as methyl orange, ciprofloxacin and 2,4-dichlorophenol with 44, 25 and 13% promotion, respectively, and thus the study offers a series of efficient photocatalysts for water purification.

Photoexcited charge carrier dynamics of interconnected TiO2 nanoparticles: evidence of enhancement of charge separation at anatase–rutile particle interfaces

2018 ◽  
Vol 20 (5) ◽  
pp. 3484-3489 ◽  
Author(s):  
Daiki Shingai ◽  
Yusuke Ide ◽  
Woon Yong Sohn ◽  
Kenji Katayama
Keyword(s):  
Charge Carrier ◽  
Tio2 Nanoparticles ◽  
Hydrothermal Treatment ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Carrier Dynamics ◽  
Charge Carrier Dynamics ◽  
Charge Separation Efficiency ◽  
Photoexcited Charge Carrier

Hydrothermal treatment can improve the charge separation efficiency of P25.

scholarly journals Self-template synthesis of ATiO3 (A = Ba, Pb and Sr) perovskites for photocatalytic removal of NO

RSC Advances ◽  
2017 ◽  
Vol 7 (44) ◽  
pp. 27397-27404 ◽  
Author(s):  
Shiyi Cai ◽  
Shan Yu ◽  
Wenchao Wan ◽  
Wen Wen ◽  
Ying Zhou
Keyword(s):  
Template Synthesis ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Light Response ◽  
Photocatalytic Removal ◽  
Charge Separation Efficiency

ATiO3 were synthesized from TiO2 nanosheets dominated with {001} facets, PbTiO3 possesses the highest activity as a result of larger light response and higher charge separation efficiency.

scholarly journals Impact of Nanoparticle Consolidation on Charge Separation Efficiency in Anatase TiO2 Films

2021 ◽  
Vol 9 ◽  
Author(s):  
Karin Rettenmaier ◽  
Thomas Berger
Keyword(s):  
Thermal Annealing ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Internal Surface ◽  
Processing Temperature ◽  
Cyclic Voltammograms ◽  
Internal Surface Area ◽  
Deep Traps ◽  
Charge Separation Efficiency ◽  
The Impact

Mesoporous films and electrodes were prepared from aqueous slurries of isolated anatase TiO2 nanoparticles. The resulting layers were annealed in air at temperatures 100°C ≤ T ≤ 450°C upon preservation of internal surface area, crystallite size and particle size. The impact of processing temperature on charge separation efficiency in nanoparticle electrodes was tracked via photocurrent measurements in the presence of methanol as a hole acceptor. Thermal annealing leads to an increase of the saturated photocurrent and thus of the charge separation efficiency at positive potentials. Furthermore, a shift of capacitive peaks in the cyclic voltammograms of the nanoparticle electrodes points to the modification of the energy of deep traps. Population of these traps triggers recombination possibly due to the action of local electrostatic fields attracting photogenerated holes. Consequently, photocurrents saturate at potentials, at which deep traps are mostly depopulated. Charge separation efficiency was furthermore investigated for nanoparticle films and was tracked via the decomposition of hydrogen peroxide. Our observations evidence an increase of charge separation efficiency upon thermal annealing. The effect of particle consolidation, which we associate with minute atomic rearrangements at particle/particle contacts, is attributed to the energetic modification of deep traps and corresponding modifications of charge transport and recombination, respectively.

A g-C3N4/nanocarbon/ZnIn2S4nanocomposite: an artificial Z-scheme visible-light photocatalytic system using nanocarbon as the electron mediator

2015 ◽  
Vol 51 (96) ◽  
pp. 17144-17147 ◽  
Author(s):  
Fenfen Shi ◽  
Linlin Chen ◽  
Min Chen ◽  
Deli Jiang
Keyword(s):  
Visible Light ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Electron Mediator ◽  
Photocatalytic System ◽  
Charge Separation Efficiency ◽  
Visible Light Photocatalytic

Nanocarbon could be used as an electron mediator to construct a Z-scheme photocatalytic system with enhanced charge separation efficiency.

Enhanced driving force and charge separation efficiency in disordered SnNb x O y : Boosting photocatalytic activity toward water reduction

2017 ◽  
Vol 309 ◽  
pp. 313-320 ◽  
Author(s):  
Shushu Huang ◽  
Junyu Lang ◽  
Chunfang Du ◽  
Fenggang Bian ◽  
Yiguo Su ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Charge Separation ◽  
Driving Force ◽  
Separation Efficiency ◽  
Water Reduction ◽  
Charge Separation Efficiency
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