Photoluminescence study of electron–hole recombination dynamics in the vacuum-deposited SiO2/TiO2 multilayer film with photo-catalytic activity

2003 ◽  
Vol 369 (1-2) ◽  
pp. 225-231 ◽  
Author(s):  
Kiyoshi Miyashita ◽  
Shin-ichi Kuroda ◽  
So Tajima ◽  
Kazuyuki Takehira ◽  
Seiji Tobita ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Multilayer Film ◽  
Electron Hole ◽  
Photoluminescence Study ◽  
Photo Catalytic Activity ◽  
Hole Recombination ◽  
Recombination Dynamics

scholarly journals Synthesis, characterization and photocatalytic activity of mesoporous Na-doped TiO2 nano-powder prepared via a solvent-controlled non-aqueous sol–gel route

RSC Advances ◽  
2017 ◽  
Vol 7 (85) ◽  
pp. 54053-54062 ◽  
Author(s):  
Inderjeet Singh ◽  
Balaji Birajdar
Keyword(s):  
Photocatalytic Activity ◽  
Catalytic Activity ◽  
Surface Area ◽  
Recombination Rate ◽  
Sol Gel ◽  
Electron Hole ◽  
Photo Catalytic Activity ◽  
Nano Powder ◽  
Hole Recombination ◽  
Enhanced Crystallinity

The superior photo-catalytic activity of mesoporous Na doped TiO2 attributed to the combined effect of electron–hole recombination rate, increased surface area and enhanced crystallinity.

Electron–hole recombination dynamics in carbon nanodots

Carbon ◽  
2015 ◽  
Vol 95 ◽  
pp. 659-663 ◽  
Author(s):  
Vanthan Nguyen ◽  
Jinhai Si ◽  
Lihe Yan ◽  
Xun Hou
Keyword(s):  
Carbon Nanodots ◽  
Electron Hole ◽  
Hole Recombination ◽  
Recombination Dynamics

Synthesis of Ag, Pd-Loaded Bi2WO6 and its Photocatalytic Activities

2012 ◽  
Vol 518-523 ◽  
pp. 833-836 ◽  
Author(s):  
Li Guo ◽  
Dan Jun Wang ◽  
Feng Fu ◽  
Xiao Dan Qiang ◽  
Te Xu
Keyword(s):  
Photocatalytic Activity ◽  
Catalytic Activity ◽  
Charge Carrier ◽  
Experimental Results ◽  
Electron Hole ◽  
Photogenerated Charge Carrier ◽  
Photocatalytic Activities ◽  
Pure Bi2wo6 ◽  
Hole Recombination

Ag, Pd loaded Bi2WO6 photocatalyst were prepared via a photoreduction process and characterized with UV-Vis-DRS, XRD and FE-SEM. The photocatalysis experimental results indicated that the photocatalytic activity of Ag-loaded Bi2WO6 was greatly enhanced compared with pure Bi2WO6, and the content of silver has an impact on the catalytic activity of Ag-loaded Bi2WO6 photocatalyst. The loaded Ag and Pd acts as the electron receptor on the surface of Bi2WO6, which inhibits the recombination of photogenerated charge carrier between Ecb to the Evb in the Ag-loaded Bi2WO6. As a result, the reduction of electron-hole recombination decreased, which could significantly improve the photocatalytic activity.

scholarly journals Systematic study of carrier correlations in the electron-hole recombination dynamics of quantum dots

2007 ◽  
Vol 76 (16) ◽  
Author(s):  
T. Berstermann ◽  
T. Auer ◽  
H. Kurtze ◽  
M. Schwab ◽  
D. R. Yakovlev ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Systematic Study ◽  
Electron Hole ◽  
Hole Recombination ◽  
Recombination Dynamics

scholarly journals The Effects of Electronic Impurities and Electron-Hole Recombination Dynamics on Large-Grain Organic-Inorganic Perovskite Photovoltaic Efficiencies

2016 ◽  
Vol 26 (24) ◽  
pp. 4283-4292 ◽  
Author(s):  
Jean-Christophe Blancon ◽  
Wanyi Nie ◽  
Amanda J. Neukirch ◽  
Gautam Gupta ◽  
Sergei Tretiak ◽  
...  
Keyword(s):  
Electron Hole ◽  
Inorganic Perovskite ◽  
Hole Recombination ◽  
Recombination Dynamics ◽  
Perovskite Photovoltaic

Photoluminescence study of electron-hole recombination across the tunable effective gap in GaAs n-i-p-i superlattices

1982 ◽  
Vol 43 (4) ◽  
pp. 291-294 ◽  
Author(s):  
H. Jung ◽  
G.H. Döhler ◽  
H. Künzel ◽  
K. Ploog ◽  
P. Ruden ◽  
...  
Keyword(s):  
Electron Hole ◽  
Photoluminescence Study ◽  
Hole Recombination

Optically Detected Magnetic Resonance and Double Beam Photoluminescence of CdS/HgS/CdS Nanoparticles

1998 ◽  
Vol 536 ◽  
Author(s):  
H. Porteanu ◽  
A. Glozman ◽  
E. Lifshitz ◽  
A. Eychmüller ◽  
H. Weller
Keyword(s):  
Optical Properties ◽  
Magnetic Resonance ◽  
Cds Nanoparticles ◽  
Electron Hole ◽  
Cladding Layer ◽  
Double Beam ◽  
Optically Detected Magnetic Resonance ◽  
Optically Detected ◽  
Cladding Layers ◽  
Hole Recombination

AbstractCdS/HgS/CdS nanoparticles consist of a CdS core, epitaxially covered by one or two monolayers of HgS and additional cladding layers of CdS. The present paper describes our efforts to identify the influence of CdS/HgS/CdS interfaces on the localization of the photogenerated carriers deduced from the magneto-optical properties of the materials. These were investigated by the utilization of optically detected magnetic resonance (ODMR) and double-beam photoluminescence spectroscopy. A photoluminescence (PL) spectrum of the studied material, consists of a dominant exciton located at the HgS layer, and additional non-excitonic band, presumably corresponding to the recombination of trapped carriers at the interface. The latter band can be attenuated using an additional red excitation. The ODMR measurements show the existence of two kinds of electron-hole recombination. These electron-hole pairs maybe trapped either at a twin packing of a CdS/HgS interface, or at an edge dislocation of an epitaxial HgS or a CdS cladding layer.

Pre-Industrial Experience in Solar Photocatalytic Mineralization of Real Wastewaters. Application to Pesticide Container Recycling

1999 ◽  
Vol 40 (4-5) ◽  
pp. 123-130 ◽  
Author(s):  
S. Malato ◽  
J. Blanco ◽  
C. Richter ◽  
B. Milow ◽  
M. I. Maldonado
Keyword(s):  
Organic Contaminants ◽  
Toxic Waste ◽  
Experimental Plant ◽  
Electron Hole ◽  
Particulate Suspensions ◽  
Photocatalytic System ◽  
Commercial Pesticide ◽  
Pesticide Container ◽  
By Products ◽  
Hole Recombination

Particulate suspensions of TiO2 irradiated with natural solar tight in a large experimental plant catalyse the oxidation of organic contaminants. The problem in using TiO2 as a photocatalyst is electron/hole recombination. One strategy for inhibiting e−/h+ recombination is to add other (irreversible) electron acceptors to the reaction. In many highly toxic waste waters where degradation of organic pollutants is the major concern, the addition of an inorganic anion to enhance the organic degradation rate may be justified. For better results, these additives should fulfil the following criteria: dissociate into harmless by-products and lead to the formation of ·OH or other oxidising agents. In this paper, we attempt to demonstrate the optimum conditions for the treatment of commercial pesticide rinsates found in the wastewater produced by a pesticide container recycling plant. The experiments were performed in one of the pilot plants of the largest solar photocatalytic system in Europe, the Detoxification Plants of the Plataforma Solar de Almería (PSA), in Spain. After testing ten different commercial pesticides, results show that peroxydisulphate enhances the photocatalytic miniralization of all of them. This study is part of an extensive project focused on the design of a solar photocatalytic plant for decontamination of agricultural rinsates in Almería (Spain).

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