Electron–Hole Pair Generation of the Visible-Light Plasmonic Photocatalyst Ag@AgCl: Enhanced Optical Transitions Involving Midgap Defect States of AgCl

2014 ◽  
Vol 118 (23) ◽  
pp. 12133-12140 ◽  
Author(s):  
Xiangchao Ma ◽  
Ying Dai ◽  
Lin Yu ◽  
Zaizhu Lou ◽  
Baibiao Huang ◽  
...  
Keyword(s):  
Visible Light ◽  
Hole Pair ◽  
Optical Transitions ◽  
Defect States ◽  
Electron Hole ◽  
Plasmonic Photocatalyst ◽  
Electron Hole Pair ◽  
Pair Generation

Electron-hole pair generation energy in gallium arsenide byxand γ photons

2002 ◽  
Vol 92 (3) ◽  
pp. 1248-1255 ◽  
Author(s):  
Giuseppe Bertuccio ◽  
Diego Maiocchi
Keyword(s):  
Gallium Arsenide ◽  
Hole Pair ◽  
Electron Hole ◽  
Electron Hole Pair ◽  
Pair Generation

Energy for Electron-Hole Pair Generation in Silicon byαParticles

1963 ◽  
Vol 131 (1) ◽  
pp. 134-136 ◽  
Author(s):  
G. Fabri ◽  
E. Gatti ◽  
V. Svelto
Keyword(s):  
Hole Pair ◽  
Electron Hole ◽  
Electron Hole Pair ◽  
Pair Generation

scholarly journals Experimental Study of CO2 Conversion into Methanol by Synthesized Photocatalyst (ZnFe2O4/TiO2) Using Visible Light as an Energy Source

Catalysts ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 163 ◽  
Author(s):  
Numair Manzoor ◽  
Muhammad Sadiq ◽  
Muhammad Naqvi ◽  
Umair Sikandar ◽  
Salman Raza Naqvi
Keyword(s):  
Titanium Dioxide ◽  
Global Warming ◽  
Visible Light ◽  
Band Gap ◽  
Zinc Ferrite ◽  
Maximum Yield ◽  
Hole Pair ◽  
Electron Hole ◽  
Bet Analysis ◽  
Electron Hole Pair

Ozone layer depletion is a serious threat due to the extensive release of greenhouse gases. The emission of carbon dioxide (CO2) from fossil fuel combustion is a major reason for global warming. Energy demands and climate change are coupled with each other. CO2is a major gas contributing to global warming; hence, the conversion of CO2 into useful products such as methanol, formic acid, formaldehyde, etc., under visible light is an attractive topic. Challenges associated with the current research include synthesizing a photocatalyst that is driven by visible light with a narrow band gap range between 2.5 and 3.0 eV, the separation of a mixed end product, and the two to three times faster recombination rate of an electron–hole pair compared with separation over yield. The purpose of the current research is to convert CO2 into useful fuel i.e., methanol; the current study focuses on the photocatalytic reduction of CO2into a useful product. This research is based on the profound analysis of published work, which allows the selection of appropriate methods and material for this research. In this study, zinc ferrite (ZnFe2O4) is synthesized via the modified sol–gel method and coupled with titanium dioxide (TiO2). Thereafter, the catalyst is characterized by Fourier transform infrared (FTIR), FE-SEM, UV–Vis, and XRD characterization techniques. UV–Vis illustrates that the synthesized catalyst has a low band gap and utilizes a major portion of visible light irradiation. The XRD pattern was confirmed by the formation of the desired catalyst. FE-SEM illustrated that the size of the catalyst ranges from 50 to 500 nm and BET analysis determined the surface area, which was 2.213 and 6.453 m2/g for ZnFe2O4 and ZnFe2O4/TiO2, respectively. The continuous gas flow photoreactor was used to study the activity of the synthesized catalyst, while titanium dioxide (TiO2) has been coupled with zinc ferrite (ZnFe2O4) under visible light in order to obtain the maximum yield of methanol as a single product and simultaneously avoid the conversion of CO2 into multiple products. The performance of ZnFe2O4/TiO2was mainly assessed through methanol yield with a variable amount of TiO2 over ZnFe2O4 (1:1, 1:2, 2:1, 1:3, and 3:1). The synthesized catalyst recycling ability has been tested up to five cycles. Finally, we concluded that the optimum conditions for maximum yield were found to be a calcination temperature of ZnFe2O4at 900 °C, and optimum yield was at a 1:1 w/w coupling ratio of ZnFe2O4/TiO2. It was observed that due to the enhancement in the electron–hole pair lifetime, the methanol yield at 141.22 μmol/gcat·h over ZnFe2O4/TiO2was found to be 7% higher than the earlier reported data.

scholarly journals A New Concept of Multi Electron-Hole Pair Generation using Dark-Bright Soliton Conversion Control

2011 ◽  
Vol 8 ◽  
pp. 483-486
Author(s):  
S. Punthawanunt ◽  
C. Teeka ◽  
R. Jomtarak ◽  
S. Mitatha ◽  
J. Ali ◽  
...  
Keyword(s):  
Hole Pair ◽  
Bright Soliton ◽  
Electron Hole ◽  
Electron Hole Pair ◽  
Pair Generation

Electron-hole—pair generation and hysteresis in semiconductors

1983 ◽  
Vol 27 (8) ◽  
pp. 4779-4787 ◽  
Author(s):  
A. Elçi ◽  
M. O. Scully ◽  
J. M. O'Hare
Keyword(s):  
Hole Pair ◽  
Electron Hole ◽  
Electron Hole Pair ◽  
Pair Generation

Preparation and Characterization of Ag/TiO2-xNx Nanoparticles

2007 ◽  
Vol 534-536 ◽  
pp. 105-108
Author(s):  
Zhong Qing Liu ◽  
Zheng Hua Li ◽  
Yan Ping Zhou ◽  
Chang Chun Ge
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Ultraviolet Light ◽  
Hole Pair ◽  
Electron Hole ◽  
Photoexcited Electron ◽  
Photochemical Deposition ◽  
Electron Hole Pair

The Ag/TiO2-xNx nanoparticles were synthesized by photochemical deposition with irradiation of visible light in a TiO2-XNX suspension system. The prepared products were characterized by means of XRD, Uv-vis, and FEM. Its photocatalytic activity was investigated by the decomposition of methylene blue (MB) solution under illumination of visible and ultraviolet light, respectively. Compared to TiO2-xNx, the photocatalytic activity of as–prepared Ag/TiO2-xNx is obviously enhanced due to the decreasing recombination of a photoexcited electron-hole pair. The mechanism in which photocatalytic activity is enhanced is discussed in detail.

Single Electron-Hole Pair Generation using Dark-Bright Solitons Conversion Control

2011 ◽  
Author(s):  
R. Jomtarak ◽  
C. Teeka ◽  
P. P. Yupapin ◽  
J. Ali ◽  
Abdul Manaf Hashim ◽  
...  
Keyword(s):  
Hole Pair ◽  
Single Electron ◽  
Electron Hole ◽  
Bright Solitons ◽  
Electron Hole Pair ◽  
Pair Generation

Construction of a novel Cu2(OH)3F/g-C3N4 heterojunction as a high-activity Fenton-like catalyst driven by visible light

2021 ◽  
Author(s):  
Lifen Wang ◽  
Yinjun Lin ◽  
Wenting Guo ◽  
Yuanyuan Yang ◽  
Ruiqin Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
High Activity ◽  
Photogenerated Electron ◽  
Hole Pair ◽  
Competitive Effect ◽  
Electron Hole ◽  
Fenton Reagents ◽  
Pair Separation ◽  
Electron Hole Pair

Inhibiting the competitive effect of O2 in copper-based Fenton reagents and improving the photogenerated electron–hole pair separation of g-C3N4 are the focus of current research.

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