scholarly journals Charge carrier dynamics and photocatalytic behavior of TiO2 nanopowders submitted to hydrothermal or conventional heat treatment

RSC Advances ◽  
2015 ◽  
Vol 5 (86) ◽  
pp. 70536-70545 ◽  
Author(s):  
A. O. T. Patrocinio ◽  
J. Schneider ◽  
M. D. França ◽  
L. M. Santos ◽  
B. P. Caixeta ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Photocatalytic Activity ◽  
Transient Absorption ◽  
Carrier Dynamics ◽  
Transient Absorption Spectroscopy ◽  
Electron Hole ◽  
Charge Carrier Dynamics ◽  
Conventional Heat Treatment ◽  
Tio2 Nanopowders

The role of thermal treatment on the electron/hole dynamics and on the photocatalytic activity of TiO2 is investigated by transient absorption spectroscopy.

scholarly journals Deciphering the role of quantum dot size in the ultrafast charge carrier dynamics at the perovskite–quantum dot interface

2020 ◽  
Vol 8 (42) ◽  
pp. 14834-14844
Author(s):  
Piotr Piatkowski ◽  
Sofia Masi ◽  
Pavel Galar ◽  
Mario Gutiérrez ◽  
Thi Tuyen Ngo ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Charge Carrier ◽  
Rate Constants ◽  
Transient Absorption ◽  
Carrier Dynamics ◽  
Carrier Transfer ◽  
Charge Carrier Dynamics ◽  
Conduction Bands

Charge-carrier transfer (CT) from the perovskite host to PbS QDs were studied using fs-transient absorption and THz techniques. The CT rate constants increase with the size of QDs due to a change in the position of valence and conduction bands in PbS QDs.

scholarly journals Ultrafast photoinduced dynamics of the organolead trihalide perovskite CH3NH3PbI3 on mesoporous TiO2 scaffolds in the 320–920 nm range

2015 ◽  
Vol 17 (29) ◽  
pp. 19238-19246 ◽  
Author(s):  
Oliver Flender ◽  
Johannes R. Klein ◽  
Thomas Lenzer ◽  
Kawon Oum
Keyword(s):  
Charge Carrier ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Carrier Dynamics ◽  
Mesoporous Tio2 ◽  
Transient Absorption Spectroscopy ◽  
Charge Carrier Dynamics ◽  
Nm Range

Ultrafast broadband transient absorption spectroscopy elucidates charge carrier dynamics in the perovskite CH3NH3PbI3.

scholarly journals Charge Carrier Dynamics of Photoexcited Co3O4 in Methanol: Extending High Harmonic Transient Absorption Spectroscopy to Liquid Environments

Nano Letters ◽  
2014 ◽  
Vol 14 (10) ◽  
pp. 5883-5890 ◽  
Author(s):  
L. Robert Baker ◽  
Chang-Ming Jiang ◽  
Stephen T. Kelly ◽  
J. Matthew Lucas ◽  
Josh Vura-Weis ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
High Harmonic ◽  
Carrier Dynamics ◽  
Transient Absorption Spectroscopy ◽  
Charge Carrier Dynamics

Revealing the role of the Rh valence state, La doping level and Ru cocatalyst in determining the H2 evolution efficiency in doped SrTiO3 photocatalysts

2019 ◽  
Vol 3 (1) ◽  
pp. 208-218 ◽  
Author(s):  
Dharmapura H. K. Murthy ◽  
Hiroyuki Matsuzaki ◽  
Qian Wang ◽  
Yohichi Suzuki ◽  
Kazuhiko Seki ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Valence State ◽  
Doping Level ◽  
Transient Absorption ◽  
Carrier Dynamics ◽  
Transient Absorption Spectroscopy ◽  
Spectroscopy Study ◽  
H2 Evolution ◽  
La Doping

A transient absorption spectroscopy study is conducted to correlate carrier dynamics with photocatalytic H2 evolution efficiency in the La/Rh doped SrTiO3 photocatalyst.

scholarly journals Time-resolved terahertz spectroscopy reveals the influence of charged sensitizing quantum dots on the electron dynamics in ZnO

2017 ◽  
Vol 19 (8) ◽  
pp. 6006-6012 ◽  
Author(s):  
Sesha Bamini N. ◽  
Hynek Němec ◽  
Karel Žídek ◽  
Mohamed Abdellah ◽  
Mohammed J. Al-Marri ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Charge Carrier ◽  
Transient Absorption ◽  
Terahertz Spectroscopy ◽  
Carrier Dynamics ◽  
Transient Absorption Spectroscopy ◽  
Cdse Quantum Dots ◽  
Electron Dynamics ◽  
Time Resolved ◽  
Charge Carrier Dynamics

Photoinitiated charge carrier dynamics in ZnO nanoparticles sensitized by CdSe quantum dots is studied using transient absorption spectroscopy and time-resolved terahertz spectroscopy.

scholarly journals Origin of the overall water splitting activity of Ta3N5 revealed by ultrafast transient absorption spectroscopy

2019 ◽  
Vol 10 (20) ◽  
pp. 5353-5362 ◽  
Author(s):  
Dharmapura H. K. Murthy ◽  
Hiroyuki Matsuzaki ◽  
Zheng Wang ◽  
Yohichi Suzuki ◽  
Takashi Hisatomi ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Water Splitting ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Carrier Dynamics ◽  
Transient Absorption Spectroscopy ◽  
Spectroscopy Study ◽  
Overall Water Splitting ◽  
Charge Carrier Dynamics ◽  
Ultrafast Transient Absorption

A detailed transient absorption spectroscopy study efficiently correlates charge carrier dynamics with the overall water splitting efficiency in Ta3N5 photocatalyst.

scholarly journals Charge carrier dynamics of methylammonium lead iodide: from PbI2-rich to low-dimensional broadly emitting perovskites

2016 ◽  
Vol 18 (16) ◽  
pp. 10800-10808 ◽  
Author(s):  
Johannes R. Klein ◽  
Oliver Flender ◽  
Mirko Scholz ◽  
Kawon Oum ◽  
Thomas Lenzer
Keyword(s):  
Charge Carrier ◽  
Transient Absorption ◽  
Carrier Dynamics ◽  
Transient Absorption Spectroscopy ◽  
Lead Iodide ◽  
Charge Carrier Dynamics ◽  
Carrier Recombination ◽  
Recombination Rate Constant ◽  
Low Dimensional ◽  
Methylammonium Lead Iodide

Broadband transient absorption spectroscopy reveals an increased carrier recombination rate constant of low-dimensional perovskites.

Transient Absorption Studies on Nanostructured Materials and Composites: Towards the Development of New Photocatalytic Systems

2018 ◽  
Vol 232 (9-11) ◽  
pp. 1469-1493 ◽  
Author(s):  
Christoph Haisch ◽  
Barbara N. Nunes ◽  
Jenny Schneider ◽  
Detlef Bahnemann ◽  
Antonio Otavio T. Patrocinio
Keyword(s):  
Transient Absorption ◽  
Review Paper ◽  
High Photocatalytic Activity ◽  
Carrier Dynamics ◽  
Transient Absorption Spectroscopy ◽  
Sustainable Technologies ◽  
Charge Carrier Dynamics ◽  
Absorption Studies ◽  
Time Regime ◽  
Photocatalytic Processes

AbstractBeing part of the development of environmentally clean and safe sustainable technologies photocatalysis is attracting increasing attention. During the last decade, great attention has been paid to the synthesis of different photocatalysts possessing high photocatalytic activity, whereas fundamental studies concerning the underlying photocatalytic processes have rarely been executed. The knowledge of these processes is, however, of utmost importance for the understanding of the reaction mechanism and thus for a better design of photocatalytic systems. The transient absorption spectroscopy (TAS) is one widely used method to study such fundamental processes. The present review paper focuses on the application of TAS in the UV-Vis-IR regions to investigate the charge carrier dynamics in ultrafast and nano-to-millisecond time regime. Hereby, the photo induced processes occurring in different materials will be discussed. Moreover, further attention is also paid to nanocomposite-based systems, in which different materials are used concomitantly to promote more efficient photocatalytic processes.

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