Kinetics of in situ desorption of dye molecules on sensitized TiO2 nanoparticles in a high concentration solution: ion parasitic adsorption process and mass reference

2018 ◽  
Vol 20 (32) ◽  
pp. 20856-20862 ◽  
Author(s):  
Weiqing Liu ◽  
Fei Liu ◽  
Yujing Liu ◽  
Yuqian Ai
Keyword(s):  
Tio2 Nanoparticles ◽  
Adsorption Process ◽  
Mass Change ◽  
Dye Molecules ◽  
High Concentration ◽  
Desorption Process ◽  
Dye Sensitized ◽  
High Concentration Solution ◽  
Kinetics Of

This paper applies a method to study the in situ mass change responses on dye-sensitized TiO2 films in different potential ranges, and explore the dye desorption process in depth and in detail.

scholarly journals In Situ Mapping of the Molecular Arrangement of Amphiphilic Dye Molecules at the TiO2 Surface of Dye-Sensitized Solar Cells

2015 ◽  
Vol 7 (20) ◽  
pp. 10834-10842 ◽  
Author(s):  
Kislon Voïtchovsky ◽  
Negar Ashari-Astani ◽  
Ivano Tavernelli ◽  
Nicolas Tétreault ◽  
Ursula Rothlisberger ◽  
...  
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Tio2 Surface ◽  
Dye Molecules ◽  
Dye Sensitized ◽  
Molecular Arrangement ◽  
Sensitized Solar Cells

scholarly journals Kinetics of water sorption of damaged bean grains: Thermodynamic properties

2017 ◽  
Vol 21 (8) ◽  
pp. 556-561 ◽  
Author(s):  
Paulo C. Corrêa ◽  
Fernanda M. Baptestini ◽  
Jaime D. B. Vanegas ◽  
Rafael Leite ◽  
Fernando M. Botelho ◽  
...  
Keyword(s):  
Thermodynamic Properties ◽  
Moisture Content ◽  
Adsorption Process ◽  
Initial Moisture Content ◽  
Mechanical Damage ◽  
Climatic Chamber ◽  
Desorption Process ◽  
Adsorption Sites ◽  
Differential Enthalpy ◽  
Kinetics Of

ABSTRACT This study aims to determine the thermodynamic properties of damaged beans. Grains with initial moisture content of 53.85% (d.b.) were used. A part of the grains was used to obtain the desorption isotherms, while another part was subjected to drying until a moisture content of 5.26% (d.b.) was achieved; therefore, it was subjected to the adsorption process. To induce damage, a Stein breakage tester was used. To obtain the equilibrium moisture content, grains were placed in a climatic chamber whose temperatures were 20, 30, 40, and 50 ± 1 °C combined with a relative humidity of 30, 40, 50, 70, and 90 ± 3%. Although in the desorption process, damaged grains had a lower differential enthalpy compared with the control, the reverse behavior was observed in the adsorption process. Mechanical damage caused the formation of a greater number of available adsorption sites, resulting in higher differential entropy values in adsorption and lower values in desorption compared with the control. The mechanical damage had no effect on the Gibbs free energy.

Mechanisms and Kinetics of Electrochemical Intercalation of Oxygen into Nd2NiO4+δ

1998 ◽  
Vol 548 ◽  
Author(s):  
H. Fritze ◽  
H. L. Tuller ◽  
J. Berthold ◽  
B. Schultrich
Keyword(s):  
Quartz Crystal ◽  
Transport Model ◽  
Compositional Analysis ◽  
Mass Change ◽  
Oxygen Stoichiometry ◽  
Excess Oxygen ◽  
Cyclic Voltammograms ◽  
Electrochemical Intercalation ◽  
Kinetics Of

ABSTRACTOverstoichiometric insertion of oxygen into thin films of Nd2NiO4+δwas performed electrochemically at room temperature (RT) in order to obtain an in-situ compositional analysis of the process. Thin Nd2NiO4+δlayers were deposited onto resonators of a Quartz Crystal Microbalance (QCM) by Pulsed Laser Deposition (PLD). Cyclic voltammograms showed oxidation and reduction peaks typical for these oxides. The change in oxygen stoichiometry was determined by in-situ QCM measurements during potential step experiments. The resulting maximum mass change was on the order of 50 ng and corresponded to a maximum excess oxygen content of δ = 0.12 in Nd2NiO4+δ. The time dependence of the mass change was described by a transport model which leads to oxygen diffusion coefficients in the range from 2.10−12 to 10−11 cm2/s depending on δ and the direction of the reaction.

scholarly journals In situ Raman study of the photoinduced behavior of dye molecules on TiO2(hkl) single crystal surfaces

2020 ◽  
Vol 11 (25) ◽  
pp. 6431-6435 ◽  
Author(s):  
Sheng-Pei Zhang ◽  
Jia-Sheng Lin ◽  
Rong-Kun Lin ◽  
Petar M. Radjenovic ◽  
Wei-Min Yang ◽  
...  
Keyword(s):  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Dye Molecules ◽  
Crystal Surfaces ◽  
Single Crystal Surfaces ◽  
Dye Sensitized ◽  
In Situ Raman ◽  
Raman Study ◽  
Sensitized Solar Cells

In dye-sensitized solar cells (DSSCs), the TiO2/dye interface significantly affects photovoltaic performance.

In Situ Observation of Diamagnetic Fluid Flow in High Magnetic Fields

2014 ◽  
Vol 616 ◽  
pp. 188-193 ◽  
Author(s):  
Yan Wang ◽  
Noriyuki Hirota ◽  
Hidehiko Okada ◽  
Tie Liu ◽  
Qiang Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Fluid Flow ◽  
Magnetic Fields ◽  
Magnetic Force ◽  
Potassium Sulfate ◽  
High Magnetic Fields ◽  
High Concentration ◽  
Sample Dissolution ◽  
High Concentration Solution

The effect of high magnetic field on diamagnetic fluid flow has been studied by in-situ optical observation. The Schlieren optics utilizable under high magnetic fields was developed to carry out in-situ observation of the behavior of feeble magnetic fluids. Using a crystal of the diamagnetic aluminum potassium sulfate dodecahydrate, the behavior of the downward flow of high concentration solution in the sample dissolution process was observed. It was found that the direction of diamagnetic fluid flow was changed under spatially varied magnetic field. This phenomenon was understood qualitatively by considering the magnetic force acting on the high concentration solution and the surrounding solution.

The initial adsorption process of benzene in double-walled carbon nanotubes studied by in situ solid-state NMR

RSC Advances ◽  
2015 ◽  
Vol 5 (85) ◽  
pp. 69848-69853 ◽  
Author(s):  
Wanling Shen ◽  
Xin Li ◽  
Hongbo Zhang
Keyword(s):  
Carbon Nanotubes ◽  
Solid State ◽  
Adsorption Process ◽  
Initial Adsorption ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
First Time ◽  
Kinetics Of ◽  
C Nmr

Adsorption kinetics of benzene in double-walled carbon nanotubes at the very earliest stages were directly monitored for the first time by using in situ solid-state 13C NMR.

In situ study of electron beam-induced chemical vapor deposition of Au in an environmental TEM

1995 ◽  
Vol 53 ◽  
pp. 256-257
Author(s):  
J. Drucker ◽  
R. Sharma ◽  
J. Kouvetakis ◽  
K.H.J. Weiss
Keyword(s):  
Electron Beam ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Quantum Effect ◽  
Line Drawing ◽  
Chemical Vapor ◽  
Environmental Cell ◽  
Engineering Changes ◽  
Kinetics Of

Patterning of metals is a key element in the fabrication of integrated microelectronics. For circuit repair and engineering changes constructive lithography, writing techniques, based on electron, ion or photon beam-induced decomposition of precursor molecule and its deposition on top of a structure have gained wide acceptance Recently, scanning probe techniques have been used for line drawing and wire growth of W on a silicon substrate for quantum effect devices. The kinetics of electron beam induced W deposition from WF6 gas has been studied by adsorbing the gas on SiO2 surface and measuring the growth in a TEM for various exposure times. Our environmental cell allows us to control not only electron exposure time but also the gas pressure flow and the temperature. We have studied the growth kinetics of Au Chemical vapor deposition (CVD), in situ, at different temperatures with/without the electron beam on highly clean Si surfaces in an environmental cell fitted inside a TEM column.

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