Theoretical Study on the Anisotropic Photo-Induced Carrier Mobilities in Layered Double Hydroxides-Based Photocatalysts

2021 ◽  
Author(s):  
Zi-Ru Chen ◽  
Yu-Quan Zhu ◽  
Si-Min Xu ◽  
Yufei Zhao ◽  
Qian Peng ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Layered Double Hydroxides ◽  
Reaction Rate ◽  
Theoretical Study ◽  
Electron Hole ◽  
Photocatalysis Reaction ◽  
Double Hydroxides ◽  
Transportation Routes ◽  
Hole Recombination

In order to suppress the unwanted photo-induced electron-hole recombination which restricts the quantum efficiency and reaction rate of photocatalysis reaction, the transportation routes of electron and hole in photocatalyst should...

Theoretical Study of the Catalytic Performance of Activated Layered Double Hydroxides in the Cyanoethylation of Alcohols

2019 ◽  
Vol 123 (14) ◽  
pp. 8777-8784 ◽  
Author(s):  
Cristina Cuautli ◽  
Jaime S. Valente ◽  
J. C. Conesa ◽  
M. Verónica Ganduglia-Pirovano ◽  
Joel Ireta
Keyword(s):  
Layered Double Hydroxides ◽  
Theoretical Study ◽  
Catalytic Performance ◽  
Double Hydroxides

scholarly journals Theoretical study and analysis of o-nitrophenol adsorption using layered double hydroxides containing Ca-Al, Ni-Al and Zn-Al

2021 ◽  
Author(s):  
Lotfi Sellaoui ◽  
Amira Yazidi ◽  
Jawad Ali ◽  
Guilherme Luiz Dotto ◽  
Adrian Bonilla-Petriciolet ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Theoretical Study ◽  
Double Hydroxides

Kinetics and Thermodynamics Study of Thiosulfate Removal from Water by Calcined MgAl-CO3 Layered Double Hydroxides

2011 ◽  
Vol 396-398 ◽  
pp. 880-885
Author(s):  
Cui Yu Geng ◽  
Xiao Yu ◽  
Zheng Chang ◽  
Xiao Dong Lei ◽  
Xiao Ming Sun ◽  
...  
Keyword(s):  
Memory Effect ◽  
Layered Double Hydroxides ◽  
Reaction Rate ◽  
Langmuir Equation ◽  
Contaminated Water ◽  
Equilibrium Isotherm ◽  
Kinetics And Thermodynamics ◽  
Pseudo Second Order ◽  
Uptake Process ◽  
Double Hydroxides

Layered double hydroxides (LDHs) are potential scavengers for anionic contaminants due to their “memory effect”. Here we report the removal of thiosulfate anion from contaminated water by calcined MgAl–CO3 LDH (CLDH). The results indicate that CLDH exhibits a good performance in adsorption of thiosulfate.We studied the kinetics and thermodynamics of adsorption of thiosulfate from water. The equilibrium isotherm showed that the uptake of thiosulfate anion well agrees with the Langmuir equation, the positive value of △HӨ demonstrates the endothermic feature of the adsorption, the pseudo-second order kinetics model can be uItalic textsed to describe the uptake process and the value of Ea was calculated to be 75.898 kJ/mol. Our results suggest that the process of thiosulfate uptaking was controlled by the reaction rate of thiosulfate with the CLDH rather than diffusion.

scholarly journals Electrochemical Oxidation of 4-Chlorophenol Over a Carbon Paste Electrode Modified with ZnAl Layered Double Hydroxides

2017 ◽  
Vol 58 (3) ◽  
Author(s):  
Daniel Hernández-Fuerte ◽  
Manuel Palomar-Pardavé ◽  
Teresa De Jesús Licona-Sánchez ◽  
Mario Romero- Romo ◽  
Jaime S. Valente
Keyword(s):  
Electrochemical Oxidation ◽  
Layered Double Hydroxides ◽  
Carbon Paste Electrode ◽  
Reaction Rate ◽  
Carbon Paste ◽  
Ph Values ◽  
Electro Oxidation ◽  
Double Hydroxides ◽  
Paste Electrode ◽  
Oxidation Reaction Rate

A study is presented on the electrochemical oxidation of 4-chlorophenol (4cp) in aqueous solution using a bare carbon paste electrode, CPE, and another one that was modified with ZnAl layered double hydroxides (CPE/ZnAl-LDH). The electro-oxidation was effected at pH values ranging from 3 up to 11. It was found through cyclic voltammetry that this process was irreversible, namely, there were no reduction peaks, and that depending on the nature of the electrode, the anodic current was limited either by adsorption (CPE) or diffusion (CPE/ZnAl-LDH). The energy required and the oxidation reaction rate depended on the pH and on the nature of the electrode, such that the greater rates were obtained when the CPE/ZnAl-LDH electrode and acid pHs were used.

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