Dehydration and Dehydroxylation of Layered Double Hydroxides: New Insights from Solid-State NMR and FT-IR Studies of Deuterated Samples

2015 ◽  
Vol 119 (22) ◽  
pp. 12325-12334 ◽  
Author(s):  
Guiyun Yu ◽  
Yahui Zhou ◽  
Rong Yang ◽  
Meng Wang ◽  
Li Shen ◽  
...  
Keyword(s):  
Solid State ◽  
Layered Double Hydroxides ◽  
Solid State Nmr ◽  
Ir Studies ◽  
Ft Ir ◽  
Double Hydroxides

Solid-state NMR and FT IR studies of the preparation of Si-B-C-N ceramics from ­boron-modified polysilazanes

2001 ◽  
Vol 15 (10) ◽  
pp. 809-819 ◽  
Author(s):  
Jörg Schuhmacher ◽  
Frank Berger ◽  
Markus Weinmann ◽  
Joachim Bill ◽  
Fritz Aldinger ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Ir Studies ◽  
Ft Ir

From Layered Double Hydroxides to Layered Double Hydroxide-Based Nanocomposites—A Solid-State NMR Study

2009 ◽  
Vol 113 (51) ◽  
pp. 21308-21313 ◽  
Author(s):  
Anastasia Vyalikh ◽  
Francis Reny Costa ◽  
Udo Wagenknecht ◽  
Gert Heinrich ◽  
Dominique Massiot ◽  
...  
Keyword(s):  
Solid State ◽  
Layered Double Hydroxide ◽  
Layered Double Hydroxides ◽  
Solid State Nmr ◽  
Nmr Study ◽  
Double Hydroxide ◽  
Double Hydroxides

scholarly journals A Comparative Study on The Adsorption Behavior of Congo Red on to ZnAl and ZnCr Layered Double Hydroxides

2020 ◽  
Vol 9 (2) ◽  
pp. 108-116
Author(s):  
Tarmizi Taher ◽  
◽  
Nyanyu Ummu Hani ◽  
Neza Rahayu Palapa ◽  
Risfidian Mohadi ◽  
...  
Keyword(s):  
Experimental Data ◽  
Surface Area ◽  
Adsorption Kinetics ◽  
Layered Double Hydroxides ◽  
Congo Red ◽  
Adsorption Process ◽  
Bet Surface Area ◽  
Pseudo Second Order ◽  
Ft Ir ◽  
Double Hydroxides

In this work, two synthetic layered double hydroxides (LDH) consists of Zn2+ as M2+ cation with different M3+ cation, i.e., Al3+ and Cr3+ were used as an adsorbent for Congo Red removal aqueous solution. Both Zn-Al and Zn-Cr LDH were characterized by X-ray diffraction, FT-IR, and BET surface area analyzer. The effect of contact time, initial dye concentration, and temperature were evaluated in a batch technique in order to investigate the characteristic of Congo Red adsorption onto both adsorbents. The experimental data were assessed according to the parameter of adsorption kinetics, isotherm, and thermodynamics. The results of LDH characterization showed that Zn-Al LDH has a higher interlayer distance than Zn-Cr LDH, although Zn-Cr LDH has a higher surface area. The FT-IR analysis indicated the interlayer space of both Zn-Cr and Zn-Al LDH was dominated by CO32- as the interlayer anion species. The adsorption kinetics study of Congo Red on both LDH revealed that the adsorption process followed the pseudo-second-order model. For the adsorption isotherm, the experimental data fit well with the Freundlich model rather than the Langmuir model. The thermodynamic study indicated that the adsorption process that occurred on both adsorbents was spontaneous with exothermic nature.

scholarly journals Evaluation of Mg/Al Layered Double Hydroxides as Adsorbent Material for Adsorptive Removal of Congo Red (Acid Red 28) Azodye from Aqueous Solution

2020 ◽  
Vol 32 (9) ◽  
pp. 2381-2388
Author(s):  
LAM VAN TAN ◽  
HONG THAM NGUYEN THI ◽  
TO UYEN DAO THI ◽  
VAN THUAN TRAN
Keyword(s):  
Aqueous Solution ◽  
Layered Double Hydroxides ◽  
Congo Red ◽  
Organic Dyes ◽  
Synthesis Temperature ◽  
Inorganic Layer ◽  
Adsorptive Removal ◽  
Ft Ir ◽  
Ir Analysis ◽  
Double Hydroxides

The use of inorganic layer compounds as adsorbents for organic dyes in water treatment is of increasing interest. In this study, an attempt is made for the synthesis of Mg/Al LDHs by the hydrothermal method. The synthesis temperature was found to significantly affect to the structure of layered double hydroxides (LDHs), as pointed out by FT-IR analysis. In addition, an adsorption capacity of the synthesized LDHs against Congo red in aqueous solutions was investigated and also compared the adsorption results with other dyes such as methylene blue and methyl orange.

A solid-state NMR, FT-IR and TPD study on acid properties of sulfated and metal-promoted zirconia: Influence of promoter and sulfation treatment

2006 ◽  
Vol 116 (2) ◽  
pp. 111-120 ◽  
Author(s):  
Wen-Hua Chen ◽  
Hui-Hsin Ko ◽  
Ayyamperumal Sakthivel ◽  
Shing-Jong Huang ◽  
Shou-Heng Liu ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Acid Properties ◽  
Ft Ir
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