Co-Cr bimetallic oxide derived from layered double hydroxides with high catalytic performance for chlorinated aromatics oxidation

Catalytic Performance ◽

Chlorinated Aromatics ◽

Molar Ratios ◽

Co-Cr bimetallic oxide with different Co/Cr molar ratios were prepared through a layered double hydroxides (LDHs) derived method. Their physicochemical properties together with catalytic performance for chlorinated aromatics (1, 2-dichlorobenzene...

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

The Journal of Physical Chemistry C ◽

10.1021/acs.jpcc.8b10935 ◽

2019 ◽

Vol 123 (14) ◽

pp. 8777-8784 ◽

Cited By ~ 4

Author(s):

Cristina Cuautli ◽

Jaime S. Valente ◽

J. C. Conesa ◽

M. Verónica Ganduglia-Pirovano ◽

Joel Ireta

Keyword(s):

Theoretical Study ◽

Catalytic Performance ◽

Nanoparticles of Cu–Co alloy derived from layered double hydroxides and their catalytic performance for higher alcohol synthesis from syngas

RSC Advances ◽

10.1039/c5ra05190h ◽

2015 ◽

Vol 5 (72) ◽

pp. 58804-58812 ◽

Cited By ~ 35

Author(s):

Ang Cao ◽

Guilong Liu ◽

Yizhi Yue ◽

Lihong Zhang ◽

Yuan Liu

Keyword(s):

Catalytic Performance ◽

Precipitation Method ◽

Higher Alcohol Synthesis ◽

Higher Alcohol ◽

Alcohol Synthesis ◽

Co Precipitation ◽

A series of layered double hydroxides (LDHs) with different Cu/Co ratios were prepared according to the co-precipitation method and used as catalyst precursors for higher alcohol synthesis.

Adsorption of Ink-Jet Inks and Anionic Dyes onto Mg-Al-NO3 Layered Double Hydroxides of Variable Mg:Al Molar Ratio

Australian Journal of Chemistry ◽

10.1071/ch09362 ◽

2010 ◽

Vol 63 (1) ◽

pp. 83 ◽

Cited By ~ 1

Author(s):

Anthony R. Auxilio ◽

Philip C. Andrews ◽

Peter C. Junk ◽

Leone Spiccia

Keyword(s):

Molar Ratio ◽

Anionic Dyes ◽

Type Curves ◽

Molar Ratios ◽

High Affinity ◽

Ink Jet ◽

Jet Printing ◽

Double Hydroxides ◽

Adsorption Desorption

Layered double hydroxides are materials that show promise as adsorbing media for ink-jet printing. In this work, layered double hydroxides with nitrate as interlayer anions and with variable Mg:Al molar ratios ranging from 2.2 to 8.1 have been synthesized at constant pH by the coprecipitation method and characterized by powder X-ray diffraction, N2 adsorption–desorption, scanning electron microscopy, and helium pycnometry techniques. The ability of these materials to adsorb ink-jet inks (BCI-Cyan, BCI-Yellow, and BCI-Magenta) and anionic dyes (CI Acid Blue 9 (AB9), CI Acid Yellow 23 (AY23), and CI Acid Red 37 (AR37)) were investigated. BCI-Yellow was found to have high affinity for material with an Mg:Al molar ratio between 2.2 and 4.0, whereas BCI-Cyan and BCI-Magenta showed a high affinity when the Mg:Al molar ratio was between 4.8 and 5.5. The adsorption isotherms for AB9, AY23, and AR37 on the material with Mg:Al molar ratios 2.2–5.5 exhibited H-type curves, indicating a very strong interaction between the adsorbate and adsorbent. Although there was no clear systematic correlation between the MgsAl molar ratio and the Cm (dye capacity) and Ka (dye affinity), the optimum Mg:Al molar ratio was 4.0, and this material has the potential to be used in Ink-Receptive Layer formulation.

Photocatalytic decolourization of methylene blue using [Zn-Al] layered double hydroxides synthesized at different molar cationic ratios

Clay Minerals ◽

10.1180/claymin.2017.052.2.03 ◽

2017 ◽

Vol 52 (2) ◽

pp. 203-215 ◽

Cited By ~ 2

Author(s):

Kaouther Abderrazek ◽

Najoua Frini Srasra ◽

Ezzeddine Srasra

Keyword(s):

Methylene Blue ◽

Photocatalytic Activity ◽

Diffuse Reflectance Spectroscopy ◽

X Ray Diffraction ◽

X Ray ◽

Inductively Coupled ◽

Molar Ratios ◽

Constant Ph ◽

Abstract[Zn-Al] layered double hydroxides (LDH) with cationic molar ratios of R = Zn/Al 1–5 were synthesized by the coprecipitation method at constant pH = 10. The samples synthesized and their derived forms obtained after calcination at 500°C and at 900°C (denoted Zn-Al-R, Zn-Al-R-500 and Zn-Al-R-900, respectively), were characterized by X-ray diffraction (XRD), inductively coupled plasmamass spectrometry, scanning electron microscopy, energy-dispersive X-ray spectroscopy, diffuse reflectance spectroscopy and nitrogen physisorption at −196°C. The XRD study showed: (1) the presence of accessory ZnO with the LDH in samples synthesized with R ≥ 3; and (2) the lamellar structure was destroyed at 500°C which made room for a poorly ordered ZnO phase, while calcination at 900°C yielded well crystallized ZnO and ZnAl2O4. The photocatalytic activity of the calcined and the unheated samples was evaluated for the decolourization of methylene blue. The photocatalytic activity was dependent on the cationic ratio R and on the calcination temperature. The sample Zn-Al-3 displayed maximum photocatalytic activity. Calcination at 500 and 900°C improved the photocatalytic activity of LDH synthesized at R = 1 and 2.

Evaluation of the physiochemical properties and catalytic performance of CuCoMnAl mixed oxides derived from layered double hydroxides precursors with different mole ratios of Cu/Co on the oxidation of toluene

Reaction Kinetics Mechanisms and Catalysis ◽

10.1007/s11144-019-01676-9 ◽

2019 ◽

Vol 128 (2) ◽

pp. 965-977 ◽

Cited By ~ 3

Author(s):

Wen Li ◽

Shanshan Yang ◽

Keliang Wang ◽

Shunheng Tu ◽

Meijuan Lu ◽

...

Keyword(s):

Mixed Oxides ◽

Catalytic Performance ◽

Physiochemical Properties ◽

Characterization and Catalytic Performance of Cu/ZnO/Al2O3 Water–Gas Shift Catalysts Derived from Cu–Zn–Al Layered Double Hydroxides

Industrial & Engineering Chemistry Research ◽

10.1021/acs.iecr.6b04337 ◽

2017 ◽

Vol 56 (12) ◽

pp. 3175-3183 ◽

Cited By ~ 17

Author(s):

Dalin Li ◽

Shuping Xu ◽

Yunbing Cai ◽

Chongqi Chen ◽

Yingying Zhan ◽

...

Keyword(s):

Catalytic Performance ◽

Water Gas Shift ◽

Double Hydroxides ◽

Water Gas

Nitrogen removal by modified zeolites coated with Zn-layered double hydroxides (Zn-LDHs) prepared at different molar ratios

Journal of the Taiwan Institute of Chemical Engineers ◽

10.1016/j.jtice.2018.03.010 ◽

2018 ◽

Vol 87 ◽

pp. 73-82 ◽

Cited By ~ 7

Author(s):

Ye Yuan ◽

Xiangling Zhang ◽

Yu Lei ◽

Yinghe Jiang ◽

Zhouying Xu ◽

...

Keyword(s):

Nitrogen Removal ◽

Molar Ratios ◽

Modified Zeolites ◽

Studies on the formation of 5-aminosalicylate intercalated Zn–Al layered double hydroxides as a function of Zn/Al molar ratios and synthesis routes

Chemical Engineering Science ◽

10.1016/j.ces.2006.12.041 ◽

2007 ◽

Vol 62 (7) ◽

pp. 2022-2031 ◽

Cited By ~ 49

Author(s):

Kang Zou ◽

Hui Zhang ◽

Xue Duan

Keyword(s):

Molar Ratios ◽

Synthesis Routes ◽

Preparation and Characterization of Nanocrystalline Ce-Containing Layered Double Hydroxides

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.239-242.375 ◽

2011 ◽

Vol 239-242 ◽

pp. 375-379 ◽

Cited By ~ 1

Author(s):

Chun Xia Chen ◽

Yu Zhang ◽

Han Qing Zhao ◽

Jin Song Peng ◽

Bin Li

Keyword(s):

Particle Size ◽

Reaction Temperature ◽

Crystallization Time ◽

Molar Ratios ◽

Microwave Assisted ◽

Crystallization Method ◽

Double Hydroxides ◽

Better Than

Ce-containing Layered Double Hydroxides (Ce-LDHs) were prepared by conventional and microwave-assisted crystallization method, which were denoted as Ce-LDHs-A and Ce-LDHs-B, respectively. The dispersibility of Ce-LDHs-B is much better than that of Ce-LDHs-A; the particles of Ce-LDHs-B with particle size ranging from 20 to 70 nm are smaller than that of Ce-LDHs-A with sizes around 50-300 nm. The effect of the cerium to aluminum molar ratios, microwave crystallization time and reaction temperature on the structure of Ce-LDHs was also investigated. The results show the excessive Ce into LDHs causes distortion of the samdwich, the damage of the LDHs structure becomes more and more serious with increasing the proportion of Ce/Al. The structure of Ce-LDHs becomes more and more perfect with the increasing of the microwave crystallization time and reaction temperature.