Mechanochemical and wet chemical syntheses of CaIn-layered double hydroxide and its performance in a transesterification reaction compared to those of other Ca2M(III) hydrocalumites (M: Al, Sc, V, Cr, Fe, Ga) and Mg(II)-, Ni(II)-, Co(II)- or Zn(II)-based hydrotalcites

Szabados, Márton; Ádám, Anna Adél; Traj, Péter; Muráth, Szabolcs; Baán, Kornélia; Bélteky, Péter; Sipos, Pál; Pálinkó, István

doi:10.1016/j.jcat.2020.07.038

Cited by 27 publications

(18 citation statements)

References 85 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although REE cations are included in the structure of LDHs mostly only partially and co-existed with another triply charged cation, several articles demonstrated the successful synthesis of binary RE-LDHs-Mg/Tb (Wang et al, 2017), Zn/Eu (Chen et al, 2018), Ca/Sc (Szabados et al, 2020), and Ni/La (Ensafi et al, 2016;Jiang et al, 2019). Our group is one of the first to synthesize Sc-containing LDHs (including the first binary Mg/Sc LDHs) (Vorontsova et al, 2007).…”

Section: Introductionmentioning

confidence: 96%

Layered Double Hydroxides Containing Rare Earth Cations: Synthesis and Applications

2022

View full text Add to dashboard Cite

In this mini-review, we describe the currently available literature concerning synthesis and applications of layered double hydroxides (LDHs) containing rare earth cations (RE-LDHs), focusing on the catalytic activity of those compounds. The lack of studies of some rare earth elements (REE) and the insufficient knowledge of their catalytic activity in the structure of LDHs indicate the need for further research.

show abstract

Section: Introductionmentioning

confidence: 96%

Layered Double Hydroxides Containing Rare Earth Cations: Synthesis and Applications

2022

View full text Add to dashboard Cite

show abstract

“…We focused on ZnAl-reconstructed LDHs (RE-LDHs). In general, ZnM LDHs (M Al 3+ , Fe 3+ , Ga 3+ , and Ti 3+ ) (Palmer et al, 2011;Wang and Zhang, 2012;Kikhtyanin et al, 2018;Bukhtiyarova, 2019;Santamaría et al, 2020;Szabados et al, 2020) can be prepared by several methods from various precursors of given metals, such as nitrates (Bellezza et al, 2014;Zeng et al, 2017;Tang et al, 2019), chlorides (Ambrogi et al, 2012;Zhang and Li, 2014) or sulfates (Mishra et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of the ZnAl Mixed Oxides Into the Layered Double Hydroxide Catalysts Active in the Aldol Condensation of Furfural: The Role of ZnO Particles

et al. 2022

View full text Add to dashboard Cite

A memory effect is the ability to restore the original, lamellar layered double hydroxide structure. Herein, we have described 1) the changes in the structural and basic properties of ZnAl mixed oxides during their transformation into ZnAl-reconstructed LDHs (RE-LDHs); 2) the extraordinary properties of ZnAl RE-LDHs compared to the original ZnAl LDHs; and 3) the changes of basic properties during the interaction of ZnAl RE-LDHs with atmospheric CO2. Aldol condensation was selected as probe reaction to prove the catalytic potential of ZnAl RE-LDHs. We have described a target method for preparing ZnAl RE-LDHs with a large number of basic sites. ZnAl RE-LDHs possess significantly higher furfural conversion in the aldol condensation of furfural than MOs. The structural, textural, and basic properties of the studied materials were described by temperature-programmed analysis, X-ray diffraction, N2 adsorption, temperature-programmed desorption of CO2, and in-situ diffuse reflectance spectroscopy.

show abstract

“…The majority of LDHs have an intrinsically basic character and the cationic components, with alternating oxidation states, serve as redox centers. Hence, these compounds are commonly employed in transesterification [4], Michael addition [5], or even in photochemical transformations [6]. The following formula anions compared to that of the more conventional (x ≤ 0.5) LDHs [11,12].…”

Section: Introductionmentioning

confidence: 99%

M(II)Al4 Type Layered Double Hydroxides—Preparation Using Mechanochemical Route, Structural Characterization and Catalytic Application

et al. 2021

Self Cite

View full text Add to dashboard Cite

The synthesis of the copper-poor and aluminum-rich layered double hydroxides (LDHs) of the CuAl4 type was optimized in detail in this work, by applying an intense mechanochemical treatment to activate the gibbsite starting reagent. The phase-pure forms of these LDHs were prepared for the first time; using copper nitrate and perchlorate salts during the syntheses turned out to be the key to avoiding the formation of copper hydroxide sideproducts. Based on the use of the optimized syntheses parameters, the preparation of layered triple and multiple hydroxides was also attempted using Ni(II), Co(II), Zn(II) and even Mg(II) ions. These studies let us identify the relative positions of the incorporating cations in the well-known selectivity series as Ni2+ >> Cu2+ >> Zn2+ > Co2+ >> Mg2+. The solids formed were characterized by using powder X-ray diffractometry, UV–Vis diffuse reflectance spectroscopy, Fourier-transform infrared spectroscopy, thermogravimetric analysis and scanning electron microscopy. The catalytic potential of the samples was investigated in carbon monoxide oxidation reactions at atmospheric pressure, supported by an in situ diffuse reflectance infrared spectroscopy probe. All solids proved to be active and the combination of the nickel and cobalt incorporation (which resulted in a NiCoAl8 layered triple hydroxide) brought outstanding benefits regarding low-temperature oxidation and increased carbon monoxide conversion values.

show abstract

Mechanochemical and wet chemical syntheses of CaIn-layered double hydroxide and its performance in a transesterification reaction compared to those of other Ca2M(III) hydrocalumites (M: Al, Sc, V, Cr, Fe, Ga) and Mg(II)-, Ni(II)-, Co(II)- or Zn(II)-based hydrotalcites

Cited by 27 publications

References 85 publications

Layered Double Hydroxides Containing Rare Earth Cations: Synthesis and Applications

Layered Double Hydroxides Containing Rare Earth Cations: Synthesis and Applications

Reconstruction of the ZnAl Mixed Oxides Into the Layered Double Hydroxide Catalysts Active in the Aldol Condensation of Furfural: The Role of ZnO Particles

M(II)Al4 Type Layered Double Hydroxides—Preparation Using Mechanochemical Route, Structural Characterization and Catalytic Application

Contact Info

Product

Resources

About