scholarly journals Aging of trivalent metal hydroxide/oxide gels in divalent metal salt solutions: Mechanism of formation of layered double hydroxides (LDHs)

2003 ◽  
Vol 26 (7) ◽  
pp. 661-666 ◽  
Author(s):  
A V Radha ◽  
P Vishnu Kamath
Keyword(s):  
Layered Double Hydroxides ◽  
Metal Salt ◽  
Divalent Metal ◽  
Metal Hydroxide ◽  
Salt Solutions ◽  
Mechanism Of Formation ◽  
Trivalent Metal ◽  
Double Hydroxides

scholarly journals Effect of Divalent Metal Ions on the Stability of Cu-Containing Layered Double Hydroxides

2012 ◽  
Vol 28 (07) ◽  
pp. 1714-1720 ◽  
Author(s):  
NI Zhe-Ming ◽  
◽  
LIU Jiao ◽  
XUE Ji-Long ◽  
LI Yuan ◽  
...  
Keyword(s):  
Metal Ions ◽  
Layered Double Hydroxides ◽  
Divalent Metal ◽  
Divalent Metal Ions ◽  
The Stability ◽  
Double Hydroxides

Divalent metal release and antimicrobial effects of layered double hydroxides

2022 ◽  
Vol 216 ◽  
pp. 106369
Author(s):  
Jazia Awassa ◽  
Damien Cornu ◽  
Samantha Soulé ◽  
Cédric Carteret ◽  
Christian Ruby ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Divalent Metal ◽  
Metal Release ◽  
Antimicrobial Effects ◽  
Double Hydroxides

Order and disorder among the layered double hydroxides: combined Rietveld and DIFFaX approach

2007 ◽  
Vol 63 (2) ◽  
pp. 243-250 ◽  
Author(s):  
A. V. Radha ◽  
P. Vishnu Kamath ◽  
C. Shivakumara
Keyword(s):  
Layered Double Hydroxides ◽  
Elevated Temperatures ◽  
Metal Salt ◽  
Rietveld Method ◽  
Structure Refinement ◽  
Stacking Faults ◽  
Structural Disorder ◽  
Complete Structure ◽  
Order And Disorder ◽  
Double Hydroxides

A combined approach using the Rietveld technique of structure refinement and DIFFaX simulations of the powder patterns enables us to not only arrive at the complete structure of the layered double hydroxides (LDHs), but also classify and quantify the nature of structural disorder. Hydrolysis of urea dissolved in mixed-metal salt solutions containing a divalent metal (Mg2+, Co2+) with Al3+ results in the homogeneous precipitation of the corresponding LDH. The products obtained are highly crystalline enabling a complete structure determination including subsequent refinement by the Rietveld method. In contrast, the LDH of Ni2+ with Al3+ crystallizes with the incorporation of stacking faults. A combined Rietveld–DIFFaX approach shows that even `crystalline' samples of this LDH incorporate up to 9% of stacking faults, which are not eliminated even at elevated temperatures (473 K). These studies have implications for the order, disorder and `crystallinity' of layered phases in general and metal hydroxides in particular.

Photocatalytic Degradation of Methylene Blue Over Layered Double Hydroxides Using Various Divalent Metal Ions

2019 ◽  
Vol 67 (4) ◽  
pp. 340-347 ◽  
Author(s):  
Guoxiang Pan ◽  
Minhong Xu ◽  
Kai Zhou ◽  
Yue Meng ◽  
Haifeng Chen ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Metal Ions ◽  
Photocatalytic Degradation ◽  
Layered Double Hydroxides ◽  
Divalent Metal ◽  
Divalent Metal Ions ◽  
Double Hydroxides
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