A Stepwise Control Route for the Preparation of Mg-Al, Zn-Al, and Mg-Fe Layered Double Hydroxides (LDHs)

2008 ◽  
Vol 368-372 ◽  
pp. 1820-1822
Author(s):  
Zhao Hui Liu ◽  
Xiao Hua Gu ◽  
Zhao Cai Zhang ◽  
Dan Wang ◽  
Cui Yu Yin ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Particle Size ◽  
Size Distribution ◽  
Layered Double Hydroxides ◽  
Room Temperature ◽  
Ph Value ◽  
Constant Ph ◽  
Double Hydroxides ◽  
Aqueous Complexes ◽  
Structure Properties

Mg-Al, Zn-Al, and Mg-Fe layered double hydroxides (LDHs) have been synthesized through a stepwise control route. In the stepwise control route, we controlled the state of Al or Fe composition as Al or Fe hydroxyl aqueous complexes in aqueous solution first, then dropwise Mg2+ or Zn2+ and OH - and keep procedure at constant pH value simultaneously at room temperature. The textural and structure properties of the resulting samples were characterized by XRD and TG-DTG. The results showed that products obtained by the stepwise control route were pure and highly crystalline LDHs. The particle size and size distribution was measured by DLLS.

scholarly journals Continuous Synthesis of Doped Layered Double Hydroxides in a Meso-Scale Flow Reactor

2018 ◽  
Author(s):  
Polina Yaseneva ◽  
Nan An ◽  
Matt Finn ◽  
Nicholas Tidemann ◽  
Nicholas Jose ◽  
...  
Keyword(s):  
Particle Size ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Layered Double Hydroxides ◽  
Flow Reactor ◽  
Synthesis Method ◽  
Material Stability ◽  
Double Hydroxides ◽  
Meso Scale

Detailed characterisation of morphology of doped hydrotalcites as catalysts precursors. Trends of material stability, pore size distribution, particle size as a function of the nature of dopants. Data on the flow synthesis method and reproducibility of materials that can be attained by this method.

scholarly journals Continuous Synthesis of Doped Layered Double Hydroxides in a Meso-Scale Flow Reactor

2018 ◽  
Author(s):  
Polina Yaseneva ◽  
Nan An ◽  
Matt Finn ◽  
Nicholas Tidemann ◽  
Nicholas Jose ◽  
...  
Keyword(s):  
Particle Size ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Layered Double Hydroxides ◽  
Flow Reactor ◽  
Synthesis Method ◽  
Material Stability ◽  
Double Hydroxides ◽  
Meso Scale

Detailed characterisation of morphology of doped hydrotalcites as catalysts precursors. Trends of material stability, pore size distribution, particle size as a function of the nature of dopants. Data on the flow synthesis method and reproducibility of materials that can be attained by this method.

Batch Precipitation of Lead Iodide

1994 ◽  
Vol 59 (6) ◽  
pp. 1301-1304
Author(s):  
Jaroslav Nývlt ◽  
Stanislav Žáček
Keyword(s):  
Aqueous Solution ◽  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Crystal Size ◽  
Lead Nitrate ◽  
Lead Iodide ◽  
Constant Rate ◽  
Mean Size ◽  
The Mean

Lead iodide was precipitated by a procedure in which an aqueous solution of potassium iodide at a concentration of 0.03, 0.10 or 0.20 mol l-1 was stirred while an aqueous solution of lead nitrate at one-half concentration was added at a constant rate. The mean size of the PbI2 crystals was determined by evaluating the particle size distribution, which was measured sedimentometrically. The dependence of the mean crystal size on the duration of the experiment exhibited a minimum for any of the concentrations applied. The reason for this is discussed.

Congo red and direct yellow dye removal from aqueous solution by Zn/Cr layered double hydroxides

2018 ◽  
Author(s):  
Bakri Rio Rahayu ◽  
Tarmizi Taher ◽  
Poedji Loekitowati Hariani ◽  
Aldes Lesbani
Keyword(s):  
Aqueous Solution ◽  
Layered Double Hydroxides ◽  
Congo Red ◽  
Dye Removal ◽  
Double Hydroxides

Removal of Benzoate Anions from Aqueous Solution Using Mg-Al Layered Double Hydroxides

2003 ◽  
Vol 390 (1) ◽  
pp. 49-56 ◽  
Author(s):  
Lucelena Patricio Cardoso ◽  
Jairo Tronto ◽  
Eduardo Luis Crepaldi ◽  
João Barros Valim
Keyword(s):  
Aqueous Solution ◽  
Layered Double Hydroxides ◽  
Double Hydroxides
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