Electrochemical route for accessing amorphous mixed-metal hydroxide nanospheres and magnetism

RSC Advances ◽  
2015 ◽  
Vol 5 (56) ◽  
pp. 45359-45367 ◽  
Author(s):  
H. B. Li ◽  
Y. Q. Gao ◽  
G. W. Yang
Keyword(s):  
Metal Hydroxide ◽  
Electrochemical Technique ◽  
Homogeneous Distribution ◽  
Metal Hydroxides ◽  
Mixed Metal ◽  
Mixed Metal Hydroxides

Amorphous mixed-metal hydroxides nanospheres with a homogeneous distribution of metals in compositions including binary Fe–Co, Fe–Ni and Co–Ni and ternary Ni–Co–Fe hydroxides were prepared via a simple, facile and green electrochemical technique.

Evidence of Variations in Atomic Distribution in Disordered Mixed Metal Hydroxides

MRS Advances ◽  
2019 ◽  
Vol 4 (33-34) ◽  
pp. 1843-1850
Author(s):  
Wen Rong ◽  
Sarah Stepan ◽  
Rodney D. L. Smith
Keyword(s):  
Transition Metal Oxides ◽  
Iron Ions ◽  
X Ray Diffraction ◽  
Metal Hydroxides ◽  
X Ray ◽  
Mixed Metal ◽  
Apparent Solubility ◽  
Fundamental Understanding ◽  
Double Hydroxides ◽  
Mixed Metal Hydroxides

ABSTRACTNumerous fabrication protocols are known to yield transition metal oxides with structures related to layered double hydroxides, but the effect of fabrication protocol on the uniformity of mixed-metal compositions remain largely unexplored. We have analysed the apparent solubility limits and the structural implications of iron ions in nickel hydroxide lattices for materials prepared by four different fabrication protocols. Opposing shifts in the (100) and (001) reflection in powder X-ray diffraction results revealed a contraction of the nickel lattice upon successful incorporation of iron, with Ni-M distances exhibiting an apparently linear decrease with respect to iron content. This feature revealed the amount of iron incorporated into nickel-based materials to be dependent on fabrication protocol, varying from apparently negligible concentrations to over fifty atomic percent. The dependency of structure on fabrication protocols provides a handle to improve fundamental understanding of catalytically relevant coordination environments.

Temperature-dependent structural behavior of mixed-metal hydroxides in air

2015 ◽  
Vol 151 ◽  
pp. 104-108
Author(s):  
Yun-Hee Lee ◽  
Ki-Bok Kim ◽  
D.H. Gregory ◽  
Yong-Il Kim
Keyword(s):  
Structural Behavior ◽  
Temperature Dependent ◽  
Metal Hydroxides ◽  
Mixed Metal ◽  
Mixed Metal Hydroxides

The effect of particle size of clay on the viscosity build up property of mixed metal hydroxides (MMH) in the low solid-drilling mud compositions

2013 ◽  
Vol 80-81 ◽  
pp. 169-175 ◽  
Author(s):  
Barsha Baruah ◽  
Mridusmita Mishra ◽  
Chira R. Bhattacharjee ◽  
Mool C. Nihalani ◽  
Santosh K. Mishra ◽  
...  
Keyword(s):  
Particle Size ◽  
Drilling Mud ◽  
Metal Hydroxides ◽  
Mixed Metal ◽  
Effect Of Particle Size ◽  
Mixed Metal Hydroxides

scholarly journals CHITOSAN-TEMPLATED LIGHTWEIGHT SPINEL CoAl2O4 NANOFIBRIL AEROGELS

2018 ◽  
Vol 56 (1A) ◽  
pp. 135
Author(s):  
Chau The Lieu Trang
Keyword(s):  
Aqueous Solution ◽  
Aluminum Hydroxide ◽  
Water Soluble ◽  
Metal Hydroxides ◽  
Cobalt Ions ◽  
Spider Web ◽  
Magnetic Ceramics ◽  
Aluminum Ions ◽  
Soluble Aluminum ◽  
Mixed Metal Hydroxides

We present lightweight macro-mesoporous spinel CoAl2O4 nanostructured aerogels derived from water-soluble aluminum-chitosan complexes. Chitosan nanofibrils interact with aluminum ions to swell into hydrogels. The aluminum-induced swelling is extended to dissolve the hydrogels in water to form a homogeneous aluminum-chitosan aqueous solution. The addition of cobalt ions in the aluminum-chitosan liquids which are solidified by lyophilization to generate cotton-like aerogel composites. Uniform incorporation of cobalt-aluminum hydroxide ions onto chitosan leads nanofibrils to serve as a hierarchical template to support mixed metal hydroxides in the aerogel composites. We investigated the thermal removal of chitosan template in the composites to obtain spinel CoAl2O4 aerogels that truly replicate spider web-like fibrillar networks of chitosan template. Enlarged porosity, high crystallinity, and lightweight make the CoAl2O4 aerogels useful as a colorful nano-pigment for magnetic ceramics.

scholarly journals Phase segregation reversibility in mixed-metal hydroxide water oxidation catalysts

2020 ◽  
Vol 3 (9) ◽  
pp. 743-753 ◽  
Author(s):  
Chunguang Kuai ◽  
Zhengrui Xu ◽  
Cong Xi ◽  
Anyang Hu ◽  
Zhijie Yang ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Phase Segregation ◽  
Metal Hydroxide ◽  
Oxidation Catalysts ◽  
Mixed Metal ◽  
Hydroxide Water
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