Composite body having nanoparticles uniformly dispersed in nano-sized pores in support, and method for producing same
AssigneeKorea Institute of Science and Technology
InventorsKa Hyun HUR, Min Seok KIM
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Abstract
Provided are a composite in which metal nanoparticles are evenly dispersed and adsorbed to pores of a support, and a method of preparing the same. An amorphous nanostructure formed of inorganic polymers having a transition metal and a halogen element as a main chain via hydrogen bonding is used as a chemical template for forming the metal nanoparticles. The formed metal nanoparticles are evenly dispersed and adsorbed to the support with pores.
Claims20
A composite comprising:
- a support having a large number of pores and a positive charge on its surface;
- and
- metal nanoparticles that are adsorbed into the pores and have a diameter of 2 nm to 2.5 nm,
- wherein the metal nanoparticles comprise silver (Ag), gold (Au), platinum (Pt), palladium (Pd), ruthenium (Ru), indium (Ir), osmium (Os), rhodium (Rh), cobalt (Co), sodium (Na), potassium (K), iron (Fe), cadmium (Cd), nickel (Ni), chromium (Cr), thallium (Tl), rubidium (Rb), zinc (Zn), copper (Cu), manganese (Mn), molybdenum (Mo), indium (In), gallium (Ga), bismuth (Bi), titanium (Ti), lead (Pb), aluminum (Al), magnesium (Mg) or antimony (Sb).
A method of preparing a composite, comprising:
- preparing an amorphous nanostructure in which inorganic polymers having Formula 1 below are hydrogen-bonded;
- mixing a second metal precursor comprising a second metal element having a higher standard reduction potential than a central metal of the inorganic polymer with the amorphous nanostructure;
- dissociating the amorphous nanostructure by forming a metal nanoparticle consisting of the second metal element on the surface of the amorphous nanostructure;
- and
- adsorbing the metal nanoparticles into pores of a support,
- In Formula 1, M is a transition metal as a central metal, X is a halogen element, CF is a functional group for bonding, which includes a hydrogen element and an element for hydrogen bonding, and, n is a repeat number ranging from 10 to 500,000.
The method of claim therein the mixing of the second metal precursor with the amorphous nanostructure comprises,
- mixing the second metal precursor comprising one type of the second metal element with the amorphous nanostructure, and
- the metal nanoparticle consisting of the second metal element has a single crystalline phase.
Dependencies are inferred from the claim text.