Methods for synthesizing carbon nanocages
AssigneesUniversity of Louisville Research Foundation, Inc., Uniwersytet Warszawski
InventorsJacek B. Jasinski, Dominika A. Ziolkowska, Gamini U. Sumanasekera, John Samuel Dilip Jangam, Bijandra Kumar
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Abstract
A method for synthesizing carbon nanocages, including N-doped carbon nanocages, includes a first step of forming a solution including a metal salt and an organic carbon source; a second step of drying the solution to obtain a precursor powder; and a third step of annealing the precursor powder to obtain a nanocage including a metal nanoparticle surrounded by a carbon shell. The metal nanoparticle is then removed from the carbon shell by applying an acid solution.
Claims32
A method for synthesizing a carbon nanocage, comprising:
- forming a solution including a metal salt and an organic carbon source;
- drying the solution to obtain a precursor powder;
- annealing the precursor powder in a carrier gas or a vacuum at a temperature of about 450° C. to about 700° C. for a time period of about 1 minute to about 20 minutes to obtain a nanocage including a metal nanoparticle surrounded by a carbon shell, wherein the nanocage has a size of about 2 nm to about 100 nm.
A method for synthesizing a carbon nanocage, comprising:
- forming a solution including a metal salt and an organic carbon source;
- drying the solution to obtain a precursor powder;
- annealing the precursor powder in a carrier gas or a vacuum at a temperature of about 450° C. to about 700° C. for a time period of about 1 minute to about 20 minutes to obtain a nanocage including a metal nanoparticle surrounded by a carbon shell, wherein the step of annealing the precursor powder comprises annealing the precursor powder at a temperature of 600° C. for about 10 minutes.
A method for synthesizing a carbon nanocage, comprising:
- forming a solution including a metal salt and an organic carbon source;
- drying the solution to obtain a precursor powder;
- annealing the precursor powder in a carrier gas or a vacuum at a temperature of about 450° C. to about 700° C. for a time period of about 1 minute to about 20 minutes to obtain a nanocage including a metal nanoparticle surrounded by a carbon shell, wherein the nanocage has a diameter of about 3 nm.
A method for synthesizing a carbon nanocage, comprising:
- forming a solution including a metal salt and an organic carbon source;
- drying the solution to obtain a precursor powder;
- annealing the precursor powder in a carrier gas or a vacuum at a temperature of about 450° C. to about 700° C. for a time period of about 1 minute to about 20 minutes to obtain a nanocage including a metal nanoparticle surrounded by a carbon shell, wherein the nanocage has a wall thickness of about 2 or about 3 layers.
A method for synthesizing a carbon nanocage, comprising:
- forming a solution including a metal salt and an organic carbon source;
- drying the solution to obtain a precursor powder;
- annealing the precursor powder in a carrier gas or a vacuum at a temperature of about 450° C. to about 700° C. for a time period of about 1 minute to about 20 minutes to obtain a nanocage including a metal nanoparticle surrounded by a carbon shell, wherein the nanocage has a Brunauer-Emmett-Teller (BET) surface area of about 980 to about 1150 m2g−1.
A method for synthesizing a carbon nanocage, comprising:
- forming a solution including a metal salt and an organic carbon source;
- drying the solution to obtain a precursor powder;
- annealing the precursor powder in a carrier gas or a vacuum at a temperature of about 450° C. to about 700° C. for a time period of about 1 minute to about 20 minutes to obtain a nanocage including a metal nanoparticle surrounded by a carbon shell, wherein the carbon shell has a shell thickness of about 1 nm.
A method for synthesizing a carbon nanocage, comprising:
- forming a solution including a metal salt and an organic carbon source;
- drying the solution to obtain a precursor powder;
- annealing the precursor powder in a carrier gas or a vacuum at a temperature of about 450° C. to about 700° C. for a time period of about 1 minute to about 20 minutes to obtain a nanocage including a metal nanoparticle surrounded by a carbon shell, wherein the nanocage has a mono-modal pore distribution of about 2.5 nm.
A method for synthesizing a carbon nanocage, comprising:
- forming a solution including a metal salt and an organic carbon source;
- drying the solution to obtain a precursor powder;
- annealing the precursor powder in a carrier gas or a vacuum to obtain a nanocage including a metal nanoparticle surrounded by a carbon shell, wherein the organic carbon source comprises a nitrogen-containing alkaloid, an amide, or a nitrogen-containing heterocycle, wherein the nanocage is a N-doped carbon nanocage, and wherein the N-doped nanocage has an average size of about 7 nm.
Dependencies are inferred from the claim text.