Method of forming nitrogen-doped porous graphene envelope
Disclosed is a method of forming a nitrogen-doped porous graphene envelope. The method of forming the nitrogen-doped porous graphene envelope includes dissolving a nitrogen precursor in an organic precursor and then vaporizing the resulting precursor to thus simultaneously synthesize the graphene envelope and perform nitrogen doping in a single step.
1. A method of forming a nitrogen-doped porous graphene envelope, the method comprising:
(S1) vaporizing an organic precursor and a nitrogen precursor to form the graphene envelope in a vaporizer;
(S2) providing substrate particles in a reactor, in which synthesis is to be performed, and then heating the reactor to increase a temperature to a final reaction temperature; and
(S3) supplying the organic precursor and the nitrogen precursor of step (S1) using a carrier gas to the reactor of step (S2) and maintaining the reactor for a predetermined time,
wherein the organic precursor is a liquid precursor selected from the group consisting of ethanol, methanol, acetylene, and acetone, and
wherein the nitrogen precursor is pyridine.
2. The method of claim 1 , wherein the substrate particles are a platinum-supported carbon black catalyst, metal nanoparticles for catalyst reforming, or silicon nanoparticles for a secondary battery electrode.
3. The method of claim 1 , wherein the step (S1) includes vaporizing a precursor solution which includes the nitrogen precursor dissolved in the organic precursor.
4. The method of claim 1 , wherein the temperature of the reactor is increased to 400 to 1100° C. during the step (S2).
5. The method of claim 1 , wherein the carrier gas is an oxygen, hydrogen, argon, helium, or nitrogen gas.
6. A method of forming a nitrogen-doped porous graphene envelope, the method comprising:
(S1) vaporizing an organic precursor and a nitrogen precursor to form the graphene envelope in a vaporizer;
(S2) providing substrate particles in a reactor, in which synthesis is to be performed, and then heating the reactor to increase a temperature to a final reaction temperature; and
(S3) supplying the organic precursor and the nitrogen precursor of step (S1) using a carrier gas to the reactor of step (S2) and maintaining the reactor for a predetermined time,
wherein the organic precursor is a liquid precursor selected from the group consisting of ethanol, methanol, acetylene, and acetone,
wherein the substrate particles are metal nanoparticles for catalyst reforming, and
wherein the metal nanoparticles are nickel-supported alumina particles.