Catalyst support using cellulose fibers, preparation method thereof, supported catalyst comprising nano-metal catalyst supported on carbon nanotubes directly grown on surface of the catalyst support, and method of preparing the supported catalyst

A method of preparing a nano-metal-supported catalyst, comprising:

• splitting cellulose fibers, thus preparing a cellulose catalyst support;
• growing carbon nanotubes on the prepared catalyst support;
• and
• supporting a nano-metal catalyst on the catalyst support having the carbon nanotubes grown thereon,
• wherein the supporting the nano-metal catalyst on the catalyst support having the carbon nanotubes grown thereon comprises (E) removing the catalyst metal for growing carbon nanotubes from the carbon nanotubes grown on the surface of the cellulose catalyst support and performing pretreatment for supporting the nano-metal catalyst, and (F) supporting the nano-metal catalyst on the surface of the carbon nanotubes grown on the surface of the cellulose catalyst support, which is pretreated, using chemical vapor deposition, and
• wherein the performing the pretreatment in (E) is conducted through hydrochloric acid solution treatment, water washing, drying, and treatment at 50˜70° C. for 5˜300 min using an acid mixture solution of nitric acid and sulfuric acid.