Catalysts having metal nano-particle catalyst supported on surface-treated natural cellulose fibers and preparation method thereof

摘要

The present disclosure relates to a catalyst having metal catalyst nanoparticles supported on natural cellulose fibers and a method of preparing the same, whereby natural cellulose fibers are subjected to specific pretreatment to increase a surface area and form defects on the surface thereof and metal catalyst nanoparticles are then supported on the cellulose catalyst support in a highly dispersed state, thereby providing improved catalysis while allowing production of the catalyst at low cost. The catalyst may be utilized for various catalytic reactions.

主权项

1. A method of preparing a catalyst having metal catalyst nanoparticles supported on natural cellulose fibers, comprising:
(1) treating natural cellulose fibers with an electron beam by irradiating an electron beam of 10 to 500 kGy to the natural cellulose fibers; (2) heat-treating the electron beam-treated natural cellulose fibers by cutting the electron beam treated natural cellulose fibers to a length of 1˜2 mm in a state of being impregnated in liquid nitrogen, and heat-treating natural cellulose fibers at 500 to 1500° C. at a rate of 5 to 20° C./min under in an atmosphere composed of a 1:1 mixture of hydrogen and nitrogen, the temperature being maintained at 500 to 1500° C. for 0.5 to 2 hours to carbonize the natural cellulose fibers; (3) chemically treating the heat-treated natural cellulose fibers with an acidic solution to introduce an oxidizing group to a surface of the natural cellulose fibers to prepare a cellulose catalyst support, wherein chemically treating the natural cellulose fibers comprises sweeping the heat-treated natural cellulose fibers in 10-60 cycles at −0.15-1.3 V at a sweep rate of 50 mV/s, with the heat-treated natural cellulose fibers immersed in a 0.1-0.5 M aqueous sulfuric acid solution, followed by chemically treating the natural cellulose fibers, with the natural cellulose fibers immersed in a 30% nitric acid solution at 100-150° C.; and (4) supporting metal catalyst nanoparticles directly on the surface of the cellulose catalyst support by chemical vapor deposition or impregnation, wherein through a series of electron beam treatment, heat treatment, and chemical treatment, the cellulose catalyst support has pores with an inner channel size of up to 10 μm and a BET surface area of 230-383 m2/g, and functional groups introduced to a surface of the natural cellulose fibers.