NGHIÊN CỨU TỔNG HỢP, CẤU TRÚC VÀ TÍNH CHẤT CỦA VẬT LIỆU GO và rGO

Tóm tắt

In this study, graphene oxide material was synthesized on the basis of modified Hummer's method and rGO
was synthesized by green chemical reduction method, using extract from Celastrus hindsu benth leaves. The
characteristics of structure, morphology, chemical composition and properties were determined by the
measurements including XRD, FT-IR, Raman scattering, EDX, SEM, TEM, TGA/DTA. The results showed
that the graphite oxidation process had caused the appearance of many oxygen-containing functional
groups, resulting in the surface morphology to become revealing a crumpled and rippled structure; the
diffraction peak (002) at 26,5o
shifted to 10,1o
and the integer ratio atoms of C/O decreased. During the GO
reduction, the polyphenol compounds in the extract reacted, leading to a reduction in the number of Ocontaining functional groups on the surface of the material, the diffraction peak (002) shifted to about 25o
.
However, the intensity of the diffraction peak was weak and the reduction was not complete. Finally, the
thermal stability of rGO materials was better than GO, which was consistent with their structural
characteristics.