Preparation and Characterization of Expanded Graphite with ZnO Composites

Abstract

The composites of expanded ghaphite with ZnO (EG/ZnO) have been prepared in the method of impregnation, and their degradation performance for crude oil have been investigated by the means of UV-Vis and FT-IR. The morphology and crystal structure of the EG/ZnO composites have been characterized by the means of SEM and XRD. The results are shown as follows: the EG/ZnO composites keep the laminated and microporous network structure of EG. ZnO particles in the composites are hexagonal crystal system, and they widely distribute in the cavities and the network pores of EG. In the UV-Vis spectra, there is a blue shift about 13 nm, which is from 255 nm to 242 nm at the biggest absorption peak. That indicates the component of the crude oil has already changed. Meanwhile, the results of FT-IR spectra show that a degradation reaction occurs obviously in the crude oil after irradiated by ultraviolet ray, and the degradation products possibly include alkone, aldehyde, alcohol, and so on. Thus, it can be inferred that the prepared EG/ZnO composites would be a new kind of functional material integrated strong adsorption property and degradation property into itself.

Preparation and Its Adsorptive Property of Modified Expanded Graphite Nanomaterials

“…Furthermore, EG has also been widely applied in waste gas removal [9], catalysts carrier [10][11][12], medical materials [13], and many other fields [14][15][16]. However, EG has some disadvantages such as fragile, light mass and low expanded ratio by one step processing, so that a lot of studies have been focused on its modification researches [17][18][19][20][21][22][23][24][25]. The modification methods for EG mainly include strong acid treatment modification, in-situ modification, surfactant modification, and surface coating modification [26,27].…”

Preparation of Graphene Oxide from Expanded Graphite at Different Microwave Heating Times

“…The peak at 1728 cm -1 indicates carboxyl bands (C=O), while the in-plane C=C (sp 2 carbon) skeletal stretching vibrations at 1616 cm -1 ; and the peak at 1400 cm -1 are for aromatic C=C. The peak at 1365 cm -1 indicates the presence of epoxy (C-O) and the peak at 1076 cm -1 is for C-OH [26][27][28]. It is clear from Figure 9(b) that the OH peak for GO at 3487 cm -1 was enhanced, indicating that more OH functional groups were attached to the GO.…”