In this study, graphite powder was used to prepare few-layer graphene sheets through shear milling. During the process, graphite was well dispersed in double distilled water as a lubricant and sodium dodecylsulfate (SDS), followed by shaking and milling under low energy. The exerted sheer force led to the continuous delamination of graphene flakes. The microstructural investigation was performed by SEM. In addition, the energy-dispersive X-ray spectroscopy (EDS) analysis was performed to determine distinct levels of carbon in different fragments of graphite. The ultrathin multilayer structure of graphite was successfully obtained using the surfactant of SDS, which can lead to the production of molecularly thin sheets by mechanical peeling. Moreover, it was found that this synthesis method has some advantages, including cost-effectiveness and ease in performance for producing many graphene nanolayers.
A sensitive optical sensor for determining Hg 2+ concentration has been prepared by incorporating the indicator dye, diphenylcarbazone compound, into cellulose acetate polymer film. To prepare the sensor, a cellulose acetate film was hydrolyzed with base and then the diphenylcarbazone compound bonded to the film. This method is easy to perform and uses acetyl cellulose as a carrier. According to the results, the prepared sensor was able to determine the Hg 2+ concentration with a ±6% error. Also, the adsorption capacity was 3.41 × 10 -3 mmol/g.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.