Morphological study of fluorescent carbon Nanoparticles (F-CNPs) from ground coffee waste soot oxidation by diluted acid

TALENTA - Conference on Engineering, Science and Technology 2017

工业技术;自然科学

Gea, S.^1 ; Tjandra, S.^1 ; Joshua, J.^1 ; Wirjosentono, B.^1

Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Sumatera Utara, Jl. Bioteknologi No. 1 Padang Bulan, Medan

20155, Indonesia^1

关键词: Coffee grounds;    Different treatments;    Fluorescent carbon nanoparticles;    Morphological study;    Soot oxidation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/309/1/012037/pdf
DOI  :  10.1088/1757-899X/309/1/012037

来源: IOP

【 摘 要 】

Coffee ground waste utilization for fluorescent carbon nanoparticles (F-CNPs) through soot oxidation with diluted HNO3has been conducted. Soot was obtained through three different treatments to coffee ground waste; which was burned in furnaceat 550°C and 650°C and directly burned in a heat-proofcontainer. Then they were analyzed morphologically with Scanning Electron Microscope (SEM) instrument. Soot from direct burning indicated the optimum result where it has denser pores compared to other two soots. Soot obtained from direct burning was refluxed in diluted HNO3for 12 hours to perform the oxidation. Yellowish brown supernatant was later observed which lead to green fluorescent under the UV light. F-CNPs characterization was done in Transmission Electron Microscopy, which showed that 7.4-23.4 nm of particle size were distributed.