RT info:eu-repo/semantics/article T1 On a composite obtained by thermolysis of Cu-doped glycine A1 Chamorro Posada, Pedro A1 Dante, Roberto C. A1 Martín Gil, Jesús A1 Dante, Denisse G. A1 Cioci, Alma A1 Vázquez Cabo, José A1 Rubiños López, Óscar A1 Mediavilla Martínez, Irene A1 Martín Ramos, Pablo K1 Copper K1 Cobre K1 X-ray spectroscopy K1 Carbon K1 Carbon composites K1 Composite materials K1 Materiales compuestos K1 Thermal conductivity K1 Thermolysis K1 Calor K1 Spectroscopy K1 X-ray spectroscopy K1 Electron microscopy K1 Microscopia electrónica K1 Materials science K1 Analytical chemistry K1 2202.01 Conductividad K1 2209.21 Espectroscopia K1 2301.20 Espectroscopia de Rayos X K1 3312 Tecnología de Materiales K1 2301 Química Analítica AB Metal-doped carbonaceous materials have garnered significant attention in recent years due to their versatile applications in various fields, including catalysis, energy storage, environmental remediation, electronics, and sensors, as well as reinforcement. This study investigates the synthesis and characterization of a composite material featuring a carbonaceous matrix doped with copper, focusing on the thermolysis of glycine as a precursor. The synthesis methodology involved utilizing glycine and copper acetate monohydrate in varying ratios, with the mixture subjected to heating in ceramic crucibles at temperatures ranging from 450 to 550 °C, with pyrolysis yields over the 5 to 39% interval. The pristine and Cu-doped samples obtained at 500 °C underwent characterization using a diverse array of techniques, including scanning and transmission electron microscopies, multi-elemental analysis by energy dispersive X-ray spectroscopy, CHNS elemental analysis, X-ray photoelectron spectroscopy, X-ray powder diffraction, infrared and Raman spectroscopies, ultraviolet-visible spectroscopy, and terahertz time-domain spectroscopy, along with conductivity measurements. Under optimized conditions, copper (at 6.5%) was present primarily in the free metallic form, accompanied by traces of tenorite (CuO) and cuprite (Cu2O). The carbonaceous matrix exhibited a 6:1 ratio of graphitic carbon to a carbon-nitrogen compound with the formula C2H2N2O2, such as isomers of diazetidinedione, according to multi-elemental analysis results. Conductivity measurements disclosed a significant increase in conductivity compared to the product of glycine thermolysis, showcasing the enhanced electrical properties of the new composite. Additionally, terahertz measurements showed the potential of the material as a broadband absorber for the fabrication of terahertz devices and provided compelling evidence of a significant improvement in radiation absorption upon copper doping. In conclusion, this research sheds light on the promising properties of copper-doped carbonaceous composites obtained by glycine pyrolysis, offering insights into their potential applications in emerging technological domains. PB MDPI SN 2311-5629 YR 2024 FD 2024 LK https://uvadoc.uva.es/handle/10324/68167 UL https://uvadoc.uva.es/handle/10324/68167 LA eng NO C-Journal of Carbon Research, 2024, Vol. 10, Nº. 2, 49 NO Producción Científica DS UVaDOC RD 28-jun-2024