Synthesis, characterization, and thermal conductivity properties of graphene oxide doped chromium-titanium oxide structures

This study investigates synthesis and characterization of graphene oxide (GO) undoped and doped chromium-titanium oxide structures, along with their thermal conductivity properties in detail. The importance of low or high thermal conductivity varies depending on the type of material intended, and it is known that thermal conductivity, which determines the ability of materials to conduct heat, plays a crucial role in energy, electronics, and thermoelectric applications. Materials with low thermal conductivity are widely used in various industrial fields due to their ability to isolate heat effectively. For experimental studies, GO-undoped(T1), 1%-GO-doped(T2), and 3%-GO-doped(T3) samples were produced via sol-gel method, followed by calcination, pelletization, and sintering processes. Characterization of these pellets was performed using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Fourier Transform-Infrared Spectroscopy (FTIR). Thermal conductivity was measured using Physical Properties Measurement System (PPMS). No structural or peak changes were detected in the XRD and FTIR results, but differences in peak intensities were observed. SEM images revealed that reductions in structural dimensions occurred with GO doping, and this was explained by changes in thermal conductivity data. The thermal conductivity values of T1, T2, and T3 samples were measured as 6.49, 3.45, and 1.50 W/K·m, respectively. These findings indicate that GO-doping reduces thermal conductivity and differences in the material structure are effective. Additionally, it was observed that the reduction of the structure to the nanoscale also led to a decrease in thermal conductivity data. These materials could play an important role in developing next-generation material designs.