Research institute of Petroleum Industry (RIPI) Journal of Petroleum Research 2345-2900 35 1404-1 2025 04 21 Synthesis of High-surface-area Carbon- and Oxygen-doped Boron Nitride for Enhanced Hydrogen Physisorption Capacity Synthesis of High-surface-area Carbon- and Oxygen-doped Boron Nitride for Enhanced Hydrogen Physisorption Capacity 68 80 1478 10.22078/pr.2025.5419.3411 FA Farshid Farzaneh Ceramics Group, School of Metallurgy and Materials Engineering, Iran University Science & Technology, Tehran, Iran. Hajar Ghanbari Ceramics Group, School of Metallurgy and Materials Engineering, Iran University Science & Technology, Tehran, Iran. Mohammad Golmohammad Renewable Energy Department, Niroo Research Institute, Tehran, Iran Hossein Sarpoolaky Ceramics Group, School of Metallurgy and Materials Engineering, Iran University Science & Technology, Tehran, Iran. Journal Article 2024 04 20 Doping by substitution in boron nitride using carbon and oxygen has been studied. The aim of this research was to modify the synthesis process to achieve doping of carbon and oxygen into the boron nitride structure by substituting dopant atoms with boron or nitrogen atoms without causing significant changes in the nanostructure and properties of the sample. To achieve this, the precursor for boron nitride synthesis was prepared by simultaneous dissolution of guanidine carbonate and boric acid in water and subsequent precipitation. This precursor was then subjected to a mixed nitrogen-hydrogen gas atmosphere (95% N2 / 5% H2) at temperatures of 1000°C and 1500°C for 3 hours. Phase analysis was performed using X-ray diffraction (XRD), microstructure investigation was carried out using scanning electron microscopy (SEM), and surface area measurement was conducted using nitrogen adsorption and desorption (BET) analysis. Additionally, X-ray photoelectron spectroscopy (XPS) was utilized to determine the concentration and placement of dopant atoms within the structure. The results indicate successful synthesis of boron nitride sheets at 1000°C with sub-nanometer pore sizes and high surface area. Furthermore, the phase analysis results show X-ray diffraction peaks corresponding to hexagonal boron nitride. Ultimately, the results of Raman spectroscopy confirms the formation of bonds within the boron nitride sheets, and the measured percentages of oxygen and carbon doping in the material are reported as 6% and 17%, respectively. Factors such as relatively low synthesis temperature and the use of a nitrogen/hydrogen mixed atmosphere in the synthesis process enabled the doping of oxygen and carbon atoms into the boron nitride structure. Doping by substitution in boron nitride using carbon and oxygen has been studied. The aim of this research was to modify the synthesis process to achieve doping of carbon and oxygen into the boron nitride structure by substituting dopant atoms with boron or nitrogen atoms without causing significant changes in the nanostructure and properties of the sample. To achieve this, the precursor for boron nitride synthesis was prepared by simultaneous dissolution of guanidine carbonate and boric acid in water and subsequent precipitation. This precursor was then subjected to a mixed nitrogen-hydrogen gas atmosphere (95% N2 / 5% H2) at temperatures of 1000°C and 1500°C for 3 hours. Phase analysis was performed using X-ray diffraction (XRD), microstructure investigation was carried out using scanning electron microscopy (SEM), and surface area measurement was conducted using nitrogen adsorption and desorption (BET) analysis. Additionally, X-ray photoelectron spectroscopy (XPS) was utilized to determine the concentration and placement of dopant atoms within the structure. The results indicate successful synthesis of boron nitride sheets at 1000°C with sub-nanometer pore sizes and high surface area. Furthermore, the phase analysis results show X-ray diffraction peaks corresponding to hexagonal boron nitride. Ultimately, the results of Raman spectroscopy confirms the formation of bonds within the boron nitride sheets, and the measured percentages of oxygen and carbon doping in the material are reported as 6% and 17%, respectively. Factors such as relatively low synthesis temperature and the use of a nitrogen/hydrogen mixed atmosphere in the synthesis process enabled the doping of oxygen and carbon atoms into the boron nitride structure. https://pr.ripi.ir/article_1478_83cdcec08fbf90370fcf53bdd56604ff.pdf