![]() ![]() Warren, W.B.: Powder Diffraction File, PDF-2 Database, International Centre for Diffraction Data (ICDD), 2012, in X-Ray Diffraction, Addison-Wesley, Reading, (1969). Tascón, J.M.: Comparative XRD, Raman, and TEM study on graphitization of PBO-derived carbon fibers. In: Boron Nitride Properties, Synthesis and Applications. Lux, B.: High performance non-oxide ceramics II. Oz, M.: Temperature dependency on crystallinity and durability of mineral dolomite doped nanocrystalline hexagonal boron nitride. Lux, B.: Investigation of the c-BN/h-BN phase transformation at normal pressure. Sato, T.: Preparation and properties of a compound in the B-C-N system. Brozek, V.: Kinetics of deoxidizing of hexagonal boron nitride preparations. Kintigh, J.T.: Formation of aryl-nitrogen bonds using a soluble copper (I) catalyst. Zhang, J.L.: Aerobic oxidation of primary alcohols catalyzed by copper salts and catalytically active m-hydroxyl-bridged trinuclear copper intermediate. Blanco, M.M.: Efficient cesium carbonate promoted N-alkylations of aromatic cyclic imides under microwave irradiation. Tekin, A.: Crystallization behavior and characterization of turbostratic boron nitride. Yildirim, G.: Synthesis of highly ordered hBN in presence of group I/IIA carbonates by solid state reaction. Topkaya, Y.: Catalytic effect of alkaline earth oxides on carbothermic formation of hexagonal boron nitride. Rogovaya, I.G.: Effect of lithium on structure of graphite-like boron nitride with carbothermal synthesis. Rogovaya, I.G.: Catalytic synthesis of graphite-like boron nitride. O’Connor, T.E.: Synthesis of boron nitride. Pease, R.S.: An X-ray study of boron nitride. Inc., Springer Verlag, Berlin (1965)īrotherton R.J.: Progress in Boron Chemistry, Pergamon Press, California, vol. Dawson, J.W.: Boron-Nitrogen Compounds, pp. Narula, C.K.: Synthetic routes to boron nitride. Caesium carbonate propagated the graphitic nature and crystallinity of BN at a lower temperature than O’Connor method due to rise in electronic interaction as a basic compound. The SSA and porosity parameters are found to be about 77.1 m 2/g and 0.1–100 nm range, respectively. ![]() The EDX results reveal that the elements used for the preparation of samples distribute homogeneously and neither caesium nor carbon atoms enter into the crystal structure indicating the purity of samples. The porous nature of the product has been confirmed by the SEM and evolution of gaseous material from the surface. The average grain size of the synthesized undoped, 0.9 and 1.2 g caesium carbonate-doped samples had 3.61, 10.84 and 12.00 nm, respectively. gBN formation determined by XRD analysis was accelerated and improved ordered lateral polymorph in which graphitization index was found to be very close to the graphite as 2.02 and 1.84 as for 0.9 and 1.2 g dopant level, respectively. The products were characterized by using infrared spectroscopy (FTIR), powder X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), high-resolution transmission electron microscopy (HR-TEM) and specific surface area (SSA) and porosity analysis. The mass ratio of caesium carbonate was adjusted as 0.9 and 1.2 at the constant mass of urea and B 2O 3 in a mixture of 2 g and 1 g, respectively. ![]() In this study, the effect of caesium carbonate with a balanced strong base characteristic on the morphology crystallinity, porosity and specific surface area of graphitic boron nitride is reported. ![]()
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