Isik Birol, Ugraskan Volkan, Cakar Fatih, Yazici Ozlem
Department of Chemistry, Faculty of Arts & Sciences, Yildiz Technical University, Esenler, Istanbul, 34220, Turkey.
J Chromatogr Sci. 2022 Dec 29;61(1):7-14. doi: 10.1093/chromsci/bmac017.
The boron-based ceramics namely hexagonal boron nitride (h-BN) and boron phosphate (BPO4) were synthesized and characterized by Fourier transform infrared spectroscopy and X-ray diffraction analysis. The surface properties of h-BN and BPO4 were examined by inverse gas chromatography method. The dispersive surface energy and the acidic-basic character of h-BN, and BPO4 surfaces were estimated by the retention time with probes such as n-hexane, n-heptane, n-octane, n-nonane, n-decane, acetone, ethyl acetate, dichloromethane, chloroform and tetrahydrofuran at infinite dilution region. The dispersive surface free energies calculated using both Schultz and Dorris-Gray methods, decreased linearly with increasing temperature. The specific adsorption free energy and the specific adsorption enthalpy corresponding to acid-base surface interactions were determined. By correlating with the donor and acceptor numbers of the probes, the acidic and the basic parameters of the h-BN and BPO4 were calculated. The values obtained for and parameters indicated that h-BN has a basic character, whereas BPO4 has an acidic character.
合成了硼基陶瓷，即六方氮化硼（h-BN）和磷酸硼（BPO4），并通过傅里叶变换红外光谱和X射线衍射分析对其进行了表征。采用反相气相色谱法研究了h-BN和BPO4的表面性质。通过在无限稀释区域使用正己烷、正庚烷、正辛烷、正壬烷、正癸烷、丙酮、乙酸乙酯、二氯甲烷、氯仿和四氢呋喃等探针的保留时间，估算了h-BN和BPO4表面的分散表面能以及酸碱性质。使用舒尔茨法和多里斯-格雷法计算的分散表面自由能随温度升高呈线性下降。测定了对应于酸碱表面相互作用的比吸附自由能和比吸附焓。通过与探针的给体数和受体数相关联，计算了h-BN和BPO4的酸性和碱性参数。所得的 和 参数值表明，h-BN具有碱性，而BPO4具有酸性。
