六硼酸钡Ba_(3)B_(6)O_(9)(OH)_(6)热力学性质研究  

Thermodynamic properties of bariumhexaborate Ba_(3)B_(6)O_(9)(OH)_(6)

作　　者：岑方龙 冯晓琴 王万钟[1] 陈南洋 武文韬 黄宏升 CEN Fang-Long;FENG Xiao-Qin;WANG Wan-Zhong;CHEN Nan-Yang;WU Wen-Tao;HUANG Hong-Sheng(School of Chemical Engineering,Guizhou Institute of Technology,Guiyang 550003,China;Guizhou Provincial Key Laboratory of Energy Chemistry in General Colleges and Universities,Guizhou Institute of Technology,Guiyang 550003,China)

机构地区：[1]贵州理工学院化学工程学院,贵阳550003 [2]贵州理工学院贵州省普通高等学校能源化学特色重点实验室,贵阳550003

出　　处：《原子与分子物理学报》2024年第1期9-14,共6页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(21963006);贵州理工学院高层次人才科研启动项目(XJGC2019614);贵州理工学院大学生创新创业训练项目。

摘　　要：本文通过水热法合成了六硼酸钡Ba_(3)B_(6)O_(9)(OH)_(6),并通过X射线衍射(XRD)、红外光谱(FT-IR)、综合热分析法(TG-DSC)和扫描电子显微镜(SEM)对其进行了表征.通过微量热仪测定了Ba_(3)B_(6)O_(9)(OH)_(6)在0.9995 mol·dm^(-3)HCl(aq)的摩尔溶解焓为(32.34±0.58)kJ·mol^(-1),并计算了其标准摩尔生成焓为-(7130.664±4.2)kJ·mol^(-1).此外,通过基团贡献法估算了[B6O9(OH6)]^(6-)的摩尔生成焓为-5517.744 kJ·mol^(-1).In this paper, barium hexaborate Ba_(3)B_(6)O_(9)(OH)_(6)was synthesized by hydrothermal method, and analyzed by X-ray diffraction(XRD), infrared spectroscopy(FT-IR), comprehensive thermal analysis(TG-DSC) and scanning electron microscopy(SEM). The molar dissolution enthalpy of Ba_(3)B_(6)O_(9)(OH)_(6)in 0.9995 mol·dm^(-3)HCl(aq) was determined by microcalorimeter to be(32.34±0.58) kJ·mol^(-1), and its standard molar enthalpy of formation was calculated to be-(7130.664±4.2) kJ·mol^(-1). In addition, the molar enthalpy of formation of [B6O9(OH)_(6)]^(6-)was estimated to be-5517.744 kJ·mol^(-1)by group contribution method.

关 键 词：六硼酸钡 标准摩尔生成焓 热力学性质 量热法 基团贡献法 

分 类 号：O642.3[理学—物理化学]