文献类型：期刊文献

英文题名：Synthesis and Thermodynamic Properties of 4zno·B2o3·H2o with Three Different Morphologies

作者：Cen, Fanglong Feng, Xiaoqin Zhu, Fusheng Zheng, Jia Zhang, Hongyan Huang, Hongsheng

第一作者：Cen, Fanglong

机构：[1] School of Chemical Engineering, Guizhou Institute of Technology, Guiyang, 550003, China; [2] Key Laboratory of Energy Chemistry in Guizhou Universities, Guiyang, 550003, China

第一机构：贵州理工学院化学工程学院

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230386960)

语种：英文

外文关键词：Enthalpy - II-VI semiconductors - Particle size - Zinc oxide

摘要：Polycrystalline 4ZnO·B2O3·H2O with flower-like, spherical-like and sheet-like morphologies have been synthesized and characterized by XRD, TG–DSC, SEM and TEM. The molar enthalpies of solution of 4ZnO·B2O3·H2O with different morphologies in 1 mol·dm-3 HCl(aq) were measured. With the incorporation of the previously determined enthalpy of solution of H3BO3 in 1 mol·dm-3 HCl(aq), the enthalpy of solution of ZnO in (HCl + H3BO3)(aq) and the standard molar enthalpies of formation of ZnO(s), H3BO3(s) and H2O(l), the standard molar enthalpies of formation of 4ZnO·B2O3·H2O with flower-like, spherical-like, and sheet-like morphologies were calculated to be -(3033.908 ± 0.32), -(3030.419 ± 0.32) and -(3025.94 ± 0.31) kJ·mol-1, respectively. The results show that as the particle size of 4ZnO·B2O3·H2O decreases, their standard molar enthalpy of formation increases and their thermal dehydration temperature decreases in turn. ? 2023, The Authors. All rights reserved.