摘要
采用无机分散溶胶-凝胶法,以CuCl_(2)·2H_(2)O作为铜源并辅以CO_(2)超临界干燥和高温处理制备了铜基气凝胶。利用扫描电镜(SEM)、X射线衍射(XRD)、红外光谱(FT-IR)、物理吸附以及热重(TG-DTA)等表征手段,对其在不同处理温度下的微观形貌、孔结构和热性能进行研究分析。结果表明:在处理温度200℃下,铜基气凝胶互联网络骨架密实,具有较好的支撑结构。在400℃时样品的主要成分为氧化铜;其比表面积最高可达306.16m^(2)/g。与400℃时的样品相比,室温样品的孔体积增加了427倍,比表面积增大了314倍左右。热分解过程分3个阶段,其中在第二阶段(195.04~317.15℃)样品质量损失量最大,此阶段样品质量减少了29.63%,最终在789.30℃左右热分解达到稳定。
In this paper,copper-based aerogels were prepared by inorganic dispersion sol-gel method with CuCl_(2)·2H_(2)O as copper source supplemented with CO_(2) supercritical drying and high temperature treatment.SEM,XRD,FT-IR,physical adsorption and TG-DTA were used to study the microstructure,pore structure and thermal properties of Cu-based aerogels at different treatment temperatures.The results showed that the interconnected network skeleton of Cu-based aerogels was dense and had a good support structure at a processing temperature of 200℃.The main component of the sample was copper oxide and the maximum specific surface area was 306.16m^(2)/g at 400℃.Compared with the sample at 400℃,the pore volume and specific surface area of the sample at room temperature increased by 427 times and 314 times,respectively.The thermal decomposition process was divided into three stages,of which the sample mass loss was the largest in the second stage(195.04~317.15℃),where the sample mass was reduced by 29.63%and finally reached the thermal decomposition stability at around 789.30℃.
作者
段建国
严新帅
王亚雄
苏庆宗
黄孝笑
Duan Jianguo;Yan Xinshuai;Wang Yaxiong;Su Qingzong;Huang Xiaoxiao(School of Mechanical Engineering,Inner Mongolia University of Science and Technology,Baotou 014014;School of Chemistry and Chemical Engineering,Inner Mongolia University of Science and Technology,Baotou 014010;Inner Mongolia Key Laboratory of Coal Chemical Industry and Comprehensive Utilization of Coal,Baotou 014010)
出处
《化工新型材料》
CAS
CSCD
北大核心
2024年第S01期152-156,162,共6页
New Chemical Materials
基金
内蒙古科技大学博士研究生科研创新项目(B20231118Z)
内蒙古自治区高校基本业务费项目(2023QNJS060)
内蒙古自治区应用技术研究与开发项目(2020GG0153)。
关键词
铜基气凝胶
无机分散溶胶-凝胶法
热处理
孔结构
热分解
copper-based aerogel
inorganic dispersion sol-gel method
high temperature treatment
pore structure
thermal decomposition
