物理化学学报2000，Vol.16Issue(2)：105-110,6.
硝酸镁在γ-Al2O3上的热分解及MgO/γ-Al2O3的碱性
Thermal Decomposition Behavior of Mg(NO3)2 on γ-Al2O3 and Basicity of MgO/γ-Al2O3
摘要
Abstract
The state and thermal decomposition behavior of Mg(NO3)2 on γ-Al2O3 at different Mg loading were studied by XRD and TG-DTA. The basicity of MgO/γ-Al2O3 with different Mg loading was investigated by CO2-TPD and compared with that of Mg-Al mixed oxides derived from hydrotalcite. Results show that Mg(NO3)2 can disperse on γ-Al2O3 as a monolayer and its dispersion determines the dispersion threshold of MgO on γ-Al2O3. Mg(NO3)2 in dispersion state has lower decomposition temperature than that in crystal state. The amount of basic sites per square meter on the surface of MgO/γ-Al2O3 shows a highest value around the loading of threshold, which indicates that the basicity of MgO/γ-Al2O3 originates from MgO in dispersion state. The basicity of MgO/γ-Al2O3 around the threshold loading is comparable and even superior to that of Mg(Al)O derived from hydrotalcite. Since the texture and specific area of γ-Al2O3 can be easily adapted and there are various kinds of commercial γ-Al2O3 available, MgO/γ-Al2O3 is a promising solid base that may be found in use.关键词
Mg(NO3)2/γ-Al2O3,MgO/γ-Al2O3,负载型固体碱,热分解,CO2-TPDKey words
Mg(NO3)2/γ-Al2O3,MgO/γ-Al2O3,Supported solid base,Thermal decomposition,CO2-TPD分类
社会科学引用本文复制引用
江德恩,赵璧英,谢有畅..硝酸镁在γ-Al2O3上的热分解及MgO/γ-Al2O3的碱性[J].物理化学学报,2000,16(2):105-110,6.基金项目
国家科委基础性研究重大项目课题 （）
国家自然科学基金重点资助项目(29733080) （29733080）
