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利用氨吸附漫反射红外光谱法探测蒙脱石的固体酸性
A Study on the Acidity of Montmorillonite by using Ammonia DRIFT Spectroscopy

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刘冬 1   袁鹏 1 *   刘红梅 1   蔡进功 2   覃宗华 1   樊明德 1   陶奇 1   何宏平 1   朱建喜 1  
文摘 用氨吸附漫反射红外光谱学方法, 借助图谱拟合解谱手段, 探测了不同预处理温度下蒙脱石表面酸性变化特征, 并分析了其变化原因. 结果表明, 低温热处理后的蒙脱石, 其B酸和L酸量增大; 经较高温度(400、600 ℃)煅烧的样品, 层间距急剧减小, 氨分子难以进入层间与酸位发生反应, 可探测到的两种酸量都将减少
其他语种文摘 The surface acidity of montmorillonite pretreated at different temperatures was studied by using ammonia-adsorption Diffuse Reflectance Infrared Fourier Transform spectroscopy (DRIFT) Curve fitting on the obtained spectra was conducted and the differences of spectra of various montmorillonite samples were specifically analyzed The results show that the Bronsted and Lewis acid capacity increases in the montmorillonite pretreated at low-temperature, compared with non-pretreated montmorillonite However, for the montmorillonite calcined at higher temperatures (400 and 600 ℃), acid capacities of both the B and L decrease This is due to that calcination results in the decrease of the height of interlayer and the ammonia molecules are therefore hard to get into the interlayer region and react with the acid sites
来源 矿物学报 ,2010,30(1):33-39 【核心库】
关键词 氨吸附 ; 蒙脱石 ; 漫反射红外光谱 ; 固体酸性 ; 谱图拟合
地址

1. 中国科学院 广州地球化学研究所, 广东, 广州, 510640  

2. 同济大学 海洋与地球科学学院, 上海, 200092

语种 中文
文献类型 研究性论文
ISSN 1000-4734
学科 地质学
基金 中国石油化工股份有限公司项目 ;  国家自然科学基金项目
文献收藏号 CSCD:3929671

参考文献 共 24 共2页

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