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中文摘要：
本文在硫酸介质中,采用溶胶-凝胶法制备多孔吸附剂介孔SiO_2,通过透射电了显微镜（TEM）、X射线光电子能谱（XPS）、N_2吸附脱附对SiO_2的结构进行分析,用动态水蒸气吸附分析仪研究SiO_2对水蒸气的吸附和再生温度。结果表明制备的SiO_2比表面积为607.3 m~2·g~,平均孔径为4.3 nm,在极低（≤10%）和高相对湿度下对水蒸气具有高的吸附量,360 K即可再生,再生性能好。
英文摘要：
Mesoporous SiO_2 was synthesized by means of sol-gel method in H_2SO_4 medium.The characterization of the SiO_2 were determined by transmission electron microscope（TEM）.X-ray photoelectron spectroscopy（XPS）,N_2 adsorption-desorption isotherm and dynamic water vapor sorption analyzer（DVSA）.The results show that the BET surface area and average pore size of the SiO_2 were about 607.3 m~2·g~（-1） and 4.3 nm,respectively.The water vapor adsorption capacity of the SiO_2 were high both in low relative humidity（≤10%） and high relative humidity at 298 K, furthermore,the desorption activation temperature is 360 K.
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