【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SiO₂,通过透射电了显微镜（TEM）、X射线光电子能谱（XPS）、N₂吸附脱附对SiO₂的结构进行分析,用动态水蒸气吸附分析仪研究SiO₂对水蒸气的吸附和再生温度。结果表明制备的SiO₂比表面积为607.3 m²·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。更多还原

【Abstract】 Mesoporous SiO₂ was synthesized by means of sol-gel method in H₂SO₄ medium.The characterization of the SiO₂ were determined by transmission electron microscope（TEM）.X-ray photoelectron spectroscopy（XPS）,N₂ adsorption-desorption isotherm and dynamic water vapor sorption analyzer（DVSA）.The results show that the BET surface area and average pore size of the SiO₂ were about 607.3 m²·g^-1 and 4.3 nm,respectively.The water vapor adsorption capacity of the SiO₂ were high both in low relative humidity（≤10%） and high relative humidity at 298 K, furthermore,the desorption activation temperature is 360 K.更多还原