活性炭的双氧水表面改性及其吸附二氧化硫性能研究  

Surface Modification of Activated Carbon with Hydrogen Peroxide and Its Adsorption Performance for Sulfur Dioxide

作　　者：杨森 赵耀辉 徐淑权[1] 杨欢 YANG Sen;ZHAO Yao-hui;XU Shu-quan;YANG Huan(Southwest Institute of Technology and Engineering,Chongqing 400039,China)

机构地区：[1]西南技术工程研究所,重庆400039

出　　处：《包装工程》2023年第7期46-53,共8页Packaging Engineering

摘　　要：目的制备武器装备贮存微环境用单组分的二氧化硫吸附材料。方法采用双氧水对椰壳活性炭进行表面改性,研究改性活性炭孔隙结构、表面化学性质的变化及其对二氧化硫吸附性能的影响。结果活性炭存在微孔和中孔,改性后活性炭比表面积略有增加,平均孔径减小。双氧水与活性炭反应起到刻蚀作用,在活性炭表面产生了纳米尺度的网孔结构,降低了活性炭表面碳微晶有序程度,同时双氧水与活性炭反应时起到了氧化作用,提升了活性炭表面氧元素和含氧官能团含量。体积分数为20%的双氧水改性活性炭的吸附容量最高,达到154.15 mg/g,约为改性前的5倍。结论双氧水对活性炭经表面改性后,产生了纳米尺度的孔隙,并提升了活性炭表面含氧官能团,在两者协同作用下显著提升活性炭对SO_(2)吸附性能,具有良好的装备应用前景。The work aims to prepare single component sulfur dioxide adsorbent for storage microenvironment of weapons and equipment.Hydrogen peroxide was used to modify the surface of activated carbon.The porous structure and the change of surface chemical property of modified activated carbon were investigated and the adsorption performance for sulfur dioxide was also studied.Activated carbon had micropores and mesopores.After surface modification,the specific surface area increased and the average pore diameter decreased.Hydrogen peroxide reacted with activated carbon,resulting in etching,which generated nano-scale pore structure on the surface of activated carbon and reduced the order degree of carbon microcrystalline on the surface of activated carbon.At the same time,hydrogen peroxide reacted with activated carbon to play an oxidation role,which improved the content of oxygen elements and oxygen-containing functional groups on the surface of activated carbon.The activated carbon modified by 20%hydrogen peroxide possessed optimal adsorption capacity(up to 154.15 mg/g),about 5 times as much as that of unmodified activated carbon.The activated carbon with surface modified by hydrogen peroxide generates nano-scale pores and improves the oxygen-containing functional groups.Under the synergistic effect of nano-scale pores and oxygen-containing functional groups,the adsorption performance of activated carbon for SO_(2) is significantly improved,which has good application prospects in equipment.

关 键 词：椰壳活性炭 双氧水 吸附 二氧化硫 表面改性 

分 类 号：TQ424.1[化学工程]