CAJ | 학술논문

采用CuCl2溶液对椰壳活性炭进行改性，制备高容量甲醛吸附活性炭。以扫描电镜(SEM)观测改性前后活性炭的表面形貌；用低温液氮吸附(N2/77K)来表征铜盐浓度的改变对活性炭孔隙结构的影响；用X射线光电子能谱( XPS)分析活性炭表面元素组成及存在形式；用X射线衍射( XRD)研究载铜活性炭的晶形结构；以常温动态吸附评价活性炭对甲醛的吸附性能。研究结果表明：改性活性炭中铜以Cu、CuCl及CuCl23种形式存在，改性活性炭微孔数量减少，介孔比例提高；同时，随铜盐浓度增加，活性炭的比表面积和孔容减少，平均孔径变大；改性后活性炭表面含氧官能团数量增加。当CuCl2浓度为0.5 mol/L时，制备的改性活性炭对甲醛的吸附容量(4.28 mg/g)是原料活性炭(1.38 mg/g)的3.1倍，甲醛在改性活性炭上的吸附行为符合Freundlich吸附模型。
채용CuCl2용액대야각활성탄진행개성，제비고용량갑철흡부활성탄。이소묘전경(SEM)관측개성전후활성탄적표면형모；용저온액담흡부(N2/77K)래표정동염농도적개변대활성탄공극결구적영향；용X사선광전자능보( XPS)분석활성탄표면원소조성급존재형식；용X사선연사( XRD)연구재동활성탄적정형결구；이상온동태흡부평개활성탄대갑철적흡부성능。연구결과표명：개성활성탄중동이Cu、CuCl급CuCl23충형식존재，개성활성탄미공수량감소，개공비례제고；동시，수동염농도증가，활성탄적비표면적화공용감소，평균공경변대；개성후활성탄표면함양관능단수량증가。당CuCl2농도위0.5 mol/L시，제비적개성활성탄대갑철적흡부용량(4.28 mg/g)시원료활성탄(1.38 mg/g)적3.1배，갑철재개성활성탄상적흡부행위부합Freundlich흡부모형。
The impregnation of CuCl2 on coconut shell based activated carbon was investigated for efficient formaldehyde removals. Scanning electron microscopy ( SEM) was used for morphology structure observation. Nitrogen adsorption isotherm was employed for pore structure analysis. The surface elements of activated carbon were tested by XPS. XRD was used for analyzing the crystal forms of cupric salt. Dynamic studies of formaldehyde adsorption at room temperature was carried out by adsorption performance test. The results showed that cupric salt existed in three forms, i. e. , Cu, CuCl and CuCl2 . The increment of Cu loading leads to the decreasing of surface area and pore volume of activated carbon,and the increasing of average pore diameter. After modification, the surface oxygenated groups on the surface of activated carbon increased. When CuCl2 concentration was 0. 5 mol/L,formaldehyde adsorption capacity(4. 28 mg/g) of the modified activated carbon was 3. 1 times than that of the original one(1. 38 mg/g). Adsorption behavior of formaldehyde on modified activated carbons fitted Freundlich adsorption isotherm well.