氧化石墨烯-聚合羟基铝复合材料的合成及其对Cd(Ⅱ)的去除效果  

Synthesis of graphite oxide-polymeric aluminum hydroxyl composites and their removal effects for Cd(Ⅱ)

作　　者：严潞 方炜炳[1] 王迁[1] 李迎迎[1] 赵谦[1] 姜廷顺[1] 

机构地区：[1]江苏大学化学化工学院,镇江212013

出　　处：《复合材料学报》2016年第3期613-617,共5页Acta Materiae Compositae Sinica

基　　金：江苏大学高级人才基金(10JDG114)

摘　　要：为制备高效Cd(Ⅱ)吸附剂,首先,采用正向滴定法将聚合羟基铝(Al13)加入到氧化石墨烯(GO)的悬浮液中,以GO为基体制备了氧化石墨烯-聚合羟基铝复合材料(GO-Al13);然后,利用XRD、FTIR和SEM等分析技术对GO-Al13进行表征,并将10mg GO-Al13添加至50mL初始浓度为10mg/L的Cd(Ⅱ)废水中进行吸附实验,研究了GO-Al13对Cd(Ⅱ)的去除效果。结果表明:[Al13]7+离子会与GO的含氧官能团发生作用,产生Al—O基团;将[Al13]7+离子加入到GO中后,GO-Al13的表面形貌与GO相比会发生较大改变,出现不规则的凹凸结构,且粗糙程度也大幅度增加;当废水中Cd(Ⅱ)的初始浓度为10mg/L、初始pH为6.0时,去除率可达98.92%。所得结论显示GO-Al13对Cd(Ⅱ)的去除效果较好。In order to prepare efficient absorbent for Cd（Ⅱ）,polymeric aluminum hydroxyl（Al13）was added into the dispersion of graphite oxide（GO）by direct titration method firstly,and graphite oxide-polymeric aluminum hydroxyl composites（GO-Al13）were synthesized using GO as the matrix.Then,analysis technology such as XRD,FTIR,SEM and so on were used to characterize GO-Al13,and 10 mg GO-Al13 was added into 50 mL Cd（Ⅱ）waste water whose initial concentration was 10mg/L to conduct the adsorption experiments,thus the removal effects of GO-Al13 on Cd（Ⅱ）were investigated.The results show that[Al13]7＋ions will react with oxygen-containing functional groups of GO to form Al—O groups.After adding [Al13]7＋ions into GO,the surface morphologies of GOAl13 will change a lot comparing with GO,irregular concave-convex structures emerge and roughness increases significantly.When the initial concentration of Cd（Ⅱ）in waste water is 10 mg/L and initial pH is 6.0,the removal rate can reach 98.92%.The conclusions obtained indicate that the removal effects of GO-Al13 for Cd（Ⅱ）is preferable.

关 键 词：氧化石墨烯 聚合羟基铝 Cd(Ⅱ) 吸附 循环再生 

分 类 号：TB331[一般工业技术—材料科学与工程] TB332