摘要
利用亲核取代反应制备L-色氨酸功能化氧化石墨烯(GO/L-Trp)并考察了其对Ni2+的吸附效果。通过全反射傅里叶红外光谱(ATR-FTIR)和X射线衍射(XRD)等分析方法对GO/L-Trp的结构进行了表征。考察了吸附时间和重金属离子浓度对吸附效果的影响并对吸附动力学和等温线进行了探究。结果表明,L-Trp成功通过亲核取代反应连接到GO平面上。当吸附剂含量为10 mg,p H为8且吸附时间为480 min时,GO/L-Trp对Ni2+的吸附百分率为88%。该吸附反应符合二级动力学模型且为单层吸附,其最大吸附容量为91.4 mg/g。
L-Tryptophan stitution reaction and its functionalized graphene oxide （GO/L-Trp） was synthesized via nucleophilic subadsorption performance for Ni^2＋ was investigated. The structure of GO/L-Trp was characterized by ATR-FTIR and XRD. Effects of mass of adsorbent, pH, contact time and initial metal ion concentration were explored. Moreover, adsorption kinetic, and isotherms were also investigated. Results showed that L-Trp was successfully connected to the plane of GO. The adsorption percentage of GO/L-Trp for Ni^2＋was 88% in the condition that mass of adsorbent is 10 mg,pH 8 and contact time was 480 min. The adsorption followed the Lagergren pseudo-second-order kinetic model and the adsorption process was monolayer coverage,with adsorption capacity of 91.4 mg/g.
出处
《应用化工》
CAS
CSCD
北大核心
2015年第8期1399-1402,1406,共5页
Applied Chemical Industry
基金
国家自然科学基金(21402066)
