摘要
采用绿色的化学还原法以明胶作为还原剂和保护剂合成了具有良好水溶分散性及大比表面积的明胶功能化的石墨烯(gelatin-G)。将gelatin-G用于对罗丹明B(RB)的吸附动力学研究,系统考察了吸附动力学、吸附等温线、pH值、温度及盐效应对吸附性能的影响。利用吸附模型对RB在gelatin-G上吸附平衡的模拟表明RB在gelatin-G上的吸附过程是静电相互作用的结果。最大吸附容量可达106.6 mg·g-1,其吸附动力学完全符合拟二级吸附动力学模型,化学吸附为速率控制步骤。
Gelatin functionalized graphene（gelatin-G） was prepared using gelatin as reduce and functionalized agent through a green chemical reduction synthesis method. As-prepared gelatin-G had well dispersity and large special surface area which could increase the loading amount of adsorbent. In this work, gelatin-G was used to study the adsorption dynamics of rhodamine B on which. Futh- ermore, the adsorption isotherms, pH value, temperature and salt effect were also investigated systematically. The fitting results of ad- sorption model suggested that the adsorption equilibrium of RB on gelatin-G was based on the electrostatic interaction with the maxi- mum adsorption capacity of 106. 6 rag. g-1. The adsorption dynamics was consistent with the pseudo-second-order kinetics model and the chemisorption was the rate-limiting step in whole adsorption procedure.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2013年第7期1006-1011,共6页
Chemical Research and Application
基金
国家重大科学仪器设备开发专项(2011YQ030113)子任务三(2011YQ0301130103)资助
成都大学校基金项目(2012XJZ12)资助
关键词
明胶
石墨烯
罗丹明B
吸附
动力学
gelatin
graphene
rhodamine B
adsorption
dynamics
