摘要
以纳米凹凸棒石为核体,在其表面原位聚合包覆聚吡咯层,制备聚吡咯/凹凸棒石纳米复合材料,并将其用于对阳离子红X-GRL的吸附。结果表明,聚吡咯/凹凸棒石纳米复合材料对X-GRL的吸附动力学符合准二级动力学方程,吸附热力学符合Langmuir等温吸附方程;最大吸附量为113.629mg.g-1,吸附焓变为18.66kJ.mol-1,吸附自由能变在-27.18~-35.14kJ.mol-1之间,吸附熵变约为151J.mol-1.K-1。吸附过程为吸热过程,聚吡咯/凹凸棒石纳米复合材料对X-GRL的吸附是物理和化学吸附并存的过程。
The polypyrrole/attapulgite nanocomposites were prepared via in-situ polymerization of pyrrole monomer on the surface of ATP. The prepared nanocomposites were applied in the adsorption experiments of cationic red dye X- GRL. The results showed that XGRL adsorption on PPy/ATP nanocomposites fired the law of pseudo-second order kinet- ics, and the thermodynamics of X-GRL adsorption on the nanocomposites followed the isothermal adsorption equations of Langmuir. The maximum adsorption capacity could reach 113. 629mg ·g^-1. The Gibbs free energy and adsorption enthalpy were 18. 66kJ· mol ^-1 and -27.18--35.14kJ ·mol^-1 respectively,and the adsorption entropy was 151J ·mol^-1 · K^-1. The adsorption of cationic red dye was the coexistence of physical and chemical adsorption process and it was an endother- real process.
出处
《化工新型材料》
CAS
CSCD
北大核心
2012年第5期125-128,共4页
New Chemical Materials
基金
江苏省高校自然科学研究重大项目(09KJA430002)
2010年度高校科研成果产业化推进工程(JH10-53)
江苏省产学研前瞻性联合研究项目(BY2010123)
江苏省科技企业创新资金(BC201049)
江苏省六大人才高峰(2010-C-4)
江苏省科技支撑计划(BE2011125
BE2011663)
江苏省高校科技创新团队资金(2011-24)
常州市科技支撑计划(工业
CE20110017)
关键词
聚吡咯
凹凸棒石
阳离子红
吸附
polypyrrole, attapulgite, cationic red dye, adsorption