Maruthapandi Moorthy, Kumar Vijay Bhooshan, Luong John H T, Gedanken Aharon
Bar-Ilan Institute for Nanotechnology and Advanced Materials, Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel.
School of Chemistry, University College Cork, Cork T12 K8AF, Ireland.
ACS Omega. 2018 Jul 2;3(7):7196-7203. doi: 10.1021/acsomega.8b00478. eCollection 2018 Jul 31.
This work unraveled kinetics, isotherm, and thermodynamic properties of methylene blue (MB) adsorbed on polyaniline (PANI) and polypyrrole (PPY). The two polymers, PANI and PPY, synthesized by a facile C-dot (CD)-initiated polymerization method have been proven as the effective adsorbent materials to remove MB from wastewater. This dye model is also generally employed as a redox indicator in analytical chemistry and exhibits blue in an oxidizing environment, but it is colorless when exposed to a reducing agent. The effects of temperature, adsorbent amount contact time, and dye concentration were consistently examined. The adsorption capacity of the polymers at 28 °C could reach 19.2 mg/g. The adsorption equilibrium of the dye was attained after 90 and 120 min of contact time with PANI and PPY, respectively. The equilibrium details were well described by Freundlich and Langmuir isotherms. Results showed that PANI and PPY prepared using CD-initiated polymerization are better adsorbents compared to the commercial PANI powder for the removal of MB from water.
这项工作揭示了吸附在聚苯胺（PANI）和聚吡咯（PPY）上的亚甲基蓝（MB）的动力学、等温线和热力学性质。通过简便的碳点（CD）引发聚合方法合成的两种聚合物PANI和PPY，已被证明是从废水中去除MB的有效吸附材料。这种染料模型在分析化学中也通常用作氧化还原指示剂，在氧化环境中呈蓝色，但暴露于还原剂时则无色。持续考察了温度、吸附剂用量、接触时间和染料浓度的影响。聚合物在28℃时的吸附容量可达19.2mg/g。染料与PANI和PPY的接触时间分别在90分钟和120分钟后达到吸附平衡。Freundlich和Langmuir等温线很好地描述了平衡细节。结果表明，与市售PANI粉末相比，采用CD引发聚合制备的PANI和PPY是从水中去除MB的更好吸附剂。
