Zhao Hongjie, Wang Ran, Deng Huizhen, Zhang Lijun, Gao Lili, Zhang Lexin, Jiao Tifeng
Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, 438 West Hebei Street, Qinhuangdao 066004, P. R. China.
State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, 38 West Hebei Street, Qinhuangdao 066004, P. R. China.
ACS Omega. 2020 Dec 21;6(1):294-300. doi: 10.1021/acsomega.0c04565. eCollection 2021 Jan 12.
In this work, a new nanocomposite based on octa-amino polyhedral oligomeric silsesquioxanes (POSS), carbon nanotubes (CNTs), and chitosan (CS) was synthesized and used for wastewater treatment. The properties and morphologies of the prepared composite were analyzed by X-ray diffraction, scanning electron microscopy, transmission electron microscope, thermogravimetric, and atomic force microscopy. The results showed that POSS, CNTs, and CS formed a stable composite through intermolecular forces, and the modification of CS by POSS and CNTs improved its stability. In addition, the obtained composite showed good adsorption performance for the degradation of methyl orange and Congo red dyes. The pseudo-first-order model and pseudo-second-order model were used to analyze the adsorption data, and the results showed that the adsorption process conforms to the kinetic model. Moreover, the maximum adsorption capacity of the composite to methyl orange and Congo red reached 63.23 and 314.97 mg/g, respectively. This work provides new ideas for the preparation of self-assembled multi-composite and their potential applications in wastewater treatment.
在这项工作中，合成了一种基于八氨基多面体低聚倍半硅氧烷（POSS）、碳纳米管（CNT）和壳聚糖（CS）的新型纳米复合材料，并将其用于废水处理。通过X射线衍射、扫描电子显微镜、透射电子显微镜、热重分析和原子力显微镜对制备的复合材料的性能和形貌进行了分析。结果表明，POSS、CNT和CS通过分子间作用力形成了稳定的复合材料，POSS和CNT对CS的改性提高了其稳定性。此外，所得复合材料对甲基橙和刚果红染料的降解表现出良好的吸附性能。采用伪一级模型和伪二级模型对吸附数据进行分析，结果表明吸附过程符合动力学模型。此外，该复合材料对甲基橙和刚果红的最大吸附容量分别达到63.23和314.97 mg/g。这项工作为自组装多复合材料的制备及其在废水处理中的潜在应用提供了新的思路。
