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- 저자 : Sijie Zhou (검색결과 2 건)
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Reusable, magnetic laser-induced graphene for efficient removal of organic pollutants from water
Jiang Ye,Wan Sijie,Zhao Weiwei,Yu Wenjie,Wang Shuaipeng,Yu Zeqi,Yang Qiu,Zhou Weihua,Liu Xiaoqing 한국탄소학회 2022 Carbon Letters Vol.32 No.4
The hybridization of graphene with magnetic nanoparticles has endowed graphene with increasing interest as the adsorbent for wastewater treatment. However, its fabrication often involves a multi-stepped chemical synthesis process. In this work, we demonstrate a facile, one-step, and solvent-free approach to fabricate Fe3O4 nanoparticle-anchored Laser-Induced Graphene (Fe3O4@LIG) as an efficient adsorbent by direct laser irradiation on a ferric acetylacetonate containing polybenzoxazine film. Raman and X-ray diffraction analysis confirm the graphene component in the adsorbent, and the morphology characterizations show that Fe3O4 nanoparticles are distributed uniformly on LIG with hierarchical meso- and macro-porous structures. Adsorption experiments indicate that Fe3O4@LIG can adsorb methylene blue (MB) from aqueous solutions in a fast and effective manner, with a maximum adsorption capacity up to 350.9 mg/g. The adsorption kinetics and isotherms are also investigated, which are well-described by the pseudo-second-order model and Langmuir model, respectively. Additionally, Fe3O4@LIG is also demonstrated with the efficient removal of a variety of organic solvents from water. The favorable adsorption behavior of Fe3O4@LIG is attributed to its unique porous structure and the molecular interactions with adsorbates. On the other hand, Fe3O4@LIG has high magnetic property, and therefore, it could be easily recovered from water and well regenerated for repeated use. With the efficient adsorption of organic pollutants, magnetic separability, and good recyclability, it is believed that the easy-fabricated Fe3O4@LIG has great potential applications in wastewater treatment.
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Aming Wang,Feng Liu,Liangjun Xia,Chunhua Zhang,Sijie Zhou,Zhuan Fu,Yunli Wang,Weilin Xu 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.103 No.-
Severe effluent pollution and chemical damage to protein fibers generated from conventional aqueousdyeing process have stimulated interest in exploiting sustainable dyeing of wool. Herein, an ethanol(EtOH)-carbon tetrachloride (CCl4)-water (H2O) ternary solvent system was used as the dyeing mediumto protect wool fibers from being damaged in the dyeing process. The wool fibers were firstly pretreatedin an aqueous acid solution, followed by dyeing in the EtOH-CCl4-H2O (45:50:5) ternary solvent systemwith reactive dyes. The results indicated that the acid pretreatment solution could be reused for severaltimes, the samples dyed in the EtOH-CCl4-H2O mixture with the investigated dyes showed higher K/S valuescompared to the conventional approach, implying the increased dye utilization and decreased effluentsdischarge were realized. Furthermore, acceptable permeability, good colorfastness, and satisfactoryleveling properties of the dyed samples were achieved using the developed method. Additionally, thesolvent-assisted dyed samples showed improved mechanical properties compared with the conventionallydyed samples. The dyeing mechanisms of wool fibers in the EtOH-CCl4-H2O mixture were illustratedin detail. The proposed dyeing technology consumes fewer energy, freshwater, and chemicals comparedwith the conventional wool dyeing method. Future work will principally concentrate on the reuse of thedye-contaminated EtOH-CCl4-H2O mixture.
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