In-situ growth of ZIF-8/CP with ultra-high adsorption capacity for removing Malachite green from water

IF 5.5 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY Carbon Letters Pub Date : 2023-11-08 DOI:10.1007/s42823-023-00583-3

Jie Lou, Qiuping Fu, Lei Yu, Hui Yuan, Jie Zhao, Xinde Wei, Tong Wang, Changli Mo

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Abstract

An environmentally friendly and low-cost chitosan-containing polysaccharide (CP) composite ZIF-8/CP was designed and prepared based on the difficulty of separating the traditional adsorbent from the water phase. ZIF-8/CP was synthesized through in-situ growth approach. The physical, chemical and structure properties of ZIF-8/CP were determined through a series of characterization methods, including SEM, FT-IR and PXRD. The effects of touch time, pH, temperature, and co-existing ions on adsorption were assessed. In addition, kinetics, isotherms of adsorption and thermodynamics were examined. The data of isotherms for adsorption indicated that the adsorption of ZIF-8/CP on MG was similar to the Langmuir model, with a maximum adsorption capacity of 1428.57 mg/g. Moreover, the kinetic parameters were consistent with the pseudo-2nd-order equation. Thermodynamic studies (ΔG < 0, ΔH > 0) demonstrated a heat-absorbing and spontaneous adsorption process. Our study reveals that ZIF-8/CP has good adsorption properties and environmental properties.

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具有超高吸附能力的ZIF-8/CP原位生长去除水中孔雀石绿

针对传统吸附剂难以与水相分离的问题，设计并制备了一种环保、低成本的壳聚糖多糖复合材料ZIF-8/CP。采用原位生长法合成ZIF-8/CP。通过SEM、FT-IR和PXRD等一系列表征方法对ZIF-8/CP的物理、化学和结构性质进行了表征。考察了接触时间、pH、温度和共存离子对吸附的影响。此外，还研究了吸附动力学、等温线和热力学。吸附等温线数据表明，ZIF-8/CP对MG的吸附与Langmuir模型相似，最大吸附量为1428.57 MG /g。动力学参数符合拟二阶方程。热力学研究(ΔG < 0， ΔH > 0)证明了吸热和自发吸附过程。研究表明，ZIF-8/CP具有良好的吸附性能和环境性能。

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.