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首页> 外文期刊>RSC Advances >Facile synthesis of mesoporous carbon nanocomposites from natural biomass for efficient dye adsorption and selective heavy metal removal
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Facile synthesis of mesoporous carbon nanocomposites from natural biomass for efficient dye adsorption and selective heavy metal removal

机译：自然生物质中介孔碳纳米复合材料的体积合成高效染料吸附和选择性重金属去除

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Mesoporous carbon with embedded iron carbide nanoparticles was successfully synthesized via a facile impregnation–carbonization method. A green biomass resource, cotton fabric, was used as a carbon precursor and an iron precursor was implanted to create mesopores through a catalytic graphitization reaction. The pore structure of the nanocomposites can be tuned by adjusting the iron precursor loadings and the embedded iron carbide nanoparticles serve as an active component for magnetic separation after adsorption. The microstructure of the nanocomposites was carefully investigated by various characterization techniques including electron microscopy, X-ray diffraction, surface analyzer, magnetic property analyzer and etc. The newly created mesopores are demonstrated as a critical component to enhance the adsorption capacity of organic dyes and embedded iron carbide nanoparticles are responsible for the selective removal of heavy metal ions (Zn ~(2+) , Cu ~(2+) , Ni ~(2+) , Cr ~(6+) and Pb ~(2+) ). Isotherm adsorption, kinetic study at three different temperatures (25, 45 and 65 °C) and cycling retention tests were performed to understand the adsorptive behavior of the nanocomposites with organic dyes (methylene blue and methyl orange). Together with the preferable removal of more toxic heavy metal species (Cr ~(6+) and Pb ~(2+) ), these mesoporous nanocomposites show promising applications in pollutant removal from water. The facile material preparation allows convenient scale-up manufacturing with low cost and minimum environmental impact.
机译：通过容易浸渍 - 碳化法成功地合成了具有嵌入碳化铁碳化锂纳米颗粒的中孔碳。使用绿色生物质资源，棉织物用作碳前体，植入铁前体通过催化石墨化反应产生中孔。通过调节铁前体载体和嵌入的碳化铁纳米粒子作为吸附后的磁性分离的活性组分，可以调节纳米复合材料的孔结构。通过各种表征技术仔细研究了纳米复合材料的微观结构，包括电子显微镜，X射线衍射，表面分析仪，磁性分析仪等。新创建的中孔被证明作为提高有机染料和嵌入式吸附容量的关键组分碳化铁纳米粒子负责选择性除去重金属离子（Zn〜（2+），Cu〜（2+），Ni〜（2+），Cr〜（6+）和Pb〜（2+））。在三种不同温度（25,45和65℃）的Isotherm吸附，动力学研究进行了与循环保留试验，以了解纳米复合材料与有机染料（亚甲基蓝色和甲基橙）的吸附行为。与更毒性重金属物质（Cr〜（6+）和Pb〜（2+）的优选除去，这些介孔纳米复合材料显示出在水中污染物的污染物中的应用。便利材料制备允许方便的放大制造，以低成本和最小的环境影响。

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