School of Environment and Architecture, University of Shanghai for Science and Technology, 516 Jun Gong Road, Shanghai, 200093, China.
Environ Sci Pollut Res Int. 2019 Oct;26(29):29908-29916. doi: 10.1007/s11356-019-06106-w. Epub 2019 Aug 13.
As one of the hard-templating methods, MgO-templating was employed to recycle cotton to produce activated carbon with magnesium acetate as MgO precursor. Results showed that cotton carbonized while magnesium acetate decomposed to nanoscale MgO particles based on thermogravimetric and X-ray diffraction analysis. Carbonized residuals of cotton were able to replicate the MgO morphology thus creating pores. The size of MgO varied with impregnation ratio, treatment temperature, and time. Overall, the optimum conditions were MgO/cotton impregnation ratio 0.25, temperature 800 °C, and treatment time 60 min. Cotton-based activated carbon thus produced manifested surface area and total pore volume of 1139 m/g and 0.85 cm/g respectively. Both micropores and mesopores were detected based on iodine, methylene blue adsorption values, and N adsorption-desorption studies.
作为硬模板法之一，采用 MgO 模板法，以乙酸镁作为 MgO 前体，回收棉花生产活性炭。结果表明，基于热重和 X 射线衍射分析，当乙酸镁分解为纳米级 MgO 颗粒时，棉花被碳化。棉花的碳化残留物能够复制 MgO 的形态，从而形成孔。MgO 的尺寸随浸渍比、处理温度和时间而变化。总的来说，最佳条件为 MgO/棉浸渍比为 0.25、温度为 800°C 和处理时间为 60 分钟。由此制备的基于棉的活性炭表现出的比表面积和总孔体积分别为 1139 m/g 和 0.85 cm/g。碘、亚甲基蓝吸附值和氮气吸附-脱附研究均检测到微孔和中孔。
