Department of Mechanical and Energy Engineering, University of North Texas, Denton, TX 76203, USA.
Department of Mechanical and Energy Engineering, University of North Texas, Denton, TX 76203, USA; College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China.
J Colloid Interface Sci. 2018 May 15;518:41-47. doi: 10.1016/j.jcis.2018.02.017. Epub 2018 Feb 7.
Self-activation was employed for the manufacturing of activated carbon (AC) using kenaf core fibers, which is more environmentally friendly and cost-effective than the conventional physical/chemical activations. It makes the use of the gases emitted from the thermal treatment to activate the converted carbon itself. The mechanism was illustrated by the Fourier transform infrared spectroscopy and mass spectrometry analysis of the emitted gases, showing that CO served as an activating agent. The AC from self-activation presented high performance, for instance, the Brunauer-Emmett-Teller surface area was up to 2296 m g, Using the Density Functional Theory (DFT), the pore volume (PV) was determined to be 1.876 cm g. Linear relations of PV/iodine number, and PV/tannin value were established, indicating a strong relationship between the pore structure of AC and its adsorbing preference. Adsorption results for copper (II) and rhodamine 6G also indicated that the pore size of AC should be designed based on the molecular size of the contaminants.
自活化法被用于利用麻纤维制造活性炭（AC），与传统的物理/化学活化相比，这种方法更加环保且经济高效。它利用热处理过程中释放的气体来激活转化后的碳本身。通过对释放气体的傅里叶变换红外光谱和质谱分析，说明了这一机制，表明 CO 是一种有效的活化剂。自活化制备的 AC 具有优异的性能，例如，BET 比表面积高达 2296 m²/g。通过密度泛函理论（DFT）计算，得到孔体积（PV）为 1.876 cm³/g。建立了 PV/碘值和 PV/鞣酸值的线性关系，表明 AC 的孔结构与其吸附偏好之间存在很强的关系。对铜（II）和罗丹明 6G 的吸附结果也表明，AC 的孔径应根据污染物的分子大小进行设计。
