一种新型的废物衍生介孔碳结构的制备和表征，用于在环境条件下超高吸附苯和甲苯。,Journal of Hazardous Materials

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一种新型的废物衍生介孔碳结构的制备和表征，用于在环境条件下超高吸附苯和甲苯。
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2019-09-25 , DOI: 10.1016/j.jhazmat.2019.121317
Neda Haj Mohammad Hossein Tehrani ₁ , Masood S Alivand ₂ , Alimorad Rashidi ₃ , Kobra Rahbar Shamskar ₃ , Mohammad Samipoorgiri ₄ , Mehdi D Esrafili ₅ , Davood Mohammady Maklavany ₃ , Marzieh Shafiei-Alavijeh ₃

Affiliation

在这项工作中，使用伊朗沥青质作为低成本碳源并用三聚氰胺作为新型富氮促进剂（M-IANC）合成了一系列纳米多孔碳材料。用室内仪器在低浓度和高浓度下测量苯和甲苯在合成的M-IANC上的吸附能力。结果表明，三聚氰胺的添加显着增加了纳米孔碳结构中的中孔体积（高达1.61 cm3 / g），随后产生了较大的表面积（2692 m2 / g）和孔体积（1.71 cm3 / g）。。所得的M-IANC-C纳米结构（三聚氰胺：PIA质量比为1：2）分别显示出对苯和甲苯的吸附能力为228.18 wt。％和82.08 wt。％，分别比市售活性炭高19.4和2.8倍。除了对苯和甲苯的去除具有明显的吸附性能外，M-IANC-C在连续四个循环后比未改性的IANC样品具有更高的循环吸附能力。还通过密度泛函理论（DFT）计算研究了三聚氰胺的吸附机理以及三聚氰胺在苯和甲苯吸附中的作用。除了碳源（沥青质）的廉价成本外，结果还表明M-IANC可能是VOC吸附的合适候选者。

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Preparation and characterization of a new waste-derived mesoporous carbon structure for ultrahigh adsorption of benzene and toluene at ambient conditions.

In this work, a series of nanoporous carbon materials were synthesized using Iranian asphaltene as a low-cost carbon source and modified by melamine as a new nitrogen-rich promoter (M-IANC). The adsorption capacity of benzene and toluene on the synthesized M-IANCs was measured at low and high concentrations by an in-house built apparatus. The results demonstrated that the addition of melamine remarkably increased the mesoporous volume (up to 1.61 cm3/g) in the nanoporous carbon structure and, subsequently, created a large surface area (2692 m2/g) and pore volume (1.71 cm3/g). The resulting M-IANC-C nanostructure (melamine:PIA mass ratio of 1:2) depicted 228.18 wt.% and 82.08 wt.% adsorption capacity for benzene and toluene, respectively, which were 19.4 and 2.8 times higher than commercial activated carbon. In addition to the distinguished adsorptive behavior for benzene and toluene removal, M-IANC-C exhibited higher cyclic adsorption capacity than those of unmodified IANC sample after four consecutive cycles. The adsorption mechanism and the role of melamine groups in the adsorption of benzene and toluene were also studied by the density functional theory (DFT) calculations. Besides the inexpensive cost of the carbon source (asphaltene), results also indicate that the M-IANC can be a suitable candidate for VOC adsorption.

更新日期：2019-09-26

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