Sustainable and scalable in-situ synthesis of hydrochar-wrapped Ti₃AlC₂-derived nanofibers as adsorbents to remove heavy metals

Dong, Xinsheng, Wang, Yaquan, Jia, Mingmin, Niu, Zhaoyang, Cai, Junmeng, Yu, Xi, Ke, Xuebin, Yao, Jianfeng and Zhang, Xingguang (2019) Sustainable and scalable in-situ synthesis of hydrochar-wrapped Ti₃AlC₂-derived nanofibers as adsorbents to remove heavy metals. Bioresource Technology, 282, 222-227. (doi:10.1016/j.biortech.2019.03.010).

Abstract

To ensure a sustainable future, it is imperative to efficiently utilize abundant biomass to produce such as platform chemicals, transport fuels, and other raw materials; hydrochar is one of the promising candidates derived by hydrothermal carbonization of biomass in pressurized hot water. The synthesis of “hydrochar-wrapped Ti₃AlC₂-derived nanofibers” was successfully achieved by a facile one-pot hydrothermal reaction using glucose as the hydrochar precursor. Meanwhile, cellulose and pinewood sawdust as raw materials were also investigated. Products were characterized by XRD, N₂ adsorption-desorption isotherms, SEM, TEM and FT-IR to investigate their crystal structures, textural properties, morphologies, and surface species. In the adsorption test to remove Cd(II) and Cu(II) in aqueous solution, hydrochar-wrapped nanofibers outperformed pure nanofibers derived from Ti₃AlC₂, hydrothermal carbon derived from glucose and commercial activated carbon. Finally, the regeneration, sorption kinetics, and possible adsorption mechanism were also explored.

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Contributors

Author: Xi Yu

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