Qiong Chen , You-liang Ma , Zhong-min Feng , Jia-li Li , Yun Wang , Ting Sun
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Nano-ZnO/ nitrogen self-doped hierarchically porous graphite-like carbon derived from Astragalus residue toward effective removal of phenol
Background
Preparing porous carbon with rich pore structure and heteroatom doping is still the key issue for developing and utilizing biomass-based carbon materials.
Methods
Nano-ZnO/nitrogen self-doped hierarchically porous graphite-like carbon (AZC-700) was prepared from Astragalus residue by pyrolysis and used to adsorb phenol.
Significant Findings
AZC-700 showed a specific surface area of 1149 m2 g−1, hierarchical micro-/mesoporous structure, and adsorption capacity of 163.36 mg g−1 on phenol, which was better than those of reported biochar. AZC-700 could remove 90.09 % phenol with low initial concentration (5 mg L−1) in spiked Nanhu water to reach discharge standard, and it could maintain 89 % of the initial adsorption capacity after five cycles. ZnO nanoparticles anchored on AZC-700 as the spacer inhibited the stack of graphite-like. Self-doped nitrogen adsorbed phenol via π-π EDA, Lewis acid-base, hydrogen bond, and complexation. This study not only effectively utilized Astragalus residue, but also provided an efficient adsorbent for removing phenol.
期刊介绍:
Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.