eprintid: 13031
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/30/31
datestamp: 2023-11-10 03:27:35
lastmod: 2023-11-10 03:27:35
status_changed: 2023-11-10 01:50:10
type: article
metadata_visibility: show
creators_name: Zaeni, J.R.J.
creators_name: Lim, J.-W.
creators_name: Wang, Z.
creators_name: Ding, D.
creators_name: Chua, Y.-S.
creators_name: Ng, S.-L.
creators_name: Oh, W.-D.
title: In situ nitrogen functionalization of biochar via one-pot synthesis for catalytic peroxymonosulfate activation: Characteristics and performance studies
ispublished: pub
keywords: Chemical activation; Doping (additives); Metabolism; Morphology; Nitrogen; Organic pollutants; Specific surface area; Surface chemistry; Urea; Wood, Bio chars; Nitrogen-doping; Nonradical pathway; Peroxymonosulfate; Wood residues, Catalyst activity
note: cited By 76
abstract: A facile and scalable one-pot synthesis method was designed to fabricate N-doped biochar from wood residue for peroxymonosulfate (PMS) activation. The urea:wood residue w/w ratio was varied from 0:1 to 100:1, and the intrinsic (surface chemistry) and extrinsic (morphology, specific surface area, etc.) properties of the N-doped biochar were systematically investigated. Notably, the urea:wood residue w/w ratio played a significant role in tuning the N species composition in the N-doped biochar. A higher urea:wood residue w/w ratio resulted in greater at. of graphitic N and higher specific surface area. The results show that the catalyst prepared with urea:wood residue w/w ratio of 100:1 (NC800-20) manifested the greatest catalytic activity as PMS activator for organics removal due to its highly favorable combination of intrinsic (highest at. graphitic N) and extrinsic (excellent specific surface area) properties. The catalyst loading, PMS dosage and pH were found to be operationally crucial for PMS activation. Under the best condition, the NC800-20 can be used to degrade various organic pollutants. The recyclability of NC800-20 was studied and while the catalytic activity gradually deteriorated over successive cycles, it can be completely restored by simple calcination at 500 °C. The used catalyst was extensively characterized, revealing insights into the mechanism of PMS activation. The prevailing mechanism for PMS activation was the nonradical pathway. Overall, this research provides insights into preparing N-doped biochar with favorable extrinsic and intrinsic properties from biowaste for sustainable pollutant removal via PMS activation. © 2020 Elsevier B.V.
date: 2020
publisher: Elsevier B.V.
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85079423661&doi=10.1016%2fj.seppur.2020.116702&partnerID=40&md5=caee73385304a882fb30562acb2c8cb9
id_number: 10.1016/j.seppur.2020.116702
full_text_status: none
publication: Separation and Purification Technology
volume: 241
refereed: TRUE
issn: 13835866
citation:   Zaeni, J.R.J. and Lim, J.-W. and Wang, Z. and Ding, D. and Chua, Y.-S. and Ng, S.-L. and Oh, W.-D.  (2020) In situ nitrogen functionalization of biochar via one-pot synthesis for catalytic peroxymonosulfate activation: Characteristics and performance studies.  Separation and Purification Technology, 241.   ISSN 13835866