Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

A sustainable biochar catalyst synergized with copper heteroatoms and CO2 for singlet oxygenation and electron transfer routes

Authors
Wan, ZhonghaoSun, YuqingTsang, Daniel C. W.Yu, Iris K. M.Fan, JiajunClark, James H.Zhou, YaoyuCao, XindeGao, BinOk, Yong Sik
Issue Date
7-9월-2019
Publisher
ROYAL SOC CHEMISTRY
Citation
GREEN CHEMISTRY, v.21, no.17, pp.4800 - 4814
Indexed
SCIE
SCOPUS
Journal Title
GREEN CHEMISTRY
Volume
21
Number
17
Start Page
4800
End Page
4814
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/62893
DOI
10.1039/c9gc01843c
ISSN
1463-9262
Abstract
We have developed a wood waste-derived biochar as a sustainable graphitic carbon catalyst for environmental remediation through catalytic pyrolysis under the synergistic effects between Cu heteroatoms and CO2, which for the first time are found to significantly enhance the oxygen functionalities, defective sites, and highly ordered sp(2)-hybridized carbon matrix. The copper-doped graphitic biochars (Cu-GBCs) were further characterized by XRD, FTIR, Raman, XPS, etc., revealing that the modified specific surface area, pore structure, graphitization, and active sites (i.e., defective sites and ketonic group) on the Cu-GBCs corresponded to the synergistic Cu species loading and Cu-induced carbon-matrix reformation in CO2 environment during pyrolysis. The catalytic ability of Cu-GBCs was evaluated using the ubiquitous peroxydisulfate (PDS) activation system for the removal of various organic contaminants (i.e., rhodamine B, phenol, bisphenol A, and 4-chlorophenol), and gave the highest degradation rate of 0.0312 min(-1) in comparison with those of pristine GBCs and N-2-pyrolyzed Cu-GBCs ranging from 0.0056 to 0.0094 min(-1). The synergistic effects were attributed to the encapsulated Cu heteroatoms, evolved ketonic groups, and abundant unconfined pi electrons within the carbon lattice. According to scavenger experiments, ESR analysis, and two-chamber experiments, selective and sustainable non-radical pathways (i.e., singlet oxygenation and electron transfer) mediated by the Cu-induced metastable surface complex were achieved in the Cu-GBC/PDS system. This study offers the first insights into the efficacy, sustainability, and mechanistic roles of Cu-GBCs as an emerging carbon-based catalyst for green environmental remediation.
Files in This Item
There are no files associated with this item.
Appears in
Collections
College of Life Sciences and Biotechnology > Division of Environmental Science and Ecological Engineering > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Altmetrics

Total Views & Downloads

BROWSE