eprintid: 10157647
rev_number: 13
eprint_status: archive
userid: 699
dir: disk0/10/15/76/47
datestamp: 2022-10-20 06:57:54
lastmod: 2023-10-14 06:10:11
status_changed: 2022-10-20 06:57:54
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Zhu, Lingli
creators_name: Shen, Dekui
creators_name: Hong Luo, Kai
title: Lignin-derived carbon quantum dots-decorated Bi7O9I3 nanosheets with enhanced photocatalytic performance: Synergism of electron transfer acceleration and molecular oxygen activation
ispublished: pub
divisions: C05
divisions: F45
divisions: B04
divisions: UCL
keywords: CQDs/Bi7O9I3 composite, 
Photocatalytic degradation, 
Tetracycline hydrochloride, 
Photocatalytic mechanism
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: The design and development of high-efficient photocatalysts are confined by the limited light-harvesting capacity and rapid electron-hole recombination. The Bi7O9I3 nanosheets decorated by lignin-derived carbon quantum dots (CQDs) were prepared through a facile hydrothermal process, which was applied for the photocatalytic degradation of tetracycline hydrochloride (TC). The prepared CQDs/Bi7O9I3 composite with 3% CQDs content (CQDs/Bi7O9I3-3) showed the optimal photocatalytic degradation efficiency of 100% for TC under 300 W Xe lamp irradiation within 45 min. The corresponding degradation rate was 0.08133 min−1, which was 4.74 times higher than that of pure Bi7O9I3. The superoxide radicals (radical dotO2−) and holes (h+) were identified as the key reactive species for TC degradation through the photocatalytic mechanism exploration. The photocatalytic activity of CQDs/Bi7O9I3-3 composite could maintain above 80% after five recycles of degradation reaction, signifying its outstanding stability and reusability. The superior photocatalytic performance of CQDs/Bi7O9I3-3 is explained by the enhanced sunlight harvesting ability, accelerated electron transfer, and the formation of reactive species after the incorporation of CQDs. This work offers a promising strategy for constructing high-performance and environmentally friendly photocatalysts for water pollution treatment through the decoration of biomass-derived CQDs.
date: 2023-01-15
date_type: published
publisher: Elsevier BV
official_url: https://doi.org/10.1016/j.apsusc.2022.155273
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 1983037
doi: 10.1016/j.apsusc.2022.155273
lyricists_name: Luo, Kai
lyricists_id: KLUOX54
actors_name: Luo, Kai
actors_id: KLUOX54
actors_role: owner
full_text_status: public
publication: Applied Surface Science
volume: 608
article_number: 155273
citation:        Zhu, Lingli;    Shen, Dekui;    Hong Luo, Kai;      (2023)    Lignin-derived carbon quantum dots-decorated Bi7O9I3 nanosheets with enhanced photocatalytic performance: Synergism of electron transfer acceleration and molecular oxygen activation.                   Applied Surface Science , 608     , Article 155273.  10.1016/j.apsusc.2022.155273 <https://doi.org/10.1016/j.apsusc.2022.155273>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10157647/3/Luo_Luo%202022%20Applied%20Surface%20Science%20Nanosheets%20accepted_red.pdf