eprintid: 10137178
rev_number: 14
eprint_status: archive
userid: 608
dir: disk0/10/13/71/78
datestamp: 2021-10-28 09:39:11
lastmod: 2022-08-12 10:00:50
status_changed: 2021-10-28 09:39:11
type: article
metadata_visibility: show
creators_name: Hammad, M
creators_name: Alkan, B
creators_name: Al-kamal, AK
creators_name: Kim, C
creators_name: Ali, MY
creators_name: Angel, S
creators_name: Wiedemann, HTA
creators_name: Klippert, D
creators_name: Schmidt, TC
creators_name: Kay, CWM
creators_name: Wiggers, H
title: Enhanced heterogeneous activation of peroxymonosulfate by Ruddlesden-Popper-type La2CoO4+δ nanoparticles for bisphenol A degradation
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F64
keywords: Heterogeneous catalysis, Spray flame synthesis, Peroxymonosulfate, Sulfate radical, Bisphenol A degradation
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: The scalable synthesis of stable catalysts for environmental remediation applications remains challenging. Nonetheless, metal leaching is a serious environmental issue hindering the practical application of transition-metal based catalysts including Co-based catalysts. Herein, for the first time, we describe a facile one-step and scalable spray-flame synthesis of high surface area La2CoO4+δ nanoparticles containing excess oxygen interstitials (+δ) and use them as a stable and efficient catalyst for activating peroxymonosulfate (PMS) towards the degradation of bisphenol A. Importantly, the La2CoO4+δ catalyst exhibits higher catalytic degradation of bisphenol A (95% in 20 min) and stability than LaCoO3–x nanoparticles (60%) in the peroxymonosulfate activation system. The high content of Co2+ in the structure showed a strong impact on the catalytic performance of the La2CoO4+δ + PMS system. Despite its high specific surface area, our results showed a very low amount of leached cobalt (less than 0.04 mg/L in 30 min), distinguishing it as a material with high chemical stability. According to the radical quenching experiments and the electron paramagnetic resonance technology, SO4[rad]–, [rad]OH, and 1O2 were generated and SO4[rad]– played a dominant role in bisphenol A degradation. Moreover, the La2CoO4+δ + PMS system maintained conspicuous catalytic performance for the degradation of other organic pollutants including methyl orange, rhodamine B, and methylene blue. Overall, our results showed that we developed a new synthesis method for stable La2CoO4+δ nanoparticles that can be used as a highly active heterogeneous catalyst for PMS-assisted oxidation of organic pollutants.
date: 2022-02-01
date_type: published
official_url: https://doi.org/10.1016/j.cej.2021.131447
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 1892808
doi: 10.1016/j.cej.2021.131447
lyricists_name: Kay, Christopher
lyricists_id: CWKAY79
actors_name: Kay, Christopher
actors_id: CWKAY79
actors_role: owner
full_text_status: public
publication: Chemical Engineering Journal
volume: 429
article_number: 131447
citation:        Hammad, M;    Alkan, B;    Al-kamal, AK;    Kim, C;    Ali, MY;    Angel, S;    Wiedemann, HTA;                 ... Wiggers, H; + view all <#>        Hammad, M;  Alkan, B;  Al-kamal, AK;  Kim, C;  Ali, MY;  Angel, S;  Wiedemann, HTA;  Klippert, D;  Schmidt, TC;  Kay, CWM;  Wiggers, H;   - view fewer <#>    (2022)    Enhanced heterogeneous activation of peroxymonosulfate by Ruddlesden-Popper-type La2CoO4+δ nanoparticles for bisphenol A degradation.                   Chemical Engineering Journal , 429     , Article 131447.  10.1016/j.cej.2021.131447 <https://doi.org/10.1016/j.cej.2021.131447>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10137178/1/20211027_La2CoO4_manuscript%20accepted.pdf