Oxygen Vacancy-Mediated CuCoFe/Tartrate-LDH Catalyst Directly Activates Oxygen to Produce Superoxide Radicals: Transformation of Active Species and Implication for Nitrobenzene Degradation DOI
Shaohong Wang,

Jiayi Zhu,

Ting Li

et al.

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(12), P. 7924 - 7934

Published: May 19, 2022

Oxygen vacancies play a vital role in the catalytic activity of layered double hydroxide (LDH) catalysts wastewater treatment. However, mechanism oxygen vacancy-mediated LDH-activated to produce reactive species (ROS) still lacks reasonable explanation. In this work, tartrate-modified CuCoFe-LDH (CuCoFe/Tar-LDH) with abundant was designed, which can efficiently degrade nitrobenzene (NB) under room conditions. The technical energy consumption is 0.011 kW h L–1. According characterization and calculation results, it proposed that are formed because deficiency caused by reduction between metal ion oxygen, transitions lower state. Compared CuCoFe-LDH, vacancy formation CuCoFe/Tar-LDH decreased from 1.98 1.13 eV. O2 bond length adsorbed on 1.27 Å, close theoretical superoxide radicals (•O2–) (1.26 Å). Radical trapping experiments electron spin-resonance spectroscopy spectrum prove •O2– an important precursor •OH. This work dedicated in-depth exploration catalyst activation for molecular conversion relationship ROS.

Language: Английский

Defect engineering of BiOX (X = Cl, Br, I) based photocatalysts for energy and environmental applications: Current progress and future perspectives DOI
Vinoth Kumar Selvaraj, Wee‐Jun Ong, Alagarsamy Pandikumar

et al.

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 464, P. 214541 - 214541

Published: April 13, 2022

Language: Английский

Citations

153
Modulation of Charge Trapping by Island‐like Single‐Atom Cobalt Catalyst for Enhanced Photo‐Fenton‐Like reaction DOI Creative Commons

Mengying Qian,

Xi‐Lin Wu,

Meichi Lu

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(12)

Published: Jan. 6, 2023

Abstract Composites‐based photocatalysis relies on the interfacial electron transfer between metallic cocatalyst and photosensitizer (the semiconductor) to realize spatial separation of charge carriers. Herein, an ingenious heterojunction Co‐CN single atom catalysts (SACs) g‐C 3 N 4 is constructed for heterogeneous photo‐Fenton‐like reactions. Driven by built‐in electric field across heterojunctions, migration photogenerated carriers promoted, leading fast from SACs. Theoretical calculations transient absorption spectroscopy reveal modulated trapping in SA‐Co‐CN/g‐C heterostructure, resulting remarkably enhanced generation reactive oxygen species via peroxymonosulfate activation under light irradiation. This /PMS/vis system efficient oxidation various antibiotics with high removal efficiency (>98%), a wide operating pH range (pH 3–11) excellent stability long‐term operation. study provides new tactic rational design SACs‐based heterojunctions bridge catalysis, attaining superior photoredox activity coupling.

Language: Английский

Citations

151
Origin of the Excellent Activity and Selectivity of a Single-Atom Copper Catalyst with Unsaturated Cu-N2 Sites via Peroxydisulfate Activation: Cu(III) as a Dominant Oxidizing Species DOI
Fan Li,

Zhicong Lu,

Tong Li

et al.

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(12), P. 8765 - 8775

Published: May 12, 2022

As an efficient active oxidant for the selective degradation of pollutants in wastewater, high-valent copper species Cu(III) with persulfate activation has attracted substantial attention some Cu-based catalysts. However, systematic study a catalyst structure and mechanism about peroxydisulfate (PDS) is challenging owing to coexistence multiple Cu structural symmetry PDS. Herein, we anchored atom two pyridinic N atoms synthesize single-atom (CuSA-NC). Experimental characterizations theoretical calculations complemented each other well because uniform atomic sites. The was identified as site, unsaturated Cu-N2 configuration more conductive PDS than saturated Cu-N4 configuration. Benefiting from generation Cu(III), CuSA-NC exhibited obvious anti-interference performance pollutant complex matrix. superior catalytic activity compared that reported catalysts good durability continuous-flow experiment further revealed potential practical applications. This work strongly deepens understanding sites under develops approach actual water purification.

Language: Английский

Citations

142
Facile synthesis of oxygen vacancies enriched α-Fe2O3 for peroxymonosulfate activation: A non-radical process for sulfamethoxazole degradation DOI
Qingdong Qin, Ting Liu, Jiaxuan Zhang

et al.

Journal of Hazardous Materials, Journal Year: 2021, Volume and Issue: 419, P. 126447 - 126447

Published: June 20, 2021

Language: Английский

Citations

136
Oxygen vacancies-enriched Cu/Co bimetallic oxides catalysts for high-efficiency peroxymonosulfate activation to degrade TC: Insight into the increase of Cu+ triggered by Co doping DOI
Lei Liu,

Chunjiang Han,

Guofang Ding

et al.

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 450, P. 138302 - 138302

Published: July 25, 2022

Language: Английский

Citations

127
Cu-doped Ni-LDH with abundant oxygen vacancies for enhanced methyl 4-hydroxybenzoate degradation via peroxymonosulfate activation: key role of superoxide radicals DOI
Jingyi Zhu, Yixin Zhu,

Wenjun Zhou

et al.

Journal of Colloid and Interface Science, Journal Year: 2021, Volume and Issue: 610, P. 504 - 517

Published: Nov. 19, 2021

Language: Английский

Citations

119
Facilitating Redox Cycles of Copper Species by Pollutants in Peroxymonosulfate Activation DOI

Xueyue Mi,

Hui Zhong, Hongxiang Zhang

et al.

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(4), P. 2637 - 2646

Published: Jan. 28, 2022

The redox behavior of metal active sites determines the rate heterogeneous catalysis in peroxymonosulfate activation. Previous reports focused on construction catalysts for accelerating interfacial electron transfer. In this work, a new strategy was proposed facilitating valence cycles Cu+/Cu2+ by using pollutants. 2.5Cu/CeO2/PMS system capable achieving efficient removal pollutants, including tetracycline, oxytetracycline, and rhodamine B, wide pH working range. presence Cu-N bond formed between -NH2 group tetracycline Cu site catalyst, showing that coordination changed to CuO4N1. charge CuO4N1 rearranged, making it easier obtain electrons promote PMS oxidation, thereby reduction Cu2+ Cu+ activation showed excellent sustainability selectivity organic This study provides novel routine utilizing pollutants accelerate species.

Language: Английский

Citations

117
Fe-Mn oxycarbide anchored on N-doped carbon for enhanced Fenton-like catalysis: Importance of high-valent metal-oxo species and singlet oxygen DOI Open Access

Yangzhuo He,

Hong Qin, Ziwei Wang

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 340, P. 123204 - 123204

Published: Aug. 22, 2023

Language: Английский

Citations

116
Selective formation of reactive oxygen species in peroxymonosulfate activation by metal-organic framework-derived membranes: A defect engineering-dependent study DOI

Mohua Li,

Shijie You, Xiaoguang Duan

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 312, P. 121419 - 121419

Published: April 16, 2022

Language: Английский

Citations

113
Bismuth-rich strategy intensifies the molecular oxygen activation and internal electrical field for the photocatalytic degradation of tetracycline hydrochloride DOI
Wenhai Zhang, Yiyin Peng, Yajing Yang

et al.

Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 430, P. 132963 - 132963

Published: Oct. 19, 2021

Language: Английский

Citations

112