0D carbon dots intercalated Z-scheme CuO/g-C3N4 heterojunction with dual charge transfer pathways for synergetic visible-light-driven photo-Fenton-like catalysis

Abstract

Photo-Fenton-like catalysis allows development of novel advanced oxidation technology with promising application in wastewater treatment. In this work, carbon dots (CDs) were intercalated between CuO nanoparticles and coralloid flower-like graphitic carbon nitride (g-C3N4) to fabricate a ternary CuO/CDs/g-C3N4 hybrid for synergetic visible-light-driven photo-Fenton-like oxidation. The CuO/CDs/g-C3N4 hybrid showed remarkable degradation efficiency towards recalcitrant organic contamination, excellent tolerance to realistic environmental conditions, exceptional stability and wide universality, declaring great potential for practical applications. •OH and •O2 − radicals were demonstrated to be the primary contributors in the photo-Fenton-like system. Mechanism studies reveal dual charge transfer pathways in the Z-scheme CuO/g-C3N4 heterojunction assisted by interfacial electron transmission bridges of CDs, which can simultaneously boost the reduction of Cu2+ to Cu+ in the Fenton-like cycle and accelerate the Z-scheme electron flow from CuO to g-C3N4, leading to synergistic enhancement of the catalytic performance. This work would afford a feasible strategy to develop reinforced solar energy-assisted photo-Fenton-like catalysis systems for water remediation.

Document Type

Journal Article

Date of Publication

3-15-2023

Volume

634

PubMed ID

36571859

Publication Title

Journal of Colloid and Interface Science

Publisher

Elsevier

School

School of Science

RAS ID

56413

Funders

National Key R&D Program of China (No. 2019YFA0708700)

National Natural Science Foundation of China (No. 22208375, 2213000238)

Shandong Provincial Natural Science Foundation (No. ZR2019QB016, ZR2018ZC1458)

Taishan Scholar Project of Shandong Province of China (No. ts201712020)

Technological Leading Scholar of 10000 Talent Project (No. W03020508), China

Comments

Wu, X., Zhao, Q., Zhang, J., Li, S., Liu, H., Liu, K., ... & Wu, M. (2023). 0D carbon dots intercalated Z-scheme CuO/g-C3N4 heterojunction with dual charge transfer pathways for synergetic visible-light-driven photo-Fenton-like catalysis. Journal of Colloid and Interface Science, 634, 972-982.

https://doi.org/10.1016/j.jcis.2022.12.052

Copyright

subscription content

First Page

972

Last Page

982

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Link to publisher version (DOI)

10.1016/j.jcis.2022.12.052