Jump to main content
Jump to site search
SCHEDULED MAINTENANCE Close the message box

Maintenance work is planned for Monday 16 August 2021 from 07:00 to 23:59 (BST).

Website performance may be temporarily affected and you may not be able to access some PDFs or images. If this does happen, refreshing your web browser should resolve the issue. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 42, 2018

Excellent degradation performance of 3D hierarchical nanoporous structures of copper towards organic pollutants

Author affiliations

Abstract

Advanced oxidation processes provide a promising way to the degradation of organic pollutants in wastewater, wherein developing highly efficient catalysts is of paramount importance. Herein, three-dimensional (3D) hierarchical nanoporous structures of Cu catalysts with desirable geometries were synthesized by laser 3D printing combined with chemical dealloying. The resulting 3D nanoporous Cu (3D NP-Cu) exhibited a 660-fold larger specific surface area than conventional 2D ribbons or powder catalysts. The 3D NP-Cu catalysts exhibited high degradation efficiency towards azo dyes with a kinetic reaction constant of 0.147 min−1, which is 14 times higher than that of the commercial catalyst of Cu2+ and 4 times higher than that of Cu0 powder. Impressively, the 3D NP-Cu exhibited fairly good reusability and excellent versatility, as indicated by the fast degradation of the mixture of complex dyes and reduction of the chemical oxygen demand (COD). The extraordinary catalytic activities of the 3D NP-Cu catalysts originated from their unique 3D hierarchical mill/nano-porous structures with large surface areas and numerous active atomic steps on Cu ligaments, which generate abundant active species and accelerate the transport of reactants. In addition, the presence of a small amount of Cu+ active species in the as-prepared 3D NP-Cu catalyst also played a critical role in promoting the degradation process, leading to the decomposition of azo dyes even in the absence of H2O2. Moreover, two possible pathways of degradation towards azo dyes were proposed based on liquid chromatograph-mass spectrometry analysis, i.e. reduction of azo bonds and demethylation of MO. The current work may inspire the development of new types of 3D nanostructured metal catalysts for remediation of wastewater.

Graphical abstract: Excellent degradation performance of 3D hierarchical nanoporous structures of copper towards organic pollutants

Supplementary files

Article information


Submitted
16 Aug 2018
Accepted
01 Oct 2018
First published
01 Oct 2018

J. Mater. Chem. A, 2018,6, 20992-21002
Article type
Paper

Excellent degradation performance of 3D hierarchical nanoporous structures of copper towards organic pollutants

C. Yang, C. Zhang and L. Liu, J. Mater. Chem. A, 2018, 6, 20992 DOI: 10.1039/C8TA07973K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.


Social activity

Search articles by author

Spotlight

Advertisements