Issue 21, 2023

Synthesis of Pd–AuAg trimetal nanohybrids with controlled heterostructures and their application in the continuous flow catalytic reduction of Cr(vi)

Abstract

Given the well-known risks of hexavalent chromium (Cr(VI)) to both human health and the environment, it is of utmost importance to develop robust and effective techniques for the removal of this hazardous compound during wastewater treatment. To this end, we present a facile method to synthesize an efficient heterogeneous catalyst that can be used in continuous flow catalysis for the reduction of Cr(VI) to trivalent chromium (Cr(III)) in water. A seed-mediated growth strategy of island growth mode was adopted to synthesize Pd–AuAg trimetal nanohybrids with different heterogeneous structures: octapod-like, bumpy, and Janus structures. When evaluated in batch-type catalysis, the as-synthesized Pd–AuAg trimetal nanohybrids showed excellent catalytic activity toward the reduction of Cr(VI) in water. Continuous flow catalysis was carried out by synthesizing a nanocomposite hydrogel with the Pd–AuAg trimetal nanohybrids embedded and using it as a heterogeneous catalyst. The experimental results showed that the catalytic activity of the nanocomposite hydrogel in the flow reaction could be effectively controlled by adjusting the composition of the hydrogel constituents and the processing conditions such as the flow rate. Outstanding catalytic activity, as indicated by a conversion rate of 98%, was achieved under optimized conditions. In addition, the nanocomposite-based heterogeneous catalyst exhibited excellent stability and could be reused without substantial loss of activity even when stored for an extended period in the dried state.

Graphical abstract: Synthesis of Pd–AuAg trimetal nanohybrids with controlled heterostructures and their application in the continuous flow catalytic reduction of Cr(vi)

Supplementary files

Article information

Article type
Paper
Submitted
03 Mar 2023
Accepted
28 Apr 2023
First published
28 Apr 2023

J. Mater. Chem. A, 2023,11, 11388-11400

Synthesis of Pd–AuAg trimetal nanohybrids with controlled heterostructures and their application in the continuous flow catalytic reduction of Cr(VI)

A. Pradysti, H. J. Kim, W. J. Hyun and M. H. Kim, J. Mater. Chem. A, 2023, 11, 11388 DOI: 10.1039/D3TA01307C

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

Spotlight

Advertisements