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Issue 24, 2018
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Triple layered core–shell ZVI@carbon@polyaniline composite enhanced electron utilization in Cr(VI) reduction

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Abstract

A triple layered core–shell structured zero valence iron@carbon@polyaniline (ZVI@C@PANI) nanocomposite was synthesized and was used to reduce the Cr(VI) in wastewater. The synthesized ZVI@C@PANI was demonstrated to have a great Cr(VI) removal performance with a fast rate and high capacity. ZVI@C@PANI can reduce almost all the hexavalent chromium (Cr(VI)) (1.0 mg L−1) Cr(VI) in 5 min, and has a maximum capacity of 508 mg g−1. A maximum Cr(VI) removal capacity of 508 mg g−1 was achieved. The shell layers of C@PANI were demonstrated to be important to improve the electron utilization of the inner ZVI. The PANI shell captured and stored the H+ from the solution, providing an acidic condition on its surface. The carbon layer can adjust the H+ and H2 transfer in the ZVI@C@PANI. These were disclosed as the mechanisms for the improved electron utilization by this core–shell structured ZVI@C@PANI.

Graphical abstract: Triple layered core–shell ZVI@carbon@polyaniline composite enhanced electron utilization in Cr(vi) reduction

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Publication details

The article was received on 03 Apr 2018, accepted on 10 May 2018 and first published on 11 May 2018


Article type: Communication
DOI: 10.1039/C8TA03066A
Citation: J. Mater. Chem. A, 2018,6, 11119-11128
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    Triple layered core–shell ZVI@carbon@polyaniline composite enhanced electron utilization in Cr(VI) reduction

    K. Gong, Q. Hu, Y. Xiao, X. Cheng, H. Liu, N. Wang, B. Qiu and Z. Guo, J. Mater. Chem. A, 2018, 6, 11119
    DOI: 10.1039/C8TA03066A

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