Issue 10, 2018

A photocatalytic degradation strategy of PPCPs by a heptazine-based CN organic polymer (OCN) under visible light

Abstract

Polymeric photocatalysts have desirable application prospects due to their low cost and controllable structures. Here, we report on the synthesis of a highly effective and stable oxygen- and nitrogen-linked heptazine-based carbon nitride organic polymer (OCN) photocatalyst that is metal-free and porous, with low crystallinity and nitrogen vacancies, which is prepared through a single-step approach. For the photocatalytic degradation of several typical PPCPs, the OCN exhibited excellent photocatalytic performance compared to C3N4. The enhanced mechanisms were investigated novelty, and the conduction band, crystallinity and recombination rate of photogenerated carriers were reduced due to the introduction of oxygen atoms and nitrogen vacancies, whereas the fabrication of porous structures provided additional adsorption sites. The mechanism of hydroxyl radical generation in the OCN system was first proposed under this system. The O linkages can form hydrogen bonds with H2O2 to promote the catalytic generation of hydroxyl radicals (˙OH). The presence of ˙OH, O2˙ and 1O2 (detected by ESR) indicated that the OCN polymer could be employed to degrade organic pollutants.

Graphical abstract: A photocatalytic degradation strategy of PPCPs by a heptazine-based CN organic polymer (OCN) under visible light

Supplementary files

Article information

Article type
Paper
Submitted
07 Jun 2018
Accepted
03 Aug 2018
First published
03 Aug 2018

Environ. Sci.: Nano, 2018,5, 2325-2336

A photocatalytic degradation strategy of PPCPs by a heptazine-based CN organic polymer (OCN) under visible light

Q. Zhang, P. Chen, C. Tan, T. Chen, M. Zhuo, Z. Xie, F. Wang, H. Liu, Z. Cai, G. Liu and W. Lv, Environ. Sci.: Nano, 2018, 5, 2325 DOI: 10.1039/C8EN00608C

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