Polymer dots grafted TiO 2 nanohybrids as high performance visible light photocatalysts

As a new member of carbon dots (CDs), Polymer dots (PDs) prepared by hydrothermal treatment of polymers, usually consist of the carbon core and the connected partially degraded polymer chains. This type of CDs might possess aqueous solubility, non-toxicity, excellent stability against photo-bleachin...

Full description

Saved in:
Bibliographic Details
Published in:Chemosphere (Oxford) 2018-01, Vol.197, p.526
Main Authors: Li, Gen, Wang, Feng, Liu, Peng, Chen, Zheming, Lei, Ping, Xu, Zhongshan, Li, Zengxi, Ding, Yanfen, Zhang, Shimin, Yang, Mingshu
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:As a new member of carbon dots (CDs), Polymer dots (PDs) prepared by hydrothermal treatment of polymers, usually consist of the carbon core and the connected partially degraded polymer chains. This type of CDs might possess aqueous solubility, non-toxicity, excellent stability against photo-bleaching and high visible light activity. In this research, PDs were prepared by a moderate hydrothermal treatment of polyvinyl alcohol, and PDs grafted TiO (PDs-TiO ) nanohybrids with TiOC bonds were prepared by a facile in-situ hydrothermal treatment of PDs and Ti (SO ) . Under visible light irradiation, the PDs-TiO demonstrate excellent photocatalytic activity for methyl orange degradation, and the photocatalytic rate constant of PDs-TiO is 3.6 and 9.5 times higher than that of pure TiO and commercial P25, respectively. In addition, the PDs-TiO exhibit good recycle stability under UV-Vis light irradiation. The interfacial TiOC bonds and the π-conjugated structures in PDs-TiO can act as the pathways to quickly transfer the excited electrons between PDs and TiO , therefore contribute to the excellent photocatalytic activity.
ISSN:1879-1298