Jump to main content
Jump to site search

Issue 15, 2017
Previous Article Next Article

Preparation of annular TiO2 nanoparticles constructed by high-energy surfaces and enhanced visible-light photocatalytic activity

Author affiliations

Abstract

Controlling overexposed facets with high energy is pivotal for various applications, particularly catalytic reactions which occur on the surfaces of nanostructures. Herein, we report a combined solvothermal and etching method to synthesize anatase TiO2 nanocrystals with energetic exposed facets, which exhibit enhanced visible light photodegradation activity towards RhB. Electron microscopic photographs revealed that the initially prepared nanocrystals had a hierarchical structure stacked by secondary nanoplates, and time dependent experiments proved that the formation process followed an oriented aggregation mechanism and a subsequent grain growth. In addition, quantum mechanical calculations revealed that the etching process could occur along three directions of TiO2 nanocrystals, and the formation of Ti3+ defects was thermodynamically favorable, which was further demonstrated by XPS spectra. The reasons for the enhanced photodegradation activity are also discussed through the production of reactive oxygen species (ROS), which revealed that the adsorption of surface hydroxyls and H2O may be the main reason for this enhancement.

Graphical abstract: Preparation of annular TiO2 nanoparticles constructed by high-energy surfaces and enhanced visible-light photocatalytic activity

Back to tab navigation

Supplementary files

Publication details

The article was received on 08 May 2017, accepted on 20 Jun 2017 and first published on 20 Jun 2017


Article type: Paper
DOI: 10.1039/C7NJ01560G
Citation: New J. Chem., 2017,41, 7562-7570
  •   Request permissions

    Preparation of annular TiO2 nanoparticles constructed by high-energy surfaces and enhanced visible-light photocatalytic activity

    F. Kong, Y. Xia, X. Jiao and D. Chen, New J. Chem., 2017, 41, 7562
    DOI: 10.1039/C7NJ01560G

Search articles by author

Spotlight

Advertisements