fulltext.study @t Gmail

Solvothermal synthesis and photocatalytic performance of Mn4+-doped anatase nanoplates with exposed {0 0 1} facets

Paper ID Volume ID Publish Year Pages File Format Full-Text
45618 46418 2015 7 PDF Available
Title
Solvothermal synthesis and photocatalytic performance of Mn4+-doped anatase nanoplates with exposed {0 0 1} facets
Abstract

•Mn4+ doped TiO2 nanoplates with large {0 0 1} facets prepared by solvothermal method.•Mn4+ doping decreases the crystal growth of the nanoplates.•Mn4+ doping shifts the absorption edge of nanoplates towards visible light region.•Low Mn4+ doping enhances the photocatalytic activity under visible light.

The photocatalytic activity of TiO2 and manganese doped TiO2 nanoplates with various manganese atomic percentages, in the range of 2–7%, was studied. The undoped and doped nanoplates with exposed {0 0 1} facets were produced by a solvothermal method. The crystal structure as well as the shape of the TiO2 and Mn4+/TiO2 anatase nanoparticles was determined with X-ray powder diffraction (XRD) and transmission electron microscopy (TEM). Both techniques revealed that the nanocrystals are in the form of plates. Moreover, the anisotropic peak broadening of the X-ray diffraction patterns was studied using the Rietveld refining method. Chemical analysis of the photocatalyst that was carried out with X-ray photoelectron spectroscopy (XPS) showed the presence of manganese ions in the TiO2 anatase matrix. The Density Functional Theory (DFT) calculations exhibited a decrease in the energy gap and an increase in the density of the electronic stated inside the gap for the doped TiO2. These observations were in agreement with the results of the UV–visible diffuse reflectance spectroscopy (DRS) that demonstrated an adsorption shift towards the visible region for the same samples.The photocatalytic activity of the synthesized catalysts was investigated by the photocatalytic oxidation of the gaseous nitric oxide (NO) and decomposition of the gaseous acetaldehyde (CH3CHO) under visible light irradiation. The optimal concentration of dopant that improves the photocatalytic activity of the nanoplates was determined.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Mn4+/TiO2; Anatase nanoplates; {0 0 1} facets; Photocatalysis; NO oxidation; Acetaldehyde decomposition
First Page Preview
Solvothermal synthesis and photocatalytic performance of Mn4+-doped anatase nanoplates with exposed {0 0 1} facets
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 162, January 2015, Pages 27–33
Authors
, , , , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us