N + Ni Codoped Anatase TiO₂ Nanocrystals with Exposed {001} Facets Through Two‐Step Hydrothermal Route

Abstract

This study introduces a facile and novel route to synthesize the N + Ni codoped anatase TiO2 nanocrystals with exposed {001} facets through two‐step hydrothermal reaction. The microstructures, chemical compositions, and photocatalytic properties of the codoped TiO2 were characterized using X‐ray diffractometer, high‐resolution transmission electron microscopy, X‐ray photoelectron spectroscopy, UV‐vis spectrometry, and photoluminescence emission spectra. The experimental results revealed that (i) the elements N and Ni have been successfully codoped into the anatase TiO2 with exposed {001} facets; (ii) the size of the TiO2 reached to a narrow range of 5–15 nm; (iii) the codoped TiO2 exhibited an additional visible light absorption band from 400 to 500 nm, which greatly improved the photocatalytic activity. The theoretical calculations for band structure and total energy also provided a good explanation for the experimental results.

A facile synthesis of CdSe quantum dots-decorated anatase TiO2 with exposed {0 0 1} facets and its superior photocatalytic activity

“…Metal or non-metal ions doping of T001 can tune its electronic structure and thus obtain visible-light-responsive photocatalysts [11][12][13][14]. However, the dopants can easily become the recombination centers for charge carriers and lower stability of the doped materials.…”

Effectiveness of photodecomposition of rhodamine B and malachite green upon coupled tricomponent TiO2(Anatase-Rutile)/ZnO nanocomposite

“…Conversely, the generated holes could move into the VB of ZnO from anatase. Such a coupled effect among ZnO-anatase/rutile multiple-component interface could retard the occurrence of recombination between electrons and holes [71][72][73][74][75][76]. This effi cient charge separation prolongs the lifetime of the charge carriers and enhances the photocatalytic effi ciency of ZnOTiO 2 nanocomposite in comparison with to pure TiO 2 photocatalyst.…”

Photonic, and photocatalytic behavior of TiO2 mediated by Fe, CO, Ni, N doping and co-doping

“…Zhang et al [38] reported that Ni-N co-doping facilitates the separation of photo-generated carriers and enhances the photo-oxidation or photo-reduction activity.…”