Challenges in determining the location of dopants, to study the influence of metal doping on the photocatalytic activities of ZnO nanopowders

Takuya Tsuzuki*, Rongliang He, Aaron Dodd, Martin Saunders

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    29 Citations (Scopus)

    Abstract

    Impurity doping is one of the common approaches to enhance the photoactivity of semiconductor nanomaterials by increasing photon-capture efficiency in the visible light range. However, many studies on the doping effects have produced inconclusive and conflicting results. There are some misleading assumptions and errors that are frequently made in the data interpretation, which can lead to inconsistent results about the doping effects on photocatalysis. One of them is the determination of the location of dopants. Even using advanced analytical techniques, it is still challenging to distinguish between bulk modification and surface modification. The paper provides a case study of transition-metal-doped ZnO nanoparticles, whereby demonstrating common pitfalls in the interpretation of the results of widely-used analytical methods in detail, and discussing the importance of using a combination of many characterization techniques to correctly determine the location of added impurities, for elucidating the influence of metal doping on the photocatalytic activities of semiconductor nanoparticles.

    Original languageEnglish
    Article number481
    JournalNanomaterials
    Volume9
    Issue number3
    DOIs
    Publication statusPublished - Mar 2019

    Fingerprint

    Dive into the research topics of 'Challenges in determining the location of dopants, to study the influence of metal doping on the photocatalytic activities of ZnO nanopowders'. Together they form a unique fingerprint.

    Cite this