Open AccessCarbon quantum dots modified Bi 2 WO 6 nanoflowers for enhancing photocatalytic activity: an experimental and DFT study
Author(s) -
Wu Kun,
Song Shaojia,
Wu Huadong,
Guo Jia,
Zhang Linfeng
Publication year - 2020
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2019.0702
Subject(s) - photocurrent , photodegradation , materials science , photoluminescence , x ray photoelectron spectroscopy , photocatalysis , quantum dot , nanocomposite , hydrothermal circulation , heterojunction , carbon fibers , absorption edge , carbon quantum dots , chemical engineering , charge carrier , absorption (acoustics) , nanotechnology , optoelectronics , chemistry , band gap , catalysis , composite material , organic chemistry , composite number , engineering
Carbon quantum dots (CQDs) decorated Bi 2 WO6 nanocomposites were successfully synthesised by a facile hydrothermal method. The prepared samples were characterised by the XRD, FESEM, TEM, XPS, UV–vis DRS, photocurrent and photoluminescence (PL) techniques. The DRS, photocurrent, PL spectra measurements reveal that the introduction of CQDs could broaden the absorption edge and accelerate the separation and transportation efficiency of carriers. Moreover, a reasonable charge transfer approach was given out based on the calculated work function and the differential charge difference. The CQDs/Bi 2 WO 6 ‐2 sample provides the optimal activity for photodegradation of CIP under simulated sunlight irradiation. It is hopeful that this work not only gives a reference for the design of CQDs/Bi 2 WO 6 composites, but also provides some mechanistic insights into enhanced photoactivity.