Carbon quantum dots modified Bi 2 WO 6 nanoflowers for enhancing photocatalytic activity: an experimental and DFT study

Micro & nano letters

article

Kun Wu¹  Shaojia Song¹  Huadong Wu¹  Jia Guo¹  Linfeng Zhang¹ 

[1] Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology;Key Laboratory of Novel Reactor and Green Chemical Technology of Hubei Province, Wuhan Institute of Technology;School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology;College of Post and Telecommunications, Wuhan Institute of Technology;School of Chemical Engineering and Technology, Tianjin University

关键词: density functional theory;    nanocomposites;    photoconductivity;    ultraviolet spectra;    visible spectra;    X-ray photoelectron spectra;    transmission electron microscopy;    crystal growth from solution;    quantum dots;    work function;    X-ray diffraction;    nanofabrication;    carbon;    photodissociation;    field emission scanning electron microscopy;    photocatalysis;    bismuth compounds;    photocatalytic activity;    DFT;    facile hydrothermal method;    PL spectra measurements;    separation;    optimal activity;    carbon quantum dot modified nanoflowers;    carbon quantum dot decorated nanocomposites;    charge transfer approach;    XRD;    FESEM;    TEM;    XPS;    UV-visible DRS;    photocurrent;    photoluminescence;    carrier transportation efficiency;    work function;    differential charge difference;    photodegradation;    simulated sunlight irradiation;    C-Bi2WO6;   

DOI  :  10.1049/mnl.2019.0702

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

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.

【 授权许可】

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