Fabrication of Au@α-Fe2O3 particles with an enhanced visible-light photocatalysis activity

被引：10
作者：
Lin, Qing [1 ]
Xia, Shuyi [1 ]
Li, Shuiping [2 ]
Fu, Hailuo [1 ]
Liang, Dong [1 ]
Wang, Zhao [1 ]
Zhang, Xiaojuan [1 ]
机构：
[1] Jinling Inst Technol, Sch Mat Technol, Nanjing 211169, Peoples R China
[2] Yangzhou Univ, Coll Civil Sci & Engn, Yangzhou 225127, Peoples R China
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2023年 / 307卷
基金：
中国国家自然科学基金;
关键词：
Au nanoparticle; poly(vinyl pyrrolidone); Photocatalytic property; ALPHA-FE2O3; DEGRADATION; HETEROSTRUCTURES; NANOPARTICLES; MORPHOLOGY; OXIDATION;
D O I：
10.1016/j.matchemphys.2023.128173
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Au nanoparticles deposited & alpha;-Fe2O3 (Au@& alpha;-Fe2O3) particles with a well-defined structure were fabricated by the hydrothermal and the magnetron sputtering methods. After deposited 4.6% Au, Au@& alpha;-Fe2O3 shows a new absorption peak at 550 nm in the UV-Vis spectrum, and its bandgap narrows from 2.20 to 1.93 eV. Moreover, the fluorescence intensity and electrochemical impedance of 4.6% Au@& alpha;-Fe2O3 decrease significantly, while the photocurrent increases from 0.20 to 0.56 & mu;A cm-2. Au nanoparticles extend the visible-light absorption performance and inhibit the recombination of electron-hole pairs of Au@& alpha;-Fe2O3 particles. The photocatalytic property of Au@& alpha;-Fe2O3 particles becomes more stable, and the photocatalytic efficiency of Au@& alpha;-Fe2O3 particles is about 1 time higher than that of & alpha;-Fe2O3 particles.
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页数：8
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