Facile construction of ternary CuFe2O4-TiO2 nanocomposite supported reduced graphene oxide (rGO) photocatalysts for the efficient hydrogen production

被引：91
|
作者：
Hafeez, Yusuf Hafeez [1 ]
Lakhera, Sandeep Kumar [2 ]
Karthik, Peramaiah [1 ]
Anpo, Masakazu [3 ]
Neppolian, Bernaurdshaw [1 ]
机构：
[1] SRM Univ, SRM Res Inst, Chennai 603203, Tamil Nadu, India
[2] SRM Univ, Dept Phys & Nanotechnol, Chennai 603203, Tamil Nadu, India
[3] Osaka Prefecture Univ, Grad Sch Engn, Dept Appl Chem, 1-1 Gakuen Cho, Sakai, Osaka 5998531, Japan
来源：
APPLIED SURFACE SCIENCE | 2018年 / 449卷
关键词：
Titanium dioxide; Copper ferrites; Reduced graphene oxide; Photocatalyst; Hydrogen evolution; Nanocomposite; COPPER FERRITE; ORGANIC-DYES; TIO2; NANOPARTICLES; DEGRADATION; PERFORMANCE; REDUCTION; COMPOSITE; EVOLUTION; BROOKITE;
D O I：
10.1016/j.apsusc.2018.01.282
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Reduced graphene oxide supported CuFe2O4-TiO2 p-n heterojunction nanocomposite was prepared via ultrasound assisted simple wet impregnation method. The nanocomposites were characterized, by XRD, FTIR, Raman Spectra, FE-SEM, HR-TEM, UV-vis, DRS Spectra, and PL Spectra. The optical band gap of rGO/CuFe2O4-TiO2 nanocomposite was found to be red shifted to 1.51 eV from 3.20 eV for pristine TiO2 nanoparticles (NPs). The photocatalytic activity of the as-prepared rGO/CuFe2O4-TiO2 nanocomposite was determined via photocatalytic water-splitting in the presence of glycerol as hole scavenger under UV-vis light irradiation. A peak hydrogen production rate of 35981 mu molg(-1) h(-1) was obtained, which is similar to 8 and 3 times higher than that of bare TiO2 (4640 mu molg(-1) h(-1)) and CuFe2O4-TiO2 photocatalysts (14719 mu molg(-1) h(-1)), respectively. This remarkable improvement in the photocatalytic activity can be attributed to the enhanced visible light absorption and efficient charge carrier separation at the interface of rGO/CuFe2O4-TiO2 nanocomposites. A significant quenching of photoluminescence intensity of the rGO/CuFe2O4-TiO2 nanocomposite further confirmed the effective separation and transportation of photogenerated charge carriers in the presence of rGO sheet. A double charge separation and transportation mechanism is proposed for the enhanced photocatalytic activity. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：772 / 779
页数：8
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