Synthesis of coral-like α-Fe2O3 nanoparticles for dye degradation at neutral pH

被引：43

作者：

Gupta, Nishesh Kumar ^{[1
,2
]}

Ghaffari, Yasaman ^{[1
,2
]}

Bae, Jiyeol ^{[2
]}

Kim, Kwang Soo ^{[1
,2
]}

机构：

[1] Univ Sci & Technol, Daejeon, South Korea

[2] Korea Inst Civil Engn & Bldg Technol KICT, Environm & Plant Engn Res Inst, Goyang, South Korea

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2020年 / 301卷

关键词：

alpha-Fe2O3; Coral-like; Dye degradation; Fast kinetics; Photo-Fenton; AZO-DYE; METHYLENE-BLUE; PHOTOCATALYTIC ACTIVITY; OPTICAL-PROPERTIES; FENTON; OXIDE; ORANGE; WASTE; IRON; PHOTODEGRADATION;

D O I：

10.1016/j.molliq.2020.112473

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：

This study reported a surfactant-mediated synthesis of coral-like alpha-Fe2O3 nanoparticles (FONP) via a simple co-precipitation-oxidation route. The synthesized FONP photocatalyst had a hexagonal morphology, as observed in the transmission electron micrographs. A surface area of 15 m(2) g(-1) was calculated from the N-2 adsorption-desorption isotherm. The photocatalyst showed strong absorbance in the entire UV-Visible range with a low bandgap energy of 1.91 eV as estimated using the Tauc plot. The photocatalytic activity of FONP was evaluated by degrading several organic dyes at neutral pH. In the optimized experimental conditions, the FONP photocatalyst showed fast degradation of Methylene blue (95%), Methyl orange (94%), Bromo green (94%), and Methyl red (76%) within 5 min in 32 W UV/H2O2 system. The reusability study showed a 10% loss in the degradation efficiency after five cycles. A possible photo-Fenton degradation mechanism was deduced based on scavenger studies. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：9

共 36 条

[1] Facile synthesis of Fe2O3 nanoparticles from Egyptian insecticide cans for efficient photocatalytic degradation of methylene blue and crystal violet dyes [J].