Magnetic Photocatalyst BiVO₄/Mn-Zn ferrite/Reduced Graphene Oxide: Synthesis Strategy and Its Highly Photocatalytic Activity

Nanomaterials
Taiping XieLongjun Xu

Abstract

Magnetic photocatalyst BiVO₄/Mn-Zn ferrite (Mn1-xZn x Fe₂O₄)/reduced graphene oxide (RGO) was synthesized by a simple calcination and reduction method. The magnetic photocatalyst held high visible light-absorption ability with low band gap energy and wide absorption wavelength range. Electrochemical impedance spectroscopies illustrated good electrical conductivity which indicated low charge-transfer resistance due to incorporation of Mn1-xZn x Fe₂O₄ and RGO. The test of photocatalytic activity showed that the degradation ratio of rhodamine B (RhB) reached 96.0% under visible light irradiation after only 1.5 h reaction. The photocatalytic mechanism for the prepared photocatalyst was explained in detail. Here, the incorporation of RGO enhanced the specific surface area compared with BiVO4/Mn1-xZn x Fe₂O₄.The larger specific surface area provided more active surface sites, more free space to improve the mobility of photo-induced electrons, and further facilitated the effective migration of charge carriers, leading to the remarkable improvement of photocatalytic performance. Meanwhile, RGO was the effective acceptor as well as transporter of photo-generated electron hole pairs. •O₂- was the most active species in the photocatalytic...Continue Reading

References

Jan 1, 2010·ACS Nano·Hao ZhangJinghong Li
Sep 12, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Wanqing ZhangBaoquan Wang
Dec 4, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Taiping XieMei Wang
May 27, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Lishu ZhangLijun Zhao
Nov 20, 2015·Chemical Society Reviews·Janina WillkommErwin Reisner

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