FeOOH-activating resorcinol–formaldehyde resin nanospheres for the photo-Fenton degradation of organic pollutants

Binyao Liu; Longgang Yan; Jinyu Wen; Xiaotian Liu; Feng Duan; Bi Jia; Xiaoyan Liu; Gaili Ke; Huichao He; Yong Zhou

doi:10.1039/D2NJ03466B

FeOOH-activating resorcinol–formaldehyde resin nanospheres for the photo-Fenton degradation of organic pollutants†

Binyao Liu,^a Longgang Yan,^b Jinyu Wen,^a Xiaotian Liu,^a Feng Duan,^a Bi Jia,^c Xiaoyan Liu,^c Gaili Ke,*^a Huichao He

*^ac and Yong Zhou

*^d

Author affiliations

* Corresponding authors

^a State Key Laboratory of Environmental Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China

^b Institute of Applied Electronic, China Academy of Engineering Physics, Mianyang 621010, China

^c Institute of Environmental Energy Materials and Intelligent Devices, School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, P. R. China
E-mail: hehuichao@cqust.edu.cn

^d Ecomaterials and Renewable Energy Research Center, School of Physics, Nanjing University, Nanjing 211102, China

Abstract

Relative to the traditional homogeneous Fenton process, the heterogeneous photo-Fenton system has superiorities in terms of the cost, pH range of application, and environmental compatibility for the degradation of organic pollutants. For the development of an effective heterogeneous photo-Fenton system, the most important part is the photocatalyst that can produce H₂O₂ and further activate it into free radicals (˙OH, ˙O₂⁻). Here, composites of FeOOH and resorcinol–formaldehyde resin (RFS) were prepared by coupling an FeOOH thin layer on the surface of RFS nanospheres, and the resultant composites were investigated as photocatalysts for the construction of a heterogeneous photo-Fenton system. In the FeOOH/RFS composite-based system, H₂O₂ can be produced via the reduction of dissolved oxygen through RFS nanosphere photocatalysis under visible-light irradiation. Meanwhile, the Fe³⁺ of FeOOH can be partially reduced to Fe²⁺ by the photogenerated electrons of the FeOOH/RFS composites. Through the reaction of H₂O₂ with Fe²⁺, ˙OH is continuously produced to initiate the effective degradation of rhodamine B (RhB) and dimethyl phthalate (DMP). Our work presents an efficient heterogeneous photo-Fenton system to achieve the degradation of organic pollutants, which could inspire the development of a similar photo-Fenton system for environmental protection.

New Journal of Chemistry

FeOOH-activating resorcinol–formaldehyde resin nanospheres for the photo-Fenton degradation of organic pollutants†

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