Highly-efficient phenol degradation by a novel perylene diimide supermolecule-based photo-self-fenton system and mechanism investigation

被引：0

作者：

Guo Y. ^{[1
]}

Cui Y. ^{[1
]}

Li B. ^{[1
]}

Li Y. ^{[1
]}

Liu D. ^{[1
]}

机构：

[1] School of Chemical and Environmental Engineering, China University of Mining and Technology-Beijing, Beijing

来源：

Meitan Xuebao/Journal of the China Coal Society | 2023年 / 48卷 / 11期

关键词：

active species; perylene diimide; phenol; photo-self-Fenton; supermolecule;

D O I：

10.13225/j.cnki.jccs.ZY22.1697

中图分类号：

学科分类号：

摘要：

The photo-self-Fenton collaborative system, which combines Fenton reaction with photocatalytic system, exhibits excellent oxidation ability over pollutants without external addition of hydrogen peroxide. Herein, the PDI-C/Fe3+ photo-self-Fenton system, combining carboxylic acid side chain modified perylene diimide supramolecule (PDI-C) and Fe3+, is used to obtain an extremely efficient and durable degradation efficiency of Phenol (a model pollutant in phenolic wastewater). The research systematically investigates the catalytic reaction mechanism by examining the changes in the form and content of iron species, the production mechanism and content changes of hydrogen peroxide and the content changes of various active species. The interaction between Fe3+ and the carboxylic acid side chain of PDI-C promotes photo-generated electron capture by Fe3+ and the resultant conversion to Fe2+, accordingly facilitating the separation of photogenerated carriers. On the other hand, the hydrogen peroxide generated in-situ during the photocatalytic process pairs with the effective circulation of iron ions to form a photo-self-Fenton system, which synergically promotes the efficient and durable phenol degradation. It is also found that as the reaction prolonged, α-FeOOH formed on the surface of PDI-C not only results in iron loss, but also leads to the obscuration of light-absorbing sites, thus becoming a non-negligible factor for the decrease of catalytic activity. Notably, acid addition can not only inhibit the generation of α-FeOOH, but also aid the leaching of formed α-FeOOH, enabling an efficient iron ion circulation and the photo-self-Fenton system's efficient operation. The work also identifies two pathways of hydrogen peroxide production and reveals a competitive relationship between ·OH and ·O2– in the presence of Fe3+. These findings highlight the high efficiency and durability of the PDI-C/Fe3+ photo-self-Fenton system in degrading phenol pollutants under visible light irradiation, while showcasing its potential for practical applications due to its cost-effectiveness and simplicity. © 2023 China Coal Society. All rights reserved.

引用

页码：4233 / 4246

页数：13

共 54 条

[1] SHI J, XU C, HAN Y, Et al., Case study on wastewater treatment technology of coal chemical industry in China[J], Critical Reviews in Environmental Science and Technology, 51, 10, (2021)
[2] BSOUL AL A, HAILAT M, ABDELHAY A, Et al., Efficient removal of phenol compounds from water environment using Ziziphus leaves adsorbent[J], Science of The Total Environment, 761, (2021)
[3] MANDAL A, MUKHOPADHYAY P, DAS S K., Adsorptive removal of phenol from wastewater using guava tree bark[J], Environmental Science and Pollution Research, 27, 19, pp. 23937-23949, (2020)
[4] SIMOES A J A, MACEDO-JUNIOR R O, SANTOS B L P, Et al., A bibliometric study on the application of advanced oxidation processes for produced water treatment[J], Water, Air & Soil Pollution, 232, 7, pp. 1-14, (2021)
[5] MIRZAEI A, CHEN Z, HAGHIGHAT F, Et al., Removal of pharmaceuticals from water by homo/heterogonous Fenton-type processes–A review[J], Chemosphere, 174, pp. 665-688, (2017)
[6] XU J, ZHENG X, FENG Z, Et al., Organic wastewater treatment by a single-atom catalyst and electrolytically produced H2O2[J], Nature Sustainability, 4, 3, (2021)
[7] XING M, XU W, DONG C, Et al., Metal sulfides as excellent co-catalysts for H2O2 decomposition in ad-vanced oxidation processes[J], Chem, 4, 6, (2018)
[8] CHEN Y, ZHANG G, LIU H, Et al., Confining free radicals in close vicinity to contaminants enables ultrafast fenton-like processes in the interspacing of MoS2 membranes[J], Angewandte Chemie International Edition, 58, 24, pp. 8134-8138, (2019)
[9] SAID K A M, ISMAIL A F, KARIM Z A, Et al., A review of technologies for the phenolic compounds recovery and phenol removal from wastewater[J], Process Safety and Environmental Protection, 151, pp. 257-289, (2021)
[10] LI Y, ZHANG X L, LIU D., Recent developments of perylene diimide (PDI) supramolecular photocatalysts： A review[J], Journal of Photochemistry and Photobiology C：Photochemistry Reviews, 48, (2021)

← 1 2 3 4 5 6 →