Metal-free carbon materials for persulfate-based advanced oxidation process: Microstructure, property and tailoring

Yu, Jiangfang; Feng, Haopeng; Tang, Lin; Pang, Ya; Zeng, Guangming; Lu, Yue; Dong, Haoran; Wang, Jiajia; Liu, Yani; Feng, Chengyang; Wang, Jingjing; Peng, Bo; Ye, Shujing

doi:10.1016/j.pmatsci.2020.100654

Cited by 263 publications

(65 citation statements)

References 258 publications

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“…They have received much attention because of their attractive advantages over metal-based catalysts, such as less cost, no secondary pollution, and their chemical, thermal and mechanical stabilities. MFCMs including reduced graphene oxide (GO), carbon nanotubes (CNTs), nano-diamonds (NDs), carbon spheres (CS) and biochar in different sizes and specifications are investigated as potential PMS/PDS catalysts [ 16 ]. Unlike metal-catalyzed processes, organic pollutants can be removed via not only catalytic degradation but also adsorption by MFCMs.…”

Section: Evolution Of 1 O 2 mentioning

confidence: 99%

“…To date, both radical and non-radical oxidations have been reported for MFCMs-mediated PMS/PDS AOPs ( Table 2 ) [ 16 , 21 ]. The non-radical pathway is a potential route to resolve the influence of background organic and inorganic matters on the degradation of targeted pollutants.…”

Section: Evolution Of 1 O 2 mentioning

confidence: 99%

“…Current studies suggest that catalyst is influential to regulate the oxidizing species formed during PDS/PMS-based AOPs. For example, 1 O 2 has been frequently found as the primary reactive species by using carbonaceous catalysts in PDS and PMS activation [ 16 ], but SO 4 •− and • OH are usually found to be the dominant species when PDS/PMS are activated by homogeneous heat, UV, and transition metals [ 3 , 17 ]. The difference between PDS and PMS leads to different activation pathways.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evolution of Singlet Oxygen by Activating Peroxydisulfate and Peroxymonosulfate: A Review

Xiao

Faheem

et al. 2021

IJERPH

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Advanced oxidation processes (AOPs) based on peroxydisulfate (PDS) or peroxymonosulfate (PMS) activation have attracted much research attention in the last decade for the degradation of recalcitrant organic contaminants. Sulfate (SO4•−) and hydroxyl (•OH) radicals are most frequently generated from catalytic PDS/PMS decomposition by thermal, base, irradiation, transition metals and carbon materials. In addition, increasingly more recent studies have reported the involvement of singlet oxygen (1O2) during PDS/PMS-based AOPs. Typically, 1O2 can be produced either along with SO4•− and •OH or discovered as the dominant reactive oxygen species (ROSs) for pollutants degradation. This paper reviews recent advances in 1O2 generation during PDS/PMS activation. First, it introduces the basic chemistry of 1O2, its oxidation properties and detection methodologies. Furthermore, it elaborates different activation strategies/techniques, including homogeneous and heterogeneous systems, and discusses the possible reaction mechanisms to give an overview of the principle of 1O2 production by activating PDS/PMS. Moreover, although 1O2 has shown promising features such as high degradation selectivity and anti-interference capability, its production pathways and mechanisms remain controversial in the present literatures. Therefore, this study identifies the research gaps and proposes future perspectives in the aspects of novel catalysts and related mechanisms.

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Section: Evolution Of 1 O 2 mentioning

confidence: 99%

Section: Evolution Of 1 O 2 mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evolution of Singlet Oxygen by Activating Peroxydisulfate and Peroxymonosulfate: A Review

Xiao

Faheem

et al. 2021

IJERPH

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“…Hence the activation of PMS/PDS is required, which mainly occurs via external energy exposure, including heat (Yang et al, 2010), ultrasound (Yin et al, 2018) and ultraviolet (UV) (Fang and Shang, 2012), gamma irradiations (Chan and Chu, 2009), transition metal (Fe, Mn, Cu, Co, etc. ) based homogenous and heterogeneous catalytic oxidation (Rojas et al, 2020) and photocatalytic activation (Yu et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Advanced activation of persulfate by polymeric g-C3N4 based photocatalysts for environmental remediation: A review

Hasija

Nguyen

Kumar

et al. 2021

Journal of Hazardous Materials

304

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Photocatalytic materials for photocatalysis is recently proposed as a promising strategy to address environmental remediation. Metal-free graphitic carbon nitride (g-C 3 N 4 ), is an emerging photocatalyst in sulfate radical based advanced oxidation processes. The solar-driven electronic excitations in g-C 3 N 4 are capable of peroxo (O-O) bond dissociation in peroxymonosulfate/peroxydisulfate (PMS/PDS) and oxidants to generate reactive free radicals, namely SO 4•− and OH • in addition to O 2 •− radical. The synergistic mechanism of g-C 3 N 4 mediated PMS/ PDS photocatalytic activation, could ensure the generation of OH • radicals to overcome the low reductive potential of g-C 3 N 4 and fastens the degradation reaction rate. This article reviews recent work on heterojunction formation (type-II heterojunction and direct Z-scheme) to achieve the bandgap for extended visible light absorption and improved charge carrier separation for efficient photocatalytic efficiency. Focus is placed on the fundamental mechanistic routes followed for PMS/PDS photocatalytic activation over g-C 3 N 4 -based photocatalysts. A particular emphasis is given to the factors influencing the PMS/PDS photocatalytic activation mechanism and the contribution of SO 4 •− and OH • radicals that are not thoroughly investigated and require further studies. Concluding perspectives on the challenges and opportunities to design highly efficient persulfateactivated g-C 3 N 4 based photocatalysts toward environmental remediation are also intensively highlighted.

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Tempospatially Confined Catalytic Membranes for Advanced Water Remediation

Lu,

Liu

2024

Advanced Materials

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The application of homogeneous catalysts in water remediation is limited by factors such as their excessive chemical and energy input, weak regenerability, and potential leaching. Heterogeneous catalytic membranes (CMs) offer a new approach to facilitating efficient, selective, and continuous pollutant degradation. Thus, integrating membranes and continuous filtration with heterogeneous advanced oxidation processes can promote thermodynamic and kinetic mass transfers in spatially confined intrapores and facilitate diffusion‐reaction processes. Despite the remarkable advantages of heterogeneous CMs, their engineering application has been practically restricted due to the fuzzy design criteria for specific applications. Herein, we critically review the recent advances in CMs for advanced water remediation and propose the design flow for tempospatially confined CMs. Further, we review state‐of‐the‐art CM materials and their catalytic mechanisms, after which we emphasize the tempospatial confinement mechanisms comprising the nanoconfinement effect, interface effect, and kinetic mass transfer, thus clarifying their roles in the construction and performance optimization of CMs. Additionally, we summarize the fabrication methods for CMs based on their catalysts and pore sizes and present an overview of their application and performance evaluations. Finally, we present future directions for CMs in materials research and water treatment.This article is protected by copyright. All rights reserved

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Metal-free carbon materials for persulfate-based advanced oxidation process: Microstructure, property and tailoring

Cited by 263 publications

References 258 publications

Evolution of Singlet Oxygen by Activating Peroxydisulfate and Peroxymonosulfate: A Review

Evolution of Singlet Oxygen by Activating Peroxydisulfate and Peroxymonosulfate: A Review

Advanced activation of persulfate by polymeric g-C3N4 based photocatalysts for environmental remediation: A review

Tempospatially Confined Catalytic Membranes for Advanced Water Remediation

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