Insights into the mechanism of nonradical reactions of persulfate activated by carbon nanotubes: Activation performance and structure-function relationship

Cheng, Xiaonong; Guo, Hongguang; Zhang, Yongli; Korshin, Gregory V.; Yang, Bo

doi:10.1016/j.watres.2019.03.096

Cited by 300 publications

(73 citation statements)

References 81 publications

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“…In addition, the generation of single oxygen ( 1 O 2 ) can also occur in the presence of the surface carbonyl groups as well as at O-MWCNTs defects. 32,33 The necessity of the NaPS adsorption on the walls of O-MWCNTs for their degradation is consistent with the experimental results of the hydrogel lms synthesis (Table 1). At low amounts of NaPS (0.0005 g), due to insufficient absorption of NaPS on the walls of O-MWCNTs, the degradation and subsequent hydrogel formation do not occur.…”

Section: Synthesis and Formation Mechanism Of The Nanocomposite Hydrogel Lmssupporting

confidence: 87%

“…This may be due to the partial dissolution of the hydrogel, which reduces the mass of the hydrogel and thus reduces the swelling ratio. 33 Table S2 † shows a summary of the results related to the swelling of different hydrogel films in distilled water during 76 h. According to Table S2, † the order of stability of different hydrogel films in distilled water is as follows: PC 2 I 2 H > PC 1 I 1 H > PC 0.5 I 1 H. PC 2 I 2 H hydrogel showed maximum stability and minimum reduction in swelling ratio compared with other hydrogels due to efficient crosslinking in the hydrogel network.…”

Section: Resultsmentioning

confidence: 99%

“…In the radical pathway, the activation of the persulfate in the presence of O-MWCNTs (via electron transfer) as well as thermal energy, leads to the dissociation of the O-O bond in the persulfate and ultimately the production of ROS (cOH and SO 4 c À ). [30][31][32][33] The non-radical pathway is conned to the surface of the O-MWCNTs, and ROS include the surface activated complex (O-MWCNT/persulfate), surface-bound SO 4 c À , and 1 O 2 . 30 The produced ROS in both pathways are capable of degrading various organic compounds, especially phenols.…”

Section: Synthesis and Formation Mechanism Of The Nanocomposite Hydrogel Lmsmentioning

confidence: 99%

“…In addition, part of the hydrogel may be dissolved in the warm water due to weak interactions between network and the O-MWCNT akes. 33 Fig. 8d shows the swelling curves of PC 1 I 1 H hydrogel in distilled water at different temperatures during 3 h. Based on Fig.…”

Section: Swelling Studiesmentioning

confidence: 99%

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Synthesis of physically crosslinked PAM/CNT flakes nanocomposite hydrogel films via a destructive approach

2021

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Section: Synthesis and Formation Mechanism Of The Nanocomposite Hydrogel Lmssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Section: Synthesis and Formation Mechanism Of The Nanocomposite Hydrogel Lmsmentioning

confidence: 99%

Section: Swelling Studiesmentioning

confidence: 99%

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Synthesis of physically crosslinked PAM/CNT flakes nanocomposite hydrogel films via a destructive approach

2021

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“…Also, SO ⋅− 4 has advantages such as pH independence [11], greater oxidation selectivity of organic pollutants, and longer lifetime during the reaction [12]. Peroxymonosulfate (PMS) activation-induced SO ⋅− 4 is usually generated via thermolysis, photolysis, photocatalysis, a metallic oxidant, and carbon materials [13][14][15][16]. Therein, activation of PMS assisted by a photocatalyst under visible light is environmentally sustainable and simple to perform without additional energy/chemical requirement.…”

Section: Introductionmentioning

confidence: 99%

Peroxymonosulfate Activation on a Hybrid Material of Conjugated PVC and TiO2 Nanotubes for Enhancing Degradation of Rhodamine B under Visible Light

Tran

Huan

et al. 2020

Advances in Polymer Technology

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Visible-light-driven photocatalysis is a robust technology for amending the negative effect of pollutants on the environment with a minimum energy use. Herein, we describe a simple approach to producing such a photocatalyst by coupling conjugated polyvinyl chloride (cPVC) with the TiO2 nanotube (TNT) thermolysis method. By activating peroxymonosulfate (PMS) to make a cPVC/TNT/PMS system using visible light as the source, we obtain a significant enhancement in the photocatalytic performance. We show that PMS use at a concentration of 3 mM can fully degrade rhodamine B (RhB) solution at a remarkably high concentration (200 mg L-1) just in 120 min under visible light. The cPVC/TNT/PMS system also shows excellent stability in recycling tests for at least five times. Further, by confining the active species in photocatalytic reactions, we report a thorough understanding of the extent of involvement from those radicals. Our work presents a robust approach to make a high-performance, visible-light-driven photocatalyst, which can be potentially used in practice.

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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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Insights into the mechanism of nonradical reactions of persulfate activated by carbon nanotubes: Activation performance and structure-function relationship

Cited by 300 publications

References 81 publications

Synthesis of physically crosslinked PAM/CNT flakes nanocomposite hydrogel films via a destructive approach

Synthesis of physically crosslinked PAM/CNT flakes nanocomposite hydrogel films via a destructive approach

Peroxymonosulfate Activation on a Hybrid Material of Conjugated PVC and TiO2 Nanotubes for Enhancing Degradation of Rhodamine B under Visible Light

Tempospatially Confined Catalytic Membranes for Advanced Water Remediation

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