Graphitic carbon nitride-based materials in activating persulfate for aqueous organic pollutants degradation: A review on materials design and mechanisms

Tan, Jie; Li, Zhifeng; Li, Jie; Wu, Junxue; Yao, Xiaolong; Zhang, Tingting

doi:10.1016/j.chemosphere.2020.127675

Cited by 96 publications

(23 citation statements)

References 165 publications

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“…In the last decade, (SO 4 •- ) based treatment processes have gained attention due not only to the high oxidation power of sulphate radicals (E° = 2.5–3.1 V vs. SHE), but also to their nonselective reactivity ( Zhi et al., 2020 ). The SO 4 •- radical species is therefore a powerful oxidant that rapidly attacks a variety of organic compounds, as well as pathogen membrane structures; following reaction pathways that are similar to those that characterize • OH chemistry, ( Tan et al., 2021 ).…”

Section: Indirect Oxidationmentioning

confidence: 99%

Photo-assisted electrochemical advanced oxidation processes for the disinfection of aqueous solutions: A review

et al. 2021

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Disinfection is usually the final step in water treatment and its effectiveness is of paramount importance in ensuring public health. Chlorination, ultraviolet (UV) irradiation and ozone (O 3 ) are currently the most common methods for water disinfection; however, the generation of toxic by-products and the non-remnant effect of UV and O 3 still constitute major drawbacks. Photo-assisted electrochemical advanced oxidation processes (EAOPs) on the other hand, appear as a potentially effective option for water disinfection. In these processes, the synergism between electrochemically produced active species and photo-generated radicals, improve their performance when compared with the corresponding separate processes and with other physical or chemical approaches. In photo-assisted EAOPs the inactivation of pathogens takes place by means of mechanisms that occur at different distances from the anode, that is: (i) directly at the electrode’s surface (direct oxidation), (ii) at the anode’s vicinity by means of electrochemically generated hydroxyl radical species (quasi-direct), (iii) or at the bulk solution (away from the electrode surface) by photo-electrogenerated active species (indirect oxidation). This review addresses state of the art reports concerning the inactivation of pathogens in water by means of photo-assisted EAOPs such as photo-electrocatalytic process, photo-assisted electrochemical oxidation, photo-electrocoagulation and cathodic processes. By focusing on the oxidation mechanism, it was found that while quasi-direct oxidation is the preponderant inactivation mechanism, the photo-electrocatalytic process using semiconductor materials is the most studied method as revealed by numerous reports in the literature. Advantages, disadvantages, trends and perspectives for water disinfection in photo-assisted EAOPs are also analyzed in this work.

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Section: Indirect Oxidationmentioning

confidence: 99%

Photo-assisted electrochemical advanced oxidation processes for the disinfection of aqueous solutions: A review

et al. 2021

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“…Hydrothermal-copolymerization route 226. 19 2.68 Broad visible-light-responsive range, more exposed active, and efficient separation of photogenerated carriers [38] porous Ba-P-codoped g-C 3 N 4 microtubes Ba-and P-codoped hydrothermal method 181.3 2. 52 Increase the specific surface area and visible light harvesting and narrow the bandgap [39] Tubular g-C 3 N 4 H 2 SO 4 -assisted precursor self-assembly strategy 92.04 2.78 High specific surface area and efficient charge separation [40] g-C 3 N 4 hierarchical mesoporous spheres Supramolecular assembly mediated synthesis 58.5 2.60 More active sites, favorable mass-transfer process and shorter diffusion path of charge carriers [41] g-C 3 N 4 with tetragonal microtube structure Hydrothermal method 76.8 2.…”

Section: Construction Of Nanostructuresmentioning

confidence: 99%

“…The novel carbon materials represented by graphene are considered to be excellent ligands for constructing metal‐free g‐C 3 N 4 heterostructures due to their nontoxicity, high specific surface area, good conductivity, high light absorption, stable chemical properties, and abundant surface functional groups. [ 19 ] Carbon materials can be used as excellent electron acceptors and transport channels, which can significantly improve the separation efficiency of photogenerated e − /h + pairs in g‐C 3 N 4 . The atomic arrangement, defects, and functional groups in carbon materials can endow carbon/g‐C 3 N 4 heterojunctions with many active sites.…”

Section: G‐c3n4‐based Heterojunction Photocatalyst and Its Enhancemen...mentioning

confidence: 99%

“…However, pristine g-C 3 N 4 photocatalysts still have several shortcomings that hinder their use as practical photocatalysts: [18][19][20][21] a) their light absorption efficiency at 460 nm is low; b) the catalytic process of pristine g-C 3 N 4 has a high recombination rate of photogenerated e − /h + pairs and a low conductivity; c) g-C 3 N 4 prepared by thermal polymerization has a low specific surface area and low catalytic efficiency, and lacks active sites. For these reasons, researchers have constantly tried to modify the microstructure and surface properties of g-C 3 N 4 .…”

Section: Introductionmentioning

confidence: 99%

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Recent Advances in g‐C₃N₄‐Based Photocatalysts for Pollutant Degradation and Bacterial Disinfection: Design Strategies, Mechanisms, and Applications

Yang

Sun

et al. 2021

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Rhodamine B (RhB), and methyl orange (MO), are highly toxic and can directly negatively affect the ecosystem and human health through water circulation. Pathogens, such as fungi and bacteria, can disrupt aquatic ecosystems and are closely linked to the incidence of epidemics. [2][3][4][5][6] In developing countries, it is estimated that about 80% of diseases are caused by water-borne pathogens. The abuse of antibiotics has led to their accumulation in the environment, which have given rise to antibiotic-resistant bacteria, and ultimately led to incurable infections that have increased death rates around the world; [7,8] therefore, the effective treatment of organic dye, pathogen, and antibiotic pollutants is a major environmental remediation task.At present, photocatalysis technology can convert solar energy into electric energy, chemical energy, etc., so that solar energy can be directly applied to environmental catalysis, energy catalysis, organic catalysis, sensing, biological imaging, electrochemical energy storage, and other fields. [9] It is considered one of the sustainability strategies to address future environmental crises. [10][11][12] The development of photocatalytic materials determines the progress in photocatalytic technologies. In 1972, Fujishima and Honda [13] used a TiO 2 -modified electrode to decompose water by direct photocatalysis using UV light, which was a milestone that initiated the development of photocatalytic materials. Then, Carey et al. [14] used TiO 2 powder to degrade organic pollutants, which further stimulated researchers' interest in photocatalytic materials. Since then, the development, modification, application, and catalytic mechanism of semiconductor photocatalytic materials represented by TiO 2 have made considerable progress. As research in this field progressed, it was found that the performance of photocatalytic materials mainly depends on the light absorption and electronhole separation efficiency of the photocatalyst; however, due to their wide bandgap, traditional TiO 2 photocatalysts can only use UV light with wavelengths below 387 nm, which account for 5% of the solar energy. To realize the maximum solar energy efficiency, researchers have made many attempts to modify TiO 2 -based photocatalysts. Although the spectral response range and the availability of solar energy have been improved slightly, there are still problems, such as high costs and heavy metal pollution; therefore, a popular research direction has Emerging photocatalytic technology promises to provide an effective solution to the global energy crisis and environmental pollution. Graphite carbon nitride (g-C 3 N 4 ) has gained extensive attention in the scientific community due to its excellent physical and chemical properties, attractive electronic band structure, and low cost. In this paper, research progress in design strategies for g-C 3 N 4 -based photocatalysts in the past five years is reviewed from the perspectives of nanostructure construction, element doping, and heterostructure construction...

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“…Compared with persulfate activation by alkali, transition metals and radiation, thermal activation and iron-/carbon-based activation are more environmentally friendly and cost-effective, being promising for field applications (Li et al, 2020;Ma et al, 2021). The detailed activation methods have been comprehensively reviewed very recently (Matzek and Carter, 2016;Pang et al, 2019;Zhi et al, 2020;Karim et al, 2021;Tan et al, 2021).…”

Section: Principles Of Paomentioning

confidence: 99%

Integration of microbial reductive dehalogenation with persulfate activation and oxidation (Bio-RD-PAO) for complete attenuation of organohalides

Wang

2021

Front. Environ. Sci. Eng.

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Due to the toxicity of bioaccumulative organohalides to human beings and ecosystems, a variety of biotic and abiotic remediation methods have been developed to remove organohalides from contaminated environments. Bioremediation employing organohalide-respiring bacteria (OHRB)-mediated microbial reductive dehalogenation (Bio-RD) represents a cost-effective and environmentally friendly approach to attenuate highly-halogenated organohalides, specifically organohalides in soil, sediment and other anoxic environments. Nonetheless, many factors severely restrict the implications of OHRB-based bioremediation, including incomplete dehalogenation, low abundance of OHRB and consequent low dechlorination activity. Recently, the development of in situ chemical oxidation (ISCO) based on sulfate radicals (SO 4 ·− ) via the persulfate activation and oxidation (PAO) process has attracted tremendous research interest for the remediation of lowly-halogenated organohalides due to its following advantages, e.g., complete attenuation, high reactivity and no selectivity to organohalides. Therefore, integration of OHRB-mediated Bio-RD and subsequent PAO (Bio-RD-PAO) may provide a promising solution to the remediation of organohalides. In this review, we first provide an overview of current progress in Bio-RD and PAO and compare their limitations and advantages. We then critically discuss the integration of Bio-RD and PAO (Bio-RD-PAO) for complete attenuation of organohalides and its prospects for future remediation applications. Overall, Bio-RD-PAO opens up opportunities for complete attenuation and consequent effective in situ remediation of persistent organohalide pollution.

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Graphitic carbon nitride-based materials in activating persulfate for aqueous organic pollutants degradation: A review on materials design and mechanisms

Cited by 96 publications

References 165 publications

Photo-assisted electrochemical advanced oxidation processes for the disinfection of aqueous solutions: A review

Photo-assisted electrochemical advanced oxidation processes for the disinfection of aqueous solutions: A review

Recent Advances in g‐C₃N₄‐Based Photocatalysts for Pollutant Degradation and Bacterial Disinfection: Design Strategies, Mechanisms, and Applications

Integration of microbial reductive dehalogenation with persulfate activation and oxidation (Bio-RD-PAO) for complete attenuation of organohalides

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Graphitic carbon nitride-based materials in activating persulfate for aqueous organic pollutants degradation: A review on materials design and mechanisms

Cited by 96 publications

References 165 publications

Photo-assisted electrochemical advanced oxidation processes for the disinfection of aqueous solutions: A review

Photo-assisted electrochemical advanced oxidation processes for the disinfection of aqueous solutions: A review

Recent Advances in g‐C3N4‐Based Photocatalysts for Pollutant Degradation and Bacterial Disinfection: Design Strategies, Mechanisms, and Applications

Integration of microbial reductive dehalogenation with persulfate activation and oxidation (Bio-RD-PAO) for complete attenuation of organohalides

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Product

Resources

About

Recent Advances in g‐C₃N₄‐Based Photocatalysts for Pollutant Degradation and Bacterial Disinfection: Design Strategies, Mechanisms, and Applications