Cooperatively modulating reactive oxygen species generation and bacteria-photocatalyst contact over graphitic carbon nitride by polyethylenimine for rapid water disinfection

Zeng, Xiangkang; Liu, Yue; Xia, Yun; Uddin, Hemayet; Xia, Dehua; McCarthy, David Thomas; Deletić, Ana; Yu, Jiaguo; Zhang, Xiwang

doi:10.1016/j.apcatb.2020.119095

Cited by 107 publications

(59 citation statements)

References 43 publications

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“…Almost any organic compounds can be photooxidized on TiO2 surface to CO2 and H2O [2,[5][6][7][8]. Viruses and bacteria can be destroyed over the photocatalytic surface as well [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Optimal H2O2 concentration in advanced oxidation over titanium dioxide photocatalyst

Danyliuk

Mironyuk

Tatarchuk

et al. 2021

Phys. Chem. Solid St.

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The oxidative degradation of Rhodamine B dye under ultraviolet irradiation was studied. The degradation rate was measured with using of smartphone camera. Photocatalytic degradation of the Rhodamine B dye over the P25-TiO2 catalyst has been found to accelerate substantially in the presence of hydrogen peroxide. The relationship between the photocatalytic degradation rate and H2O2 concentration has been studied. The optimal concentration of H2O2 has been found to in the range of 10-25 mM. The proposed mixture of P25 photocatalyst and H2O2 oxidizer can be used to remove organic pollutions from industrial waste water.

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Section: Introductionmentioning

confidence: 99%

Optimal H2O2 concentration in advanced oxidation over titanium dioxide photocatalyst

Danyliuk

Mironyuk

Tatarchuk

et al. 2021

Phys. Chem. Solid St.

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“…[9] Polyethylenimine was grafted onto CNNS, which can adhere to bacterial by electrostatic with promoting •O 2− and H 2 O 2 generation, and changing the disinfection pathway. [100] It is worth noting that the treatment of g-C 3 N 4 with strong acid and oxidants results in a few final products and the process is dangerous although this method can obtain a very high photocatalytic bactericidal effect.…”

Section: G-c 3 N 4 -Based Photocatalysts Are Applied In Sterilizationmentioning

confidence: 99%

Graphitic Carbon Nitride‐Based Photocatalysts for Biological Applications

Che

Zhang

Wang

et al. 2021

Advanced Sustainable Systems

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fluorescent feature, which makes it be served as bioimaging and fluorescence sensors. In addition, g-C 3 N 4 can be used as a drug carrier due to its π-π conjugation with the drug. It can thus be seen that g-C 3 N 4 is a 2D material with many functions in one. As a result, with the development of g-C 3 N 4 -based materials in biological fields, it is urgent to provide a comprehensive review of g-C 3 N 4 -based materials for biological applications.Like other applications, biological applications of g-C 3 N 4 -based materials are still limited by the reason of relatively large particles size, high recombination of carriers, and circumscribed visible-light absorption. [13] Therefore, in this review, the advanced synthesis approaches to improve the properties of g-C 3 N 4 -based materials are outlined and the different solutions to different problems of different applications are reported at great length. For example, three kinds of ways to improve the efficiency of photodynamic therapy (PDT) such as improving the near-infrared response of g-C 3 N 4 , [14] increasing oxygen levels in the microenvironment, [15] and reducing the glutathione (GSH) level in tumor cells are talked about. [16] Moreover, the biosafety and toxicity evaluations of g-C 3 N 4 -based materials are also conducted. Last, the challenges and personal opinions of g-C 3 N 4 -based materials in biomedical applications are discussed. It is hoped that this review could provide references and bases for further expanding the applications of g-C 3 N 4 in biomedical areas. Modification MethodsAt present, the photocatalytic performance of g-C 3 N 4 can be enhanced by defects, [17] hydrogen bond engineering, [18] and integrating with other semiconductors to form a heterojunction structure. [19] Defects EngineeringDefects engineering of g-C 3 N 4 includes vacancy defect and crystal defect. Vacancy in g-C 3 N 4 is served as effective capturing sites for photocarriers to promote charge separation and migration. [20] Doping is an impurity defect belonging to a crystal defect. Impurity defects generally do not change the crystal lattice of the original matrix, but will activate due to lattice malformation and provide conditions for the migration of particles.Metal-free graphitic carbon nitride (g-C 3 N 4 ) as a newly emerging nanomaterial has been employed in the biomedical field because of its special optical and electrical characterizations. This review summarizes diverse methods for preparing g-C 3 N 4 -based materials, and discusses contemporary advancements in biosensors, photocatalytic sterilization, photodynamic therapy, drug carrier, and biological imaging. The biosafety and toxicity evaluations of g-C 3 N 4 -based materials are discussed as well. The review ends with an overview and several insights on the challenges and opportunities of g-C 3 N 4 -based nanomaterials in this burgeoning field. This review is expected to provide inspiration for developing future g-C 3 N 4 -based materials for the biomedical applications.

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“…Moreover, the proton‐rich amino groups of the PEI molecules were beneficial to the direct photocatalyst‐bacteria adhesion via electrostatic interaction, which promoted better use of the photocatalytically generated ROS for inactivation (Figure 8b). [ 163 ]…”

Section: Ros‐induced Bacteria Inactivation Over 2d Semiconductorsmentioning

confidence: 99%

“…Reproduced with permission. [ 163 ] Copyright 2020, Elsevier Inc. c) Schematic of the photocatalytic H 2 O 2 formation over the g‐C 3 N 4 /1 T‐MoS 2 heterojunction and its application in bacterial inactivation. Reproduced with permission.…”

Section: Ros‐induced Bacteria Inactivation Over 2d Semiconductorsmentioning

confidence: 99%

Solar‐Driven Photocatalytic Disinfection Over 2D Semiconductors: The Generation and Effects of Reactive Oxygen Species

Liu

Zeng

et al. 2020

Solar RRL

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Solar‐driven photocatalysis has been developing as a sustainable process and it holds appreciable promise to address the pollutants and risks posed by biohazards. The unique geometrical and electric features of 2D semiconductors have nurtured a variety of advanced photocatalytic bactericides where oxidative oxygen species are generated as the main disinfection reagents. Herein, the state‐of‐the‐art progress of solar‐driven photocatalytic disinfection based on 2D semiconductors with an emphasis on the generation and effects of various reactive oxygen species is summarized. Moreover, the immobility of the photocatalyst for practical applications is discussed. Finally, perspectives and challenges are presented to guide future research on photocatalytic disinfection.

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Cooperatively modulating reactive oxygen species generation and bacteria-photocatalyst contact over graphitic carbon nitride by polyethylenimine for rapid water disinfection

Cited by 107 publications

References 43 publications

Optimal H2O2 concentration in advanced oxidation over titanium dioxide photocatalyst

Optimal H2O2 concentration in advanced oxidation over titanium dioxide photocatalyst

Graphitic Carbon Nitride‐Based Photocatalysts for Biological Applications

Solar‐Driven Photocatalytic Disinfection Over 2D Semiconductors: The Generation and Effects of Reactive Oxygen Species

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