Construction of g-C3N4/TiO2/Ag composites with enhanced visible-light photocatalytic activity and antibacterial properties
Source abstract
Abstract
Abstract In this study, the multifunctional carbon nitride based composite graphitic-C3N4 (g-C3N4)/TiO2/Ag was prepared through a simple and efficient vacuum freeze-drying route. TiO2 and Ag nanoparticles were demonstrated to decorate onto the surface of g-C3N4 sheet. In the ultraviolet–visible absorption test, a narrower band gap and red-shift of light absorption edge were observed for g-C3N4/TiO2/Ag compared to pristine g-C3N4 and single-component modified g-C3N4/TiO2. The photodegradation property of g-C3N4/TiO2/Ag was investigated toward the degradation of methylene blue (abbreviated as MB) under the irradiation of visible light. These results indicated that the degradation performance of organic dyes for g-C3N4/TiO2/Ag was obviously improved compared with g-C3N4/TiO2 and g-C3N4. The reaction rate constant of MB degradation for g-C3N4/TiO2/Ag was 4.24 times higher than that of pristine g-C3N4. In addition, such rationally constructed nanocomposite presented evidently enhanced antibacterial performance against the Gram-negative Escherichia coli. Concentration dependent antibacterial performance was systematically investigated. And 84% bacterial cell viability loss had been observed at 500 μg/mL g-C3N4/TiO2/Ag within 2 h visible light irradiation.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Advanced Nanomaterials in Catalysis · Gas Sensing Nanomaterials and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (34)
Show source-provided references
1. Self-organized TiO2 nanotube layers as highly efficient photocatalysts10.1002/smll.200600426 ↗
2. Anatase TiO2 single crystals with a large percentage of reactive facets10.1038/nature06964 ↗
3. Development of alternative photocatalysts to TiO2: challenges and opportunities10.1039/b907933e ↗
4. Zn-doped CdS nanoarchitectures prepared by hydrothermal synthesis: mechanism for enhanced photocatalytic activity and stability under visible light10.1021/jp300939q ↗
5. Photocatalysis on TiO2 surfaces: principles, mechanisms, and selected results10.1021/cr00035a013 ↗
6. Photocatalytic degradation of organic pollutants with Ag decorated free-standing TiO2 nanotube arrays and interface electrochemical response10.1039/C0JM02404J ↗
7. Modification of Zr-doped titania nanotube arrays by urea pyrolysis for enhanced visible-light photoelectrochemical H2 generation10.1016/j.electacta.2012.09.023 ↗
8. Tailored TiO2-SrTiO3 heterostructure nanotube arrays for improved photoelectrochemical performance10.1021/nn901087c ↗
9. Predicting useful materials10.1126/science.261.5119.307 ↗
10. A metal-free polymeric photocatalyst for hydrogen production from water under visible light10.1038/nmat2317 ↗
11. Graphitic-C3N4 hybridized TiO2 nanosheets with reactive {001} facets to enhance the UV- and visible-light photocatalytic activity10.1016/j.jhazmat.2014.01.021 ↗
12. Improved photocatalytic activity of g-C3N4/TiO2 composites prepared by a simple impregnation method10.1016/j.jphotochem.2012.12.014 ↗
13. Synthesis of g-C3N4/TiO2 with enhanced photocatalytic activity for H2 evolution by a simple method10.1016/j.ijhydene.2014.02.020 ↗
14. Construction of heterostructured g-C3N4/Ag/TiO2 microspheres with enhanced photocatalysis performance under visible-light irradiation10.1021/am503674e ↗
15. Montmorillonite-supported Ag/TiO2 nanoparticles: an efficient visible-light bacteria photodegradation material10.1021/am900743d ↗
16. Plasmonic-metal nanostructures for efficient conversion of solar to chemical energy10.1038/nmat3151 ↗
17. Fabrication of heterostructured g-C3N4/Ag-TiO2 hybrid photocatalyst with enhanced performance in photocatalytic conversion of CO2 under simulated sunlight irradiation10.1016/j.apsusc.2017.01.041 ↗
18. Synthesis, characterization, organic compound degradation activity and antimicrobial performance of g-C3N4 sheets customized with metal nanoparticles-decorated TiO2 nanofibers10.1039/C6RA04869B ↗
19. Heterostructured g-C3N4/Ag-TiO2 composites with efficient photocatalytic performance under visible-light irradiation10.1039/C5RA07541F ↗
20. Biomimetic synthesis of C3N4/TiO2/Ag nanosheet composites with high visible-light photocatalytic performance10.1039/C5RA06980G ↗
21. Synthesis of porous ceramics with complex pore structure by freeze-dry processing10.1111/j.1151-2916.2001.tb00638.x ↗
22. Synthesis of porous silicon nitride with unidirectionally aligned channels using freeze-drying process10.1111/j.1151-2916.2002.tb00426.x ↗
23. A multiphase porous medium transport model with distributed sublimation front to simulate vacuum freeze drying10.1016/j.fbp.2014.08.011 ↗
24. Facile in situ synthesis of graphitic carbon nitride (g-C3N4)-N-TiO2 heterojunction as an efficient photocatalyst for the selective photoreduction of CO2 to CO10.1016/j.apcatb.2014.03.037 ↗
25. Preparation and photocatalytic properties of g-C3N4/TiO2 hybrid composite10.1016/S1005-0302(10)60149-1 ↗
26. Construction of high-dispersed Ag/Fe3O4/g-C3N4 photocatalyst by selective photo-deposition and improved photocatalytic activity10.1016/j.apcatb.2015.09.029 ↗
27. Metal-free activation of H2O2 by g-C3N4 under visible light irradiation for the degradation of organic pollutants10.1039/C1CP22820J ↗
28. One pot synthesis and characterization of Ag-ZnO/g-C3N4 photocatalyst with improved photoactivity and antibacterial properties10.1016/j.colsurfa.2015.07.003 ↗
29. One-step thermal synthesis of Ag-modified g-C3N4/N-doped TiO2 hybrids with enhanced visible-light photocatalytic activity10.1007/s10853-016-0414-6 ↗
30. Mesoporous black TiO2-x/Ag nanospheres coupled with g-C3N4, nanosheets as 3D/2D ternary heterojunctions visible light photocatalysts10.1016/j.jhazmat.2017.09.031 ↗
31. Bactericidal and detoxification effects of TiO2 thin film photocatalysts10.1021/es970860o ↗
32. Preparation and antibacterial activity of Ag-TiO2 composite film by liquid phase deposition (LPD) method10.1007/s12034-008-0011-7 ↗
33. Graphitic C3N4 sensitized TiO2 nanotube layers: a visible light activated efficient metal-free antimicrobial platform10.1002/chem.201505173 ↗
34. Visible-light-driven enhanced antibacterial and biofilm elimination activity of graphitic carbon nitride by embedded Ag nanoparticles10.1007/s12274-014-0654-1 ↗