Construction of melem/g-C3N4/vermiculite hybrid photocatalyst with sandwich structure
Source abstract
Abstract
Abstract Melem/g-C3N4/vermiculite hybrid photocatalyst (CNV-X) with a sandwich structure for degrading tetracycline was constructed by hydrothermally treating the pre-synthesized g-C3N4/vermiculite composite (CNV). With the enhancement of hydrothermal temperature, part of g-C3N4 was gradually transformed into thorn-ball-like melem, the specific surface area of the samples increased step by step from 9.88 m2/g for CNV to 33.93 m2/g for the sample hydrothermally treated at 180 °C (CNV-180). Then, the specific surface area of CNV-X dramatically decreased to 6.36 m2/g when hydrothermally treated at 200 °C. The variation trend of photocatalytic performance of CNV-X samples with the hydrothermal temperature was similar to that of specific surface area. CNV-180 exhibited the optimum photocatalytic performance, it (0.05 g) degraded 81.82% of tetracycline molecules (100 ml, 20 mg/L) after photocatalysis for 120 min, and the reaction rate constant (0.0137 min−1) was 2.74× that of pure g-C3N4. CNV-180 exhibited excellent stability and reusability which degraded 77.68% of tetracycline molecules after five 120-min cycles. The degradation rate of the melem/g-C3N4/vermiculite composite with respect to tetracycline was 77.68% after five 120-min cycles. The significant improved photocatalytic activity was due to the enhanced specific surface area, the enhanced optical absorption property, prohibited recombination, and accelerated separation and transfer efficiency of photo-generated electron-hole pairs, which can be ascribed to the sandwich structure, the heterojunction of g-C3N4/melem, and the electrostatic repulsion between photo-generated electrons and the permanent negative charges of the vermiculite layers. Moreover, the band structure, the main active substance (·O2−), and a photocatalytic mechanism were proposed. Thus, this study provided a promising approach to photo-degradation of tetracycline and potential applications to vermiculite-based photocatalytic materials.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Covalent Organic Framework Applications · Advanced Nanomaterials in Catalysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (57)
Show source-provided references
1. Complete removal of endocrine disrupting compound and toxic dye by visible light active porous g-C3N4/H-ZSM-5 nanocomposite10.1016/j.chemosphere.2019.124981 ↗
2. Polymeric Photocatalysts based on Graphitic Carbon Nitride10.1002/adma.201500033 ↗
3. Environmentally benign synthesis of branched Bi2O3-Bi2S3 photocatalysts by an etching and re-growth method10.1039/C4TA05346J ↗
4. Ionic treatment for removal of sulfonamide and tetracycline classes of antibiotic10.1016/j.scitotenv.2007.07.024 ↗
5. Removal of antibiotics by coagulation and granular activated carbon filtration10.1016/j.jhazmat.2007.05.059 ↗
6. Melem: a metal-free unit for photocatalytic hydrogen evolution10.1016/j.ijhydene.2014.02.052 ↗
7. Tetracycline antibiotics in the environment: a review10.1007/s10311-013-0404-8 ↗
8. Engineering the nanoarchitecture and texture of polymeric carbon nitride semiconductor for enhanced visible light photocatalytic activity10.1016/j.jcis.2013.03.034 ↗
9. Preparation of g-C3N4/vermiculite composite with improved visible light photocatalytic activity
10. g-C3N4-based heterostructured photocatalysts
11. Effect of particle size of vermiculite on the microstructure and photocatalytic performance of g-C3N4/vermiculite composite10.1016/j.solidstatesciences.2021.106533 ↗
12. Simple solvothermal routes to synthesize 3D BiOBrxI1-x microspheres and their visible-light-induced photocatalytic properties10.1021/ie102310a ↗
13. Melem (2,5,8-triamino-tri-s-triazine), an important intermediate during condensation of melamine rings to graphitic carbon nitride: Synthesis, structure determination by X-ray powder diffractometry, solid-state NMR, and theoretical studies10.1021/ja0357689 ↗
14. Modulated BiOCl nanoplates with porous g-C3N4 nanosheets for photocatalytic degradation of color/colorless pollutants in natural sunlight
15. Degradation of chlorotetracycline and bacterial disinfection in livestock wastewater by ozone-based advanced oxidation10.1016/j.jiec.2011.05.006 ↗
16. Highly efficient g-C3N4/TiO2/kaolinite composite with novel three-dimensional structure and enhanced visible light responding ability towards ciprofloxacin and S. aureus10.1016/j.apcatb.2017.08.044 ↗
17. A facile approach to synthesize novel oxygen-doped g-C3N4 with superior visible-light photoreactivity10.1039/c2cc35862j ↗
18. Semiconductor polymeric graphitic carbon nitride photocatalysts: the “holy grail” for the photocatalytic hydrogen evolution reaction under visible light10.1039/C9EE00717B ↗
19. Emerging graphitic carbon nitride-based materials for biomedical applications
20. Fate of tetracycline in enhanced biological nutrient removal process10.1016/j.chemosphere.2017.11.136 ↗
21. From Triazine to heptazine: Origin of graphitic carbon nitride as a photocatalyst10.1021/acsomega.0c01607 ↗
22. Metal-free melem/g-C3N4 hybrid photocatalysts for water treatment10.1016/j.jcis.2015.11.003 ↗
23. A review on zinc and nickel adsorption on natural and modified zeolite, bentonite and vermiculite: examination of process parameters, kinetics and isotherms10.1016/j.jhazmat.2013.03.024 ↗
24. Construction of a Z-scheme 1D/2D FeV3O8/g-C3N4 composite for ibuprofen degradation: mechanism insight, theoretical calculation and degradation pathway dagger10.1039/D1CY00025J ↗
25. The enhanced photocatalytic activity of ultrasonic spray reduction of silver nanoclusters over lamellar graphite carbon nitride: Interface reaction, theoretical calculation and degradation pathway10.1016/j.apt.2021.03.023 ↗
26. Hydrothermal synthesis of oxidized g-C3N4 and its regulation of photocatalytic activity10.1039/C4TA04041D ↗
27. Enhanced photocatalytic degradation of industrial dye by g-C3N4/TiO2 nanocomposite: Role of shape of TiO210.1016/j.apt.2019.03.004 ↗
28. 2D/2d heterojunction of MoS2/g-C3N4 nanoflowers for enhanced visible-light-driven photocatalytic and electrochemical degradation of organic pollutants
29. Ternary g-C3N4/Ag/BiVO4 nanocomposite: Fabrication and implementation to remove organic pollutants10.1016/j.eti.2021.101646 ↗
30. Nitrogen vacancy-promoted photocatalytic activity of graphitic carbon nitride10.1021/jp301026y ↗
31. Structure of Z-scheme CdS/CQDs/BiOCl heterojunction with enhanced photocatalytic activity for environmental pollutant elimination10.1016/j.apsusc.2018.01.189 ↗
32. Alteration of swelling clay minerals by acid activation10.1016/j.clay.2009.02.002 ↗
33. Synergistic activation of peroxymonosulfate via in situ growth FeCo2O4 nanoparticles on natural rectorite: role of transition metal ions and hydroxyl groups10.1016/j.chemosphere.2020.127965 ↗
34. Highly stable 3D/2D WO3/g-C3N4 Z-scheme heterojunction for stimulating photocatalytic CO2 reduction by H2O/H2 to CO and CH4 under visible light10.1016/j.jcou.2020.101270 ↗
35. 2D/2D Mt/m-CN composite with enriched interface charge transfer for boosting photocatalytic CO2 hydrogenation by H2 to CH4 under visible light
36. 2D/2D/2D O-C3N4/Bt/Ti3C2Tx heterojunction with novel MXene/clay multi-electron mediator for stimulating photo-induced CO2 reforming to CO and CH4
37. In-situ growth of TiO2 imbedded Ti3C2TA nanosheets to construct PCN/Ti3C2TA MXenes 2D/3D heterojunction for efficient solar driven photocatalytic CO2 reduction towards CO and CH4 production10.1016/j.jcis.2021.01.099 ↗
38. Tubular graphitic-C3N4: a prospective material for energy storage and green photocatalysis10.1039/c3ta13291a ↗
39. Photocatalytic Property of TiO2-Vermiculite Composite Nanofibers via Electrospinning10.1186/s11671-015-0977-1 ↗
40. Reactive sites rich porous tubular yolk-shell g-C3N4 via precursor recrystallization mediated microstructure engineering for photoreduction10.1016/j.apcatb.2019.04.036 ↗
41. Montmorillonite dispersed single wall carbon nanotubes (SWCNTs)/TiO2 heterojunction composite for enhanced dynamic photocatalytic H2 production under visible light10.1016/j.clay.2019.03.029 ↗
42. A review of recent advances in two-dimensional natural clay vermiculite-based nanomaterials
43. Towards mass production of a spherical montmorillonite@covalent organic framework@gold nanoparticles heterostructure as a high-efficiency catalyst for reduction of methylene blue
44. Spherical montmorillonite-supported molybdenum disulfide nanosheets as a self-sedimentary catalyst for organic pollutants removal
45. Degradation of antibiotics by advanced oxidation processes: an overview
46. Spherical montmorillonite-supported nano-silver as a self-sedimentary catalyst for methylene blue removal10.1016/j.clay.2019.03.021 ↗
47. Probing paramagnetic species in titania-based heterogeneous photocatalysis by electron spin resonance (ESR) spectroscopy-a mini review10.1016/j.cej.2010.12.002 ↗
48. In situ one-step hydrothermal synthesis of oxygen-containing groups-modified g-C3N4 for the improved photocatalytic H2-evolution performance10.1016/j.apsusc.2017.08.050 ↗
49. Soluble g-C3N4 nanosheets: facile synthesis and application in photocatalytic hydrogen evolution10.1016/j.apcatb.2019.01.088 ↗
50. Porous montmorillonite@graphene oxide@Au nanoparticle composite microspheres for organic dye degradation10.1021/acsanm.9b01043 ↗
51. Expansion property of vermiculite from Weili, Xinjiang
52. CN/rGO@BPQDs high-low junctions with stretching spatial charge separation ability for photocatalytic degradation and H2O2 production
53. Steering charge kinetics in metal-free g-C3N4/melem hybrid photocatalysts for highly efficient visible-light-driven hydrogen evolution
54. Efficient visible light photocatalytic antibiotic elimination performance induced by nanostructured Ag/AgCl@Ti3+-TiO2 mesocrystals10.1016/j.cej.2020.126359 ↗
55. Exfoliated graphitic carbon nitride nanosheets/gold nanoparticles/spherical montmorillonite ternary porous heterostructures for the degradation of organic dyes10.1021/acsanm.0c01355 ↗
56. Tissue-specific bioaccumulation of human and veterinary antibiotics in bile, plasma, liver and muscle tissues of wild fish from a highly urbanized region10.1016/j.envpol.2014.12.026 ↗
57. Melem: an efficient metal-free luminescent material10.1039/C7TC02966G ↗