Synthesis of Z-Scheme heterojunction ZnNb2O6/g-C3N4 nanocomposite as a high efficient photo-catalyst for the degradation of 2,4-DCP under simulated sunlight
Source abstract
Abstract
Abstract In view of the deterioration of the environment and the shortage of resources, it is necessary to develop efficient photocatalysts for the degradation of organic pollutants. Herein, a novel and environmentally friendly ZnNb2O6/g-C3N4 heterojunction nanocomposite was synthesized by calcination-hydrothermal method successfully. The chemical and physical capabilities of the material were characterized by various kinds of analytical instruments. Compared with ZnNb2O6 and g-C3N4, ZnNb2O6/g-C3N4 showed the strongest photocatalytic activity. The nanomaterial was used in the removal of the pollutant 2,4-DCP. The effects of degradation conditions were discussed including component ratio, material dosage, initial analyte concentration, pH and salinity. After 180 min’ simulated sunlight illumination, the removal efficiency of 2,4-DCP (10 mg/L) reached 95.7% under the optimum condition. Furthermore, the possible photocatalytic mechanisms were discussed according to four aspects: (i) The conformation of the active species; (ii) The calculation of valence and conduction band; (iii) The analysis Z-scheme heterojunction mechanism; (iv) The speculation of feasible photocatalytic paths. In conclusion, the ZnNb2O6/g-C3N4 (ZC-7) nanocomposite has the least recombination rate of electron-hole pairs and the highest photocatalytic efficiency.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Covalent Organic Framework Applications · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (46)
Show source-provided references
1. Ferrocene-based nanoporous organic polymer as solid-phase extraction sorbent for the extraction of chlorophenols from tap water, tea drink and peach juice samples10.1016/j.foodchem.2019.124962 ↗
2. Protocells self-assembled by hydroxyapatite nanoparticles: highly efficient and selective enrichment of chlorophenols in an aqueous environment10.1016/j.chemosphere.2019.05.230 ↗
3. Exposure to bisphenol A, chlorophenols, benzophenones, and parabens in relation to reproductive hormones in healthy women: A chemical mixture approach10.1016/j.envint.2018.07.028 ↗
4. Two-dimensional covalent-organic-framework-derived nitrogen-rich carbon nanosheets modified with small Pd nanoparticles for the hydrodechlorination of chlorophenols and hydrogenation of phenol10.1016/j.apcata.2018.09.028 ↗
5. Performance of photo-catalytic oxidation for degradation of chlorophenols: optimization of reaction parameters and quantification of transformed oxidized products10.1016/j.jhazmat.2018.08.055 ↗
6. Structure tuning of polymeric carbon nitride for solar energy conversion: from nano to molecular scale10.1016/j.chempr.2019.07.019 ↗
7. Interfacial engineering of graphitic carbon nitride (g-C3N4)-based metal sulfide heterojunction photocatalysts for energy conversion: a review10.1016/S1872-2067(19)63293-6 ↗
8. Enhanced photocatalytic activity of transition metal ions doped g-C3N4 nanosheet activated by PMS for organic pollutant degradation
9. Role of Sm dopant on structural, optical and efficient visible light photocatalytic performance of CdS nanoparticles by using simple wet chemical route
10. Facile synthesis of N-doped carbon dots/g-C3N4 photocatalyst with enhanced visible-light photocatalytic activity for the degradation of indomethacin10.1016/j.apcatb.2017.02.024 ↗
11. Decoration of carbon dots over hydrogen peroxide treated graphitic carbon nitride: exceptional photocatalytic performance in removal of different contaminants under visible light10.1016/j.jphotochem.2019.02.002 ↗
12. A facile hydrothermal synthesis of carbon dots modified g-C3N4 for enhanced photocatalytic H2-evolution performance10.1039/C7DT00773F ↗
13. Constructing a direct Z-scheme La2NiO4/g-C3N4 hybrid photocatalyst with boosted visible light photocatalytic activity10.1016/j.seppur.2018.02.004 ↗
14. Designing a 0D/2D S-scheme heterojunction over polymeric carbon nitride for visible-light photocatalytic inactivation of bacteria10.1002/anie.201916012 ↗
15. Rational construction of direct Z-scheme LaMnO3/g-C3N4 hybrid for improved visible-light photocatalytic tetracycline degradation10.1016/j.seppur.2018.10.062 ↗
16. 2D/2D g-C3N4/MnO2 nanocomposite as a direct Z-Scheme photocatalyst for enhanced photocatalytic activity10.1021/acssuschemeng.7b03289 ↗
17. Graphite carbon nitride nanosheets decorated with ZIF-8 nanoparticles: effects of the preparation method and their special hybrid structures on the photocatalytic performance10.1016/j.jallcom.2018.05.170 ↗
18. Fabrication of novel ZnO/MnWO4 nanocomposites with p-n heterojunction: visible-light-induced photocatalysts with substantially improved activity and durability10.1016/j.jmst.2018.01.014 ↗
19. Review on fabrication of graphitic carbon nitride based efficient nanocomposites for photodegradation of aqueous phase organic pollutants10.1016/j.jiec.2018.07.007 ↗
20. Synergetic activation of peroxymonosulfate by Co3O4 modified g-C3N4 for enhanced degradation of diclofenac sodium under visible light irradiation10.1016/j.apcatb.2017.07.016 ↗
21. Ni-P cluster modified carbon nitride toward efficient photocatalytic hydrogen production10.1016/S1872-2067(19)63343-7 ↗
22. 2D MOFs enriched g-C3N4 nanosheets for highly efficient charge separation and photocatalytic hydrogen evolution from water10.1016/j.ijhydene.2018.12.036 ↗
23. Defect-assisted surface modification enhances the visible light photocatalytic performance of g-C3N4@C-TiO2 direct Z-scheme heterojunctions10.1016/S1872-2067(18)63183-3 ↗
24. In situ construction of hierarchical WO3/g-C3N4 composite hollow microspheres as a Z-scheme photocatalyst for the degradation of antibiotics10.1016/j.apcatb.2017.08.070 ↗
25. A direct Z-scheme g-C3N4/SnS2 photocatalyst with superior visible-light CO2 reduction performance10.1016/j.jcat.2017.06.006 ↗
26. Synthesis of Fe3O4/g-C3N4 nanocomposites and their application in the photodegradation of 2,4,6-trichlorophenol under visible light10.1016/j.matlet.2015.10.130 ↗
27. Improved visible-light activities for degrading pollutants on TiO2/g-C3N4 nanocomposites by decorating SPR Au nanoparticles and 2,4-dichlorophenol decomposition path10.1016/j.jhazmat.2017.09.005 ↗
28. Preparation of Ag2O/g-C3N4/Fe3O4 composites and the application in the photocatalytic degradation of Rhodamine B under visible light10.1016/j.jallcom.2017.03.095 ↗
29. Structure modulation, band structure, density of states and luminescent properties of columbitetype ZnNb2O610.1039/C5CE01828E ↗
30. Microstructure, phase evolution and interfacial effects in a new Zn0.9Mg0.1TiO3-ZnNb2O6 ceramic system with greatly induced improvement in microwave dielectric properties10.1016/j.scriptamat.2017.11.025 ↗
31. Investigation of the phase transformation and its effects on the microwave performance in 3ZnO-Nb2O5-GeO2 system10.1016/j.jallcom.2018.04.175 ↗
32. Optimizing the performance of photocatalytic H2 generation for ZnNb2O6 synthesized by a two-step hydrothermal method10.1039/C8RA01624K ↗
33. Constructing nitrogen doped graphene quantum dots-ZnNb2O6/g-C3N4 catalysts for hydrogen production under visible light10.1016/j.apcatb.2017.01.070 ↗
34. Low temperature synthesis of nanosized ZnNb2O6 photocatalysts by a citrate complex method10.1007/s10971-011-2661-y ↗
35. Synthesis and luminescent properties of ZnNb2O6 nanocrystals for solar cell10.1016/j.matlet.2010.08.053 ↗
36. Molten salt synthesis of ZnNb2O6 powder10.1016/j.materresbull.2007.02.005 ↗
37. Preparation of PAN-based electrospun nanofiber webs containing Ni-ZnO as high performance visible light photocatalyst10.1007/s12221-016-6731-1 ↗
38. An ultratrace assay of arsenite based on the synergistic quenching effect of Ru(bpy)32+ and arsenite on the electrochemiluminescence of Au–g-C3N4 nanosheets10.1039/C8CC08353C ↗
39. Surface nonpolarization of g-C3N4 by decoration with sensitized quantum dots for improved CO2 photoreduction10.1002/cssc.201802065 ↗
40. Facile urea-assisted precursor pre-treatment to fabricate porous g-C3N4 nanosheets for remarkably enhanced visible-light-driven hydrogen evolution10.1016/j.jcis.2018.07.108 ↗
41. C-S bond induced ultrafine SnS2 dot/porous g-C3N4 sheet 0D/2D heterojunction: synthesis and photocatalytic mechanism investigation10.1039/C7DT03894A ↗
42. Fabrication of novel magnetically separable visible-light-driven photocatalysts through photosensitization of Fe3O4/ZnO with CuWO410.1016/j.jiec.2016.08.028 ↗
43. Efficient Fe3O4-C3N4-Ag2MoO4 ternary photocatalyst: synthesis, outstanding light harvesting, and superior hydroxyl radical productivity for boosted photocatalytic performance10.1016/j.apcata.2018.09.018 ↗
44. Fabrication of a novel few-layer WS2/Bi2MoO6 plate-on-plate heterojunction structure with enhanced visible-light photocatalytic activity10.1039/C8DT02109K ↗
45. Novel Bi12TiO20/g-C3N4 composite with enhanced photocatalytic performance through Z-scheme mechanism10.1007/s10853-018-2311-7 ↗
46. Magnetically separable ternary g-C3N4/Fe3O4/BiOI nanocomposites: novel visible-light-driven photocatalysts based on graphitic carbon nitride10.1016/j.jcis.2015.11.057 ↗