Fabrication of highly active Melem/Zn0.25Cd0.75S composites for the degradation of bisphenol A and methyl orange under visible light irradiation
Source abstract
Abstract
Metal-free polymeric catalyst hold great promise owing to their abundant sources, low-cost fabrication and easy processibility. Melem, an important intermediate during condensation of melamine rings to graphitic carbon nitride (g-C3N4), was synthesized by simple solid phase polymerization process. A novel Melem/Zn0.25Cd0.75S composite was fabricated through a facile one-step hydrothermal method. The as-products were characterized by X-ray diffraction (XRD), UV–vis DRS spectroscopy, fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM). The TEM and HRTEM results reveal that Zn0.25Cd0.75S nanoparticles and Melem closely contact with each other to form an intimate interface. The as-prepared composites exhibit significantly enhanced visible light photocatalytic performance for the degradation of Methyl orange (MO) and Bisphenol A (BPA), which could be attributed to the effective photo-induced charges transfer and separation in Melem/Zn0.25Cd0.75S composites. On the basis of radical scavenger experiments, superoxide radicals and holes are suggested to play a critical role in MO degradation over Melem/Zn0.25Cd0.75S heterojunctions. A possible mechanism for charge separation and transfer in the Melem/Zn0.25Cd0.75S composites was proposed to explain the enhanced photocatalytic performance.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Copper-based nanomaterials and applications · TiO2 Photocatalysis and Solar Cells
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (35)
Show source-provided references
1. Recent developments in photocatalytic water treatment technology: a review10.1016/j.watres.2010.02.039 ↗
2. Decontamination and disinfection of water by solar photocatalysis: recent overview and trends10.1016/j.cattod.2009.06.018 ↗
3. Adsorptive remediation of environmental pollutants using novel graphene-based nanomaterials10.1016/j.cej.2013.04.070 ↗
4. Photocatalysis on TiO2 surfaces: principles, mechanisms, and selected results10.1021/cr00035a013 ↗
5. Highly photoactive, low bandgap TiO2 nanoparticles wrapped by graphene10.1002/adma.201104110 ↗
6. Mass production and high photocatalytic activity of ZnS nanoporous nanoparticles10.1002/ange.200462057 ↗
7. From Single ZnO multipods to heterostructured ZnO/ZnS, ZnO/ZnSe, ZnO/Bi2S3 and ZnO/Cu2S multipods: controlled synthesis and tunable optical and photoelectrochemical properties10.1039/c001615b ↗
8. Template-free synthesis of nanostructured CdxZn1-xS with tunable band structure for H2 Production and organic dye degradation using solar light10.1021/es3045955 ↗
9. Influence of Zn concentration in the activity of Cd1-xZnxS solid solutions for water splitting under visible light10.1016/j.cattod.2008.09.024 ↗
10. Enhanced photocatalytic hydrogen evolution under visible light over Cd1-xZnxS solid solution with cubic zinc blend phase10.1016/j.ijhydene.2009.10.084 ↗
11. Fabrication and photocatalytic performance of a ZnxCd1-xS solid solution prepared by sulfuration of a single layered double hydroxide precursor10.1016/j.apcatb.2010.11.036 ↗
12. High-efficient degradation of dyes by ZnxCd1-xS solid solutions under visible light irradiation10.1021/jp8049075 ↗
13. Novel approach to enhance photosensitized degradation of rhodamine B under visible light irradiation by the ZnxCd1-xS/TiO2 nanocomposites10.1021/es103041f ↗
14. A metal-free polymeric photocatalyst for hydrogen production from water under visible light10.1038/nmat2317 ↗
15. Low-molecular-weight carbon nitrides for solar hydrogen evolution10.1021/ja511802c ↗
16. An amorphous carbon nitride photocatalyst with greatly extended visible-light-responsive range for photocatalytic hydrogen generation10.1002/adma.201501939 ↗
17. New light on an old story: formation of melam during thermal condensation of melamine10.1002/chem.200601291 ↗
18. Melamine-melem adduct phases: investigating the thermal condensation of melamine10.1002/chem.200901518 ↗
19. Tri-s-triazines(s-heptazines) −from a mystery molecule to industrially relevant carbon nitride materials10.1016/j.ccr.2012.12.006 ↗
20. 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 ↗
21. Metal-free melem/g-C3N4 hybrid photocatalysts for water treatment10.1016/j.jcis.2015.11.003 ↗
22. Melem: a metal-free unit for photocatalytic hydrogen evolution10.1016/j.ijhydene.2014.02.052 ↗
23. Novel visible-light driven g-C3N4/Zn0.25Cd0.75S composite photocatalyst for efficient degradation of dyes and reduction of Cr(VI) in water10.1039/C4RA01439A ↗
24. Formation of a hydrogen-bonded heptazine framework by self-assembly of melem into a hexagonal channel structure10.1002/chem.201103527 ↗
25. Fabrication of ternary zinc cadmium sulfide photocatalysts with highly visible-light photocatalytic activity10.1016/j.catcom.2009.11.007 ↗
26. Graphene-based nanoarchitectures anchoring semiconductor and metal nanoparticles on a two-dimensional carbon support10.1021/jz900265j ↗
27. Ionothermal synthesis of crystalline, condensed, graphitic carbon nitride10.1002/chem.200800190 ↗
28. Efficient degradation of toxic organic pollutants with Ni2O3/TiO2-xBx under visible irradiation10.1021/ja0396753 ↗
29. Preparation of multi-walled carbon nanotubes/Cd0.8Zn0.2S nanocomposite and its photocatalytic hydrogen production under visible-light10.1016/j.ijhydene.2011.10.030 ↗
30. Chemical etching preparation of BiOI/BiOBr heterostructures with enhanced photocatalytic properties for organic dye removal10.1016/j.cej.2012.01.035 ↗
31. Visible light photocatalytic activity enhancement and mechanism of AgBr/Ag3PO4 hybrids for degradation of methyl orange10.1016/j.jhazmat.2012.03.002 ↗
32. The influence of fluoride on the physicochemical properties of anodic oxide films formed on titanium surfaces10.1021/la703258e ↗
33. Synthesis of a carbon nitride structure for visible-light catalysis by copolymerization10.1002/anie.200903886 ↗
34. Synergism of oxygen vacancy and carbonaceous species on enhanced photocatalytic activity of electrospun ZnO-carbon nanofibers: charge carrier scavengers mechanism10.1016/j.apcata.2013.06.024 ↗
35. Blue luminescence of ZnO nanoparticles based on nonequilibrium process: defect origins and emission controls10.1002/adfm.200901884 ↗