Synthesis and mechanistic insights of SiO2@WO3@Fe3O4 as a Novel Supported Photocatalyst for Wastewater Remediation under Visible Light
Source abstract
Abstract
A new optimized photocatalyst for wastewater remediation at neutral pH has been developed and fully characterized. The catalyst features microparticles of SiO2 as a supporting substrate and a uniform shell of WO3 nanoparticles externally decorated with Fe3O4 nanocrystals. The photocatalytic activity of SiO2@WO3@Fe3O4 was evaluated and compared to its SiO2@WO3 counterpart on the photodegradation of methylene blue (MB) under visible light, with and without H2O2. Best results were obtained for SiO2@WO3@Fe3O4 in the presence of H2O2, whose potential for wastewater remediation was further evaluated on the photodegradation and mineralization of a contaminant of emerging concern such as diclofenac (DCF). Furthermore, a photocatalytic mechanism was proposed based on the performed electron paramagnetic resonance (EPR) experiments, which provided evidence for the intermediates generated in all the involved photocatalytic processes. Hence it was proven that .OH is the species responsible for the photocatalyzed oxidation of MB and DCF. The generation of .OH is boosted by a synergistic effect between Fe3O4 and WO3 in the presence of light and H2O2.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Gas Sensing Nanomaterials and Sensors · Advanced oxidation water treatment
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (61)
Show source-provided references
1. Water Scarcity and Wastewater Reuse Standards in Southern Europe: Focus on Agriculture10.1007/s11270-017-3425-2 ↗
2. Powdered activated carbon full-scale addition to the activated sludge reactor of a municipal wastewater treatment plant: Pharmaceutical compounds control and overall impact on the process
3. Diclofenac and its transformation products: Environmental occurrence and toxicity - A review10.1016/j.envint.2016.09.014 ↗
4. Photo-Fenton Degradation of Diclofenac: Identification of Main Intermediates and Degradation Pathway10.1021/es050794n ↗
5. Toxic effects of the non-steroidal anti-inflammatory drug diclofenac10.1016/j.aquatox.2004.03.014 ↗
6. Pharmaceuticals of Emerging Concern in Aquatic Systems: Chemistry, Occurrence, Effects, and Removal Methods10.1021/acs.chemrev.8b00299 ↗
7. The impact of semiconductors on the concepts of electrochemistry10.1016/0013-4686(90)87067-C ↗
8. Photocatalysis with solar energy at a pilot-plant scale: an overview10.1016/S0926-3373(01)00315-0 ↗
9. Photocatalytic degradation for environmental applications - a review10.1002/jctb.532 ↗
10. Photocatalytic degradation of organic pollutants using TiO2-based photocatalysts: A review10.1016/j.jclepro.2020.121725 ↗
11. Solar light induced photocatalytic degradation of Reactive Blue 220 (RB-220) dye with highly efficient Ag@TiO2 core–shell nanoparticles: A comparison with UV photocatalysis10.1016/j.solener.2013.10.032 ↗
12. Exploring the effect of BN and B-N bridges on the photocatalytic performance of semiconductor heterojunctions: Enhancing carrier transfer mechanism
13. Facile and controlled synthesis of aligned WO3 nanorods and nanosheets as an efficient photocatalyst material10.1016/j.saa.2016.11.044 ↗
14. Characterizations of Nb-doped WO3 nanomaterials and their enhanced photocatalytic performance10.1039/C4RA04080E ↗
15. A review on the development of visible light-responsive WO3-based photocatalysts for environmental applications10.1016/j.ceja.2020.100070 ↗
16. Robust charge carrier by Fe3O4 in Fe3O4/WO3 core-shell photocatalyst loaded on UiO-66(Ti) for urea photo-oxidation10.1016/j.chemosphere.2020.129206 ↗
17. The effect of selected reaction parameters on the photoproduction of oxygen and hydrogen from a WO3–Fe2+–Fe3+ aqueous suspension10.1016/S1010-6030(99)00026-X ↗
18. Novel WO3/Fe3O4 magnetic photocatalysts: Preparation, characterization and thiacloprid photodegradation10.1016/j.jiec.2018.10.025 ↗
19. An overview on WO3 based photocatalyst for environmental remediation10.1016/j.jece.2020.105018 ↗
20. Magnetic WO3/Fe3O4 as catalyst for deep oxidative desulfurization of model oil10.1016/j.mseb.2019.01.009 ↗
21. Synthesis of magnetic core@dual shell Fe3O4 @ SiO2 @ WO3 nanocatalysts for olefin double bond oxidative cleavage10.1002/cjce.23931 ↗
22. Spray dried TiO2/WO3 heterostructure for photocatalytic applications with residual activity in the dark10.1016/j.apcatb.2017.12.049 ↗
23. Ag and Fe 3 O4 Comodified WO3 –x Nanocomposites for Catalytic Photothermal Degradation of Pharmaceuticals and Personal Care Products10.1021/acsanm.0c03261 ↗
24. Photocatalytic activity of WO3/Fe2O3 nanocomposite photoanode10.1016/j.ijhydene.2015.05.016 ↗
25. Effect of Fe3+ as an electron-transfer mediator on WO3-induced activation of peroxymonosulfate under visible light10.1016/j.cej.2021.128529 ↗
26. Tungsten oxide-based visible light-driven photocatalysts: crystal and electronic structures and strategies for photocatalytic efficiency enhancement10.1039/C9QI01516G ↗
27. Properties, optimized morphologies, and advanced strategies for photocatalytic applications of WO3 based photocatalysts10.1016/j.jhazmat.2022.128218 ↗
28. Mesoporous WO3 photocatalyst for the partial oxidation of methane to methanol using electron scavengers10.1016/j.apcatb.2014.07.055 ↗
29. Fe3O4/WO3 Hierarchical Core-Shell Structure: High-Performance and Recyclable Visible-Light Photocatalysis10.1002/chem.201002229 ↗
30. Synergistically enhanced photocatalytic activity of graphitic carbon nitride and WO3 nanohybrids mediated by photo-Fenton reaction and H2O210.1016/j.apcatb.2017.01.038 ↗
31. A review of step-scheme photocatalysts
32. Photo-Fenton oxidation of phenol with magnetite as iron source10.1016/j.apcatb.2014.02.006 ↗
33. Mesoporous SiO2/BiVO4/CuO nanospheres for Z-scheme, visible light aerobic C–N coupling and dehydrogenation10.1016/j.apmt.2019.01.010 ↗
34. Controlled growth of monodisperse silica spheres in the micron size range10.1016/0021-9797(68)90272-5 ↗
35. Synthesis and characterization of magnetite nanoparticles via the chemical co-precipitation method10.1016/j.mseb.2012.01.003 ↗
36. Direct synthesis of Fe3O4 nanopowder by thermal decomposition of Fe–urea complex and its properties10.1016/j.jallcom.2010.11.145 ↗
37. Effect of Annealing on the Surface Morphology, Optical and and Structural Properties of Nanodimensional Tungsten Oxide Prepared by Coprecipitation Technique10.1007/s11664-018-06846-4 ↗
38. Boosting photocatalytic activity of WO3 nanorods with tailored surface oxygen vacancies for selective alcohol oxidations10.1016/j.apsusc.2018.08.181 ↗
39. On the quantitativeness of EDS STEM10.1016/j.ultramic.2014.11.029 ↗
40. Comparative study of photocatalytic activities of magnetically separable WO3/TiO2/Fe3O4 nanocomposites and TiO2, WO3/TiO2 and TiO2/Fe3O4 under visible light irradiation10.1016/j.spmi.2015.09.014 ↗
41. Photocatalytic hydrogen production using mesoporous TiO2 doped with Pt10.1016/j.apcatb.2017.04.029 ↗
42. Rational Band Gap Engineering of WO3 Photocatalyst for Visible light Water Splitting10.1002/cctc.201100446 ↗
43. Synthesis and characterization of WO3 polymorphs: monoclinic, orthorhombic and hexagonal structures10.1007/s10854-014-2053-5 ↗
44. Characterization of WO3 Thin Films Grown on Silicon by HFMOD10.1155/2013/591787 ↗
45. One-pot synthesis of WO3 structures at 95°C using HCl10.1007/s10971-014-3459-5 ↗
46. Characterization of Venezuelan laterites by X-ray photoelectron spectroscopy10.1016/S0368-2048(96)03035-6 ↗
47. Surface electronic structure and isomerization reactions of alkanes on some transition metal oxides10.1016/S0039-6028(96)01488-4 ↗
48. One-pot co-precipitation synthesis of Fe3O4 nanoparticles embedded in 3D carbonaceous matrix as anode for lithium ion batteries10.1007/s10853-018-3141-3 ↗
49. Characterization of sol-gel prepared WO3 thin films as a gas sensor10.1116/1.581698 ↗
50. Characterization of titanium dioxide photoactivity following the formation of radicals by EPR spectroscopy10.1163/156856707779238630 ↗
51. Spin Trapping: ESR parameters of spin adducts 1474 1528V10.1016/S0891-5849(87)80033-3 ↗
52. Electron spin resonance study of radicals formed during photo-oxidation of phenol on TiO210.1016/0927-7757(93)80312-3 ↗
53. Spin Trapping by 5,5-Dimethylpyrroline- N -oxide in Fenton Media in the Presence of Nafion Perfluorinated Membranes: Limitations and Potential10.1021/jp061042y ↗
54. Oxidation Kinetics of Fe(II) in a Eutrophic Swiss Lake10.1021/es980207g ↗
55. High-performance gas sensing achieved by mesoporous tungsten oxide mesocrystals with increased oxygen vacancies10.1039/c3ta11506b ↗
56. The preparation and characterization of La doped TiO2 nanoparticles and their photocatalytic activity10.1016/j.jssc.2004.05.064 ↗
57. Cationic and Anionic Surface Binding Sites on Nanocrystalline Zinc Oxide: Surface Influence on Photoluminescence and Photocatalysis10.1021/ja808663b ↗
58. Enhancement of photoluminescence emission and anomalous photoconductivity properties of Fe3O4 @SiO2 core–shell microspheres10.1039/C5RA03686K ↗
59. Standard electrode potentials involving radicals in aqueous solution: inorganic radicals
60. Radiation enhanced uptake of Hg0(g) on iron (oxyhydr)oxide nanoparticles10.1039/C7RA07401H ↗
61. Photocatalytic decomposition of water into H2 and O2 by a two-step photoexcitation reaction using a WO3 suspension catalyst and an Fe3+/Fe2+ redox system10.1016/S0009-2614(97)00903-2 ↗