Construction of Au/TiO2 Heterojunction with high photocatalytic performances under UVA illumination
Source abstract
Abstract
Abstract Anatase TiO2 nanoparticles (NPs) were successfully prepared through a hydrothermal approach, and Au NPs at various Au (0.1–2 wt%) contents were photodeposited onto the TiO2 NPs surface. The photocatalytic efficiency for the Au/TiO2 NPs for resorcinol photodegradation throughout UVA illumination was assessed. The TEM images and XPS findings indicated that the Au NPs are highly distributed onto TiO2 surface in the metallic state. The 0.1%Au/TiO2 NPs exhibited the highest photocatalytic efficiency of about 95.34%; however, 72.36% is given by pure TiO2 NPs. It was found that the photodegradation rate of 0.1% Au/TiO2 NPs exhibited 1.5 times of magnitude higher than pure TiO2 NPs. 0.1%Au/TiO2 NPs was considered to be the outstanding photoactive due to the ultimate efficient charge-carriers separation through charge transfer between Au and TiO2 NPs. The Au NPs sizes, its dispersity on TiO2 surface and surface plasmon resonance (SPR) were believed the critical factors for the higher photocatalytic performance of 0.1% Au/TiO2 NPs. The prepared photocatalysts are found to be the promising materials for toxic organic compounds remediation and solar conversion.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · TiO2 Photocatalysis and Solar Cells · Advanced Nanomaterials in Catalysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (50)
Show source-provided references
1. Mesoporous titania photocatalysts: preparation, characterization and reaction mechanisms10.1039/c1jm10407a ↗
2. Sol-gel synthesis of titania-silica photocatalyst for cyanide photodegradation10.1016/j.jphotochem.2004.01.017 ↗
3. Mesoporous TiO2 nanocrystals as efficient photocatalysts: impact of calcination temperatures and phase transformations on photocatalytic performances10.1016/j.cej.2014.11.075 ↗
4. Titanium dioxide photocatalysis10.1016/S1389-5567(00)00002-2 ↗
5. Photodegradation of herbicide imazapyr over mesoporous In2O3-TiO2 nanocomposites with enhanced photonic efficiency10.1016/j.seppur.2018.05.013 ↗
6. Visible-light photocatalysis in nitrogen-doped titanium oxides10.1126/science.1061051 ↗
7. Degradation of methyl orange by composite photocatalysts nano-TiO2 immobilized on activated carbons of different porosities10.1016/j.jhazmat.2009.04.058 ↗
8. P25-Graphene composite as a high performance photocatalyst10.1021/nn901221k ↗
9. TiO2/HZSM-5 nanocomposite photocatalyst: HCl treatment of NaZSM-5 promotes photocatalytic degradation of methyl orange10.1016/j.cej.2010.07.042 ↗
10. A metal- free dye sensitized titania mesoporous films for visible-light indoor air oxidation10.1002/cssc.201000158 ↗
11. Developing a cost-effective synthesis of iron oxide doped titania photocatalysts loaded with palladium, platinum or silver nanoparticles10.1016/j.cej.2012.01.105 ↗
12. Daylight photocatalysis by carbon-modified titanium dioxide10.1002/anie.200351577 ↗
13. Photocatalysis on TiO2 surfaces: principles, mechanisms, and selected results10.1021/cr00035a013 ↗
14. Improved photocatalytic activity of gold decorated differently doped TiO2 nanoparticles: a comparative study10.1016/j.chemosphere.2015.10.060 ↗
15. Gold nanoparticles on mesoporous interparticle networks of titanium dioxide nanocrystals for enhanced photonic efficiencies10.1021/jp900766g ↗
16. Mesoporous PdO-TiO2 nanocomposites with enhanced photocatalytic activity10.1016/j.apcatb.2012.01.006 ↗
17. Solar hydrogen generation by a CdS-Au-TiO2 sandwich nanorod array enhanced with Au nanoparticle as electron relay and plasmonic photosensitizer10.1021/ja503508g ↗
18. Enhanced full-spectrum water splitting by confining plasmonic Au nanoparticles in N-doped TiO2 bowl nanoarrays10.1016/j.nanoen.2016.04.013 ↗
19. Nanoplasmonics for chemistry10.1039/c3cs60364d ↗
20. Steering charge kinetics in photocatalysis: intersection of materials syntheses, characterization techniques and theoretical simulations10.1039/C5CS00064E ↗
21. Photodeposition of precious metals onto mesoporous TiO2 nanocrystals with enhanced their photocatalytic activity for methanol oxidation10.1016/j.cattod.2012.09.027 ↗
22. Ammonia-modified graphene sheets decorated with magnetic Fe3O4 nanoparticles for the photocatalytic and photo-Fenton degradation of phenolic compounds under sunlight irradiation10.1016/j.jhazmat.2016.11.023 ↗
23. T. transfer property over BiOI-loaded ZnO composites10.1016/j.jcis.2017.01.064 ↗
24. Mechanism of phenol photodegradation in the presence of pure and modified-TiO2: a review10.1016/j.watres.2012.07.048 ↗
25. Photocatalytic activity of mont-La (6%)-Cu0.6Cd0.4S catalyst for phenol degradation under near UV visible light irradiation10.1016/j.apcatb.2017.03.074 ↗
26. Switching oxygen reduction pathway by exfoliating graphitic carbon nitride for enhanced photocatalytic phenol degradation10.1021/acs.jpclett.5b00149 ↗
27. Single step peroxidase extraction and oxidation of highly concentrated ethanol and phenol aqueous solutions using supercritical carbon dioxide10.1016/j.supflu.2016.05.021 ↗
28. Research on degradation product and reaction kinetics of membrane electro-bioreactor (MEBR) with catalytic electrodes for high concentration phenol wastewater treatment10.1016/j.chemosphere.2016.03.140 ↗
29. Room-temperature fabrication of bismuth oxybromide/oxyiodide photocatalyst and efficient degradation of phenolic pollutants under visible light10.1016/j.jhazmat.2018.06.044 ↗
30. Impact of calcination of hydrothermally synthesized TiO2 nanowires on their photocatalytic efficiency10.1016/j.molstruc.2019.127153 ↗
31. Effect of charge trapping species of cupric ions on the photocatalytic oxidation of resorcinol10.1016/j.apcatb.2004.08.004 ↗
32. Review on photocatalytic conversion of carbon dioxide to value-added compounds and renewable fuels by graphitic carbon nitride-based photocatalysts10.1080/01614940.2019.1654224 ↗
33. Magnetically separable nanocomposites based on ZnO and their applications in photocatalytic processes: a review10.1080/10643389.2018.1487227 ↗
34. Graphitic carbon nitride-based photocatalysts: toward efficient organic transformation for value-added chemicals production10.1016/j.mcat.2020.110902 ↗
35. Highly photocatalytic activity of nanocrystalline TiO2 (anatase, rutile) powders prepared from TiCl4 by sol-gel method in aqueous solutions10.1016/j.psep.2017.09.006 ↗
36. Highly hydrophilic poly (vinylidene fluoride)/meso-titania hybrid mesoporous membrane for photocatalytic membrane reactor in water10.1038/srep19148 ↗
37. Bioinspired synthesis of photocatalytic nanocomposite membranes based on synergy of Au-TiO2 and polydopamine for degradation of tetracycline under visible light10.1021/acsami.7b04902 ↗
38. The Scherrer equation versus the 'Debye-Scherrer equation10.1038/nnano.2011.145 ↗
39. The effect of gold loading and particle size on photocatalytic hydrogen production from ethanol over Au/TiO2 nanoparticles10.1038/nchem.1048 ↗
40. Electrical and optical properties of TiO2 anatase thin films10.1063/1.356306 ↗
41. Environmental applications of semiconductor photocatalysis10.1021/cr00033a004 ↗
42. All-solid-state Z-scheme in CdS-Au-TiO2 three-component nanojunction system10.1038/nmat1734 ↗
43. Fermi level equilibration in quantum dot-metal nanojunctions10.1021/jp011576t ↗
44. Charge distribution between UV-irradiated TiO2 and gold nanoparticles: Determination of shift in the Fermi Level10.1021/nl0340071 ↗
45. Enhanced photocatalytic hydrogen production activities of Au-loaded ZnS flowers10.1021/am302726y ↗
46. Size-dependence of Fermi energy of gold nanoparticles loaded on titanium (iv) dioxide at photostationary state10.1039/b809681c ↗
47. Size-and support-dependency in the catalysis of gold10.1016/S0920-5861(96)00208-8 ↗
48. Enhanced photocatalytic activity for H2 evolution under irradiation of UV–Vis Light by Au-modified nitrogen-doped TiO210.1371/journal.pone.0103671 ↗
49. Synthesis and characterization of nitrogen-doped TiO2 nanophotocatalyst with high visible light activity10.1021/jp0685030 ↗
50. Synergetic effects of nitrogen doping and Au loading on enhancing the visible-light photocatalytic activity of nano-TiO210.1016/j.catcom.2008.12.029 ↗