Pt-TiO 2 microspheres with exposed {001} facets for degradation of formaldehyde in air: Formation mechanism and enhanced visible light photocatalytic activity
Source abstract
Abstract
Abstract In this study, TiO 2 microspheres with exposed {001} facets were successfully synthesized by a low-temperature hydrothermal method without using any organic solvents as morphology controlling agent. Furthermore, an active Pt-TiO 2 catalyst was prepared by impregnation and deposition-precipitation methods with reduction processes. The photocatalytic activity of the samples was evaluated by degradation of formaldehyde in air under visible light irradiation at room temperature. After modification with Pt, the optical absorption property of the Pt-TiO 2 microspheres was extended to visible light range. More importantly, the Pt-TiO 2 microspheres exhibited excellent photocatalytic performance for formaldehyde degradation under visible light irradiation, being superior to pure TiO 2 microspheres and even Pt-P25. The formation mechanism of the TiO 2 microspheres with exposed {001} facets was studied. Moreover, the proper photocatalytic mechanism was also proposed. This work provided new insight into the improvement of photocatalytic activity by special high-energy facet exposing and noble metal depositing.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · TiO2 Photocatalysis and Solar Cells · Catalytic Processes in Materials Science
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (53)
Show source-provided references
1. Electrochemical photolysis of water at a semiconductor electrode10.1038/238037a0 ↗
2. The surface science of titanium dioxide10.1016/S0167-5729(02)00100-0 ↗
3. Series of MxWO3/ZnO (M=K, Rb, NH4) nanocomposites: combination of energy saving and environmental decontamination functions10.1016/j.apcatb.2016.08.030 ↗
4. Novel visible-light-driven Z-scheme Bi12GeO20/g-C3N4 photocatalyst: oxygen-induced pathway of organic pollutants degradation and proton assisted electron transfer mechanism of Cr(VI) reduction10.1016/j.apcatb.2017.02.014 ↗
5. Bi24Ga2O39 for visible light photocatalytic reduction of Cr(VI): controlled synthesis, facet-dependent activity and DFT study10.1016/j.cej.2016.12.090 ↗
6. Synthesis and facet-dependent enhanced photocatalytic activity of Bi2 SiO5/AgI nanoplate photocatalysts10.1039/C5TA03465E ↗
7. Visible-light-driven g-C3N4/Ti3+-TiO2 photocatalyst co-exposed {001} and {101} facets and its enhanced photocatalytic activities for organic pollutant degradation and Cr(VI) reduction10.1016/j.apsusc.2015.08.240 ↗
8. Anatase TiO2 single crystals with a large percentage of reactive facets10.1038/nature06964 ↗
9. Constructing hierarchical spheres from large ultrathin anatase TiO2 nanosheets with nearly 100% exposed (001) facets for fast reversible lithium storage10.1021/ja100102y ↗
10. Synthesis of titania nanosheets with a high percentage of exposed (001) facets and related photocatalytic properties10.1021/ja8092373 ↗
11. Enhanced photoactivity of oxygen-deficient anatase TiO2 sheets with dominant {001} facets10.1021/jp907749r ↗
12. Crystal faces of rutile and anatase TiO2 particles and their roles in photocatalytic reactions10.1039/b202140d ↗
13. Formation of new crystal faces on TiO2 particles by treatment with aqueous HF solution or hot sulfuric acid10.1039/b304518h ↗
14. Orientation dependence of charge-transfer processes on TiO2 (anatase) single crystals10.1149/1.1393379 ↗
15. Ultrasonic-assistant fabrication of cocoon-like Ag/AgFeO2 nanocatalyst with excellent plasmon enhanced visible-light photocatalytic activity10.1016/j.ultsonch.2017.01.010 ↗
16. Fabrication of AgFeO2/g-C3N4 nanocatalyst with enhanced and stable photocatalytic performance10.1016/j.apsusc.2016.06.023 ↗
17. Sepiolite nanofiber-supported platinum nanoparticle catalysts toward the catalytic oxidation of formaldehyde at ambient temperature efficient and stable performance and mechanism10.1016/j.cej.2015.11.077 ↗
18. Enhancement of photocatalytic activity by metal deposition characterizations and photonic efficiency of Pt, Au and Pd deposited on TiO2 catalyst10.1016/j.watres.2004.04.046 ↗
19. Core-shell Ag@Pt nanoparticles supported on sepiolite nanofibers for the catalytic reduction of nitrophenols in water: enhanced catalytic performance and DFT study10.1016/j.apcatb.2016.12.025 ↗
20. Crystal growth and design of a facile synthesized uniform single crystalline football-like anatase TiO2 microspheres with exposed {001} facets10.1016/j.apsusc.2014.05.029 ↗
21. Preparation of TiO2 anatase nanocrystals by TiCl4 hydrolysis with additive H2SO410.1371/journal.pone.0021082 ↗
22. First-principles thermochemistry for the production of TiO2 from TiCl410.1021/jp0661950 ↗
23. Controlling the morphology of TiO2, nanocrystals with different capping agents10.1016/j.bsecv.2015.07.001 ↗
24. Facile synthesis of TiO2 nanocrystals using NH4F as morphology-controlling agent and its influences on photocatalytic activity10.1166/jnn.2013.6719 ↗
25. Anatase TiO2 nanosheets with exposed (001) facets: improved photoelectric conversion efficiency in dye-sensitized solar cells10.1039/c0nr00427h ↗
26. High efficiency quantum dot heterojunction solar cell using anatase (001) TiO2 nanosheets10.1002/adma.201104497 ↗
27. Enhanced photocatalytic activity of Mo–{001} TiO2 core–shell nanoparticles under visible light10.1039/c0cc02034f ↗
28. TiO2 nanosheets with exposed {001} facets for photocatalytic applications10.1007/s12274-015-0919-3 ↗
29. Hierarchical flower-like nanostructures of anatase TiO2 nanosheets dominated by {001} facets10.1016/j.jallcom.2015.09.257 ↗
30. Hierarchical TiO2 nanospheres with Dominant {001} Facets Facile synthesis growth mechanism, and photocatalytic activity10.1002/chem.201103087 ↗
31. Titania single crystals with a curved surface10.1038/ncomms6355 ↗
32. Synthesis of anatase TiO2 with exposed {001}and {101} facets and photocatalytic activity
33. Electrochemical degradation of refractory pollutants using TiO2 single crystals exposed by high-energy {001} facets10.1016/j.watres.2014.08.030 ↗
34. Prediction of TiO2 nanoparticle phase and shape transitions controlled by surface chemistry10.1021/nl050355m ↗
35. Structure and energetics of water adsorbed at TiO2 anatase (101) and (001) surfaces10.1103/PhysRevLett.81.2954 ↗
36. Reactivity of anatase TiO2 nanoparticles: the role of the minority (001) surface10.1021/jp055311g ↗
37. Factors influencing surface morphology of anodized TiO2 nanotubes10.1016/j.electacta.2012.04.076 ↗
38. Investigation of phase transitions for the hydrothermal formation of TiO2 in the presence of F− ions10.1016/j.cej.2012.10.045 ↗
39. Effects of adsorbed F OH, and Cl ions on formaldehyde adsorption performance and mechanism of anatase TiO2 nanosheets with exposed {001} facets10.1021/am402246b ↗
40. Anatase TiO2 with dominant high-energy {001} facets synthesis properties, and applications10.1021/cm200597m ↗
41. Green synthesis of Pt-doped TiO2 nanocrystals with exposed (001) facets and mesoscopic void space for photo-splitting of water under solar irradiation10.1039/C5NR02097B ↗
42. Solvothermal synthesis and photoreactivity of anatase TiO2 nanosheets with dominant {001} facets10.1021/ja808790p ↗
43. Effect of reduction treatment on structural properties of TiO2 supported Pt nanoparticles and their catalytic activity for formaldehyde oxidation
44. Synthesis of Pt-loaded self-interspersed anatase TiO2 with a large fraction of (001) facets for efficient photocatalytic nitrobenzene degradation10.1021/acsami.5b06161 ↗
45. Enhanced performance of NaOH-modified Pt/TiO2 toward room temperature selective oxidation of formaldehyde10.1021/es3045949 ↗
46. Highly active mesoporous ferrihydrite supported pt catalyst for formaldehyde removal at room temperature10.1021/acs.est.5b00532 ↗
47. Advances in photocatalysis in China10.1016/S1872-2067(12)60548-8 ↗
48. Fourier transform ir evidence of the formation of dioxymethylene species from formaldehyde adsorption on anatase and thoria10.1039/c39850001006 ↗
49. Room-light-induced indoor air purification using an efficient Pt/N-TiO2 photocatalyst10.1016/j.apcatb.2011.08.017 ↗
50. Photocatalytic purification of indoor air from nitrogen oxide contaminants on modified TiO2-based catalysts10.1016/j.cattod.2011.08.005 ↗
51. Evidence for crystal-face-dependent TiO2 photocatalysis from single-molecule imaging and kinetic analysis10.1021/ja201415j ↗
52. Anatase TiO2 single crystals with exposed {001} and {110} facets: facile synthesis and enhanced photocatalysis10.1039/b924172h ↗
53. Active facets on titanium (III)-doped TiO2: An effective strategy to improve the visible-light photocatalytic activity10.1002/anie.201202191 ↗