Enhancing the photoresponse and photocatalytic properties of TiO2 by controllably tuning defects across {101} facets
Source abstract
Abstract
Abstract Introducing defects into semiconductors with well-controlled exposed facets offers an effective route for the development of photocatalytic materials with greatly improved properties. Here, we report a facile ethylene glycol reduction procedure to make anatase titanium dioxide (TiO2) with different concentrations of exposed {001} and {101} facets, leading to different surficial defects. TiO2 with increased concentrations of {101} facets shows a 5-fold improvement in photocurrent generation as well as improved photocatalytic activity towards water splitting under visible light irradiation. The improved activity is ascribed to the oxygen vacancies as well as the variable surface chemical states, which collectively induce a slower recombination rate of photo-induced electron-hole pairs. This work also highlights a feasible strategy to obtain the defective TiO2 and explore the synergistic effect of surface defects and different concentrations of exposed {001} and {101} facets for photocurrent and photocatalytic properties under visible light irradiation.
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 (29)
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1. Increasing solar absorption for photocatalysis with black hydrogenated titanium dioxide nanocrystals10.1126/science.1200448 ↗
2. Enhanced photocatalytic CO2-reduction activity of anatase TiO2 by coexposed {001} and {101} facets10.1021/ja5044787 ↗
3. Effective nonmetal incorporation in black titania with enhanced solar energy utilization10.1039/c3ee42708k ↗
4. Enhanced visible light photocatalytic water reduction from a g-C3N4/SrTa2O6 heterojunction10.1016/j.apcatb.2017.05.092 ↗
5. Core-shell nanostructured black rutile titania as excellent catalyst for hydrogen production enhanced by sulfur doping10.1021/ja4076748 ↗
6. Nitrogen-doped mesoporous carbon of extraordinary capacitance for electrochemical energy storage10.1126/science.aab3798 ↗
7. Direct growth of TiO2 nanosheet arrays on carbon fibers for highly efficient photocatalytic degradation of methyl orange10.1002/adma.201201075 ↗
8. Controlled preparation of porous TiO2-Ag nanostructures through supramolecular assembly for plasmon-enhanced photocatalysis10.1002/adma.201404007 ↗
9. Anisotropic Growth of TiO2 onto Gold Nanorods for Plasmon-Enhanced Hydrogen Production from Water Reduction10.1021/jacs.5b11341 ↗
10. Effect of nature and location of defects on bandgap narrowing in black TiO2 nanoparticles10.1021/ja3012676 ↗
11. In situ surface hydrogenation synthesis of Ti3+ self-doped TiO2 with enhanced visible light photoactivity10.1039/C4NR00972J ↗
12. Photogenerated defects in shape-controlled TiO2 anatase nanocrystals: a probe to evaluate the role of crystal facets in photocatalytic processes10.1021/ja204838s ↗
13. Chemical environment control and enhanced catalytic performance of platinum nanoparticles embedded in nanocrystalline metal-organic frameworks10.1021/jacs.5b03540 ↗
14. N, S co-doped graphene quantum dots-graphene-TiO2 nanotubes composite with enhanced photocatalytic activity10.1016/j.jallcom.2016.08.261 ↗
15. One-step synthesis of band-tunable N, S co-doped commercial TiO2/graphene quantum dots composites with enhanced photocatalytic activity10.1039/C7RA01856H ↗
16. Effective electrons transfer pathway of the ternary TiO2/RGO/Ag nanocomposite with enhanced photocatalytic activity under visible light10.3390/catal7050156 ↗
17. Morphology-dependent defect structures and photocatalytic performance of hydrogenated anatase TiO2 nanocrystals10.1016/j.jcat.2016.06.016 ↗
18. Methanol conversion into dimethyl ether on the anatase TiO2 (001) surface10.1002/anie.201509021 ↗
19. A facile method to improve the photocatalytic and lithium-ion rechargeable battery performance of TiO2 nanocrystals10.1002/aenm.201300294 ↗
20. Black anatase titania enabling ultra high cycling rates for rechargeable lithium batteries10.1039/c3ee41960f ↗
21. Visible-light photocatalytic, solar thermal and photoelectrochemical properties of aluminium-reduced black titania10.1039/c3ee41817k ↗
22. Electrochemically hydrogenated TiO2 nanotubes with improved photoelectrochemical water splitting performance10.1186/1556-276X-8-391 ↗
23. Construction of the ternary hybrid of CdS nanoparticles loaded on mesoporous-TiO2/RGO for enhancement of photocatalytic activity10.1039/C6RA16094H ↗
24. Hydrogen production by photocatalytic water splitting over Pt/TiO2 nanosheets with exposed (001) facets10.1021/jp104488b ↗
25. Study on the shape control and photocatalytic activity of high-energy anatase titania10.1016/j.apcatb.2010.08.014 ↗
26. Enhancement of photoexcited charge transfer by {001} facet-dominating TiO2 nanoparticles10.1021/jz2011622 ↗
27. Structures and properties of titania thin films annealed under different atmosphere10.1016/j.tsf.2011.08.094 ↗
28. Architecture, optical absorption, and photocurrent response of oxygen-deficient mixed-phase titania nanostructures10.1016/j.actamat.2012.08.030 ↗
29. Surface reconstruction-Induced site-specific charge separation and photocatalytic reaction on anatase TiO2 (001) surface10.1021/acs.jpcc.7b02154 ↗