Neutron beam interaction with rutile TiO2 single crystal (1 1 1): Raman and XPS study on Ti3+-oxygen vacancy formation

Abdullah, Shahrir; Sahdan, Mohd Zainizan; Nayan, Nafarizal; Embong, Zaidi; Hak, Cik Rohaida Che; Adriyanto, Feri

doi:10.1016/j.matlet.2019.127143

Cited by 129 publications

(54 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, in the case of TiO 2 -GQDs caterpillar hybrids, along with Ti2p 3/2 (458.4 eV) and Ti2p 1/2 (464.1 eV) binding energies peaks, two new binding energy peaks at 457.7 eV and 463.4 eV are observed associated with Ti 3+ valence states. The binding energy different (Δ) between (Ti 4+ 2p 1/2 –Ti 4+ 2p 3/2 ) and (Ti 3+ 2p 1/2 –Ti 3+ 2p 3/2 ) is 5.7 eV, which is similar to the report by previous study [ 44 ]. This unambiguously demonstrates the formation of Ti 3+ valence states caused by oxygen vacancy during the process of ultrasound.…”

Section: Resultssupporting

confidence: 90%

Graphene Quantum Dots Improved “Caterpillar”-like TiO2 for Highly Efficient Photocatalytic Hydrogen Production

Chu

Guo

et al. 2021

Materials

View full text Add to dashboard Cite

Photocatalytic water splitting for hydrogen production via heterojunction provides a convenient approach to solve the world crises of energy supply. Herein, graphene quantum dots modified TiO2 hybrids (TiO2-GQDs) with a “caterpillar”-like structure exhibit stronger light absorption in the visible region and an enhanced hydrogen production capacity of about 3.5-fold compared to the pristine TiO2 caterpillar. These results inferred that the addition of GQDs drastically promotes the interfacial electron transfer from GQDs to TiO2 through C-O-Ti bonds via the bonding between oxygen vacancy sites in TiO2 and in-plane oxygen functional groups in GQDs. Using a “caterpillar”-like structure are expected to provide a new platform for the development of highly efficient solar-driven water splitting systems based on nanocomposite photocatalyst.

show abstract

Section: Resultssupporting

confidence: 90%

Graphene Quantum Dots Improved “Caterpillar”-like TiO2 for Highly Efficient Photocatalytic Hydrogen Production

Chu

Guo

et al. 2021

Materials

View full text Add to dashboard Cite

show abstract

“…Figure S7a 12,32−34 As can be seen from Figure 4e, the O 1s peak located at 530.01 and 529.91 eV is assigned to the Ti−O−Ti bond for lattice oxygen (L O ), while peak at 532.53 eV is assigned to Ti−OH bond for chemisorbed oxygen (C O ). 32,35,36 The peak at 531.43 eV can be attributed to the V O for absorbed oxygen ions on the TiO 2 surface. 36,37 The peak area percentage of the V O peak of TiO 2 /Chl (17.44%) is higher than that of pristine TiO 2 (16.69%), which demonstrates the existence of more surface V O of TiO 2 /Chl for absorbing more oxygen.…”

Section: Resultsmentioning

confidence: 99%

“…32,35,36 The peak at 531.43 eV can be attributed to the V O for absorbed oxygen ions on the TiO 2 surface. 36,37 The peak area percentage of the V O peak of TiO 2 /Chl (17.44%) is higher than that of pristine TiO 2 (16.69%), which demonstrates the existence of more surface V O of TiO 2 /Chl for absorbing more oxygen. This is consistent with Figure S6 results.…”

Section: Resultsmentioning

confidence: 99%

TiO₂/Chlorophyll S-Scheme Composite Photocatalyst with Improved Photocatalytic Bactericidal Performance

Pan

Dong

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Step-scheme (S-scheme) photocatalysts have been proposed for highly efficient charge separation and strong redox activity in the photocatalysis field. Here, we reported a facile strategy to obtain the S-scheme heterojunction composite TiO 2 / chlorophyll (Chl). The S-scheme heterojunction enables the significant improvement of electron transfer efficiency at the interfacial heterojunction of TiO 2 /Chl. Also, the lifted conduction band and valence band of TiO 2 /Chl resulted in more than 1.61 times generation of reactive oxidizing species, compared to that of bare TiO 2 . In addition, TiO 2 /Chl was applied as a photocatalytic bactericidal material to fabricate commercial masks for prolonged life span of the mask. The TiO 2 /Chl-coated mask filter exhibited excellent bactericidal effect on Escherichia coli under light illumination (2.94 × 10 7 cfu E. coli were killed by 1 cm −2 coated mask filters within illumination of 3 h), while commercial mask filters showed no bactericidal effect. After three circulation-sterilization tests, the TiO 2 /Chl-made mask filter maintained the initial bactericidal effect, which greatly extended the life span of the mask that presents a promising strategy to alleviate the supply stress of masks.

show abstract

“…Ti to O proportion is 0.42. More increased oxygen existence in TiO 2 films was expected after thermal annealing [44].…”

Section: Phase Structure and Microstructure Of Ti 3 O X Filmsmentioning

confidence: 93%

A Study on the Characteristic and Antibacterial Activity of Ti3Ox Thin Films

Widyastuti

Chiu

et al. 2021

Catalysts

View full text Add to dashboard Cite

A pure Ti target in Ar/O2 gas mixture was used to synthesize Ti3Ox thin film on a glass substrate by Reactive High-Power Impulse Magnetron Sputtering (HiPIMS) under different sputtering power (2 and 2.5 kW). The influence of HiPIMS parameters on thin films’ structural, morphological, chemical composition, optical and photocatalytic, and antibacterial properties was investigated. In this study, Ti3Ox thin films can be synthesized using the HiPIMS method without the post-annealing process. Two co-existence phases (hexagonal Ti3O and base-centered monoclinic Ti3O5 phases) existed on the Ti3Ox films. It is found that the peak intensity of (006) Ti3O hexagonal slightly increased as the sputtering power increased from 2 to 2.5 kW. The Ti3Ox thin-film bandgap values were 3.36 and 3.50 eV for 2 and 2.5 kW, respectively. The Ti3Ox films deposited at 2.5 kW showed good photocatalytic activity under UV light irradiation, with a higher methylene blue dye degradation rate than TiO2 thin films. The antibacterial study on Ti3Ox thin films exhibited a high inhibition percentage against E. coli and S. aureus. This study demonstrates that Ti3Ox thin films can promote high photocatalytic and antibacterial activity.

show abstract

Neutron beam interaction with rutile TiO2 single crystal (1 1 1): Raman and XPS study on Ti3+-oxygen vacancy formation

Cited by 129 publications

References 12 publications

Graphene Quantum Dots Improved “Caterpillar”-like TiO2 for Highly Efficient Photocatalytic Hydrogen Production

Graphene Quantum Dots Improved “Caterpillar”-like TiO2 for Highly Efficient Photocatalytic Hydrogen Production

TiO₂/Chlorophyll S-Scheme Composite Photocatalyst with Improved Photocatalytic Bactericidal Performance

A Study on the Characteristic and Antibacterial Activity of Ti3Ox Thin Films

Contact Info

Product

Resources

About

Neutron beam interaction with rutile TiO2 single crystal (1 1 1): Raman and XPS study on Ti3+-oxygen vacancy formation

Cited by 129 publications

References 12 publications

Graphene Quantum Dots Improved “Caterpillar”-like TiO2 for Highly Efficient Photocatalytic Hydrogen Production

Graphene Quantum Dots Improved “Caterpillar”-like TiO2 for Highly Efficient Photocatalytic Hydrogen Production

TiO2/Chlorophyll S-Scheme Composite Photocatalyst with Improved Photocatalytic Bactericidal Performance

A Study on the Characteristic and Antibacterial Activity of Ti3Ox Thin Films

Contact Info

Product

Resources

About

TiO₂/Chlorophyll S-Scheme Composite Photocatalyst with Improved Photocatalytic Bactericidal Performance