Blue Ti<sup>3+</sup> self-doped TiO<sub>2</sub> nanosheets with rich {001} facets for photocatalytic performance

Zhen, Deshuai; Gao, Chan; Yang, De; Zhu, Xingqi; Grimes, Craig A.; Liu, Yu; Cai, Qingyun

doi:10.1039/c8nj06371k

Cited by 7 publications

(3 citation statements)

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“…Hence, Ti 3+ self-doped TiO 2 nanomaterials have been widely investigated for their extended visible light absorption and high conductivity [29,30]. Inducting Ti 3+ and OVs would create new defect states below the conduction band of TiO 2 , thus increasing its PC activity [31][32][33][34] . Thus far, various strategies for introducing Ti 3+ are often used; examples are thermal annealing at a high temperature in various reducing atmospheres, such as H 2 , CO, H 2 /Ar, or vacuum [35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Construction of Spindle-Shaped Ti3+ Self-Doped TiO2 Photocatalysts Using Triethanolamine-Aqueous as the Medium and Its Photoelectrochemical Properties

Gong

Wang

et al. 2022

Nanomaterials

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To enhance the utilization efficiency of visible light and reduce the recombination of photogenerated electrons and holes, spindle-shaped TiO2 photocatalysts with different Ti3+ concentrations were fabricated by a simple solvothermal strategy using low-cost, environmentally friendly TiH2 and H2O2 as raw materials and triethanolamine-aqueous as the medium. The photocatalytic activities of the obtained photocatalysts were investigated in the presence of visible light. X-ray diffraction (XRD), Raman spectra, transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FT-IR) spectra were applied to characterize the structure, morphologies, and chemical compositions of as-fabricated Ti3+ self-doped TiO2. The concentration of triethanolamine in the mixed solvent plays a significant role on the crystallinity, morphologies, and photocatalytic activities. The electron–hole separation efficiency was found to increase with the increase in the aspect ratio of as-fabricated Ti3+ self-doped TiO2, which was proved by transient photocurrent response and electrochemical impedance spectroscopy.

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Section: Introductionmentioning

confidence: 99%

Construction of Spindle-Shaped Ti3+ Self-Doped TiO2 Photocatalysts Using Triethanolamine-Aqueous as the Medium and Its Photoelectrochemical Properties

Gong

Wang

et al. 2022

Nanomaterials

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“…It may act as an intermedium for transferring NIR light energy to UV-Vis light that can be absorbed by the TiO2 nanoparticles to produce oxidative holes (h + ) and reductive electrons (e − ). Effective e − -h + pairs are able to react with O2, OH, and H2O in a mixed solution to generate various reactive species that are helpful for sterilization [22,23]. For instance, β-NaYF4:Yb,Er nanomaterial has been widely used in biological imaging analysis and photocatalytic applications.…”

Section: Introductionmentioning

confidence: 99%

Using Gd-Enhanced β-NaYF4:Yb,Er Fluorescent Nanorods Coupled to Reduced TiO2 for the NIR-Triggered Photocatalytic Inactivation of Escherichia coli

Zhou

2021

Catalysts

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β-NaYF4:Yb,Er,Gd fluorescent nanorods were successfully coupled to a reduced TiO2 (UCNPs@R-TiO2) nanocomposite and applied to visible-light catalytic sterilization under 980 nm near-infrared (NIR) light illumination. The UCNPs (β-NaYF4:Yb,Er,Gd) absorb the NIR light and emit red and green light. The visible light can be absorbed by the R-TiO2 (Eg = 2.8 eV) for the photocatalytic reaction. About 98.1% of Escherichia coli were effectively killed upon 12 min of NIR light irradiation at a minimum inhibitory concentration (MIC) of 40 μg/mL UCNPs@R-TiO2 nanocomposite. The bactericidal properties were further evaluated by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) analysis. We found that the high bactericidal activity was due to the synergistic effect between the UCNPs and R-TiO2. Moreover, the UCNPs show excellent upconversion luminance properties, and the introduction of visible-light-absorbed R-TiO2 nanoparticles (2.8 eV) was conducive to the efficient separation and utilization of photogenerated electron-hole pairs.

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“…Thus, designing Ti 3+ doping with highly reactive facets is used as a common strategy to optimize the photoreactivity of TiO 2 . For example, Cai et al 29 prepared Ti 3+ -doped TiO 2 nanosheets with 26.4% of {001} facets, which exhibited enhanced photocatalytic degradation efficiency of rhodamine-B compared with that of nondoped ones. Li et al 30 prepared oxygen-deficient blue TiO 2 nanocrystals with coexposed {101}−{001} facets to enhance the performance of visible light-induced CO 2 photoreduction.…”

Section: ■ Introductionmentioning

confidence: 99%

True Photoreactivity Origin of Ti³⁺-Doped Anatase TiO₂ Crystals with Respectively Dominated Exposed {001}, {101}, and {100} Facets

Liu

2019

ACS Omega

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Combining the advantages of reactive crystal facets and engineering defects is an encouraging way to address the inherent disadvantages of titanium dioxide (TiO2) nanocrystals. However, revealing the true photoreactivity origin for defective TiO2 with coexposed or predominant exposed anisotropic facets is still highly challenging. Here, the photoreactivity of TiO2 nanocrystals with respectively predominant exposed {001}, {101}, and {100} facets before and after Ti3+ doping under both ultraviolet and visible light was compared systematically. In detail, the photocatalytic H2 production for R-TiO2-001, R-TiO2-101, and R-TiO2-100 increased by a factor of 1.34, 2.65, and 3.39 under UV light and a factor of 8.90, 13.47, and 8.72 under visible light. By contrast, the photocatalytic degradation of methyl orange for R-TiO2-001, R-TiO2-101, and R-TiO2-100 increased by a factor of 3.18, 1.42, and 2.17 under UV light and a factor of 4.03, 2.85, and 1.58 under visible light, respectively. The true photocatalytic activity origin for the obtained photoreduction and photo-oxidation ability is attributed to the exposure of more active sites (under-coordinated 5-fold Ti atoms), the facilitated charge transfer among {001}, {101}, and {100} facets, and the Ti3+ energy state with variable doping levels to extend the visible light response. This work hopefully provides significant insights into the photoreactivity origin of defective TiO2 nanocrystals with anisotropic exposed facets.

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Blue Ti³⁺ self-doped TiO₂ nanosheets with rich {001} facets for photocatalytic performance

Abstract: The as-prepared BT1.5TNs exhibits superior photocatalytic performance for RhB degradation due to Ti3+ doping.

Cited by 7 publications

References 53 publications

Construction of Spindle-Shaped Ti3+ Self-Doped TiO2 Photocatalysts Using Triethanolamine-Aqueous as the Medium and Its Photoelectrochemical Properties

Construction of Spindle-Shaped Ti3+ Self-Doped TiO2 Photocatalysts Using Triethanolamine-Aqueous as the Medium and Its Photoelectrochemical Properties

Using Gd-Enhanced β-NaYF4:Yb,Er Fluorescent Nanorods Coupled to Reduced TiO2 for the NIR-Triggered Photocatalytic Inactivation of Escherichia coli

True Photoreactivity Origin of Ti³⁺-Doped Anatase TiO₂ Crystals with Respectively Dominated Exposed {001}, {101}, and {100} Facets

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Blue Ti3+ self-doped TiO2 nanosheets with rich {001} facets for photocatalytic performance

Abstract: The as-prepared BT1.5TNs exhibits superior photocatalytic performance for RhB degradation due to Ti3+ doping.

Cited by 7 publications

References 53 publications

Construction of Spindle-Shaped Ti3+ Self-Doped TiO2 Photocatalysts Using Triethanolamine-Aqueous as the Medium and Its Photoelectrochemical Properties

Construction of Spindle-Shaped Ti3+ Self-Doped TiO2 Photocatalysts Using Triethanolamine-Aqueous as the Medium and Its Photoelectrochemical Properties

Using Gd-Enhanced β-NaYF4:Yb,Er Fluorescent Nanorods Coupled to Reduced TiO2 for the NIR-Triggered Photocatalytic Inactivation of Escherichia coli

True Photoreactivity Origin of Ti3+-Doped Anatase TiO2 Crystals with Respectively Dominated Exposed {001}, {101}, and {100} Facets

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Blue Ti³⁺ self-doped TiO₂ nanosheets with rich {001} facets for photocatalytic performance

True Photoreactivity Origin of Ti³⁺-Doped Anatase TiO₂ Crystals with Respectively Dominated Exposed {001}, {101}, and {100} Facets