Oxygen vacancy-rich mesoporous ZrO2 with remarkably enhanced visible-light photocatalytic performance

Zhang, Jingji; Gao, Yueyi; Jia, Xuanrui; Wang, Jiangying; Chen, Zhi; Xu, Yanhua

doi:10.1016/j.solmat.2018.03.023

Cited by 97 publications

(26 citation statements)

References 49 publications

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“…Furthermore, Zr‐MOF can easily lose its lattice oxygen atoms, forming oxygen vacancies with trapped electrons when it is treated in an inert atmosphere at relatively low temperature such as 200 °C. [ 30–32 ] The reducibility of Zr‐MOF makes it act as an electron donor and plays an important role in the redox reaction.…”

Section: Introductionmentioning

confidence: 99%

Confined Heteropoly Blues in Defected Zr‐MOF (Bottle Around Ship) for High‐Efficiency Oxidative Desulfurization

Xue

Yang

Qiao

et al. 2020

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The Keggin-type polyoxometalates (POMs) are effective catalysts for oxidative desulfurization (ODS) and confining these POMs in metal-organic frameworks (MOFs) is a promising strategy to improve their performances. Herein, postsynthetic modification of POMs confined in MOFs by adding thiourea creates more unsaturated metal sites as defects, promoting ODS catalytic activity. Additional modification by confining 1-butyl-3-methyl imidazolium POMs in MOFs is performed to obtain higher ODS activity, owing to the affinity between electron-rich thiophene-based compounds and electrophilic imidazolium compounds. The ODS catalytic activities of fourZr-MOF-based composites (bottle around ship) including phosphomolybdate acid (PMA)/UiO-66, [Bmim] 3 PMo 12 O 40 /UiO-66, PMA/Thiourea/UiO-66, and [Bmim] 3 PMo 12 O 40 /Thiourea/UiO-66 are therefore investigated in detail.In order to explore the catalytic mechanism of these MOF composites, their microstructures and electronic structures are probed by various techniques such as X-ray diffraction, thermogravimetric analysis, Fourier transform infrared, Raman, scanning electron microscope, transmission electron microscope, BET, X-ray photoelectron spectroscopy, EPR, UV-vis, NMR spectra, and H 2 -temperature-programmed reduction. The results reveal that phosphomolybdate blues and imidazolium phosphomolybdate blues with different Mo 5+ /Mo 6+ ratios with the Keggin structure are confined in defected UiO-66 for all four composites. This approach can be applied to design and synthesize other POMs/MOFs composites as efficient catalysts.

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Section: Introductionmentioning

confidence: 99%

Confined Heteropoly Blues in Defected Zr‐MOF (Bottle Around Ship) for High‐Efficiency Oxidative Desulfurization

Xue

Yang

Qiao

et al. 2020

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104

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“…Two Ti 2 p peaks centered at 457.6 and 458.2 eV were assigned to Ti 3+ and Ti 4+ , respectively . Three O 1 s peaks at 529.3, 530, and 531.7 eV appeared to be related to lattice oxygen (O 2− )/(

V_{O}^{\times}

V_{O}^{\cdot}

, and

V_{O}^{\cdot \cdot}

, respectively . During sintering,

V_{O}^{\cdot}

V_{O}^{\cdot \cdot}

are generated to compensate for Ti 3+ ,

{Ti}_{normalTi} \to {Ti}_{{Ti}^{4 +}}^{(3 +)'} + V_{normalO}^{\cdot},

{Ti}_{normalTi} \to {Ti}_{{Ti}^{4 +}}^{(3 +)'} + \frac{1}{2} V_{normalO}^{\cdot \cdot} .

…”

Section: Resultsmentioning

confidence: 99%

Role of oxygen‐vacancy in piezoelectric properties and fatigue behavior of (Bi_0.5Na_0.5)_0.93Ba_0.07Ti_1+xO₃ ceramics

et al. 2019

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In this reported study, (Bi0.5Na0.5)0.93Ba0.07Ti1+xO3 (abbreviated as BNBT1+x) ceramics, containing Ti‐nonstoichiometry that ranged from a 2% deficiency to a 1% excess, were designed and systematically characterized. The results of the X‐ray diffraction Rietveld refinement and X‐ray photoelectron spectroscopy analysis of these materials revealed that the amount of Ti in the BNBT1+x ceramics significantly affected the degree of coexistent rhombohedral/tetragonal phases and also affected the content of singly/doubly charged oxygen‐vacancy (VO·/VO··) in the ceramics. After poling and 105 fatigue cycles, the variation in Raman resonance line‐width of the Ti–O bond in the BNBT1+x ceramics was found to be strongly dependent on the amount of Ti in the ceramic. The TiTi4+(3+)′-VO·→TiTi4+false(3+false)′-VO·· transformation and clustering of the TiTi4+false(3+false)′-VO·· defects under electrical loading were considered to be a critical factor in electric field‐induced structural transition and fatigue properties of the material.

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“… Strategies Catalysts and concentration Light source Antibiotic and concentration Degradation efficiency Ref. Vacancies BiOCl with abundant oxygen vacancies 0.5 g/L 300-W Xe lamp (λ > 420 nm) Tetracycline hydrochloride 10 mg/L Approximately 87% optimum within 2 h [51] Vacancies Oxygen vacancy-rich mesoporous ZrO 2 1 g/L 300-W Xe lamp (λ > 420 nm) Tetracycline hydrochloride 40 mg/L Approximately 80% optimum within 150 h [52] Vacancies BiOBr microspheres with oxygen vacancies 1 g/L 10-W LED lamp (0.4 mW‧cm −2 ) Tetracycline (TC) 20 mg/L Approximately 94% optimum within 90 min [53] Vacancies ZnWO 4-x nanorods with oxygen vacancy 0.2 g/L Hg lamp 300-W UV or 300-W Xe lamp (UV–Vis-NIR) Tetracycline 20 mg/L Approximately 91% optimum within 90 min [54] Vacancies Bi 2 MoO 6 with oxygen vacancy 0.4 g/L 300-W Xe lamp (λ > 400 nm) Ciprofloxacin 20 mg/L Approximately 55% optimum within 120 min [55] Doping Carbon-doped g-C 3 N 4 0.5 g/L Sunlight Tetracycline 20 mg/L Approximately 90% optimum within 90 min [56] Doping P-O co-doped g-C 3 N 4 1 g/L 350-W Xe lamp (λ>420 nm) Enrofloxacin10 mg/L Approximately 90% within 80 min [57] Doping I and K co-doped g-C 3 N 4 2 g/L 300-W Xe lamp (λ>420 nm) Sulfamethoxazole 10 mg/L Approximately 99% optimum within 45 min [58] …”

Section: Strategies For Photocatalytic Activity Improvementmentioning

confidence: 99%

“…For example, mesoporous ZrO 2 containing abundant oxygen vacancies was successfully synthesized by Zhang et al . [52] via a template-less solvothermal approach, following calcination. The absorption edge of the obtained sample was extended into the visible range, and the modified surface characteristics promoted adsorption ability towards organic compounds, leading to an enhancement of the visible-light-driven photodegradation of organic contaminants.…”

Section: Strategies For Photocatalytic Activity Improvementmentioning

confidence: 99%

Recent advances in photodegradation of antibiotic residues in water

Yang

Chen

Zhao

et al. 2021

Chemical Engineering Journal

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Oxygen vacancy-rich mesoporous ZrO2 with remarkably enhanced visible-light photocatalytic performance

Cited by 97 publications

References 49 publications

Confined Heteropoly Blues in Defected Zr‐MOF (Bottle Around Ship) for High‐Efficiency Oxidative Desulfurization

Confined Heteropoly Blues in Defected Zr‐MOF (Bottle Around Ship) for High‐Efficiency Oxidative Desulfurization

Role of oxygen‐vacancy in piezoelectric properties and fatigue behavior of (Bi_0.5Na_0.5)_0.93Ba_0.07Ti_1+xO₃ ceramics

Recent advances in photodegradation of antibiotic residues in water

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Oxygen vacancy-rich mesoporous ZrO2 with remarkably enhanced visible-light photocatalytic performance

Cited by 97 publications

References 49 publications

Confined Heteropoly Blues in Defected Zr‐MOF (Bottle Around Ship) for High‐Efficiency Oxidative Desulfurization

Confined Heteropoly Blues in Defected Zr‐MOF (Bottle Around Ship) for High‐Efficiency Oxidative Desulfurization

Role of oxygen‐vacancy in piezoelectric properties and fatigue behavior of (Bi0.5Na0.5)0.93Ba0.07Ti1+xO3 ceramics

Recent advances in photodegradation of antibiotic residues in water

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Role of oxygen‐vacancy in piezoelectric properties and fatigue behavior of (Bi_0.5Na_0.5)_0.93Ba_0.07Ti_1+xO₃ ceramics