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2022年12月1日 Mixed-phase anatase/rutile TiO exhibits superior electrochemical performance due to a dual-phase interfacial storage mechanism by crystal phase transition. Download full-size image. Keywords. Metal-organic framework.
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2010年12月8日 The present work reviews the anatase to rutile phase transformation. The synthesis and properties of anatase and rutile are examined, followed by a discussion of
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2022年8月1日 In this present study, anatase and rutile mixed phase TiO 2 nanoparticles have been prepared by an eco-friendly simple solution combustion method in a single
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2013年7月7日 Nature Materials - A convincing explanation of why mixed phases of anatase and rutile TiO2 outperform individual polymorphs is
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2014年9月25日 TiO2 with Tunable Anatase-to-Rutile Nanoparticles Ratios: How Does the Photoactivity Depend on the Phase Composition and the
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2016年3月3日 Blue Ti 3+ self-doped TiO 2 nanoparticles with mixed phases of anatase and rutile have been synthesized via a facile solvothermal method. The phase evolution of
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2022年8月5日 In this paper, a comparative study about the photocatalytic performance of pure Anatase/Rutile mixed-phase Titania (AR-TiO 2) nanoparticles and their
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2023年12月1日 The results show that Fe-TiO 2 is a mixed crystal form of rutile type and anatase type, the average crystal diameter of anatase type is 11 nm, and the diameter of
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2010年8月13日 And anatase-dominated anatase/rutile mixed-phase TiO 2 nanotubes (ANTs) with superior photocatalytic performance were fabricated by decorating TiO 2 on
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2020年7月27日 Mixed anatase/rutile TiO 2 exhibits high photocatalytic activity; however, the mechanism underlying the high performance of the mixed phases is not fully
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2020年6月8日 Depending on the glancing angle and the pressure, rutile, mixed anatase/ rutile and pure anatase were deposited at low substrate temperature. Both hydrophilic and hydrophobic TiO2 were obtained,
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2019年2月13日 The TiO2 coating exhibits a rarely-reported microstructure comprising anatase and rutile in a composite with amorphous carbon. ... The proposed mechanism for enhanced PCA of mixed-phase TiO 2 is a ...
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Nowadays, rutile TiO 2 or anatase TiO 2 is prepared from titanium oxalate, but there are only few studies on the rutile/anatase TiO 2 mixed crystal. In this study, using potassium titanyl oxalate as the titanium source, titanium oxalate [Ti 2 O 3 (H 2 O) 2 (C 2 O 4)H 2 O] has been prepared by a one-step hydrothermal method at 120 °C. When the temperature
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2014年9月25日 Exploring Rutile (110) and Anatase (101) TiO2 Water Interfaces by Reactive Force-Field Simulations. The Journal of Physical Chemistry C 2017 , 121 (12) , 6701-6711.
خبير الاتصال2022年12月1日 The fourth factor is that the anatase/rutile mixed phase interface effect leads to charge separation at the boundary, providing additional good lithium storage sites, while enhancing the charge transfer kinetics and providing high-rate capability at the same time. Among them, the crystal phase transition caused by the temperature change is the ...
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2022年11月1日 Anatase TiO 2 (A-TiO 2) was obtained by annealing the synthesized rutile TiO 2 powder in a two-step thermal process under NH 3 flow and subsequently in air. R–TiO 2 was first heated under an NH 3 atmosphere to replace some of the oxygen atoms in the rutile lattice with N atoms. This process produced dramatic changes in the crystalline
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2014年2月10日 The prototypical photocatalyst TiO2 exists in different polymorphs, the most common forms are the anatase- and rutile-crystal structures. Generally, anatase is more active than rutile, but no ...
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2006年12月5日 The epitaxial growths of titanium dioxide (TiO 2) thin films were prepared by pulsed laser deposition.The dependencies of the crystalline structure of prepared films upon buffer O 2 gas pressure, laser power and substrate were studied. The crystalline structures were found by the X-ray diffraction method to be a mixture of rutile and
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2020年6月23日 A mixed-phase (anatase/rutile) TiO2 thin film was produced at a substrate temperature of 400 °C when samples are fabricated with anatase and rutile target materials. The results of this study ...
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2020年1月1日 TiO 2 possesses various phases including rutile, anatase, brookite, and TiO 2-B, among which rutile and anatase are the most widely investigated ones. ... Then, TiO 2 nanoparticles were uniformly mixed with Mg metal powders in different molar ratios prior to being sealed in a quartz tube and calcined at 450 °C for 10 h.
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2010年8月13日 Abstract Anatase-dominated anatase/rutile mixed-phase TiO2 nanotubes were prepared by decorating TiO2 on the hydrothermally synthesized TiO2-derived nanotubes via liquid phase deposition and subsequent annealing. The morphology and structure of as-prepared TiO2 nanotubes were characterized by transmission electron
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2020年10月1日 It is found that the rutile percentage is only 12.48% in T2, while it is 89.65% in T5. The sample T3 contains 82% anatase and 18% rutile. The percentages of anatase and rutile are nearly comparable to the 80:20 ratio of anatase/rutile in Degussa P25, a commercial mixed anatase-rutile TiO 2 nanopowder reported to show high photoactivity
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2023年9月19日 Anatase and rutile exhibit strong Raman scattering in the 100 cm −1 to 900 cm −1 spectral region [17–20]; in table 1, the major Raman bands in this region are reported.Figures 1(a) and (b) show Raman spectra of pure anatase and rutile, acquired on specimens employed in this study after sample preparation as illustrated in section 2.3,
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2019年11月29日 TiO 2 samples with different ratios of anatase/rutile phases were synthesized via a microwave assisted sol–gel method and by applying particular concentrations of titanium(IV) isopropoxide as a single source precursor (SSP) with a constant concentration of nitric acid, which was used as the structure directing agent.The
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Calculations by the HSE06 functional for rutile and anatase crystals reproduce the observed width of the valence and conduction bands, as well as of the gap. From the band structures the branching point energies are obtained as reference for both phases, allowing us to deduce a generic band alignment scheme without a specific interface model. The results
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2020年1月15日 Optimum rutile/anatase ratio in mixed-phase TiO 2 for the photocatalytic performance cannot be determined unambiguously. In this work, photocatalytic performance was enhanced to reach an optimum heating temperature, approximately 800°C, and deteriorated by higher-temperature heat treatment.
خبير الاتصالIn this experiment, Mn@TiO 2 nanofibers in the form of membranes were fabricated by ordinary electrospinning and a higher temperature calcination process. Field-emission scanning, X-ray diffraction analysis, X-ray photoelectron spectroscopy, Raman spectra, UV-visible diffuse spectra, UV-visible spectroscopy, and Brunauer–Emmett–Teller (BET)
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2020年7月27日 Mixed anatase/rutile TiO 2 exhibits high photocatalytic activity; however, the mechanism underlying the high performance of the mixed phases is not fully understood. We have performed time-domain ab initio calculations to study the exited state dynamics in mixed phase TiO 2 and to investigate the impact of an oxygen vacancy on the dynamics.
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2017年1月5日 Cake-like anatase/rutile mixed phase TiO 2 (A/R TiO 2) was successfully prepared through pyrolyzation of metal-organic frameworks MIL-125.Its morphology, structure and photocatalytic performance for degradation of nitrobenzene under UV light irradiation were investigated by scanning electron microscopy, transmission electron
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2021年10月15日 X-ray diffraction and Raman spectroscopy confirmed the rutile–anatase mixed-phase TiO 2 photocatalysts. The role of Ag doping was also investigated in the phase transformation of mixed-phase TiO 2 nanoparticles. Further, the effect of mixed-phase and Ag doping on photocatalytic activity was also investigated.
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