Rutile Anatase Mixed

Review of the anatase to rutile phase transformation
2010year12month8day It is possible that electron transfer between rutile and a residual quantity of anatase may facilitate improved photo-oxidative reactions, as in mixed-phase titania
دردشة على الإنترنت
Band alignment of rutile and anatase TiO2
2013year7month7day Nature Materials - A convincing explanation of why mixed phases of anatase and rutile TiO2 outperform individual polymorphs is lacking. An energetic band alignment of ~0.4 eV is now shown to...
دردشة على الإنترنت
Titanium Dioxide (Anatase and Rutile): Surface
2014year9month25day TiO2 with Tunable Anatase-to-Rutile Nanoparticles Ratios: How Does the Photoactivity Depend on the Phase Composition and the Nature of Photocatalytic Reaction?. ACS Applied Nano Materials 2021, 4
دردشة على الإنترنت
A simple method for the synthesis of anatase-rutile mixed
2022year1month1day The transfer of electrons from rutile to a lower energy anatase electron trapping site during the photo excitation in mixed-phase TiO 2 catalysts reduce the
دردشة على الإنترنت
Stable Ti3+ Self-Doped Anatase-Rutile Mixed
2016year3month3day 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 the blue TiO 2 varying from
دردشة على الإنترنت
Phase evolution, morphological, optical and
2020year6month23day In this paper, we report the production of anatase/rutile mixed-phase and rutile TiO 2 nanoparticulate thin films from anatase and rutile TiO 2 target materials onto silica and indium...
دردشة على الإنترنت
Nature of Rutile Nuclei in Anatase-to-Rutile
2015year8month19day The rutile nuclei are thus not rutile phase but nascent metastable TiO 2-II phase in an anatase matrix. The phase transition kinetics is found to be sensitive to the compressive strain and the
دردشة على الإنترنت
Self-induced synthesis of phase-junction TiO2 with a tailored rutile
2016year2month11day The possible mixed-phase junctions between rutile and anatase included: rutile (101)/anatase (001) with the closest bonding arrangements and parameters 30;
دردشة على الإنترنت
Enhanced visible-light photocatalytic activity of
2020year1month15day In this work, mixed-phase P25 nano-size powder was heat-treated at temperatures, 700–900°C, at which temperatures the transformation proceeded to increase the rutile phase content, and the
دردشة على الإنترنت
Synthesis of anatase and rutile mixed phase titanium dioxide ...
2022year8month1day 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 step. Ethylene glycol and Ethanol were used as fuel for the combustion of titanium precursor. The prepared nanoparticles were subjected to UV–vis diffuse reflectance spectra, XRD, TEM ...
دردشة على الإنترنت
Enhanced visible-light photocatalytic activity of
2020year1month15day 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
دردشة على الإنترنت
Wetting Properties of Transparent Anatase/Rutile Mixed
2020year6month25day Polycrystalline rutile, mixed anatase/rutile and anatase ΤiO 2 films were obtained. Phase formation is significantly affected by the glancing angle of the substrate and the working pressure. The increase of glancing angle at constant pressure and the increase of the total working pressure at large glancing angle (75°) resulted in phase shift ...
دردشة على الإنترنت
Band Lineup and Charge Carrier Separation in Mixed Rutile-Anatase ...
2011year2month4day 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
دردشة على الإنترنت
How the Anatase-to-Rutile Ratio Influences the
2011year11month2day In 1991, Bickley et al. proposed a synergetic effect between anatase and rutile in Degussa P25. Since then, there has been an intensive debate about the correctness of this proposal, the origin of the synergism, and the right polymorph composition. However, a comparison of pure titanium dioxide samples with various anatase-to-rutile ratios, but
دردشة على الإنترنت
Hydrothermal synthesis of the novel rutile-mixed anatase
2016year8month31day In this paper, we introduce a process to synthesize a novel photocatalyst called rutile-mixed anatase nanosheets with dominant {001} facets from a hydrothermal route by using a solution mixed with Ti(OC 4 H 9) 4, HF, NH 4 F and H 2 O. The crystal structure, micrographs, chemical compositions, and photocatalytic property are
دردشة على الإنترنت
Phase evolution, morphological, optical and electrical
2020year6month23day 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 ...
دردشة على الإنترنت
Brookite vs. rutile vs. anatase: What`s behind their various ...
2022year6month1day The results of investigating the morphological, optical and electronic properties of three synthesized TiO 2 polymorphs (anatase (A and A2), brookite (B and B2) and rutile (R)) show that the origin of their different catalytic efficiency in the heterogeneous photocatalytic process lies in the depths of the charge carrier traps. The presence of
دردشة على الإنترنت
Enhanced visible-light photocatalytic activity of anatase-rutile mixed ...
2020year1month15day The work showed that the conduction band of rutile lies higher than that of anatase, and that electron transfer from rutile to anatase across the interface should be favourable. Optimum rutile/anatase ratio in mixed-phase TiO 2 for the photocatalytic performance cannot be determined unambiguously. In this work, photocatalytic
دردشة على الإنترنت
Preparation and properties of anatase - rutile mixed crystal
2023year12month1day 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 rutile type is 10–50 nm. The addition of Fe can effectively reduce the band gap width of TiO 2 from 3.22 eV to 2.33 eV, so as to expand the visible light absorption range.
دردشة على الإنترنت
Band Lineup and Charge Carrier Separation in Mixed Rutile-Anatase ...
2011year2month4day Mixed anatase/rutile TiO2 exhibits high photocatalytic activity; however, the mechanism underlying the high performance of the mixed phases is not fully understood. We have performed time-domain ...
دردشة على الإنترنت
Carbon-regulated titania crystallization to construct a
Capitalized on the concentration-regulated balance between the promotive and inhibitory effects of carbon doping on titania crystallization, we unveiled two structural criteria of the anatase phase – crystal size of about 14 nm and crystallinity of about 30% – for ART but also devised 125 titania samples of defined but varied anatase/rutile ...
دردشة على الإنترنت
A comparative study of the photocatalytic oxidation of
2007year10month1day Although usually electrons' transfer from anatase to rutile has been proposed, due to the more negative CB of anatase than that of rutile [83] [84] [85][86][87][88][89][90], some reports have ...
دردشة على الإنترنت
Facile Synthesis of Anatase–Rutile Diphase N-doped TiO
To further boost the charge separation and photocatalytic activity of TiO2 under visible light, the anatase–rutile mixed-phase nitrogen-doped (N-doped) TiO2 nanoparticles were successfully synthesized through a facile one-step calcining procedure using TiN as raw materials. The crystal phases, morphologies, chemical compositions, textural structures,
دردشة على الإنترنت
XRD patterns for rutile, anatase, and mixed TiO2 phases. The
XRD patterns of commercial titania show diffraction peaks attributed to the anatase (2θ ≈ 25 • ), rutile (2θ ≈ 28 • ), and mixed phases of TiO 2 , as reported by El-Desoky et al. [47 ...
دردشة على الإنترنت
Evidence of rutile-to-anatase photo-induced electron transfer in mixed ...
2015year7month22day With ethanol as a probe molecule, the surface sites of anatase and rutile can be distinguished using 13C CP/MAS NMR spectroscopy, which offers an opportunity to investigate the transfer of photo-induced electrons from rutile to anatase in
دردشة على الإنترنت
High-temperature solid-state rutile-to-anatase phase
2022year11month1day TiO 2 has many polymorphs, among which rutile is the most thermodynamically stable. Bulk anatase TiO 2 is usually a metastable phase at room temperature. Hence, phase transformation of bulk rutile TiO 2 to anatase TiO 2 by heat treatment is thermodynamically forbidden. However, the stability of TiO 2 polymorphs is
دردشة على الإنترنت
Quantum dynamics origin of high photocatalytic activity of mixed
2020year7month28day Mixed anatase/rutile TiO2 exhibits high photocatalytic activity; however, the mechanism underlying the high performance of the mixed phases is not fully understood.
دردشة على الإنترنت
Brookite vs. rutile vs. anatase: What`s behind their various ...
2022year4month1day The n-deethylation was improved using TiO2-350 (higher surface area) and chromophore cleavage appeared to improve when mixed anatase–rutile crystal-line phases of TiO2 were identified. For the ...
دردشة على الإنترنت
Optimum anatase/rutile ratios of TiO2 for photocatalytic ...
2023year11month15day Both ion exchange (IX) and reverse osmosis (RO) technologies are effective in removing NO3− from drinking water, but the disposal of waste streams and the large amount of salt needed for to prepare fresh brine in IX have become economic and environmental challenges. To overcome these barriers, photocatalytic denitrification (PD)
دردشة على الإنترنت