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The coatings prepared on stainless steel showed greater than 3-log reduction in viable E coli after 4 hours visible light exposure. ... Nanostructured TiO2 anatase-rutile-carbon solid coating with ...
For instance, O 2 adsorption on anatase TiO 2 (101) 118, CO oxidation and CO 2 reduction on rutile TiO 2 (110) 75 have all been shown to be hindered by slow, non-adiabatic electron-transfer rates ...
Meanwhile, in the anatase structure, the oxidation process is limited, while in contrast to the rutile structure, the reduction process is limited. Thus, when it is TiO 2 with the mixed phase, the oxidation-reduction process can be accelerated . ... In another study, anatase/rutile (A/R) and interlayer amorphous (Am) ...
CO2 photoreduction with water vapor has been studied on three TiO2 nanocrystal polymorphs (anatase, rutile, and brookite) that were engineered with defect-free and oxygen-deficient surfaces, respectively. It was demonstrated that helium pretreatment of the as-prepared TiO2 at a moderate temperature resulted in the creation …
The flatband potential of anatase (the main component of P90) and rutile (the second main component of P90) equals 2.1 V vs. Li + /Li for both anatase and rutile. The S 8 reduction is triggered at the same potential, confirming that TiO 2 behaves like an ideally rectifying semiconductor electrode for sulfur. The modification of glass-fiber ...
Which has a higher surface reduction activity between anatase and rutile? The answer remains unknown so far in the literature. Anatase is metastable to …
It was noticed that the crystallite size stays in low values until the beginning of anatase‐to‐rutile phase formation and the peak narrowing is originated from the reduction of the lattice microstrain practically (Figure 4(a)). Thus, the crystallite coalescence occurs as a consequence of the destroying-rebuilt oxygen-metallic cation bonds ...
Selective Catalytic Reduction of NO Using Phase-Pure Anatase, Rutile, and Brookite TiO2 Nanocrystals. Inorganic Chemistry 2020, 59 (20), 15324-15334. https://doi/10.1021/acs.inorgchem.0c02304
The influence of titanium dioxide concentrations and the ratio of anatase-rutile polymorphs on NO x reduction was studied. The obtained results are shown in Figure 8. A significant improvement in the photocatalytic properties of samples modified with titanium dioxide in comparison to the control sample was noted.
Anatase (101) (VO)-b shows that Pt atoms are adsorbed on the topmost O 1C, but the nearest neighbor Ti 5C of O 1C has become Ti 4C similarly, compared with anatase (001)(V O)-b. Unlike the TiO2 surface of anatase, the Pt atom on the rutile surface is more likely adsorbed with Ti atoms with decreasing coordination numbers in Fig. 4.
The NRR activity of the eight facets can be unified into a single scaling line. The anatase TiO2 (101) and rutile TiO2 (101) surfaces were found to be the most and the second most active surfaces with a limiting potential of -0.91 V and -0.95 V respectively, suggesting that the TiO2 NRR activity is not very phase-sensitive. For photocatalytic ...
After applying the remaining two tiers, the previously tested rutile- and anatase-phases of TiO 2, cubic-phases of SrTiO 3, CeO 2, and NaTaO 3, the 2H-phase of MoSe 2 and WSe 2 and the zinc-blende ...
On the other hand, some theoretical simulations predict that the anatase phase is conversely more stable than the rutile phase for nanocrystals less than 14 nm in size 24,25,26,27, Because these ...
For example, the anatase TiO 2 supported Ni catalyst showed higher catalytic activity in p-nitrophenol hydrogenation as compared to rutile TiO 2 supported Ni catalyst due to the ease of reduction ...
Photocatalytic CO 2 reduction is an excellent green chemistry technology for directly converting CO 2 by natural sunlight into fuels such as CO, CH 4, CH 3 OH, ... The yield takes the order brookite > anatase > rutile; the enhancement was ascribed to the formation of oxygen vacancies and Ti 3+ on the surface of brookite: CO: 2.8:
Visible light responsive titania-based nanostructures for photocatalytic reduction of carbon dioxide. Abu Taleb Miah, in Nanomaterials for CO2 Capture, Storage, Conversion and Utilization, 2021. 11.2.1 Role of crystalline phases. Anatase, among the three naturally occurring phases of nanocrystalline TiO 2 (anatase, rutile and brookite), is the most …
The main objective of this research is to compare the results of the addition of anatase, rutile, and a mixture of rutile and anatase to lightweight concrete, and their …
explained only for the case of the rutile surface.4 On the other hand, for the mixed phase, it is well-known that electrons transfer from the rutile to the anatase part,8 but •OH formation is increased with H 2 O 2. Therefore, reaction 1 would be inconsistent. Previously we considered only the reduction process.4
Ru/TiO 2 catalysts exhibit excellent catalytic performance for selective reduction of 4-nitroacetophenone to 4-aminoacetophenone at normal temperature and atmospheric hydrogen pressure. Moreover, 99.9% selectivity to 4-aminoacetophenone can be obtained over 2.7 wt% Ru/TiO 2 (anatase) catalyst even in a relatively wide temperature (55–115 …
On the theoretical side, He et al. reported the CO 2 − anion is one of the important species on the charged anatase (101) surface, and the reduction of CO 2 into HCOOH or CO mainly it takes 2e ...
with different contents of anatase and rutile have been success-fully prepared in an acidic hydrothermal system by Li et al.22 Tartaric acid (C 4H 6O 6) was employed as the phase …
For the understanding of the activity of TiO2 photocatalysts, knowledge of the activities of different crystal facets is necessary. This information can be achieved by the investigation of well-defined single-crystalline TiO2 surfaces. In this study, the photocatalytic activity of different anatase, brookite, and rutile single-crystal wafers with only one …
Among different TiO 2 polymorphs, anatase has been way more studied than rutile in photocatalytic CO 2 reduction. In the present work, the catalytic activity of anatase and P25-TiO 2 (mixture between anatase and rutile phases) has been evaluated in gas-phase CO 2 photoreduction. The interfacial heterojunction between anatase and rutile in …
Titanium dioxide (TiO 2) is one of the most popular photocatalysts.In fact, based on an analysis with SciFinder of the American Chemical Society, 45% of documents concerning photocatalysis in the last two years deal with TiO 2.There are two major polymorphs for TiO 2: anatase and rutile with the band gap energy of 3.2 and 3.0 eV, …
In general, anatase TiO2 exhibits higher photocatalytic activities than rutile TiO2. However, the reasons for the differences in photocatalytic activity between anatase and rutile are still being debated. In this work, the band structure, density of states, and effective mass of photogenerated charg …
Anatase to rutile phase transformation is initiated at low temperature under the influence of pre-existing rutile. The materialization and amalgamation of new rutile …
This has given the anatase an edge towards photocatalytic reduction of nitroarenes over rutile TiO 2. The other factors like adsorption of the reactants and the …
