High-energy ball-milling of Al2O3-13wt%TiO2 and Al2O3-44wt%TiO2 powders have been studied and more precisely the effect of the addition of a …
C3N4/TiO2 hybrid photocatalysts with highly enhanced photocatalytic performance were prepared by a facile ball milling method. A layered structure of g-C3N4 was formed on the surface of TiO2. The mechanochemical process can promote the dispersion of C3N4 on the surface of TiO2 particles, to form a single lay
TiO 2 –CeO 2 photocatalysts were synthesized by a high energy ball milling process at different milling speed and their photocatalytic activities were evaluated by measuring degradation efficiency of methyl orange. Phases, crystal size, microstrain, and morphology were evaluated. The results have demonstrated that the milling reduces the average crystallite size …
In this work, TiO2 nanoparticles were successfully synthesized with narrow size distribution via a wet ball milling sol-gel method. The effect of calcination temperature on photocatalytic activity was observed from particle size, crystallite size, and phase transition of TiO2 nanoparticles. Increasing calcination temperature increased particle size, crystallite size, and the crystallinity …
The preparation of N/TiO 2 photocatalyst was carried out in a ball mill (QM-1SP2, Nanjing University Instrumental Company). The chemical reagent titanium dioxide was used as a raw material. Raw titanium dioxide (about 16.0 g) and NH 4 F (0.0200 mol, 0.740 g) were mixed in the ball mill tank (100 mL) with 10 mL of deionized water. Twelve agate ...
High-energy ball-milling initiates a solid state reaction in an equimolar mixture of TiO2 and ZrO2. The first stage of ball-milling induced the transformation of anatase TiO2 to high-pressure phase TiO2 (II), isostructural with ZrTiO4. The formation of solid-solutions monoclinic ZrO2/TiO2 and TiO2 (II)/ZrO2 was observed in intermediate stage.
Titanium Aluminide based composites with Al2O3 reinforcement can be produced via reaction of Al with TiO2. These composites are considered as low price materials for high temperature applications. In this research, the effect of ball milling on 3TiO2/7Al system was investigated. On the basis of obtained results, ball milling for 0 to 60 h does not lead to reduction of TiO2 by …
The different size of TiO 2 powders were obtained by controlling the time of ball milling. It is expected that this work may be useful in the applications of TiO 2 filled PTFE composites in practice. 2. Experimental. 2.1. Materials. The raw materials used were rutile TiO 2 powder and PTFE aqueous dispersion (TE-3865C, Dupont, USA ...
The TiO 2 ceramic nanofibers used were synthesized via electrospinning by sol-gel process, then calcinated at a high temperature to evaporate the residual polymers. The fabricated nanocomposites contain 0, 1, 3 and 5 wt.% of synthesized ceramic nanofibers (TiO 2). Powder mixtures were mixed for 1 h via high-energy ball milling in a vacuum ...
Titanium dioxide (TiO2) is widely used for applications in heterogeneous photocatalysis. We prepared nanocrystalline powders of the anatase as well as the rutile modification by high-energy ball milling of the coarse grained source materials for up to 4 h. The resulting average grain size was about 20 nm. The morphology of the powders was investigated with transmission electron …
In order to facilitate TiO2(B)/C composites fabrication, the synthesized TiO2(B) particles were crushed into smaller sizes by ball milling. Ball mill treated TiO2(B) particles of less than 1.0 μm with a fraction of anatase phase, compared to as-synthesized ...
After the ball milling process of the TiO 2-C, the isotherms of the TiO 2-C300 and TiO 2-C500 samples remain almost unchanged, and also the pore size distribution curve showed only a small decrease in the pore region between 10 and 40 nm, causing a pore volume decreasing from 0.28 to 0.26 cm 3 g −1, as shown in Figs. 8a, 9a, and Table 2.
into smaller sizes after 1 hr ball milling (Figure1(b)). However, they became severely agglomerated after ball milling for 3 hrs as can be seen in Figure 1(c). The size Figure 1 SEM images for planetary-milled TiO2(B) powders with 300 rpm and various milling times. (a) as-prepared TiO 2(B), (b) 1 hr ball-milled TiO 2(B), and (c) 3 hrs ball ...
A rational design of TiO 2 catalyst supports by high-energy ball milling is presented. • Mixtures of titania phases were obtained due to polymorphic transformation. • Milling process increases oxygen vacancies, reducibility and oxygen mobility. • Unusual TiO 2 (II) phase remains stable even under extreme conditions. •
titanium dioxide ball mill grinding mill stirred ball Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Withdrawn Application number EP16000192.1A Other languages German (de ...
In this work, Ball Milling is investigated as a viable synthesis method for highly crystalline TiO 2 -ZnO composites. The composites were verified using various standard techniques. XRD measurements confirmed the presence of hexagonal wurtzite ZnO and tetragonal TiO 2 nano particles.
Journal of Alloys and Compounds 370 (2004) 296–301 Microstructural evolution of some MgO–TiO2 and MgO–Al2 O3 powder mixtures during high-energy ball milling and post-annealing studied by X-ray diffraction N. Stubičar a, A. Tonejc b, M. Stubičar b,∗ a Department of Chemistry, Faculty of Science, University of Zagreb, Marulićev trg 19/II, HR-10001 Zagreb, …
In this paper, we used a facile ball milling, microwave radiation and heating treatment method to achieve the surface modification of TiO2 with low g …
Nitrogen and carbon co-doped TiO2 particles with a brilliant yellow-orange color were produced mechanochemically by high-energy ball milling as one-pot synthesis. This facile synthesis required ...
In this work, we aim to reduce the crystal size of anatasetype TiO 2 powder - using a high-energy ball mill for the study of heat storage materials. 2. Experimental 1) Milling process: High purity (99.8%) anatase type TiO 2 (IV) powder was used in the present study. The 10 g powder sample was placed in a dry
C3N4/TiO2 hybrid photocatalysts with highly enhanced photocatalytic performance were prepared by a facile ball milling method. A layered structure of g-C3N4 was formed on the surface of TiO2. The mechanochemical process can promote the dispersion of C3N4 on the surface of TiO2 particles, to form a s …
The ball milling process promotes phase transition of TiO2 from anatase to rutile and yields ternary heterojunction of the type TiO2(A)/TiO2(R)/ZnO and TiO2(A)/TiO2(R)/SnO2 (A …
In this paper, Cu-doped TiO2 powder was prepared by sol–gel method and the influence of 1 h intermediate ball milling before calcination on different properties was investigated. The powders were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), differential thermal analysis (DTA), diffuse reflectance spectroscopy (DRS), …
The effects of Y 3+ mole fraction, ball-to-powder weight ratio, milling time and milling rate on the photocatalytic activities were evaluated by the degradation of methylene blue () under UV light. Then Y 3+ /TiO 2 photocatalysts prepared at the optimized ball milling conditions were applied to treat shrimp wastewater under UV and visible light.
In this research work, TiO2 nanoparticles were doped with iron powder in a planetary ball-milling system using stainless steel balls.
Nano Y 2 O 3, TiO 2, ZrO 2 dispersed W-Ni-Nb-Mo alloys are synthesized by mechanical alloying with varied ball to powder ratio. • Minimum crystallite size, maximum lattice strain is achieved in 20 h milled W-Ni-Nb-Mo-Y 2 O 3 alloy with 10:1 BPR. •
CaAl2O4:(Eu, Nd)/TiO2-xNy composite luminescent photocatalyst was successfully synthesized by a simple planetary ball milling process. Improvement of photocatalytic deNOx ability of TiO2-xNy, together with the persistent photocatalytic activity for the decomposition of NO after turning off the light were realized, by coupling TiO2-xNy with long afterglow phosphor, CaAl2O4:(Eu, …
The ball milling used to prepare composites with TiO 2 and MWCNT was a Retsch MM200 equipped with zirconium oxide balls and grinding jars [32]. The concentration of TiO 2 in the composite was always the same (90% wt.). The selected composition was based on the results of previous research [33].
