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Phase development during high-energy ball-milling of zinc oxide and iron - the impact of grain size on the source and the degree of contamination Abstract High-energy ball-milling of powder mixtures of zincite (ZnO) and iron (α-Fe) at different weight ratios was performed in air using a planetary ball mill with a stainless steel milling assembly.
Ball milling increased the mesopores and macropores of the nanocomposites by breaking biochar and squeezing ZnO. The addition of appropriate amount of ZnO into biochar enhanced both the adsorption capacity and photocatalytic ability of …
Although the ball milling of combustion products enhanced the solubility of Bi in the ZnO, it largely affected the NIR reflectance of Zn 1-x Bi x O series samples due to the strain induced by ball milling. The ball-milled multifunctional Zn 1-x Bi x O (x = 0.1) materials revealed severe agglomeration of fine particles in the FESEM micro-images.
In this research, high energy ball milling, which is a possible technique to narrow the band gap, was employed to tune band structure of ZnO. The ball-milled particles were evaluated by XRD, FE-SEM, UV-Vis, and EIS measurements. XRD measurements showed that the average particle size of ZnO nanoparticles was significantly decreased by ball milling.
2O3-ZnO Glasses by High Energy Ball Milling (Attritor). Journal of Materials Vol. 1, No. 4, 2015, pp. 168-173. Abstract Lead, boron and zinc oxides powder were subjected to the mechanical milling/alloying to study the structural transformation. The process was carried out at room temperature in a high energy ball milling (attritor).
ZnO varistors were synthesized with ZnO powders and intensity milled composite additives as raw materials. The effect of milling time of the composite additives on the grain boundary phase distribution as well as the electrical properties was investigated in detail. The results show that ball milling composite additives have a significant effect on the ZnO varistors.
A detailed investigation is presented for the solvent-free mechanochemical synthesis of zinc oxide nanoparticles from ε-Zn(OH)2 crystals by high-energy ball milling. Only a few works have ever explored the dry synthetic route from ε-Zn(OH)2 to ZnO. The milling process of ε-Zn(OH)2 was done in ambient conditions with a 1:100 powder/ball mass ratio, …
We report a systematic investigation of the thermoelectric properties of n-type Ga-doped ZnO synthesized using different ball milling conditions. Samples fabricated by the high-energy ball milling resulted in a highly dense layered structure with randomly distributed voids. These samples measured the lowest room temperature thermal conductivity, i.e., 27 W/mK …
Nanoparticles of zinc oxide (ZnO) are increasingly recognized for their utility in biological applications. In this study, the high-energy ball milling (HEBM) technique was used to produce nanoparticles of ZnO from its microcrystalline powder. Four samples were ball milled for 2, 10, 20, and 50 hours, respectively.
Is the ball milling of zinc powder has to be operated with the protection of inert atmosphere and/or continuous cooling for both safety and oxidation problems? ... I …
The p-n junction photocatalyst, p-CuO/n-ZnO, was prepared via ball milling of ZnO and CuO nanoparticles in water. The structural, optical, and surface properties of the p-n junction photocatalyst p-CuO/n-ZnO were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-Vis spectroscopy, and Zeta potential analyzer.
The different particle sizes of ZnO, namely 0.1, 0.2, 0.3, 0.5, and 0.8 μm were synthesized by heating the reagent grade ZnO powder at 1400 °C and planetary ball milling process. The antibacterial test of the ZnO powder was conducted by changing the electrical conductivity with bacterial growth.
ZnO nanoparticles were synthesized by solid coprecipitation method with consecutive high energy ball milling procedure. By reducing the particle size of ZnO to nano dimensions strong nano-size effects were observed. In order to characterize the ZnO defect structure, EPR has been applied.
Abstract: Nanoparticles of zinc oxide (ZnO) are increasingly recognized for their utility in biological applications. In this study, the high-energy ball milling (HEBM) technique was used to produce nanoparticles of ZnO from its microcrystalline powder. Four samples were ball milled for 2, 10, 20, and 50 hours, respectively.
Abstract Nanoparticles of zinc oxide (ZnO) are increasingly recognized for their utility in biological applications. In this study, the high-energy ball milling (HEBM) technique was used to produce nanoparticles of ZnO from its microcrystalline powder. Four samples were ball milled for 2, 10, 20, and 50 hours, respectively.
The characteristics of ZnO could be effectively tuned by tuning the microstructure. One way for altering the properties is the synthesis of ZnO nanocomposite with various materials. Here we report upon the doping of ZnO with nanodiamonds (NDs) to effectively alter its optoelectronic properties. The doping is performed by ball milling technique.
Nanoparticles of zinc oxide (ZnO) are increasingly recognized for their utility in biological applications. In this study, the high-energy ball milling (HEBM) technique was used to produce...
In this work, we propose the synthesis of ZnO nanostructures through the thermal oxidation of ball-milled powders with the introduction of Mg and Sn doping species at the preliminary step of milling. We investigate the advantages and challenges of this two steps process for the production and fabrication of highly crystalline ZnO nanowires. This simple method allows us …
This work evaluates how the High Energy Ball Milling (HEBM) in a shaker mill influences the optical, physical, and microstructural properties of ZnO. The procedure also combines Fe inclusion from the grinding medium with particle size reduction.
ZnO/TiO 2 is successfully fabricated by a facile ball-milling process.. Photocatalytic performance of ZnO/TiO 2 is 1.4 times higher than that of commercial TiO 2.. ZnO/TiO 2 decreased drastically NO 2 conversion yield from 12.78% to 7.18%.. Photogenerated holes play an essential role in the NO photocatalytic reaction of ZnO/TiO 2.
The XRD patterns of Al / ZnO double milled powders, with 4, 8, 10, and 12 h milling times, are shown in Figs. 2 a to 2 d, respectively.In contrast to single ball milled powders in Fig. 1, in this case, with increasing milling time, increasing Zn line intensity was observed.This fact is more noticeable when pattern in Fig. 2 a is compared with patterns of Figs. 2 e and 2 d.
The 5 wt% Fe 3 O 4 doped ZnO (Sigma-Aldrich, USA) was prepared by ball milling. The tungsten carbide vial and two balls (10 mm dia) were utilized. The vial was fixed into a holder and ball milled in a planetary motion in a normal atmosphere for 40 hrs. The ball mill was operated at a speed of 1425 rpm.
High-energy ball-milling of powder mixtures of zincite (ZnO) and iron (α-Fe) at different weight ratios was performed in air using a planetary ball mill with a stainless steel milling assembly. Structural and microstructural changes during …
The preparation of high specific area (86.5 m2/g) ZnO nanospheres with good photocatalytic efficiency via a simple, green and efficient mechanochemical method was reported in this work. The products were characterized by XRD, SEM, TEM, BET and UV–Vis. The ball milling parameters were improved to reduce the agglomeration hazard during the ball milling …
Short communication ZnO/graphene nanocomposite fabricated by high energy ball milling with greatly enhanced lithium storage capability Mingpeng Yua,b, Dali Shaoc, Fengyuan Lub, Xiang Sunb, Hongtao Sunb, Tao Hub, Gongkai Wangb, Shayla Sawyerc, Hong Qiud, Jie Lianb,⁎ a Department of Chemistry, Tsinghua University, Beijing 100084, China b Department of …
This paper first introduces several common synthesis methods of ZnO nanowires and then summarizes the one dimensional nanomaterials produced by the ball milling and annealing method. Finally, some preliminary results of ZnO nanowire synthesis are presented. 1. INTRODUCTION Zinc oxide (ZnO) is an important semiconductor with a
ZnO, having good transparency, high electron mobility and lower electrical noise, is an excellent material for electrochemical studies. Due to its high surface area and electrical conductivity, graphene is well suitable for the good dispersion of metal oxides for electronic/electrochemical applications. Graphene prevents particle agglomeration, whereas …
Sodium potassium niobate (KNN) based piezoceramics added with different amount of ZnO were prepared by ceramic method using high energy ball milling. The samples prepared have compositional formula Na0. 47K0.47Li0.06NbO3 + (x) ZnO (x = 0 wt%, 0.5 wt%, 1 wt%, 1.5 wt%, and 2 wt%) and sintered at 1000 °C for 2 h. The crystalline phase, …
decrease with the increase of the ball-milling time or rotating speed. It is well-known that the ball-milling treatment might cause the ZnO particles to become small and consequently increase the surface area of the photocatalyst. The specific surface area of the pristine ZnO is 10.5 m2/g. After milling treatment, it increases to 13.0 m2/g ...
Here we report on the tuning of optoelectronic properties of ZnO upon doping by nanodiamonds (NDs) using the ball milling technique. A varying weight percent (wt.%) of NDs were ball milled for 2 h with ZnO nanoparticles prepared by a simple precipitation method.