Synthesis, Thermal Stability and Properties of ZnO₂ Nanoparticles

Abstract

ZnO 2 nanoparticles have been synthesized by an organometallic precursor method. The structure, structural stability, and magnetic and optical properties of ZnO 2 nanoparticles have been investigated by experiments and first-principles calculations. It is found that ZnO 2 nanoparticles decompose into ZnO at about 230°C and is stable up to 36 GPa at ambient temperature. The cubic ZnO 2 phase has a bulk modulus of B 0 ) 174 GPa at zero pressure. Nanocrystalline ZnO 2 material is an indirect semiconductor with an energy gap of about 4.5 eV and paramagnetic down to 5 K.

Preparation of ZnO2Nanoparticles Using Organometallic Zinc(II) Isobutylcarbamate in Organic Solvent

“…The TGA curve in Figure 8 shows that the weight losses below 100 °C were about 4.8%, indicating that the powder samples adsorbed water. 4 The small amount of adsorbed water in the powder samples was possible to avoid due to the preparation method using organic solvent such as 2-methoxyethanol. But the fine particle size and instability of the material retains moisture.…”

“…Co. Ltd. The hydrogen peroxide solution in 2-methoxyethanol was dehydrated with anhydrous MgSO 4 . TEM (JEM-2000EXII; JEOL, Tokyo, Japan), HR-TEM (JEM-3010; JEOL, Tokyo, Japan) and UV-vis (Shimadzu, UV-1601PC, Tokyo, Japan) spectrometry were employed to characterize the ZnO 2 NPs.…”

“…ZnO 2 NPs are a semi-conductor with a wide band gap energy of 4.20 eV. 4,5 ZnO 2 NPs can be applied to high-tech plastic processing 6,7 and the rubber industry. 8 They can also be used as an oxidant for explosives and pyrotechnic mixtures.…”

Comparative Study of Dye-Sensitized Solar Cell Based on ZnO and TiO2 Nanostructures

“…However pure ZnO thin films have a lower electric conductivity than ITO thin fims (You-Seung et al, 2008). Recently, hollow micro/nanostructures have become of great interst because of their excellent characteristics such as density , high surface-to-volume ratio, and how coefficient sof thermal expansion and refractive index, which makes them attractive for applications ranging from catalystsupports, anti-reflection surface coatings, microwaves absorption (Lou et al, 2008;Zhong et al, 2000) , encapsulating sentive materials Dinsmore et al, 2002), drug delivery, and rechargeable batteries (Liang et al, 2004;Lee et al, 2003 (Li et al, 2006), CuS (Liu et al, 2007;Yu et 2000), Sb 2 S 3 , ZnO (Zhou et al 2007;Lin, et al, 2009), CdMoO 4 ( Wang et al, 2009;Wang et al, 2006), and ZnWO 4 , have greatly advanced our ability to tune their mechanical, optical, electrical, and chemical properties to satisfy the various needs of practical applications. ZnO can be useful in many fields, such as in the rubber industry , photocatalysis ( Hsu et al, 2005), sunthesis of ZnO ( Hsu et al, 2005;Sun et al, 2007;Zhang et al, 2005).…”

“…ZnO can be useful in many fields, such as in the rubber industry , photocatalysis ( Hsu et al, 2005), sunthesis of ZnO ( Hsu et al, 2005;Sun et al, 2007;Zhang et al, 2005). Cosmetic and pharmaceutical industries, and for therapeutic applications (Rosenthal et al, 2008), but little work have been done in these areas (Rosenthalet al, 2008;Chen et al, 2009;Pal et al, 2009). ZnO, as a wide gape semiconductor material, is becoming an increasing concern because of its biocompatibility, nontoxity, and good mechanical, optical, electrical properties.…”