Over the last two decades, oxide nanostructures have been continuously evaluated and used in many technological applications. The advancement of the controlled synthesis approach to design desired morphology is a fundamental key to the discipline of material science and nanotechnology. These nanostructures can be prepared via different physical and chemical methods; however, a green and ecofriendly synthesis approach is a promising way to produce these nanostructures with desired properties with less risk of hazardous chemicals. In this regard, ZnO and TiO2 nanostructures are prominent candidates for various applications. Moreover, they are more efficient, non-toxic, and cost-effective. This review mainly focuses on the recent state-of-the-art advancements in the green synthesis approach for ZnO and TiO2 nanostructures and their applications. The first section summarizes the green synthesis approach to synthesize ZnO and TiO2 nanostructures via different routes such as solvothermal, hydrothermal, co-precipitation, and sol-gel using biological systems that are based on the principles of green chemistry. The second section demonstrates the application of ZnO and TiO2 nanostructures. The review also discusses the problems and future perspectives of green synthesis methods and the related issues posed and overlooked by the scientific community on the green approach to nanostructure oxides.

https://www.mdpi.com/1420-3049/26/8/2236/pdf

Green Synthesis and Applications of ZnO and TiO2 Nanostructures.

A new strategy of binary-size particles model for fabricating fine grain, high density and low resistivity ITO target

Designing high energy storage performance BSZT-KNN ceramics

Decoration of indium tin oxide nanoparticles with different crystal structures and morphologies on polypropylene separator for Li-S battery

Controllable phase transition ITO nano powders and temperature-structure sensitivity

The effects of sintering temperature, heating rate, holding time and sintering additive on the properties of single-phase indium tin oxide (ITO) target, prepared by normal pressure sintering method...

Influence of Bi2O3, TiO2 Additives and Sintering Process on the Performance of ITO Target Based on Normal Pressure Sintering Method

Dense ternary-size particles interstitial filling gradation stacking model for preparing high-quality indium tin oxide targets

The effect of particle size on the density and resistivity of ITO green bodies and targets was systematically investigated. The experimental results show that the relative density of ITO green bodies decreases with the increase of ITO particle size. When the particle size is 10.7 nm, the relative density of ITO green bodies rises to the maximum value of 56.6%. The resistivity declines exponentially with the increase of particle size, which satisfies the exponential equation of R = exp(−41.823 × d). When the particle size is 41.6 nm, the resistivity reaches the minimum value of 0.8 Ω·cm. The relative density of ITO target decreases with the increase of particle size. Fine particles can increase the driving force of densification in initial stage. Electron mobility, caused by grain boundary scattering, will increase due to the increase of particle size or the decrease of grain boundary potential. When the particle size is 10.7 nm, the target with compact grain stacking and low porosity shows a maximum relative density of 99.25%, and the resistivity reaches the minimum value of 0.34×10−3 Ω·cm.

Yunqian Ma

Papers

Influence of Bi2O3, TiO2 Additives and Sintering Process on the Performance of ITO Target Based on Normal Pressure Sintering Method

Dense ternary-size particles interstitial filling gradation stacking model for preparing high-quality indium tin oxide targets

Effect of Particle Size on Target Sintering Behavior of Cubic ITO Nanopowders