The Cu/Al2O3 catalyzed ozonation for degrading an endocrine disruptor—alachlor in water was investigated. The Cu/Al2O3 powders were coated on a cordierite honeycomb column, which was taken as the reactor of catalytic ozonation of alachlor. Additional uncatalyzed experiments were carried out and the results were compared to those of the catalytic runs. The experimental results demonstrated that ...

Impact of the device size and thickness of Al2O3 film on the Cu pillars and resistive switching memory characteristics of the Al/Cu/Al2O3/TiN structures have been investigated for the first time. The memory device size and thickness of Al2O3 of 18 nm are observed by transmission electron microscope image. The 20-nm-thick Al2O3 films have been used for the Cu pillar formation (i.e., stronger Cu ...

This paper demonstrates that seeding nanocrystalline transition alumina powders is a viable option for producing high quality, alumina-based ceramics. By using a-Al2O3 concentrations of 51.25 wt.% a-Al2O3 seed particles (equivalent to 5 10 seeds/cm of g-Al2O3) the sintering temperature is reduced from 1600 C for unseeded g-Al2O3 to 1300–1400 C in dry pressed powders. The scale of the sinteredmi...

Al2O3 and Y2O3 are both very promising host materials for active integrated optics applications such as rare-earth ion doped waveguide lasers. In this paper, a reactive co-sputtering process for stable, target condition-independent deposition of Al2O3 layers with high optical quality is discussed. The loss of as-deposited Al2O3 waveguides in the near infrared wavelength range was 0.3 dB/cm. Rea...

In this study, Atomic Layer Deposition (ALD) equipment was used to deposit Al2O3 film on a p-type silicon wafer, trimethylaluminum (TMA) and H2O were as precursor materials, then the post-annealing process conducted under atmospheric pressure. The films annealed at different temperatures between 200–500 °C compared ascertain effect of passivation confirm changes in structure thickness before af...

Resumo Os materiais álcali-ativados são conhecidos por apresentarem rápido desenvolvimento de elevada resistência mecânica, alta estabilidade química e possível reutilização resíduos durante sua formulação, o que permite reaproveitar recursos reduzir impactos ambientais. O presente trabalho desenvolveu argamassas álcali-ativadas empregando cinzas caldeira dendê queima madeira, beneficiadas meio...

A simple and efficient Pd/Al2O3-NR-RD catalyst was prepared by depositing palladium on a shape controllable Al2O3-NR support through a two-step process that involves hydrothermal synthesis of Al2O3-NRs followed by reductive-deposition of palladium. This catalyst showed high activity in the catalytic formylation of amines by CO2-H2 under mild conditions with up to 96% yield.

Ni/Al2O3, Co/Al2O3 and bimetallic Ni(Co)/Al2O3 catalysts were prepared using an impregnation method and employed in CO2 dry reforming of methane under coking-favored conditions. The spent catalysts were carefully characterized using typical characterization technologies and inelastic neutron scattering spectroscopy. The bimetallic catalyst exhibited a superior activity and anti-coking performan...

The purpose of this research is to develop an optimal method for synthesizing of nanocrystalline Al2O3 monolayers at high growth rates on cemented carbides coated with an intermediate layer of pre-Al2O3-C (composite layers Al2O3-C/Al2O3). The use of quartz glass substrate allows for obtaining information about the quality of the layers such the thickness and density, because of its high transpa...

A nanocomposite containing polypropylene (PP) and nano α-Al2O3 particles was prepared using a Haake internal mixer. Mechanical tests, such as tensile and flexural tests, showed that mechanical properties of the composite were enhanced by addition of nano α-Al2O3 particles and dispersant agent to the polymer. Tensile strength was approximately ∼ 16% higher than pure PP by increasing the nano α-A...