نتایج جستجو برای: titanium dioxide tio2

تعداد نتایج: 144192  

2015
Lung-Chien Chen Chiao-Yu Weng

This work elucidates the optoelectronic properties of graphene/methylammonium lead iodide (MAPbI3)/titanium dioxide (TiO2)/porous Si heterostructure diodes. The porous silicon substrates can accommodate more MAPbI3/TiO2 than the polished silicon substrate such that the MAPbI3/TiO2/porous Si substrate heterostructures have better optoelectronic properties. Photocurrents from 300 to 900 nm were m...

2014
Xiaolin Liu Min Guo Jianjun Cao Jia Lin Yuen Hong Tsang Xianfeng Chen Haitao Huang

Large-sized titanium dioxide (TiO2) nanotube arrays with an outer diameter of approximately 500 nm have been successfully synthesized by potentiostatic anodization at 180 V in a used electrolyte with the addition of 1.5 M lactic acid. It is found that the synthesized large-diameter TiO2 nanotube array shows a superior light scattering ability, which can be used as a light scattering layer to si...

2014
Jingli Yue Zhenhua Chen Yifeng E Lianshan Chen Jing Zhang Yimeng Song Yuchun Zhai

In this paper, we report the facile preparation of monodisperse titanium dioxide-diltiazem/tetrachlorobismuth core-shell nanospheres (TiO2@DTMBi), in which, diltiazem (DTM)/tetrachlorobismuth (BiCl4) complexes were employed as electroactive materials. The morphology, size, formation, and structure of the obtained TiO2@DTMBi spheres were investigated by transmission electron microscopy, scanning...

2008
A. Z. Sadek D. Buso A. Martucci P. Mulvaney W. Wlodarski K. Kalantar-zadeh

Amorphous titanium dioxide (TiO2) and gold (Au) doped TiO2-based surface acoustic wave (SAW) sensors have been investigated as hydrogen gas detectors. The nanocrystal-doped TiO2 films were synthesized through a sol-gel route, mixing a Ti-butoxide-based solution with diluted colloidal gold nanoparticles. The films were deposited via spin coating onto 64◦ YX LiNbO3 SAW transducers in a helium atm...

2017
Shigeru Kohtani Akira Kawashima Hideto Miyabe

Electrons, photogenerated in conduction bands (CB) and trapped in electron trap defects (Tids) in titanium dioxide (TiO2), play crucial roles in characteristic reductive reactions. This review summarizes the recent progress in the research on electron transfer in photo-excited TiO2. Particularly, the reactivity of electrons accumulated in CB and trapped at Tids on TiO2 is highlighted in the red...

Abstract Recently alcohol fuel cells has been increased consideration because of their environmental friendliness, high energy conversion efficiency and low emissions. Many effort have been made to improve the electro-oxidation performance of alcohols such as methanol, ethanol and propanol. In this work, a new method for ethanol oxidation based on core–shell titanium dioxide / carbon nanofib...

2006
S. Banerjee Judy Gopal P. Muraleedharan A. K. Tyagi Baldev Raj

When titanium dioxide (TiO2) is exposed to nearultraviolet light, it exhibits strong bactericidal activity. Anatase phase of TiO2 film was prepared by anodizing pure titanium coupons (substrate). Atomic force microscopy (AFM) technique was used to image the transformation of titanium surface to TiO2 surface on anodization. We observed wide distribution of TiO2 particles ranging from submicron t...

ژورنال: Medical Laboratory Journal 2012
Negahdary M (MSc), , Rezaei-Zarchi S (PhD), , Saadatmand M M (MSc), , Yazdanshenas M E (PhD), , Yousefi-telori B (BSc), ,

Abstract Background and objectives: In this research, the formation of chitosan-TiO2 nanocomposite and its antibacterial effect on Escherichia coli and staphylococcus aureus was investigated Material and Methods: to study the results, we used Scanning electron microscopy (SEM) and transition electron microscopy (TEM) images, infrared (IR) spectroscopy and ultraviolet-visible. Optical Density (O...

2017
Loghman Ghahremani Saeed Shirkavand Faezeh Akbari Niloofar Sabzikari

BACKGROUND Poor mechanical properties are among the main limitations of acrylic resins. Addition of titanium dioxide (TiO2) nanoparticles to acrylic resin has been shown to improve its mechanical properties with an adverse effect on its color. Thus, this study sought to assess the tensile and impact strength of a color modified heat cure acrylic resin reinforced with TiO2 nanoparticles. MATER...

Journal: :Analytical chemistry 2006
Hye Kyong Kweon Kristina Håkansson

Due to the dynamic nature and low stoichiometry of protein phosphorylation, enrichment of phosphorylated peptides from proteolytic mixtures is often necessary prior to their characterization by mass spectrometry. Several phosphopeptide isolation strategies have been presented in the literature, including immobilized metal ion affinity chromatography. However, that technique suffers from poor se...

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