نتایج جستجو برای: invo4 tio2

تعداد نتایج: 22688  

2010
Ali Mahyar Mohammad Ali Behnajady Naser Modirshahla

SiO2-TiO2 mixed oxides have been prepared by sol-gel technique from titanium tetraisopropoxide and tetraethylorthosilicate. The prepared materials were characterized by X-ray diffraction, FT-IR spectroscopy, scanning electron microscopy, nitrogen physisorption and UV-vis diffuse reflectance spectroscopy. The results indicate that compared to pure TiO2, the SiO2-TiO2 mixed oxides show higher the...

Journal: :Chemical science 2017
Qian Wu James L Chu Stanislav S Rubakhin Martha U Gillette Jonathan V Sweedler

Localization of metabolites using multiplexed mass spectrometry imaging (MSI) provides important chemical information for biological research. In contrast to matrix-assisted laser desorption/ionization (MALDI), TiO2-assisted laser desorption/ionization (LDI) for MSI improves detection of low molecular mass metabolites (<500 Da) by reducing matrix background. However, the low UV absorption of Ti...

2010
Tieshi He Zhengfa Zhou Weibing Xu Yan Cao Zhifeng Shi Wei-Ping Pan

The preparation and photocatalysis of TiO2–ZnS/fluoropolymer fiber composites were investigated. The fluoropolymer nanofiber mats with carboxyl groups were prepared by electrospinning, and then titanium and zinc ions were introduced onto the fiber surfaces by the coordinating of carboxyl of fluoropolymer in solution. The TiO2–ZnS composites with diameters 15 nm to 1 lm were immobilized on the s...

2016
Huan Wang Yaoguang Wang Yong Zhang Qi Wang Xiang Ren Dan Wu Qin Wei

Carcinoembryonic antigen (CEA) was used as the model, an ultrasensitive label-free photoelectrochemical immunosensor was developed using 2D TiO2 nanosheets and carboxylated graphitic carbon nitride (g-C3N4) as photoactive materials and ascorbic acid as an efficient electron donor. 2D TiO2 nanosheets was sythsized by surfactant self-assembly method and proved to have higher photoelectrochemical ...

2016
Nannan Yao Jinzhao Huang Ke Fu Xiaolong Deng Meng Ding Shouwei Zhang Xijin Xu Lin Li

Eu(3+),Tb(3+) doped and undoped NiO films were deposited on TiO2 by a sol-gel spin-coating method as the photoanodes of dye sensitized solar cells (DSSCs). A comparative study with different structures including TiO2, TiO2/NiO and TiO2/NiO:Eu(3+),Tb(3+) as the photoanodes was carried out to illustrate the photovoltaic performance of solar cells. NiO could enhance the performance of DSSCs ascrib...

2005
Li-Lan Yang Yi-Sheng Lai J. S. Chen P. H. Tsai C. L. Chen Jason Chang

Thin films of SiO2–TiO2 composite oxides with various SiO2:TiO2 compositions were prepared by the sol-gel method, using tetraethylorthosilicate (TEOS) and titanium tetraisopropoxide (TTIP) as precursors. The composition, crystal structure, and chemical bonding configuration of the as-deposited and annealed SiO2–TiO2 thin films were analyzed using Rutherford backscattering spectrometry (RBS), gl...

2016
Kaviyarasu Kasinathan John Kennedy Manikandan Elayaperumal Mohamed Henini Maaza Malik

To photo-catalytically degrade RhB dye using solar irradiation, CeO2 doped TiO2 nanocomposites were synthesized hydrothermally at 700 °C for 9 hrs. All emission spectra showed a prominent band centered at 442 nm that was attributed to oxygen related defects in the CeO2-TiO2 nanocrystals. Two sharp absorption bands at 1418 cm-1 and 3323 cm-1 were attributed to the deformation and stretching vibr...

2012
Anthony G. Dylla Penghao Xiao Graeme Henkelman Keith J. Stevenson

The lithium insertion behavior of nanoparticle (3-D) and nanosheet (2D) architectures of TiO2(B) is quite different, as observed by differential capacity plots derived from galvanostatic charging/discharge experiments. DFT+U calculations show unique lithiation mechanisms for the different nanoarchitectures. For TiO2(B) nanoparticles, A2 sites near equatorial TiO6 octahedra are filled first, fol...

2008
Yu Zhiyong H. Keppner L. Kiwi-Minsker A. Renken

Parylene films loaded with TiO2 are reported as photocatalysts in azo dye discoloration processes. The TiO2 loading of the parylene film was 0.32% (w/w) and the amount of TiO2 on the film was about two orders of magnitude below the TiO2 added in suspension to discolore the same solution of Methyl Orange used as a probe. The parylene/TiO2 films showed a similar activity in the presence of O2 or ...

2014
I. Zamudio Pedro Escobedo

The aim of this chapter is to show the process for the growth of TiO2 nanotube by anodizing and its features as surface. The Ti anodized nanotubes were obtained by anodizing Ti in organic medium. The process of formation of TiO2 nanotubes on Ti surfaces was established ex-situ by Scanning Electron Microscopy (SEM). At first, the growth of the TiO2 on the surface of the Ti plate occurs because o...

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