نتایج جستجو برای: ni tio2

تعداد نتایج: 74567  

Journal: :Journal of environmental sciences 2015
Suttipan Pavasupree Stephan T Dubas Ratthapol Rangkupan

Polypropylene (PP) meltblown fibers were coated with titanium dioxide (TiO2) nanoparticles using layer-by-layer (LbL) deposition technique. The fibers were first modified with 3 layers of poly(4-styrenesulfonic acid) (PSS) and poly(diallyl-dimethylammonium chloride) (PDADMAC) to improve the anchoring of the TiO2 nanoparticle clusters. PDADMAC, which is positively charged, was then used as count...

Journal: :iranian journal of toxicology 0
جواد صاین javad saien department of applied chemistry, bu-ali sina university, hamedan, iran. امیر عزیزی amir azizi department of applied chemistry, bu-ali sina university, hamedan, iran. علیرضا سلیمانی ali reza soleymani department of applied chemistry, malayer university, malayer, iran.

background: heavy metals in aquatic systems usually interfere with many beneficial uses of water. divalent nickel is a commonly occurring toxic metal in natural ecosystems due to the effluent of refineries, electroplating, and casting industries. in aquatic environments, nickel appears as ni (ii) and ni0. despite the high reported toxicity for ni (ii), ni0 is only slightly toxic. various method...

Journal: :Dental materials journal 2012
Makiko Saita Kyo Kobayashi Fumihiko Yoshino Hiriko Hase Toru Nonami Katsuhiko Kimoto Masaichi-Chang-il Lee

It is well known that clinical bleaching can be achieved with a solution of 30% hydrogen peroxide (H2O2) or H2O2/titanium dioxide (TiO2) combination. This study examined the hypothesis that TiO2 coated with hydroxyapatite (HAp-TiO2) can generate reactive oxygen species (ROS). ROS are generated via photocatalysis using electron spin resonance (ESR). The bleaching properties of HAp-TiO2 in the pr...

2009
Tammy P. Chou Guozhong Cao

Xerogels consisting of SiO2 and TiO2 were explored for controlled release of brilliant blue FCF (BBF). Both SiO2 and SiO2–TiO2 xerogels were prepared by way of sol–gel processing, and the BBF release behavior was compared. SiO2–TiO2 xerogels with varying TiO2 content were also studied and the BBF release behavior was determined for each SiO2–TiO2 xerogel. It was found that the release of BBF fr...

2013
Kiran Gupta R P Singh Ashutosh Pandey Anjana Pandey

This paper reports the structural and optical properties and comparative photocatalytic activity of TiO2 and Ag-doped TiO2 nanoparticles against different bacterial strains under visible-light irradiation. The TiO2 and Ag-doped TiO2 photocatalysts were synthesized by acid catalyzed sol-gel technique and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-vis spe...

2016
Fei Tian Zhansheng Wu Yujun Yan Bang-Ce Ye Dandan Liu

N-Cu-activated carbon (AC)/TiO2 nanoparticles were prepared by the sol-gel technique through microwave irradiation to modify the visible-light response of TiO2. Their structure, surface chemical composition, and optical absorption properties were characterized. The results showed that the codoped particles had a higher surface area and smaller particle size than pure AC/TiO2 and monodoped AC/Ti...

2016
Naoki Hashizume Yutaka Oshima Makoto Nakai Toshio Kobayashi Takeshi Sasaki Kenji Kawaguchi Kazumasa Honda Masashi Gamo Kazuhiro Yamamoto Yasuhiro Tsubokura Shozo Ajimi Yoshiyuki Inoue Nobuya Imatanaka

A potentially useful means of predicting the pulmonary risk posed by new forms of nano-structured titanium dioxide (nano-TiO2) is to use the associations between the physicochemical properties and pulmonary toxicity of characterized forms of TiO2. In the present study, we conducted intratracheal administration studies in rats to clarify the associations between the physicochemical characteristi...

2013
Andreas Bachmeier Vincent C. C. Wang Thomas W. Woolerton Sophie Bell Juan C. Fontecilla-Camps Mehmet Can Stephen W. Ragsdale Yatendra S. Chaudhary Fraser A. Armstrong

The most efficient catalysts for solar fuel production should operate close to reversible potentials, yet possess a bias for the fuel-forming direction. Protein film electrochemical studies of Ni-containing carbon monoxide dehydrogenase and [NiFeSe]-hydrogenase, each a reversible electrocatalyst, show that the electronic state of the electrode strongly biases the direction of electrocatalysis o...

2015
Xiuyun Wang Wen Wu Zhilin Chen Ruihu Wang

In order to develop low-temperature (below 200 °C) and SO2-tolerant catalysts for selective catalytic reduction (SCR) of NOx, a series of cheap M/bauxite (M = Mn, Ni and Cu) catalysts were prepared using bauxite as a support. Their SCR performances are much superior to typical V2O5/TiO2, the addition of M into bauxite results in significant promotion of NOx removal efficiency, especially at low...

2014
Mikio Fukuhara Kazuyuki Sugawara

Charging/discharging behaviors of de-alloyed and anodic oxidized Ti-Ni-Si amorphous alloy ribbons were measured as a function of current between 10 pA and 100 mA, using galvanostatic charge/discharging method. In sharp contrast to conventional electric double layer capacitor (EDLC), discharging behaviors for voltage under constant currents of 1, 10 and 100 mA after 1.8 ks charging at 100 mA sho...

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