نتایج جستجو برای: nnf ceram tio2

تعداد نتایج: 23239  

2014
Gil Soon CHOI Chulho OAK Bong-Kwon CHUN Donald WILSON Tae Won JANG Hee-Kyoo KIM Mannhong JUNG Engin TUTKUN Eun-Kee PARK

Titanium dioxide (TiO2) is increasingly widely used in industrial, commercial and home products. TiO2 aggravates respiratory symptoms by induction of pulmonary inflammation although the mechanisms have not been well investigated. We aimed to investigate lung inflammation in rabbits after intratracheal instillation of P25 TiO2. One ml of 10, 50 and 250µg of P25 TiO2 was instilled into one of the...

Journal: :Dalton transactions 2015
S Srinivasa Rao I Kanaka Durga Chandu V V M Gopi Chebrolu Venkata Tulasivarma Soo-Kyoung Kim Hee-Je Kim

Currently, TiO2 on a fluorine-doped tin oxide substrate is the most commonly used type of photoelectrode in high-efficiency quantum dot-sensitized solar cells (QDSSCs). The power conversion efficiency (PCE) of TiO2 photoelectrodes is limited because of higher charge recombination and lower QD loading on the TiO2 film. This article describes the effect of a TiO2 compact layer on a TiO2 film to e...

Journal: :Molecules 2015
Shozo Yanagida Susumu Yanagisawa Koichi Yamashita Ryota Jono Hiroshi Segawa

Mesoscopic anatase nanocrystalline TiO2 (nc-TiO2) electrodes play effective and efficient catalytic roles in photoelectrochemical (PEC) H2O oxidation under short circuit energy gap excitation conditions. Interfacial molecular orbital structures of (H2O)3 &OH(TiO2)9H as a stationary model under neutral conditions and the radical-cation model of [(H2O)3&OH(TiO2)9H]+ as a working nc-TiO2 m...

2013
Dawei Li Yingxin Zhao Qinghong Wang Yingnan Yang Zhenya Zhang

The effects of TiO2 photocatalysis on the hydrolysis of protein of waste activated sludge (WAS) and its biodegradability were investigated in this study. After 12-h UV irradiation, the removal ratio of protein by TiO2 photocatalysis reached 98.1%. The optimal condition for photocatalytic degradation of protein is TiO2 dosage of 5.0 mg·L under 2.4 w·m UV light irradiation. TiO2 photocatalysis in...

2014
Sunghoon Park Soohyun Kim Suyoung Park Wan In Lee Chongmu Lee

This study compared the responses of Pd-functionalized and pristine titanate (TiO2) nanotube arrays to ethanol with those to acetone to determine the effects of functionalization of TiO2 nanotubes with Pd nanoparticles on the sensitivity and selectivity. The responses of pristine and Pd-functionalized TiO2 nanotube arrays to ethanol gas at 200 °C were ~2877% and ~21,253%, respectively. On the o...

2017
Zhen-Long Zhang Jun-Feng Li Xiao-Li Wang Jian-Qiang Qin Wen-Jia Shi Yue-Feng Liu Hui-Ping Gao Yan-Li Mao

In this paper, N-doped TiO2 (N-TiO2) nanorod arrays were synthesized with hydrothermal method, and perovskite solar cells were fabricated using them as electron transfer layer. The solar cell performance was optimized by changing the N doping contents. The power conversion efficiency of solar cells based on N-TiO2 with the N doping content of 1% (N/Ti, atomic ratio) has been achieved 11.1%, whi...

Journal: :Coatings 2021

Improving the bond strength of veneering ceramics to ZrO2-based cores remains a challenge. The purpose this study was evaluate shear different ZrO2 containing calcium silicate (CaSi) ceramics. Five types (n = 230) were divided into two groups: with or without oxygen plasma treatment. These bound (IPS e.max Ceram VITA VM9). Shear various measured 10), in addition phase composition, surface morph...

Journal: :Environmental Health Perspectives 2002
Qamar Rahman Mohtashim Lohani Elke Dopp Heidemarie Pemsel Ludwig Jonas Dieter G Weiss Dietmar Schiffmann

Inhaled ultrafine titanium dioxide (UF-TiO2) particles cause pronounced pulmonary inflammation, in contrast to fine TiO2. Previous studies provide evidence for the production of reactive oxygen species by alveolar macrophages, after overloading with UF-TiO2 particles and cytotoxicity of UF-TiO2 in rat lung alveolar macrophages. UF-TiO2 also causes pulmonary fibrosis and lung tumors in rats. UF-...

Journal: :Chemosphere 2008
Bao-ling Yuan Xiang-zhong Li Nigel Graham

The photocatalytic degradation of dimethyl phthalate (DMP) in aqueous TiO2 suspension under UV illumination has been investigated using oxygen (O2) and ferrate (Fe(VI)) as electron acceptors. The experiments demonstrated that Fe(VI) was a more effective electron acceptor than O2 for scavenging the conduction band electrons from the surface of the catalyst. Some major intermediate products from ...

Journal: :Dental materials : official publication of the Academy of Dental Materials 2012
Bogna Stawarczyk Mutlu Ozcan Christoph H F Hämmerle Malgorzata Roos

OBJECTIVES The aim of this study was to compare the fracture load of veneered anterior zirconia crowns using normal and Weibull distribution of complete and censored data. METHODS Standardized zirconia frameworks for maxillary canines were milled using a CAD/CAM system and randomly divided into 3 groups (N=90, n=30 per group). They were veneered with three veneering ceramics, namely GC Initia...

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