Results 221 to 230 of about 33,244 (269)

Titania Nanoflowers with High Photocatalytic Activity

Journal of the American Ceramic Society, 2006
Titania with nanostructures has attracted considerable attention due to its potential use in catalysts, gas sensors, photovoltaic cells, photonic crystals, etc. This paper reports the synthesis of titania nanoflowers by simply oxidizing pure titanium with hydrogen peroxide solutions containing hexamethylenetetramine and nitric acid
Osaka, A, Huang, B, Wang, M, Wu, JM
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Photocatalytic activity of semiconductor sulfide heterostructures

Dalton Transactions, 2013
This paper reports a theoretical and experimental study of the heterostructure photocatalytic activity in a CdS or ZnS and CdS@ZnS decorated system prepared by a microwave assisted solvothermal (MAS) method. A theoretical model of the decorated system was created in order to analyze the electronic transition mainly in their interface.
Raubach, Cristiane W., De Santana, Yuri V. B., Ferrer, Mateus M., Buzolin, Prescila G. C., Sambrano, Júlio R., Longo, Elson   +5 more
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The synthesis and photocatalytic activity of ZnSe microspheres

Nanotechnology, 2010
This paper reports the synthesis of semiconductor ZnSe microspheres composed of nanoparticles via a solvothermal route between the organic molecule selenophene (C(4)H(4) Se) and ZnCl(2) without adding any surfactant. The ZnSe microspheres were characterized by x-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), field ...
Huaqiang, Cao, Yujiang, Xiao, Sichun, Zhang   +2 more
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Photocatalytic Activity of Hydrogenated TiO₂

ACS Applied Materials & Interfaces, 2013
Photocatalysis is a promising advanced water treatment technology, and recently the possibility of using hydrogenation to improve the photocatalytic efficiency of titanium dioxide has generated much research interest. Herein we report that the use of high-temperature hydrogenation to prepare black TiO2 primarily results in the formation of bulk defects
Tim, Leshuk, Roozbeh, Parviz, Perry, Everett, Harish, Krishnakumar, Robert A, Varin, Frank, Gu   +5 more
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Chemical Auxiliary for Photocatalytic Active Colloids

Journal of the American Chemical Society
Active colloids with the ability to self-propel and collectively organize are emerging as indispensable elements in microrobotics and soft matter physics. For chemically powered colloids, their activity is often induced by gradients of chemical species in the particle's vicinity.
Wendi Duan, Yijiang Mu, Xiaoyong Mo, Zhisheng Wang, Tianran Zhang, Yannis Yan Lum Ho, Dengping Lyu, Dongwei Zhang, Runkai Zhao, Edmund Chun Ming Tse, Yongxiang Gao, Hao Wu, Yufeng Wang   +12 more
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Photocatalytic Activity of Inorganic Sunscreens

Journal of Dispersion Science and Technology, 2001
Some inorganic pigments are used as ingredients for sunscreens as they can absorb, reflect or scatter UV radiation. Titanium dioxide and zinc oxide, which are used for this purpose, are semiconductor oxides and show photocatalytic activity. As a consequence, they can promote transformation of organic molecules upon absorption of radiation.
Tatiana Picatonotto, Davide Vione, M. Eugenia Carlotti, Marina Gallarate   +3 more
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Preparation and photocatalytic activity of SnO2

Materials Letters, 2016
SnO2 is prepared by the hydrolysis and the automatic oxidation of SnCl2 in water, it shows the photo catalytic activity for the degradation of methyl orange in water under the UV light illumination. In the above process, methyl orange concentration decreases quickly, the total organic carbon (TOC) decreases slowly; inorganic ions (SO42-, NO3-, NH4 ...
Yu Zhiyong, Qiu Ruiying, Li Huanrong, Wang Zhiyin, Ma Xiaohong, Dong Chaonan   +5 more
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Why hydroxocobalamin is photocatalytically active?

Chemical Physics Letters, 2012
Abstract Time-dependent density functional theory (TD-DFT) has been applied to investigate the relevant excited states involved in the photodissociation of hydroxocobalamin (HOCbl). The TD-DFT/BP86/6-31G(d) and TD-DFT/BP86/6-311G(d,p)//BP86-631G(d) calculations suggest that the photoscission of Co–OH bond is mediated by the repulsive 1(n + dCo → σ∗Co–
Manoj Kumar, Pawel M. Kozlowski
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Photocatalytic activation of gypsum cements

Russian Journal of Applied Chemistry, 2017
Photocatalytic activity of gypsum cements that are based on the building plaster blend and synthetic calcium sulfate and contain 2–10 wt % titanium dioxide of anatase modification was studied. The decomposition rate of the model contaminant (Rhodamine C) on the surface of a plaster blend containing 2 wt %TiO2 becomes seven times higher under exposure ...
E. N. Krutsko, O. N. Musskaya, A. I. Kulak, V. K. Krut’ko   +3 more
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Photocatalytic activity of CuInS2 and CuIn5S8

Electrochimica Acta, 1992
Abstract The photocatalytic activity of CuInS 2 and CuIn 5 S 8 , prepared by chemical precipitation, for the hydrogen evolution from aqueous sulfite solution was investigated. The photocatalytic activity of CuIn 5 S 8 was about twice that of CuInS 2 and was improved remarkably by the addition of silver sulfide.
K. Kobayakawa, A. Teranishi, T. Tsurumaki, Y. Sato, A. Fujishima   +4 more
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