Preparation of Visible Light-Activated Titania Photocatalyst by Mechanochemical Method

2003 ◽  
Vol 32 (4) ◽  
pp. 358-359 ◽  
Author(s):  
Shu Yin ◽  
Qiwu Zhang ◽  
Fumio Saito ◽  
Tsugio Sato
Keyword(s):  
Visible Light ◽  
Mechanochemical Method ◽  
Titania Photocatalyst

scholarly journals Elemental composition control of gold-titania nanocomposites by site-specific mineralization using artificial peptides and DNA

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Makoto Ozaki ◽  
Takahito Imai ◽  
Takaaki Tsuruoka ◽  
Shungo Sakashita ◽  
Kin-ya Tomizaki ◽  
...  
Keyword(s):  
Visible Light ◽  
Elemental Composition ◽  
Inorganic Compounds ◽  
Medical Science ◽  
Induction Effect ◽  
Site Specific ◽  
Composition Control ◽  
Light Excitation ◽  
Titania Photocatalyst ◽  
Scale Control

AbstractBiomineralization, the precipitation of various inorganic compounds in biological systems, can be regulated in terms of the size, morphology, and crystal structure of these compounds by biomolecules such as proteins and peptides. However, it is difficult to construct complex inorganic nanostructures because they precipitate randomly in solution. Here, we report that the elemental composition of inorganic nanocomposites can be controlled by site-specific mineralization by changing the number of two inorganic-precipitating peptides bound to DNA. With a focus on gold and titania, we constructed a gold-titania photocatalyst that responds to visible light excitation. Both microscale and macroscale observations revealed that the elemental composition of this gold-titania nanocomposite can be controlled in several ten nm by changing the DNA length and the number of peptide binding sites on the DNA. Furthermore, photocatalytic activity and cell death induction effect under visible light (>450 nm) irradiation of the manufactured gold-titania nanocomposite was higher than that of commercial gold-titania and titania. Thus, we have succeeded in forming titania precipitates on a DNA terminus and gold precipitates site-specifically on double-stranded DNA as intended. Such nanometer-scale control of biomineralization represent a powerful and efficient tool for use in nanotechnology, electronics, ecology, medical science, and biotechnology.

Emergence Change of Carbon Dioxide from Artificial Skin by Titania Photocatalyst

2007 ◽  
Vol 544-545 ◽  
pp. 55-58
Author(s):  
Eiji Watanabe ◽  
Mitsuharu Fukaya ◽  
Hiroshi Taoda
Keyword(s):  
Carbon Dioxide ◽  
Visible Light ◽  
Uv Irradiation ◽  
Visible Light Irradiation ◽  
Human Body ◽  
Light Condition ◽  
The Other ◽  
Artificial Skin ◽  
Irradiation Condition ◽  
Titania Photocatalyst

The influence of the titania photocatalyst particle of the nanometer region on the human being and biology’s to be doubted. Removing the uneasiness will expand further uses for the photocatalyst nanoparticle. Then, we attempted to examine the effect of several titania photocatalyst nanoparticles to the artificial skin like the human body under the UV and visible light irradiation conditions. The decomposition degree of the artificial skin was evaluated from the monitoring of the amount of carbon dioxide generated from them by the titania photocatalyst nanoparticle activity. Under the UV irradiation condition, it was almost found the carbon dioxide emergence from the artificial skin by the activity of the titania photocatalyst nanoparticle. On the other hand, under visible light condition it was mostly detected.

Visible-light-driven boron/ferrum/cerium/titania photocatalyst

2008 ◽  
Vol 200 (2-3) ◽  
pp. 141-147 ◽  
Author(s):  
Qincai Ling ◽  
Jianzhong Sun ◽  
Qiyun Zhou ◽  
Qian Zhao ◽  
Hua Ren
Keyword(s):  
Visible Light ◽  
Visible Light Driven ◽  
Titania Photocatalyst

Simple fabrication of twist-like helix N,S-codoped titania photocatalyst with visible-light response

2008 ◽  
Vol 79 (1) ◽  
pp. 72-80 ◽  
Author(s):  
Jian-Hua Xu ◽  
Jingxia Li ◽  
Wei-Lin Dai ◽  
Yong Cao ◽  
Hexing Li ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Response ◽  
Visible Light Response ◽  
Titania Photocatalyst

Synthesis of visible-light responsive nitrogen/carbon doped titania photocatalyst by mechanochemical doping

2007 ◽  
Vol 42 (7) ◽  
pp. 2399-2404 ◽  
Author(s):  
Shu Yin ◽  
Masakazu Komatsu ◽  
Qiwu Zhang ◽  
Fumio Saito ◽  
Tsugio Sato
Keyword(s):  
Visible Light ◽  
Carbon Doped ◽  
Titania Photocatalyst ◽  
Doped Titania

Visible-light responsive zinc ferrite doped titania photocatalyst for methyl orange degradation

2007 ◽  
Vol 42 (22) ◽  
pp. 9239-9244 ◽  
Author(s):  
Ping Cheng ◽  
Changsheng Deng ◽  
Mingyuan Gu ◽  
Wenfeng Shangguan
Keyword(s):  
Methyl Orange ◽  
Visible Light ◽  
Zinc Ferrite ◽  
Methyl Orange Degradation ◽  
Titania Photocatalyst ◽  
Doped Titania
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