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.

Impact Evaluation to Human Body Skin of Titania Photocatalyst Fine Particles

2006 ◽  
Vol 510-511 ◽  
pp. 38-41
Author(s):  
Eiji Watanabe ◽  
Mitsuharu Fukaya ◽  
Hiroshi Taoda
Keyword(s):  
Carbon Dioxide ◽  
Human Body ◽  
Impact Evaluation ◽  
Fine Particle ◽  
Fine Particles ◽  
Test Method ◽  
Artificial Skin ◽  
Evaluation Test ◽  
The Difference ◽  
Titania Photocatalyst

The establishment of evaluation test method of the titania photocatalyst fine particle impact to human body skin was attempted. In this method, the amount of emergence of carbon dioxide, which was expected one of the generation products from the artificial skin according to the titania photocatalyst fine particles activity, was identified and measured by the gas analyzer. It was found that the amount of the carbon dioxide evolution from the artificial skin was different according to the difference of the particle size of the titania photocatalyst fine particle.

Photoelectrochemical reduction of carbon dioxide to methanol on p-type CuFe2O4 under visible light irradiation

2018 ◽  
Vol 43 (39) ◽  
pp. 18185-18193 ◽  
Author(s):  
Kaykobad Md Rezaul Karim ◽  
Huei Ruey Ong ◽  
Hamidah Abdullah ◽  
Abu Yousuf ◽  
Chin Kui Cheng ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
P Type

Influence by Difference of the Photocatalyst Nanoparticle Shape to Skin

2009 ◽  
Vol 620-622 ◽  
pp. 659-662
Author(s):  
Eiji Watanabe ◽  
Kaori Nishizawa ◽  
Takeshi Miki ◽  
Hiroshi Taoda
Keyword(s):  
Carbon Dioxide ◽  
Uv Light ◽  
Nano Particles ◽  
Artificial Skin ◽  
Titania Nanoparticles ◽  
Nano Particle ◽  
Skin Sample ◽  
Nanoparticle Shape ◽  
Apatite Coating ◽  
Titania Photocatalyst

The influence of the titania photocatalyst nano-particles to the skin is to be doubted. We studied the influence of different titania photocatalyst nanoparticles shape to the artificial skin like the human body under the UV 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. When spreading their titania nanoparticles on the skin sample, the carbon dioxide generated from the skin was not detected in the apatite coating titania nano-particle sample through was detected the sample coating no apatite. The result was considered not to have existed the influence on the skin samples because the titania nano-particle was not to touch the skin sample directly.

Photocatalytic reduction of carbon dioxide to methanol by Cu2O/SiC nanocrystallite under visible light irradiation

2011 ◽  
Vol 20 (2) ◽  
pp. 145-150 ◽  
Author(s):  
Huiling Li ◽  
Yonggen Lei ◽  
Ying Huang ◽  
Yueping Fang ◽  
Yuehua Xu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Photocatalytic Reduction ◽  
Light Irradiation

scholarly journals Photocatalytic conversion of CO2 into methanol: Significant enhancement of the methanol yield over Bi2S3/CdS photocatalyst

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
M.Rahim Uddin ◽  
Maksudur R. Khan ◽  
M. Wasikur Rahman ◽  
Chin Kui Cheng ◽  
Abu Yousuf
Keyword(s):  
Carbon Dioxide ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Sol Gel ◽  
Light Irradiation ◽  
Significant Enhancement ◽  
Gel Method ◽  
Sol Gel Method ◽  
Photocatalytic Activities ◽  
Carbon Dioxide Co2

The present work is a significant approach to explore the photo-conversion of carbon dioxide (CO2) into methanol on Bi2S3/Cds photocatalyst under visible light irradiation. In this perspective, Bi2S3 nanoparticles have been successfully synthesized via corresponding salt and thiourea assisted sol-gel method. An innovative hetero-system Bi2S3/CdS has been proposed to achieve methanol photo evolution and its photocatalytic activities have been investigated.

scholarly journals Enhanced Activation of Persulfate by Co-Doped Bismuth Ferrite Nanocomposites for Degradation of Levofloxacin Under Visible Light Irradiation

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3952 ◽  
Author(s):  
Xin Zhong ◽  
Zheng-Shuo Zou ◽  
Hu-Lin Wang ◽  
Wei Huang ◽  
Bin-Xue Zhou
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Degradation Mechanism ◽  
Bismuth Ferrite ◽  
Light Condition ◽  
Photogenerated Electron ◽  
Active Species ◽  
Light Irradiation ◽  
Co Doped

In this study, magnetic visible light driven photocatalysts (bismuth ferrite, Bi2Fe4O9, BFO and Co-doped bismuth ferrite, Co-BFO) were successfully prepared by the facile hydrothermal method. The catalyst was used in the application of heterogeneous persulfate (PS) system under visible LED light irradiation for the degradation of levofloxacin (LFX), proving to be an excellent photocatalyst when evaluated by various characterization methods. The effect of Co-doping in the BFO structure was investigated that the decrease of band gap width and the generated photoelectrons and holes would effectively reduce the recombination of photogenerated electron-hole pairs, leading to the enhancement photocatalytic activity. The results demonstrated that Co-BFO catalyst had a high photodegradation efficiency over a wide pH range of 3.0–9.0 and the Co-BFO-2 composite displayed the optimal catalytic performance. It was found that the degradation rate of LFX by Co-BFO-2 catalyst was 3.52 times higher than that of pure BFO catalyst under visible light condition. The free radical trapping experiments and EPR tests demonstrated that superoxide, photogenerated holes and sulfate radicals were the main active species in the photocatalytic degradation of LFX. And a possible photocatalytic degradation mechanism of LFX was proposed in the Vis/Co-BFO/PS process. These findings provided new insight of the mechanism of heterogeneous activation of persulfate by Co-BFO under visible light irradiation.

Coordination polymers with a pyridyl–salen ligand for photocatalytic carbon dioxide reduction

2020 ◽  
Vol 56 (29) ◽  
pp. 4110-4113 ◽  
Author(s):  
Yi Liu ◽  
Jin-Han Guo ◽  
Xiao-Yao Dao ◽  
Xiu-Du Zhang ◽  
Yue Zhao ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Coordination Polymers ◽  
Visible Light Irradiation ◽  
Carbon Dioxide Reduction ◽  
Light Irradiation ◽  
Salen Ligand

Fe(iii) and Mn(iii) coordination polymers with a pyridyl–salen ligand were constructed and have shown photocatalytic activity for CO2 reduction under visible-light irradiation.

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