Showing papers by "Akira Fujishima published in 2016"
TL;DR: In this paper, the degradation of acetaldehyde as a volatile organic compound under visible light irradiation was examined for a visible-light-driven photocatalyst, and the performance of the StO:R-doped SrTiO3 (STO:Rh) was evaluated.
Abstract: Rh-doped SrTiO3 (STO:Rh), a visible-light-driven photocatalyst, was examined for the degradation of acetaldehyde as a volatile organic compound under visible light irradiation. Pristine STO:Rh show...
14 citations
16 Aug 2016
5 citations
TL;DR: In this paper, a biomimetic design was developed by combining an organic monolithic resins, TiO2 photocatalyst, and polytetrafluoroethylene particles.
Abstract: In order to develop a durable highly hydrophobic surface, a biomimetic design was developed by combining an organic monolithic resin, TiO2 photocatalyst, and polytetrafluoroethylene particles. An accelerated weathering resistance examination revealed that the highly hydrophobic surface maintained a water contact angle exceeding 140° for 6 years. Moreover, high antiwear performance was confirmed by a rubbing test. Since the organic monolithic resin had co-continual structures with interconnected pores, new surface with a microstructure appeared continually by removal of the damaged surface. On the other hand, decomposition of organic compounds by TiO2 photocatalyst enabled self-etching of the damaged top layer of the organic monolithic resin. The flowing water due to rainfall or physical scraping contributed to the removal of the damaged surface. However, the film thickness after surface restoration was approximately constant. In addition, dynamic hydrophobicity could be improved when interconnected pores of the organic monolithic resins were impregnated with perfluorocarbon liquid. Thus, we have addressed essential issues and proposed a new method for designing hydrophobic surfaces with high durability.
4 citations
TL;DR: In this article, the authors propose a new method to improve the quality of the information provided by the users, by using the information gathered from the users' profiles of the service provider.
Abstract: 光触媒は省エネルギーな環境浄化技術として私達の日常の 様々な場面で使用されている。例えば,住宅やビルの壁,窓 ガラス,空気清浄機など多方面に及ぶ(図 1)。現在,主に使 用されている光触媒は酸化チタン(TiO2)であり,光照射に よって酸化分解と超親水性の二つの機能が発現する。酸化分 解は消臭,抗菌などに,超親水性は防曇,防汚(セルフクリー ニング効果)などにそれぞれ応用されている 。光触媒は 将来性が期待されている日本発の科学技術であり,光触媒評 価の標準化(ISO)に関する国際協調事業も進められているな ど進展し続けている技術である。 実際の製品に用いられている光触媒は酸化チタンであり, 化学的に安定で,繰り返し使用することができるだけでなく, その酸化分解力は数ある光触媒の中でも強力である。そのため, 近年使われている光触媒は,ほとんど全てが酸化チタンベー スとなっている。また,生体への毒性がなく,特定の波長の 光にのみ反応することから,医療分野での利用にも大きな関 心が寄せられるようになってきた。本稿では,まず光触媒が 示す反応や,光触媒による殺菌等について述べた後,光触媒 の医療分野への応用として,抗菌カテーテルや抗菌パネル, 空中浮遊菌の除去のための空気清浄機について紹介する。
1 citations