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zhangjx7880至尊木蟲 (職業(yè)作家)
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【前沿】新型除菌凈水材料研究獲新進(jìn)展 已有4人參與
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最近,中科院金屬所尚建庫(kù)研究組與美國(guó)伊利諾大學(xué)合作研制出新型除微生物凈水材料。該材料在可見光或日光驅(qū)動(dòng)下,生成大量氧化能力極強(qiáng)的氫氧自由基,迅速破壞細(xì)胞壁,殺死水中各種微生物,達(dá)到光化殺菌的目的。他們發(fā)現(xiàn),微量氧化鈀納米離子的加入可以有效地控制半導(dǎo)體表面光電子的傳輸,不僅能大幅度提高光照下的殺微生物速度,也同時(shí)誘發(fā)催化記憶效應(yīng),致使光照熄滅長(zhǎng)達(dá)20小時(shí)后,該材料仍具有明顯的殺微生物能力,實(shí)現(xiàn)黑暗無光條件下的光化殺菌。催化記憶效應(yīng)的發(fā)現(xiàn),打破了傳統(tǒng)光化殺菌技術(shù)受光照要求的根本約束,拓寬了光化殺菌技術(shù)的應(yīng)用范圍,使利用自然光晝夜連續(xù)殺菌成為可能,有望大幅度降低凈水能耗。有關(guān)研究結(jié)果發(fā)表于2010年2月14日出版的《材料化學(xué)雜志》(Journal of Materials Chemistry)。黑暗無光條件下光化殺菌的實(shí)現(xiàn),在國(guó)際上引起了很大的反響,吸引了70多家國(guó)際科技新聞組織報(bào)道。 http://www.rsc.org/publishing/journals/JM/article.asp?doi=b917239d |
金蟲 (小有名氣)
| very good!!! |

木蟲 (正式寫手)
銅蟲 (小有名氣)
榮譽(yù)版主 (文壇精英)
Excellent
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English version: A novel visible light photocatalyst system was developed, consisting of palladium oxide (PdO) nanoparticles well dispersed on a nitrogen-doped titanium oxide (TiON) matrix. Clear evidence of photoelectron transfer between PdO nanoparticles and the TiON matrix was obtained for the first time. The optoelectronic coupling between PdO and TiON introduces enhanced photocatalytic bacterial disinfection under visible light illumination by electron trapping on a PdO nanoparticle, and a unique catalytic memory effect on bacterial disinfection due to the discharging of trapped electrons on PdO nanoparticles in the dark when the illumination is switched off. Thus, a unique robust catalytic disinfection system is created, which is driven by solar/visible light illumination, enables the continuous operation in day and night, and could be adapted to a broad range of environmental applications. |
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