鈉鹽含量一直被視為引發代文明病的主因之一,發展一快速、方便與靈敏的檢測其含量是刻不容緩的。本實驗使用簡單的熱解方式合成金奈米顆粒溶液,並使用抗壞血酸增強其靈敏度,無添加抗壞血酸金奈米溶液於 0.1M 濃度的氯化鈉中需 300 秒才會開始有顏色變化,但添加微量抗壞血酸後只需要 5 秒即可肉眼辨識出來,時間足足縮短了 60 倍;透過掃描式電子顯微鏡、酸鹼值量測、吸收光譜與傅立葉紅外線光譜儀等分析,我們發現金奈米顆粒顏色變化之機制在於,鈉鹽之添加會破壞金奈米顆粒表面之碳氧鍵結,從而使金奈米顆粒開始團聚,在奈米尺度下因表面電漿共振(LSPR)原因使得顏色變化急遽,因此造成其肉眼可辨識之偵測能力。我們也由金奈米顆粒表面修飾之條件調整,使其偵測靈敏度得以進一步提升,以期未來能實際應用於居家檢測之目的。另外,海洋汙染及工業廢水的排放是這世代人們常面對到的問題,以此為出發點。發明一種既疏水性又同時具親油性及親有機/無機化學物質的多功能仿生海綿,依實驗結果可看到,本實驗有成功的製作極具多功能性的仿生海綿,疏水效果最高可達160.84。其中破壞性溶劑測試可看到仿生海綿最高吸取的溶劑可達409.28%,溶劑吸取率非常良好。海綿結構於溶劑回收測試中,依照結果可看出此海棉回收性很高可到達6次以上,而第6次回收率最高的溶劑吸取量還可到360.23%,由破壞性測試可看出此海綿結構非常穩固,相信未來可以廣泛的應用於處理環境污染問題的處理上。
Contents of Sodium salt content have been regarded as one of the main causes of civilization disease. The development of rapid, easy-employed and sensitive detection is important. In this study, a pyrolysis method is used to prepared size-controlled Au nanoparticles (AuNPs) with the addition of ascorbic acid. Thel color change of AuNPs-based probe solution without adding ascorbic acid is above 300 s for detecting salt, but with the functionalized AuNPs probe solution, the detection duration is decreased to less than 5 s for the detection of salt. Through SEM observations, tests of pH values, absorption and FTIR spectra, the mechanism of sensing capability is revealed based on the concept of localized surface plasmon resonance (LSPR). This detection method is expected for the applications of medical diagnosis. In addition, marine pollution and industrial waste water are the serious issues for the current generation. For this, we have developed the multi-functional bionic sponges, which exhibit the capability of superhydrophobic and lipophilicity to treat organic/inorganic substances. According to our experimental results, the contact angle can reach as high as 160.84 degree. Value of solvent adsorption under durability test is 409.28% in the bio-inspired composite sponges. In the test of recycling utilizations, the maximum absorption capability can still of up to 360.23% after six times of recycling use and maintain sound structural stability, which is considered to be potential for the treatment of oil pollution and industrial waste.
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