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關(guān)于小尺寸金納米棒(sAuNRs)的制備 已有2人參與
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想請(qǐng)教各位蟲友關(guān)于小尺寸金納米棒(sAuNRs)合成的問題。 我目前在制備sAuNRs,使用的方法為2016年發(fā)表在Biomaterials上的one-pot-seedless method。 在制備過程中,加入油酸鈉(NaOL)后,溶液會(huì)由橙黃色逐漸變?yōu)闊o色,請(qǐng)問這是什么原因?是與氯金酸反應(yīng)了嗎?謝謝各位蟲友。 附文獻(xiàn)中的步驟:The sAuNRs were synthesized by a one-pot seedless technique.1 mL of 5 mM HAuCl4, 5 mL of 0.2 M CTAB, and 4.5 mL of ultrapure water were mixed in a 50 mL glass beaker and then 500 mL of 0.1M NaOL and 250 mL of 4mM AgNO3 were added undergentle stirring. Afterwards, 8 mL of concentrated HCl (36%-38%) were injected, followed by addition of 56 mL of 0.1 M ascorbic acidunder slight swirling until the solution changed from dark orange to colorless. 15 mL of freshly prepared ice-cold 10 mM of NaBH4were added rapidly. The solution was gently mixed for 10 s and left undisturbed for 3 h in an incubator at 35 C. The nanorod solutionwas centrifuged at 16,000 rpm for 15 min to stop the reaction. 發(fā)自小木蟲Android客戶端 |
銀蟲 (正式寫手)
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嗯嗯,謝謝您的回復(fù)。 但是文獻(xiàn)步驟中后續(xù)提到“?followed by addition of 56 mL of 0.1 M ascorbic acidunder slight swirling until the solution changed from dark orange to colorless”。 應(yīng)該是使用抗壞血酸還原三價(jià)金為一價(jià)金,而產(chǎn)生顏色變化。 加入油酸鈉后變色,實(shí)驗(yàn)現(xiàn)象與文獻(xiàn)描述不符合。 希望您能不吝賜教。 發(fā)自小木蟲Android客戶端 |
銀蟲 (正式寫手)
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