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lcc830306

銀蟲 (小有名氣)

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專業(yè): 無機(jī)合成和制備化學(xué)

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Aqueous Nanoceria. Nanoceria was synthesized in water by simple oxidation of cerium ions using a suitable oxidizer. A 0.5-0.7 g amount of cerium(III) nitrate
hexahydrate (Sigma Aldrich) was dissolved in 50 mL of deionized water (18.2 M¿

. The solution containing Ce(III) ion was then oxidized using 0.2 mL of hydrogen peroxide (30% w/w Sigma Aldrich) for acidic oxidation and 0.05 mL of ammonia for base-mediated oxidation (30% w/w Sigma Aldrich).
Glucose- and Dextran-Based Nanoceria. The aqueous procedure was slightly modified to incorporate the polymers in solution. Preparation of nanoceria in these polyhydroxyl groups was done in two separate concentrations. A 0.5 and 5 mM
solution of dextran (Sigma Aldrich) (MW 1000) and 2 and 20 mM solution of D-glucose (Sigma Aldrich) were prepared. Cerium(III) nitrate hexahydrate was then dissolved in these solutions and stirred to allow complete complexation to take
place. The solution was then oxidized using hydrogen peroxide (acidic) and ammonia (basic). A scheme of various experimental conditions is shown .

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1樓 2010-04-30 22:17:42

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lz3333

至尊木蟲 (正式寫手)

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lcc830306(金幣+30, 翻譯EPI+1): 2010-05-03 12:14

水相納米二氧化鈰
利用合適的氧化劑在水相中對三價鈰離子進(jìn)行氧化生成納米二氧化鈰，0.5-0.7g六水合硝酸鈰(III）(sigma Aldrich)溶于50ml去離子水中，含有三價鈰離子的溶液加入0.2ml過氧化氫（30%濃度）酸化氧化以及0.05ml氨水用于堿性氧化。
葡萄糖以及葡聚糖配基的納米級二氧化鈰
配置水相過程改成在溶液中同時加入聚合物。在這些多羥基集團(tuán)中制備二氧化鈰是在不同濃度中進(jìn)行。分別配置0.5mM和5mM的葡聚糖（分子量1000）以及2和20mM的D-葡萄糖溶液。六水合硝酸鈰(III）溶于這些溶液中并攪拌以使絡(luò)合反應(yīng)發(fā)生。然后溶液用過氧化氫和氨水進(jìn)行氧化。不同實驗條件的設(shè)計如下。

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2樓2010-04-30 22:41:16