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wangzhuo9736

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[交流] 【求助】请教有关石墨烯实验问题 已有12人参与

看了一篇有关石墨烯电催化氧化的文献,合成中加入了PDDA(聚二丙烯基二甲基氯化铵)请问加入有什么用啊?
PtAu/graphene nanocomposites (Pt:Au=1:1) were synthesized at room temperature. First, 0.249 mL H2PtCl6 (7.53 mg Pt mL-1 H2O) and 0.420 mL HAuCl4 (4.46 mg Au mL-1 H2O) were added into 200 mL of deionized H2O under vigorous stirring. A 150 mg of PDDA solution (35wt. % in H2O solution) was added to capture the PtCl6
2- and AuCl4- ions within the long chains of PDDA via the electrostatic interaction.

[ Last edited by justinzhao on 2011-2-21 at 10:56 ]
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zhaoyuting

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7楼: Originally posted by zhkg7120 at 2011-02-22 09:13:37:
A 150 mg of PDDA solution (35wt. % in H2O solution) was added to capture the PtCl6
文章里面说的很明白 PDDA是用来捕获PtCl62-的
因为PDDA是带正电荷的聚电解质 PtCl6是带负电荷的离子
PDDA不会是用来做 ...

PtAu/graphene nanocomposites (Pt:Au=1:1) were synthesized at room temperature. First,0.249 mL H2PtCl6 (7.53 mg Pt mL-1 H2O) and 0.420 mL HAuCl4 (4.46 mg Au mL-1 H2O) were added into 200 mL of deionized H2O under vigorous stirring. A 150 mg of PDDA solution (35wt. % in H2O solution) was added to capture the PtCl6 2- and AuCl4- ions within the long chains of PDDA via the electrostatic interaction.1 Then, a strong reducer NaBH4 (22.5 mg dissolved in 3.5 mL H2O) was added all at once and the reaction lasted for 5 min under vigorous stirring.During this process, the color of the solution changed from light yellow to brown, and PtAu alloy NPs were obtained. After that, 15 mg as-prepared graphene nanosheets were added into the PtAu solution above. Then, 100 mg KNO3 was used to promote PtAu NPs to load on graphene nanosheets.2
请问一下帅哥,这样得到的合金纳米粒子表面是不是带正电荷啊?
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16楼2012-02-27 20:52:24
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dudup2237

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你好,我也是作石墨烯的, 这篇文献可以发给我吗?
天下本无事,庸人自扰之
2楼2011-02-21 09:53:35
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birnessite

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加入PDDA是不是可以有助于石墨烯的分散啊
我思故我在
3楼2011-02-21 11:29:09
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wangzhuo9736

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引用回帖:
Originally posted by dudup2237 at 2011-02-21 01:53:35:
你好,我也是作石墨烯的, 这篇文献可以发给我吗?

好的,邮箱给我。请问你是做哪方面的啊?
4楼2011-02-21 21:18:48
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