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wangzhuo9736木虫 (正式写手)
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【求助】请教有关石墨烯实验问题 已有12人参与
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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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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？ |
16楼2012-02-27 20:52:24
dudup2237
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2楼2011-02-21 09:53:35
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3楼2011-02-21 11:29:09
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4楼2011-02-21 21:18:48
