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wangzhuo9736木蟲(chóng) (正式寫(xiě)手)
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[交流]
【求助】請(qǐng)教有關(guān)石墨烯實(shí)驗(yàn)問(wèn)題 已有12人參與
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看了一篇有關(guān)石墨烯電催化氧化的文獻(xiàn),合成中加入了PDDA(聚二丙烯基二甲基氯化銨)請(qǐng)問(wèn)加入有什么用? 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 ] |
新蟲(chóng) (小有名氣)
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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 請(qǐng)問(wèn)一下帥哥,這樣得到的合金納米粒子表面是不是帶正電荷啊? |

木蟲(chóng) (正式寫(xiě)手)

鐵桿木蟲(chóng) (著名寫(xiě)手)

木蟲(chóng) (正式寫(xiě)手)
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