Shiba Fumiyuki, Mameuda Ushio, Tatejima Seitarou, Okawa Yusuke
Department of Materials Science, Chiba University 1-33 Yayoicho Inageku Chiba 263-8522 Japan
Department of Image and Materials Science, Chiba University 1-33 Yayoicho Inageku Chiba 263-8522 Japan.
RSC Adv. 2019 Oct 28;9(59):34589-34594. doi: 10.1039/c9ra07080j. eCollection 2019 Oct 23.
A polyol process was applied to the synthesis of Prussian blue nanoparticles that have a narrow size distribution. Potassium hexacyanidoferrate(iii) and iron(iii) nitrate aqueous solutions were introduced into a 50% polyethylene glycol (PEG) aqueous solution under magnetic stirring at 50 °C and reacted for 48 h. The shape of the so-obtained particles was cubic with somewhat rounded edges and the mean size was 70 nm. In the formation process, nanoparticles of Prussian green, which is a partially oxidized state of Prussian blue, were firstly generated reduction of the precursors by PEG molecules. The Prussian green nanoparticles were then reduced subsequently to Prussian blue nanoparticles. Rate constants for both the reduction steps have been estimated using the time evolution of absorbance.
采用多元醇法合成了粒径分布窄的普鲁士蓝纳米颗粒。在50℃磁力搅拌下，将铁氰化钾(iii)和硝酸铁(iii)水溶液引入50%聚乙二醇(PEG)水溶液中，反应48 h。所得颗粒形状为立方体形，边缘略有圆角，平均粒径为70 nm。在形成过程中，普鲁士蓝的部分氧化态普鲁士绿纳米颗粒首先由PEG分子还原前驱体生成。然后将普鲁士绿纳米颗粒进一步还原为普鲁士蓝纳米颗粒。利用吸光度随时间的变化估算了两个还原步骤的速率常数。
