One-step synthesis of poly(ethyleneglycol dimethacrylate)-microspheres-supported nano-Au catalyst in methanol–water solution under γ-ray radiation
作者:Jinxing Chen、Feng Chen、Yiyao Wang、Mozhen Wang、Qichao Wu、Xiao Zhou、Xuewu Ge
DOI:10.1039/c6ra09166k
日期:——
dispersed stably in both water and organic solvent, CH3CN. They exhibit excellent catalytic efficiency not only on the reduction of Fe(CN)63− by NaBH4 in aqueous solution, but also on the cis–trans isomerization of azobenzenes in CH3CN at room temperature. A satisfactory repeatability of the catalytic performance of the prepared PEGDMA@AuNP microspheres was achieved in organic solvents. This work opens a
通过在室温和环境压力下通过一步合成方法成功地制备了亚微米尺寸的高度交联的聚乙二醇二甲基丙烯酸乙二醇酯(PEGDMA)微球负载纳米金催化剂(PEGDMA @ AuNP)。射线辐射作用于简单的一锅系统,即含有EGDMA,4-VP和HAuCl 4的甲醇水溶液。电子显微镜,XPS和XRD分析证明了几纳米的AuNP已经合成并用时所吸附的剂量率和的HAuCl的初始浓度交联的微球PEGDMA的形成同时加载4被一个窄的范围内控制的,即35-80 Gy min -1和低于1 mmol L[HAuCl 4 ]的-1。所制备的PEGDMA @ AuNP微球的尺寸随剂量率变化很小,但随初始的[HAuCl 4 ]减小,从0.1 mmol L -1的900 nm降至1 mmol L -1的680 nm。与此同时,与初始的AuNP增加[的HAuCl大小4 ],从8纳米处0.1毫摩尔大号-1至35nm在1毫摩尔大号-1。制备的PEGDMA