SiO2 capsulized Cu active nanoparticles: synthesis and activity study
SiO2 capsulized Cu active nanoparticles: synthesis and activity study
复制标题
DOI：
10.1039/c3ta11281k
复制
发表时间：
2013-06
影响因子：
--
通讯作者：
Yan Zhao;Jing-zhe Zhao;Zhaohong Su;Xinli Hao;Yawen Li;Na Li;Yunling Li
中科院分区：
文献类型：
--
作者：
Yan Zhao;Jing-zhe Zhao;Zhaohong Su;Xinli Hao;Yawen Li;Na Li;Yunling Li
在弱酸性溶液中合成了铜活性纳米粒子（CuANPs）以保持其催化活性。SiO2胶囊被设计成使Cu ANP与氧化隔离。SiO2胶囊与Cu ANPs之间的弱相互作用确保了所设计的纳米颗粒具有良好的抗氧化性能和潜在的高活性。SiO_2包覆层越厚，抗氧化性越强（Cus3 > Cus2 > Cus1），对氧的反应活性顺序为（Cus1 = Cus2 > Cus3），表明SiO_2包覆层厚度适当（Cus2）的Cu纳米粒具有最佳的应用前景。通过使用样品构建非酶传感器，检测到的活性对葡萄糖的电催化氧化证实了这一结论。SiO2胶囊的开裂恢复了Cu ANPs在催化高氯酸铵（AP）分解过程中的活性。加入1.5%的Cu纳米颗粒后，AP的高温分解温度降低了184.2 °C。
Cu active nanoparticles (Cu ANPs) were synthesized in weakly acidic solution to preserve their catalytic activity. SiO2 capsules were designed to insulate Cu ANPs from oxidation. The weak interaction between SiO2 capsules and Cu ANPs ensured that the designed nanoparticles had good anti-oxidation property and potentially high activity. The increased anti-oxidation property with thicker SiO2 capsules (Cus3 > Cus2 > Cus1) and the order of reactivity to oxygen (Cus1 = Cus2 > Cus3) showed that Cu ANPs with SiO2 capsules (Cus2) of appropriate thickness would be the best for application. By using the samples to construct non-enzymatic sensors, the detected activity toward electro-catalytic oxidation of glucose confirmed this conclusion. Dehiscence of SiO2 capsules recovered the activity of the Cu ANPs in the catalytic ammonium perchlorate (AP) decomposition process. With the addition of 1.5% of Cu ANPs, the high temperature decomposition of AP decreased by 184.2 °C.