Selective Oxidation of Glucose in the Presence of PVP-Protected Colloidal Gold Solutions
Selective Oxidation of Glucose in the Presence of PVP-Protected Colloidal Gold Solutions
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PVP 保护的胶体金溶液中葡萄糖的选择性氧化
DOI：
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发表时间：
2010
影响因子：
16.5
通讯作者：
Shi Lingling
中科院分区：
文献类型：
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作者：
Zou Xuhua;Liu Kezeng;Suo Zhanghuai;Yin Mingshan;Shi Lingling
在聚乙烯吡咯烷酮（PVP）稳定剂的存在下，通过还原氯金酸的碱溶液制备胶体金属金催化剂。研究了常压下以分子氧为氧化剂的水溶液中葡萄糖选择性氧化制葡萄糖酸的反应。测定了PVP用量和不同氯金酸浓度对胶体金活性的影响。在PVP/Au质量比为40、氯金酸浓度为100 μg/ml时，葡萄糖转化率最高，为54.4%。紫外-可见吸收光谱和透射电镜结果表明，稳定的金胶体含有较小的金纳米颗粒。在制备胶体金纳米颗粒时，调节PVP用量和氯金酸浓度可获得较高的葡萄糖氧化催化活性。
Colloidal metal gold catalysts were prepared by reducing a base solution of chlorauric acid in the presence of a polyvinylpyrrolidone(PVP) stabilizer.The selective oxidation of glucose to gluconic acid in aqueous solution using molecular oxygen as an oxidant at atmospheric pressure was studied.The activity of the colloidal gold was measured as a function of the PVP amount and various chlorauric acid concentrations.The highest activity with 54.4% conversion of glucose was obtained at a PVP/Au mass ratio of 40 and a 100 μg/ml chlorauric acid concentration.UV-Visible absorption spectroscopy and transmission electron microscopy results showed that the stable gold colloids contain smaller gold nanoparticles.Adjusting the PVP amount and chlorauric acid concentration in the preparation of colloidal gold nanoparticles can achieve high catalytic avtivity for glucose oxidation.