Selective Oxidation of Glucose in the Presence of PVP-Protected Colloidal Gold Solutions

Abstract

Abstract: 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.

Key words: colloidal gold catalyst, polyvinylpyrrolidone stabilizer, glucose, molecular oxygen, liquid selective oxidation

SHI Lingling;LIU Kezeng;ZOU Xuhua;JIN Mingshan;SUO Zhanghuai*. Selective Oxidation of Glucose in the Presence of PVP-Protected Colloidal Gold Solutions[J]. Chinese Journal of Catalysis, 2010, 31(6): 661-665.

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https://www.cjcatal.com/EN/Y2010/V31/I6/661

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Selective Oxidation of Glucose in the Presence of PVP-Protected Colloidal Gold Solutions

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