Gold nanoparticle-decorated diatom biosilica: A favorable catalyst for the oxidation of d-glucose

Fischer C, Adam M, Mueller AC, Sperling E, Wustmann M, Van Pee KH, Kaskel S, Brunner E (2016)

Publication Type: Journal article

Publication year: 2016

Journal

ACS Omega American Chemical Society: Open Access Titles / American Chemical Society

Book Volume: 1

Pages Range: 1253-1261

Journal Issue: 6

DOI: 10.1021/acsomega.6b00406

Abstract

Diatoms are unicellular algae of enormous biodiversity that occur in all water habitats on earth. Their cell walls are composed of amorphous biosilica and exhibit species-specific nanoporous to microporous and macroporous patterning. Therefore, diatom biosilica is a promising renewable material for various applications, such as in catalysis, drug-delivery systems, and biophotonics. In this study, diatom biosilica of three different species (Stephanopyxis turris, Eucampia zodiacus, and Thalassiosira pseudonana) was used as support material for gold nanoparticles using a covalent coupling method. The resulting catalysts were applied for the oxidation of D-glucose to D-gluconic acid. Because of its high specific surface area, well-established transport pores, and the presence of small, homogeneously distributed gold nanoparticles on the surface, diatom biosilica provides a highly catalytically active surface and advanced accessibility to the active sites. In comparison to those of the used reference supports, higher catalytic activities (up to 3.28 × 10−4 mmolGlc s−1 mgAu−1 for T. pseudonana biosilica) and slower deactivation were observed for two of the diatom biosilica materials. In addition, diatom biosilica showed very high gold-loading capacities (up to 45 wt %), with a homogeneous nano article distribution.

Involved external institutions

Technische Universität Dresden DE Germany (DE)

How to cite

APA:

Fischer, C., Adam, M., Mueller, A.C., Sperling, E., Wustmann, M., Van Pee, K.-H.,... Brunner, E. (2016). Gold nanoparticle-decorated diatom biosilica: A favorable catalyst for the oxidation of d-glucose. ACS Omega, 1(6), 1253-1261. https://doi.org/10.1021/acsomega.6b00406

MLA:

Fischer, Cathleen, et al. "Gold nanoparticle-decorated diatom biosilica: A favorable catalyst for the oxidation of d-glucose." ACS Omega 1.6 (2016): 1253-1261.

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