Autogenic synthesis cum 3D-assembly of small ultra-catalytic nanoparticles on intact eggshell as resilient portable megacatalyst

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Published Sep 9, 2021
Chandra Shekhar Bhatt Chandra Shekhar

Abstract

Metal nanoparticles anchored within inert and porous natural supports are emerging as safe and sustainable catalytic platforms for heterogeneous catalysis [1]. We develop metal nanoparticles grafted 3D-megacatalyst (~80 cm2) by exploiting reductive potential of free-standing hydroxyl groups within proteinaceous surface of intact eggshell. Natural assembly of small gold nanoparticles (9±3 nm) throughout eggshells surface is one-step reduction cum stabilization phenomenon. This novel strategy imparts wide catalytic support area, stability to the megacatalyst for various liquid-phase ultra-efficient catalysis. As a proof-of-concept, we demonstrate three eclectic reactions including, large-volume degradations of organic and sewage-dyes, transesterification of used seed-oil and hydrogenation of nitroarenes at gram-scale. Moreover, the organically layered massive structure of our catalyst allowed acid-recovery of gold precursor post-poisoning to regenerate a new megacatalyst [2]. Our rationale, naturally created, stable, ultra-cheap, zero-maintenance, reusable, hand-removable, resilient megacatalyst developed from left-over food-waste trounces majority of the existing challenges while utilizing nano-based catalysts for heterogeneous catalysis.

How to Cite

Chandra Shekhar, C. S. B. (2021). Autogenic synthesis cum 3D-assembly of small ultra-catalytic nanoparticles on intact eggshell as resilient portable megacatalyst. SPAST Abstracts, 1(01). Retrieved from https://spast.org/techrep/article/view/232
Abstract 14 |

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Keywords

supported-catalyst, biomatrix, environmentally green, hand-recyclable, gram-scale, sewage-dyes, bio-waste, resource management, hydrogenation, biodiesel, sustainable,, natural, facile, one-step, bio-template

References
[1] M Sankar, M. et al. Role of the Support in Gold-Containing Nanoparticles as Heterogeneous Catalysts. Chem. Rev. 120, 3890–3938 (2020).
[2] Fernandes, A. B. et al. Recoverable and Reusable Polymer Microbead-Supported Metal Nanocatalysts for Redox Chemical Transformations. ACS Appl. Nano Mater. (2020) doi:10.1021/acsanm.9b02433.
Section
GM2- Microsystems & Nanotechnology