Chitosan-starch biopolymer modified kaolin supported Pd nanoparticles for the oxidative esterification of aryl aldehydes

Veisi H., Ebrahimi Z., Karmakar B., Joshani Z., Öztürk T.

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, vol.191, pp.465-473, 2021 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 191
  • Publication Date: 2021
  • Doi Number: 10.1016/j.ijbiomac.2021.09.106
  • Journal Name: INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Chemical Abstracts Core, EMBASE, Food Science & Technology Abstracts, INSPEC, MEDLINE, Veterinary Science Database
  • Page Numbers: pp.465-473
  • Keywords: Biopolymer, Pd nanoparticles, Esterification of aldehydes, IRON-OXIDE NANOPARTICLES, CATALYTIC-REDUCTION, GREEN SYNTHESIS, RECYCLABLE NANOCATALYST, HETEROGENEOUS CATALYST, SILVER NANOPARTICLES, EFFICIENT CATALYST, ALCOHOLS, EXTRACT, 4-NITROPHENOL
  • Istanbul Technical University Affiliated: Yes

Abstract

A mild and efficient green protocol has been disclosed for selective oxidative esterification of various aldehydes over a novel Pd fabricated chitosan-starch polyplex encapsulated Kaolin (Kaolin@CS-starch-Pd) as a heterogeneous and reusable biocompatible nanocatalyst. Molecular oxygen was used as an oxidizing agent to generate water as the sole by-product. A wide variety of aldehydes was converted to their methyl esters in high yields. The process involved gentle reaction conditions to avoid any type of pre-activation. Structural features of the catalyst were determined through FT-IR, FE-SEM, TEM, EDX, elemental mapping, XRD and ICP-OES analyses. The material was found to be stable enough toward Pd leaching. Durability of Kaolin@CS-starch-Pd was further justified by retaining its catalytic activity through successful reusability for several times.