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The generation of abundant chemically accessible active hydroxyl groups in the cellulose fibril of MCC, facilitated by mild mechanochemical forces during the manual solid grinding of MCC and HAuCl\n                    <jats:sub>4<\/jats:sub>\n                    with NaOH, promotes the rapid deposition of gold NPs (2\u20135 nm) with loadings up to 4.6 wt% and increased dispersion within the MCC support. FTIR and XRD analyses reveal that gold chlorides substantially disrupt the intramolecular hydrogen bonding networks through metal-hydroxide interactions in the cellulose fibril structures of MCC, hence facilitating the efficient diffusion of gold NPs. The resulting MCC-supported gold NPs (Au\/MCC) were evaluated as catalysts for oxidative homocoupling of phenylboronic acids (PBA) and aerobic oxidation of alcohols. The catalytic studies show that the active hydroxyl groups in the cellulose fibril not only coordinate with the gold, but also synergistically improve the rapid conversion of PBA into biphenyl and oxidation of alcohols into corresponding aldehydes and ketones with greater selectivity.\n                  <\/jats:p>","DOI":"10.1088\/1361-6528\/ae9728","type":"journal-article","created":{"date-parts":[[2026,8,10]],"date-time":"2026-08-10T09:47:18Z","timestamp":1786355238000},"page":"345602","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Preparation of gold nanoparticles supported on microcrystalline cellulose by solid-mortar grinding and their catalytic activities"],"prefix":"10.1088","volume":"37","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-6997-2858","authenticated-orcid":true,"given":"Nasar Nafeesa","family":"Thaslim","sequence":"first","affiliation":[{"name":"University of Madras, Guindy Campus"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3625-4243","authenticated-orcid":true,"given":"Selvaraju","family":"Chellappan","sequence":"additional","affiliation":[{"name":"University of Madras"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3473-9914","authenticated-orcid":true,"given":"Arumugam","family":"Murugadoss","sequence":"additional","affiliation":[{"name":"University of Madras, Guindy Campus"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"266","published-online":{"date-parts":[[2026,8,27]]},"reference":[{"key":"nanoae9728bib1","doi-asserted-by":"publisher","first-page":"11575","DOI":"10.1021\/acs.chemrev.7b00627","type":"journal-article","article-title":"Nanocellulose, a versatile green platform: from biosources to materials and their applications","volume":"118","author":"Thomas","year":"2018","journal-title":"Chem. 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All rights, including for text and data mining, AI training, and similar technologies, are reserved.","name":"copyright_information","label":"Copyright Information"},{"value":"2026-05-28","name":"date_received","label":"Date Received","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2026-08-07","name":"date_accepted","label":"Date Accepted","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2026-08-27","name":"date_epub","label":"Online publication date","group":{"name":"publication_dates","label":"Publication dates"}}]}}