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The preparation is carried out under the mild conditions of 333\u2005K and 20\u2005MPa. The high aspect ratio of the used GO sheets (ca.\u200530\u2005\u03bcm lateral dimensions) allowed the preparation of aerogel monoliths by simultaneous scCO<jats:sub>2<\/jats:sub> gelation and drying. Solid\u2010state characterization results indicate that a thermally\u2010stable mesoporous non\u2010reduced GO aerogel was obtained by using the supercritical procedure, keeping most of the surface oxygenated groups on the GO sheets, thus, facilitating further functionalization. Moreover, the monoliths have a very low density, high specific surface area, and excellent mechanical integrity; characteristics which rival those of most light\u2010weight reduced graphene aerogels reported in the literature.<\/jats:p>","DOI":"10.1002\/chem.201803368","type":"journal-article","created":{"date-parts":[[2018,8,8]],"date-time":"2018-08-08T15:08:43Z","timestamp":1533740923000},"page":"15903-15911","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":23,"title":["Preparation and Characterization of Graphene Oxide Aerogels: Exploring the Limits of Supercritical CO<sub>2<\/sub> Fabrication Methods"],"prefix":"10.1002","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0725-421X","authenticated-orcid":false,"given":"Alejandro","family":"Borr\u00e1s","sequence":"first","affiliation":[{"name":"Instituto de Ciencia de Materiales de Barcelona (ICMAB-CSIC) Campus UAB  08193 Bellaterra Spain"}]},{"given":"Gil","family":"Gon\u00e7alves","sequence":"additional","affiliation":[{"name":"Instituto de Ciencia de Materiales de Barcelona (ICMAB-CSIC) Campus UAB  08193 Bellaterra Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8387-3282","authenticated-orcid":false,"given":"Gregorio","family":"Marb\u00e1n","sequence":"additional","affiliation":[{"name":"Instituto Nacional del Carb\u00f3n (CSIC)  c\/ Francisco Pintado Fe\u200526 33011 Oviedo Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0050-7501","authenticated-orcid":false,"given":"Stefania","family":"Sandoval","sequence":"additional","affiliation":[{"name":"Instituto de Ciencia de Materiales de Barcelona (ICMAB-CSIC) Campus UAB  08193 Bellaterra Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2658-1045","authenticated-orcid":false,"given":"Susana","family":"Pinto","sequence":"additional","affiliation":[{"name":"Mechanical Engineering Department Centre for Mechanical Technology and Automation (TEMA) University of Aveiro  310-193 Aveiro Portugal"}]},{"given":"Paula A. 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