{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,9]],"date-time":"2026-08-09T17:55:18Z","timestamp":1786298118295,"version":"build-2736575974"},"reference-count":59,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2021,12,4]],"date-time":"2021-12-04T00:00:00Z","timestamp":1638576000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001655","name":"German Academic Exchange Service","doi-asserted-by":"publisher","award":["57507442"],"award-info":[{"award-number":["57507442"]}],"id":[{"id":"10.13039\/501100001655","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100006595","name":"Unitatea Executiva Pentru Finantarea Invatamantului Superior a Cercetarii Dezvoltarii si Inovarii","doi-asserted-by":"publisher","award":["PN-III-P1-1.2-PCCDI-2017-0387\/80PCCDI"],"award-info":[{"award-number":["PN-III-P1-1.2-PCCDI-2017-0387\/80PCCDI"]}],"id":[{"id":"10.13039\/501100006595","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>The combination of layered double hydroxides (LDH) with graphene oxide (GO) enables the formation of nanohybrids with improved properties. This work focuses on the structural and catalytic properties of Ce-containing MgAl LDH-GO composites bearing different concentrations of GO in the range of 5\u201325 wt.%. The synthesis of the composites was performed by co-precipitating the LDH phase in the presence of GO, while their characterization was performed using XRF, XRD, DRIFT, Raman, SEM, nitrogen adsorption-desorption, and acidity-basicity measurements. The LDH-GO composites, showing redox, basic, and acid catalytic functions, were tested in two different types of organic transformations: (i) Knoevenagel condensation and (ii) one-pot cascade oxidation-Knoevenagel condensation. (i) The cinnamic acid was synthesized by the Knoevenagel condensation of benzaldehyde with diethylmalonate. The composites showed catalytic performances in strong contrast to neat LDH or GO, suggesting a synergistic interaction between the two components. During Knoevenagel condensation, the catalytic activity increased with the GO content in the hybrids up to 15 wt.% and decreased afterwards. (ii) 2-Benzoyl-3-phenylacrylonitrile was synthesized by the aerobic oxidation of benzyl alcohol followed by the Knoevenagel condensation with benzoyl acetonitrile using three different non-polar solvents, i.e., toluene, benzene, and mesitylene. The conversion of benzyl alcohol was higher for the hybrid materials compared to the individual components but decreased with the increase of the graphene oxide concentration.<\/jats:p>","DOI":"10.3390\/ma14237457","type":"journal-article","created":{"date-parts":[[2021,12,5]],"date-time":"2021-12-05T21:01:45Z","timestamp":1638738105000},"page":"7457","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Ce-Containing MgAl-Layered Double Hydroxide-Graphene Oxide Hybrid Materials as Multifunctional Catalysts for Organic Transformations"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3201-5904","authenticated-orcid":false,"given":"Alexandra-Elisabeta","family":"Stamate","sequence":"first","affiliation":[{"name":"Department of Organic Chemistry, Biochemistry & Catalysis, Faculty of Chemistry, University of Bucharest, 4-12, Blv. Regina Elisabeta, 030018 Bucharest, Romania"},{"name":"Research Center for Catalysts & Catalytic Processes, Faculty of Chemistry, University of Bucharest, 4-12, Blv. Regina Elisabeta, 030018 Bucharest, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6466-651X","authenticated-orcid":false,"given":"Octavian Dumitru","family":"Pavel","sequence":"additional","affiliation":[{"name":"Department of Organic Chemistry, Biochemistry & Catalysis, Faculty of Chemistry, University of Bucharest, 4-12, Blv. Regina Elisabeta, 030018 Bucharest, Romania"},{"name":"Research Center for Catalysts & Catalytic Processes, Faculty of Chemistry, University of Bucharest, 4-12, Blv. Regina Elisabeta, 030018 Bucharest, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1271-9955","authenticated-orcid":false,"given":"Rodica","family":"Z\u0103voianu","sequence":"additional","affiliation":[{"name":"Department of Organic Chemistry, Biochemistry & Catalysis, Faculty of Chemistry, University of Bucharest, 4-12, Blv. Regina Elisabeta, 030018 Bucharest, Romania"},{"name":"Research Center for Catalysts & Catalytic Processes, Faculty of Chemistry, University of Bucharest, 4-12, Blv. Regina Elisabeta, 030018 Bucharest, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ioana","family":"Breze\u015ftean","sequence":"additional","affiliation":[{"name":"National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat, 400293 Cluj-Napoca, Romania"},{"name":"Biomolecular Physics Department, Faculty of Physics, Babes-Bolyai University, 1, Kog\u0103lniceanu Str., 400084 Cluj-Napoca, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2991-3957","authenticated-orcid":false,"given":"Alexandra","family":"Cior\u020b\u021b\u0103","sequence":"additional","affiliation":[{"name":"National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat, 400293 Cluj-Napoca, Romania"},{"name":"Electron Microscopy Centre, Faculty of Biology and Geology, Babes-Bolyai University, 44, Republicii Str., 400015 Cluj-Napoca, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9607-9507","authenticated-orcid":false,"given":"Ruxandra","family":"B\u020brjega","sequence":"additional","affiliation":[{"name":"National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Street, P.O. Box MG-16, 077125 M\u0103gurele, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-0301-8811","authenticated-orcid":false,"given":"Katja","family":"Neubauer","sequence":"additional","affiliation":[{"name":"Leibniz Institute for Catalysis (LIKAT Rostock), Albert-Einstein-Stra\u00dfe 29a, 18059 Rostock, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Angela","family":"Koeckritz","sequence":"additional","affiliation":[{"name":"Leibniz Institute for Catalysis (LIKAT Rostock), Albert-Einstein-Stra\u00dfe 29a, 18059 Rostock, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8381-2076","authenticated-orcid":false,"given":"Ioan-Cezar","family":"Marcu","sequence":"additional","affiliation":[{"name":"Department of Organic Chemistry, Biochemistry & Catalysis, Faculty of Chemistry, University of Bucharest, 4-12, Blv. Regina Elisabeta, 030018 Bucharest, Romania"},{"name":"Research Center for Catalysts & Catalytic Processes, Faculty of Chemistry, University of Bucharest, 4-12, Blv. Regina Elisabeta, 030018 Bucharest, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,12,4]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"332","DOI":"10.1007\/s40820-015-0047-3","article-title":"One-pot microwave-assisted synthesis of graphene\/layered double hydroxide (LDH) nanohybrids","volume":"7","author":"Lonkar","year":"2015","journal-title":"Nano-Micro Lett."},{"key":"ref_2","unstructured":"Nocchetti, M., and Costantino, U. (2022). Recent Innovative Developments of Layered Double Hydroxide-Based Hybrids and Nanocomposite Catalysts. 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