{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,9]],"date-time":"2026-07-09T20:22:23Z","timestamp":1783628543777,"version":"3.55.0"},"reference-count":24,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2022,5,26]],"date-time":"2022-05-26T00:00:00Z","timestamp":1653523200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Ministry of Education of the Republic of Kazakhstan","award":["AP08856321"],"award-info":[{"award-number":["AP08856321"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>In this article, multiwalled carbon nanotubes (MWCNTs) have been synthesized on the surface of a diatomite mineral impregnated with transition metal salts using a propane-butane mixture in a chemical vapor deposition reactor at atmospheric pressure. The catalyst concentration and synthesis temperature have been varied in order to understand their effects on the formation of MWCNTs and their morphology. Diatomite was chosen as a catalyst carrier due to its elemental composition. It is mainly composed of amorphous silica, quartz and also contains such metals as Fe, K, Ca, Mn, Cr, Ti, and Zn, which makes it a promising material for use as a catalyst carrier when synthesizing carbon nanotubes (CNTs) by catalytic chemical vapor deposition (C-CVD). For the synthesis of carbon nanotubes by C-CVD on the surface of the diatomite, the following salts were used as a catalyst: CoCl2\u00b76H2O; Ni(NO3)2\u00b76H2O, and the concentrations of the solutions were 0.5; 1.0 and 1.5 M. Natural diatomite was characterized by X-ray diffraction analysis (XRD) and Scanning Electron Microscopy (SEM) analysis.<\/jats:p>","DOI":"10.3390\/nano12111817","type":"journal-article","created":{"date-parts":[[2022,5,29]],"date-time":"2022-05-29T23:43:03Z","timestamp":1653867783000},"page":"1817","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["The Use of Diatomite as a Catalyst Carrier for the Synthesis of Carbon Nanotubes"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3716-0476","authenticated-orcid":false,"given":"Meruyert","family":"Nazhipkyzy","sequence":"first","affiliation":[{"name":"Department of Chemical Physics and Material Science, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan"},{"name":"Institute of Combustion Problems, Almaty 050012, Kazakhstan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8782-703X","authenticated-orcid":false,"given":"Renata R.","family":"Nemkayeva","sequence":"additional","affiliation":[{"name":"National Nanotechnology Laboratory of Open Type, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Araylim","family":"Nurgain","sequence":"additional","affiliation":[{"name":"Department of Chemical Physics and Material Science, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aigerim R.","family":"Seitkazinova","sequence":"additional","affiliation":[{"name":"Department of Chemical Physics and Material Science, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Balaussa K.","family":"Dinistanova","sequence":"additional","affiliation":[{"name":"Department of Chemical Physics and Material Science, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan"},{"name":"Institute of Combustion Problems, Almaty 050012, Kazakhstan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Almagul T.","family":"Issanbekova","sequence":"additional","affiliation":[{"name":"Department of Geography and Environmental Sciences, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8047-916X","authenticated-orcid":false,"given":"Nurzhamal","family":"Zhylybayeva","sequence":"additional","affiliation":[{"name":"Institute of Combustion Problems, Almaty 050012, Kazakhstan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nurgul S.","family":"Bergeneva","sequence":"additional","affiliation":[{"name":"Department of Geography and Environmental Sciences, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8982-5257","authenticated-orcid":false,"given":"Gulnar U.","family":"Mamatova","sequence":"additional","affiliation":[{"name":"Department of Chemical Physics and Material Science, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,5,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"841","DOI":"10.1016\/j.cej.2011.05.038","article-title":"Fluidized bed synthesis of carbon nanotubes\u2014A review","volume":"171","author":"Dasgupta","year":"2011","journal-title":"J. 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