Coagulation of aqueous nanodisperse graphite suspensions in the presence of multivalent ions
The results of the study of the coagulation kinetics of graphite nanoparticle suspensions in aqueous AlCl3 and Th(NO3)4 electrolytes are presented. Electro-optical effects in disperse systems containing graphite particles allow to reliably investigate the coagulation kinetics in such systems. A meth...
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| Veröffentlicht in: | Diamond and related materials 2020-01, Vol.101, p.107599, Article 107599 |
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| creator | Petrov, M.P. Vezo, O.S. Trusov, A.A. Voitylov, A.V. Vojtylov, V.V. |
| description | The results of the study of the coagulation kinetics of graphite nanoparticle suspensions in aqueous AlCl3 and Th(NO3)4 electrolytes are presented. Electro-optical effects in disperse systems containing graphite particles allow to reliably investigate the coagulation kinetics in such systems. A method based on the analysis of changes of electro-optical effect relaxation dependencies in the process of coagulation was developed. The dependencies of the electrokinetic potential on the concentration of electrolytes are presented. Coagulation in such systems is observed if electrokinetic potential of graphite particles does not exceed 5 mV. At the isoelectric point, the fast coagulation theory is in good agreement with the observed processes of formation of aggregates from graphite particles. The conducted studies confirm the conclusion that the formation of aggregates from graphite particles with lyophobic surface is mainly influenced by the valence of the ions that determine the surface charge, and their other characteristics are of secondary importance.
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•Aqueous graphite colloid with particle size 20–400 nm was studied.•Coagulation kinetics of graphite nanoparticles at isoelectric point were studied using electro-optic technique.•The influence of multivalent salts AlCl3 and Th(NO3)4 is studied, compared and discussed.•At the isoelectric point, the formation rate of pair aggregates from particles corresponds to the theory of fast coagulation. |
| doi_str_mv | 10.1016/j.diamond.2019.107599 |
| format | Article |
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[Display omitted]
•Aqueous graphite colloid with particle size 20–400 nm was studied.•Coagulation kinetics of graphite nanoparticles at isoelectric point were studied using electro-optic technique.•The influence of multivalent salts AlCl3 and Th(NO3)4 is studied, compared and discussed.•At the isoelectric point, the formation rate of pair aggregates from particles corresponds to the theory of fast coagulation.</description><identifier>ISSN: 0925-9635</identifier><identifier>EISSN: 1879-0062</identifier><identifier>DOI: 10.1016/j.diamond.2019.107599</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>(D) System dynamics ; Aggregates ; Aluminum chloride ; Coagulation ; Electro-optical effect ; Electro-optical properties ; Electrokinetic potential ; Electrokinetics ; Electrolytes ; Graphite ; Kinetics ; Nanographite ; Nanoparticles ; Surface charge</subject><ispartof>Diamond and related materials, 2020-01, Vol.101, p.107599, Article 107599</ispartof><rights>2019 Elsevier B.V.</rights><rights>Copyright Elsevier BV Jan 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c376t-2dafa317c87fcf141f3ce8021d05054b7d626fc01b2ec8194e8a8a2e46759acf3</citedby><cites>FETCH-LOGICAL-c376t-2dafa317c87fcf141f3ce8021d05054b7d626fc01b2ec8194e8a8a2e46759acf3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0925963519304522$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3536,27903,27904,65309</link.rule.ids></links><search><creatorcontrib>Petrov, M.P.</creatorcontrib><creatorcontrib>Vezo, O.S.</creatorcontrib><creatorcontrib>Trusov, A.A.</creatorcontrib><creatorcontrib>Voitylov, A.V.</creatorcontrib><creatorcontrib>Vojtylov, V.V.</creatorcontrib><title>Coagulation of aqueous nanodisperse graphite suspensions in the presence of multivalent ions</title><title>Diamond and related materials</title><description>The results of the study of the coagulation kinetics of graphite nanoparticle suspensions in aqueous AlCl3 and Th(NO3)4 electrolytes are presented. Electro-optical effects in disperse systems containing graphite particles allow to reliably investigate the coagulation kinetics in such systems. A method based on the analysis of changes of electro-optical effect relaxation dependencies in the process of coagulation was developed. The dependencies of the electrokinetic potential on the concentration of electrolytes are presented. Coagulation in such systems is observed if electrokinetic potential of graphite particles does not exceed 5 mV. At the isoelectric point, the fast coagulation theory is in good agreement with the observed processes of formation of aggregates from graphite particles. The conducted studies confirm the conclusion that the formation of aggregates from graphite particles with lyophobic surface is mainly influenced by the valence of the ions that determine the surface charge, and their other characteristics are of secondary importance.
[Display omitted]
•Aqueous graphite colloid with particle size 20–400 nm was studied.•Coagulation kinetics of graphite nanoparticles at isoelectric point were studied using electro-optic technique.•The influence of multivalent salts AlCl3 and Th(NO3)4 is studied, compared and discussed.•At the isoelectric point, the formation rate of pair aggregates from particles corresponds to the theory of fast coagulation.</description><subject>(D) System dynamics</subject><subject>Aggregates</subject><subject>Aluminum chloride</subject><subject>Coagulation</subject><subject>Electro-optical effect</subject><subject>Electro-optical properties</subject><subject>Electrokinetic potential</subject><subject>Electrokinetics</subject><subject>Electrolytes</subject><subject>Graphite</subject><subject>Kinetics</subject><subject>Nanographite</subject><subject>Nanoparticles</subject><subject>Surface charge</subject><issn>0925-9635</issn><issn>1879-0062</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqFkEtLAzEUhYMoWKs_QQi4nprHvLISKb6g4EZ3QkgzN22GaTImmYL_3gx17-rC5Zxz7_kQuqVkRQmt7_tVZ9XBu27FCBV511RCnKEFbRtREFKzc7QgglWFqHl1ia5i7AmhTJR0gb7WXu2mQSXrHfYGq-8J_BSxU853No4QIuBdUOPeJsBxyhsXszZi63DaAx4DRHAaZvNhGpI9qgFcwrPmGl0YNUS4-ZtL9Pn89LF-LTbvL2_rx02heVOngnXKKE4b3TZGG1pSwzW0hNGOVKQqt01Xs9poQrcMdEtFCa1qFYOyzkWVNnyJ7k65Y_D5_5hk76fg8knJeFVyInjZZlV1UungYwxg5BjsQYUfSYmcQcpe_oGUM0h5Apl9Dycf5ApHC0FGbefKnQ2gk-y8_SfhF0TpgKE</recordid><startdate>202001</startdate><enddate>202001</enddate><creator>Petrov, M.P.</creator><creator>Vezo, O.S.</creator><creator>Trusov, A.A.</creator><creator>Voitylov, A.V.</creator><creator>Vojtylov, V.V.</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>202001</creationdate><title>Coagulation of aqueous nanodisperse graphite suspensions in the presence of multivalent ions</title><author>Petrov, M.P. ; Vezo, O.S. ; Trusov, A.A. ; Voitylov, A.V. ; Vojtylov, V.V.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c376t-2dafa317c87fcf141f3ce8021d05054b7d626fc01b2ec8194e8a8a2e46759acf3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>(D) System dynamics</topic><topic>Aggregates</topic><topic>Aluminum chloride</topic><topic>Coagulation</topic><topic>Electro-optical effect</topic><topic>Electro-optical properties</topic><topic>Electrokinetic potential</topic><topic>Electrokinetics</topic><topic>Electrolytes</topic><topic>Graphite</topic><topic>Kinetics</topic><topic>Nanographite</topic><topic>Nanoparticles</topic><topic>Surface charge</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Petrov, M.P.</creatorcontrib><creatorcontrib>Vezo, O.S.</creatorcontrib><creatorcontrib>Trusov, A.A.</creatorcontrib><creatorcontrib>Voitylov, A.V.</creatorcontrib><creatorcontrib>Vojtylov, V.V.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Diamond and related materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Petrov, M.P.</au><au>Vezo, O.S.</au><au>Trusov, A.A.</au><au>Voitylov, A.V.</au><au>Vojtylov, V.V.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Coagulation of aqueous nanodisperse graphite suspensions in the presence of multivalent ions</atitle><jtitle>Diamond and related materials</jtitle><date>2020-01</date><risdate>2020</risdate><volume>101</volume><spage>107599</spage><pages>107599-</pages><artnum>107599</artnum><issn>0925-9635</issn><eissn>1879-0062</eissn><abstract>The results of the study of the coagulation kinetics of graphite nanoparticle suspensions in aqueous AlCl3 and Th(NO3)4 electrolytes are presented. Electro-optical effects in disperse systems containing graphite particles allow to reliably investigate the coagulation kinetics in such systems. A method based on the analysis of changes of electro-optical effect relaxation dependencies in the process of coagulation was developed. The dependencies of the electrokinetic potential on the concentration of electrolytes are presented. Coagulation in such systems is observed if electrokinetic potential of graphite particles does not exceed 5 mV. At the isoelectric point, the fast coagulation theory is in good agreement with the observed processes of formation of aggregates from graphite particles. The conducted studies confirm the conclusion that the formation of aggregates from graphite particles with lyophobic surface is mainly influenced by the valence of the ions that determine the surface charge, and their other characteristics are of secondary importance.
[Display omitted]
•Aqueous graphite colloid with particle size 20–400 nm was studied.•Coagulation kinetics of graphite nanoparticles at isoelectric point were studied using electro-optic technique.•The influence of multivalent salts AlCl3 and Th(NO3)4 is studied, compared and discussed.•At the isoelectric point, the formation rate of pair aggregates from particles corresponds to the theory of fast coagulation.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.diamond.2019.107599</doi></addata></record> |
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| subjects | (D) System dynamics Aggregates Aluminum chloride Coagulation Electro-optical effect Electro-optical properties Electrokinetic potential Electrokinetics Electrolytes Graphite Kinetics Nanographite Nanoparticles Surface charge |
| title | Coagulation of aqueous nanodisperse graphite suspensions in the presence of multivalent ions |
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