Solvothermal synthesis and characterization of anatase TiO2 nanocrystals with ultrahigh surface area
Phase-pure, ultrafine nanocrystalline anatase with high specific surface area (up to 250 m(2) g(-1)) was obtained upon injection of a titanium alkoxide precursor into ethanol with designed volume of water under mild solvothermal conditions (
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| Veröffentlicht in: | Journal of colloid and interface science 2006-10, Vol.302 (2), p.530-536 |
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| container_end_page | 536 |
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| container_issue | 2 |
| container_start_page | 530 |
| container_title | Journal of colloid and interface science |
| container_volume | 302 |
| creator | Wahi, Rajeev K Liu, Yunping Falkner, Joshua C Colvin, Vicki L |
| description | Phase-pure, ultrafine nanocrystalline anatase with high specific surface area (up to 250 m(2) g(-1)) was obtained upon injection of a titanium alkoxide precursor into ethanol with designed volume of water under mild solvothermal conditions ( |
| doi_str_mv | 10.1016/j.jcis.2006.07.003 |
| format | Article |
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Primary particle sizes were tuned by adjusting various reaction parameters, with the smallest grain sizes occurring at low temperatures (140-150 degrees C), low initial alkoxide concentrations, and intermediate hydrolysis ratios (r identical with[H2O]/[Ti(OR)4]=5-10). Additionally, variations in the reaction temperature result in changes in particle morphology and distribution, with high-temperature samples exhibiting bimodal distributions of small spherical and larger cubic particles that suggest grain growth via Ostwald ripening. A crystalline product with high thermal stability and specific surface area up to 5 times that of commercial nano-titania can be obtained at a relatively low temperature of 150 degrees C. 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Primary particle sizes were tuned by adjusting various reaction parameters, with the smallest grain sizes occurring at low temperatures (140-150 degrees C), low initial alkoxide concentrations, and intermediate hydrolysis ratios (r identical with[H2O]/[Ti(OR)4]=5-10). Additionally, variations in the reaction temperature result in changes in particle morphology and distribution, with high-temperature samples exhibiting bimodal distributions of small spherical and larger cubic particles that suggest grain growth via Ostwald ripening. A crystalline product with high thermal stability and specific surface area up to 5 times that of commercial nano-titania can be obtained at a relatively low temperature of 150 degrees C. The physical properties of the titania samples obtained in this study suggest they might be well suited for catalytic applications.</description><subject>Adsorption</subject><subject>Nanostructures - chemistry</subject><subject>Particle Size</subject><subject>Solvents - chemistry</subject><subject>Surface Properties</subject><subject>Temperature</subject><subject>Titanium - chemistry</subject><issn>0021-9797</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpFkEtPwzAQhH0A0VL4AxyQT9wS1knqxxFVvCSkHihna-s4xFWaFNsBlV-Pq1bitKPdmZH2I-SGQc6A8ftNvjEu5AUAz0HkAOUZmQIULFNCiQm5DGEDwNh8ri7IhHEplZBqSur3ofseYmv9Fjsa9n2SwQWKfU1Nix5NtN79YnRDT4cm7TFisHTllgXtsR-M34eIXaA_LrZ07KLH1n22NIy-QWMpeotX5LxJFnt9mjPy8fS4Wrxkb8vn18XDW2ZKYDFDKXkzn2PFpYAk15wXVcMUCKZKbABQMsGVKVWlbMkkL4S0vECbLnVZs3JG7o69Oz98jTZEvXXB2K7D3g5j0OnrSjCokrE4Go0fQvC20Tvvtuj3moE-8NQbfeCpDzw1CJ14ptDtqX1cb239HznBLP8AXXh1WA</recordid><startdate>20061015</startdate><enddate>20061015</enddate><creator>Wahi, Rajeev K</creator><creator>Liu, Yunping</creator><creator>Falkner, Joshua C</creator><creator>Colvin, Vicki L</creator><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20061015</creationdate><title>Solvothermal synthesis and characterization of anatase TiO2 nanocrystals with ultrahigh surface area</title><author>Wahi, Rajeev K ; Liu, Yunping ; Falkner, Joshua C ; Colvin, Vicki L</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c301t-a886f55a4687086fb6624f1907193af00a81769c3949e3186278e62ae00ad3d13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>Adsorption</topic><topic>Nanostructures - chemistry</topic><topic>Particle Size</topic><topic>Solvents - chemistry</topic><topic>Surface Properties</topic><topic>Temperature</topic><topic>Titanium - chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wahi, Rajeev K</creatorcontrib><creatorcontrib>Liu, Yunping</creatorcontrib><creatorcontrib>Falkner, Joshua C</creatorcontrib><creatorcontrib>Colvin, Vicki L</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of colloid and interface science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wahi, Rajeev K</au><au>Liu, Yunping</au><au>Falkner, Joshua C</au><au>Colvin, Vicki L</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Solvothermal synthesis and characterization of anatase TiO2 nanocrystals with ultrahigh surface area</atitle><jtitle>Journal of colloid and interface science</jtitle><addtitle>J Colloid Interface Sci</addtitle><date>2006-10-15</date><risdate>2006</risdate><volume>302</volume><issue>2</issue><spage>530</spage><epage>536</epage><pages>530-536</pages><issn>0021-9797</issn><abstract>Phase-pure, ultrafine nanocrystalline anatase with high specific surface area (up to 250 m(2) g(-1)) was obtained upon injection of a titanium alkoxide precursor into ethanol with designed volume of water under mild solvothermal conditions (<200 degrees C, 2 h). 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| source | MEDLINE; Elsevier ScienceDirect Journals |
| subjects | Adsorption Nanostructures - chemistry Particle Size Solvents - chemistry Surface Properties Temperature Titanium - chemistry |
| title | Solvothermal synthesis and characterization of anatase TiO2 nanocrystals with ultrahigh surface area |
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