Microwave-assisted synthesis of TiO2 nanoparticles: photocatalytic activity of powders and thin films
A simple, rapid, and effective synthesis methodology for the preparation of high-performance TiO 2 nanoparticles and thin films by combining colloidal sol-gel and microwave-assisted hydrothermal synthesis was developed. The obtained results indicate that the heating with microwaves at 180 °C for 20 ...
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| Veröffentlicht in: | Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2018-02, Vol.20 (2), p.1-10, Article 23 |
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| creator | Falk, G. S. Borlaf, M. López-Muñoz, M. J. Fariñas, J. C. Rodrigues Neto, J. B. Moreno, R. |
| description | A simple, rapid, and effective synthesis methodology for the preparation of high-performance TiO
2
nanoparticles and thin films by combining colloidal sol-gel and microwave-assisted hydrothermal synthesis was developed. The obtained results indicate that the heating with microwaves at 180 °C for 20 min was enough to synthesize crystalline TiO
2
nanoparticles, presenting anatase as a major phase with a crystal size of ~ 7 nm and a specific surface area of 220 m
2
g
−1
. A secondary thermal treatment improved the crystallinity and induced the anatase-to-rutile transformation. The highest photocatalytic activity was found for the as-synthesized powder without any additional thermal treatment. Thin films were also prepared by dip-coating and its high photocatalytic activity showed a kinetic curve comparable to that of a thin film of commercial TiO
2
powder prepared under similar conditions. |
| doi_str_mv | 10.1007/s11051-018-4140-7 |
| format | Article |
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2
nanoparticles and thin films by combining colloidal sol-gel and microwave-assisted hydrothermal synthesis was developed. The obtained results indicate that the heating with microwaves at 180 °C for 20 min was enough to synthesize crystalline TiO
2
nanoparticles, presenting anatase as a major phase with a crystal size of ~ 7 nm and a specific surface area of 220 m
2
g
−1
. A secondary thermal treatment improved the crystallinity and induced the anatase-to-rutile transformation. The highest photocatalytic activity was found for the as-synthesized powder without any additional thermal treatment. Thin films were also prepared by dip-coating and its high photocatalytic activity showed a kinetic curve comparable to that of a thin film of commercial TiO
2
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2
nanoparticles and thin films by combining colloidal sol-gel and microwave-assisted hydrothermal synthesis was developed. The obtained results indicate that the heating with microwaves at 180 °C for 20 min was enough to synthesize crystalline TiO
2
nanoparticles, presenting anatase as a major phase with a crystal size of ~ 7 nm and a specific surface area of 220 m
2
g
−1
. A secondary thermal treatment improved the crystallinity and induced the anatase-to-rutile transformation. The highest photocatalytic activity was found for the as-synthesized powder without any additional thermal treatment. Thin films were also prepared by dip-coating and its high photocatalytic activity showed a kinetic curve comparable to that of a thin film of commercial TiO
2
powder prepared under similar conditions.</description><subject>Anatase</subject><subject>Catalytic activity</subject><subject>Characterization and Evaluation of Materials</subject><subject>Chemistry and Materials Science</subject><subject>Crystal structure</subject><subject>Crystallinity</subject><subject>Dip coatings</subject><subject>Heat treatment</subject><subject>Immersion coating</subject><subject>Inorganic Chemistry</subject><subject>Lasers</subject><subject>Materials Science</subject><subject>Microwaves</subject><subject>Nanoparticles</subject><subject>Nanotechnology</subject><subject>Optical Devices</subject><subject>Optics</subject><subject>Photocatalysis</subject><subject>Photonics</subject><subject>Physical Chemistry</subject><subject>Powder</subject><subject>Research Paper</subject><subject>Sol-gel processes</subject><subject>Synthesis</subject><subject>Thin films</subject><subject>Titanium dioxide</subject><issn>1388-0764</issn><issn>1572-896X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNp1kDtPwzAUhS0EEqXwA9gsMRt87SR22FDFSyrqUiQ2y0ls6ipNgu0W5d_jKgwsTPehc87V_RC6BnoLlIq7AEBzIBQkySCjRJygGeSCEVkWH6ep51ISKorsHF2EsKUUClayGTJvrvb9tz4YokNwIZoGh7GLG5MG3Fu8diuGO931g_bR1a0J93jY9LGvddTtmFZY19EdXByP8qH_bowPWHcNjhvXYevaXbhEZ1a3wVz91jl6f3pcL17IcvX8unhYkprnPJLMNkWWW6FFTillrCi5rKq6qEA2VoDNASouZE6N1syYggGnVckZ1MzySgOfo5spd_D9196EqLb93nfppIKy5JmUnGVJBZMqfR6CN1YN3u20HxVQdaSpJpoq0VRHmkokD5s8IWm7T-P_JP9r-gEAOHh-</recordid><startdate>20180201</startdate><enddate>20180201</enddate><creator>Falk, G. 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2
nanoparticles and thin films by combining colloidal sol-gel and microwave-assisted hydrothermal synthesis was developed. The obtained results indicate that the heating with microwaves at 180 °C for 20 min was enough to synthesize crystalline TiO
2
nanoparticles, presenting anatase as a major phase with a crystal size of ~ 7 nm and a specific surface area of 220 m
2
g
−1
. A secondary thermal treatment improved the crystallinity and induced the anatase-to-rutile transformation. The highest photocatalytic activity was found for the as-synthesized powder without any additional thermal treatment. Thin films were also prepared by dip-coating and its high photocatalytic activity showed a kinetic curve comparable to that of a thin film of commercial TiO
2
powder prepared under similar conditions.</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><doi>10.1007/s11051-018-4140-7</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0002-5954-7516</orcidid></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1388-0764 |
| ispartof | Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology, 2018-02, Vol.20 (2), p.1-10, Article 23 |
| issn | 1388-0764 1572-896X |
| language | eng |
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| source | Springer Nature - Complete Springer Journals |
| subjects | Anatase Catalytic activity Characterization and Evaluation of Materials Chemistry and Materials Science Crystal structure Crystallinity Dip coatings Heat treatment Immersion coating Inorganic Chemistry Lasers Materials Science Microwaves Nanoparticles Nanotechnology Optical Devices Optics Photocatalysis Photonics Physical Chemistry Powder Research Paper Sol-gel processes Synthesis Thin films Titanium dioxide |
| title | Microwave-assisted synthesis of TiO2 nanoparticles: photocatalytic activity of powders and thin films |
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