Anisotropic Metal Deposition on TiO2 Particles by Electric‐Field‐Induced Charge Separation
Deposition of metals on TiO2 semiconductor particles (M‐TiO2) results in hybrid Janus objects combining the properties of both materials. One of the techniques proposed to generate Janus particles is bipolar electrochemistry (BPE). The concept can be applied in a straightforward way for the site‐sel...
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| Veröffentlicht in: | Angewandte Chemie International Edition 2017-09, Vol.56 (38), p.11431-11435 |
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| creator | Tiewcharoen, Supakit Warakulwit, Chompunuch Lapeyre, Veronique Garrigue, Patrick Fourier, Lucas Elissalde, Catherine Buffière, Sonia Legros, Philippe Gayot, Marion Limtrakul, Jumras Kuhn, Alexander |
| description | Deposition of metals on TiO2 semiconductor particles (M‐TiO2) results in hybrid Janus objects combining the properties of both materials. One of the techniques proposed to generate Janus particles is bipolar electrochemistry (BPE). The concept can be applied in a straightforward way for the site‐selective modification of conducting particles, but is much less obvious to use for semiconductors. Herein we report the bulk synthesis of anisotropic M‐TiO2 particles based on the synergy of BPE and photochemistry, allowing the intrinsic limitations, when they are used separately, to be overcome. When applying electric fields during irradiation, electrons and holes can be efficiently separated, thus breaking the symmetry of particles by modifying them selectively and in a wireless way on one side with either gold or platinum. Such hybrid materials are an important first step towards high‐performance designer catalyst particles, for example for photosplitting of water.
Taking sides: The bulk synthesis of anisotropic metal–TiO2 particles is possible through the synergy of bipolar electrochemistry and photochemistry. Bipolar behavior is induced in isotropic semiconductor particles suspended in a gel, allowing metal deposition to generate Janus nanoparticles. |
| doi_str_mv | 10.1002/anie.201704393 |
| format | Article |
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Taking sides: The bulk synthesis of anisotropic metal–TiO2 particles is possible through the synergy of bipolar electrochemistry and photochemistry. Bipolar behavior is induced in isotropic semiconductor particles suspended in a gel, allowing metal deposition to generate Janus nanoparticles.</description><subject>bipolar electrochemistry</subject><subject>Catalysts</subject><subject>Chemical Sciences</subject><subject>Deposition</subject><subject>Electric charge</subject><subject>Electric fields</subject><subject>Electrochemistry</subject><subject>Electronics industry</subject><subject>Gold</subject><subject>Heavy metals</subject><subject>Irradiation</subject><subject>Janus particles</subject><subject>Material chemistry</subject><subject>metal deposition</subject><subject>Nanoparticles</subject><subject>Photochemistry</subject><subject>Platinum</subject><subject>Pollutant deposition</subject><subject>Radiation</subject><subject>Titanium dioxide</subject><issn>1433-7851</issn><issn>1521-3773</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNpdkctKAzEUhgdR8Lp1PeBGF9VcmkmyLLVqoVrBujVkkjMaiTNjMlW68xF8Rp_EDJUuzAmcCx__Sfiz7Bijc4wQudC1g3OCMEdDKulWtocZwQPKOd1O9ZDSARcM72b7Mb4mXghU7GVPo9rFpgtN60x-C532-SW0TXSda-o83YWbk_xeh84ZDzEvV_nEg-mCMz9f31cOvE15WtulAZuPX3R4hvwBWh10r3CY7VTaRzj6ywfZ49VkMb4ZzObX0_FoNnge9g8TuALGDLMpysKU3JTSVsANQ9pyXlbGYkNKaysprbWaEM4sl1QUEgMXBT3Izta6L9qrNrg3HVaq0U7djGaqnyHMBBeSfODEnq7ZNjTvS4idenPRgPe6hmYZFZYYCZQOS-jJP_S1WYY6_SRRlEmOSYESJdfUp_Ow2qzHSPW-qN4XtfFFje6mk01HfwHs44VL</recordid><startdate>20170911</startdate><enddate>20170911</enddate><creator>Tiewcharoen, Supakit</creator><creator>Warakulwit, Chompunuch</creator><creator>Lapeyre, Veronique</creator><creator>Garrigue, Patrick</creator><creator>Fourier, Lucas</creator><creator>Elissalde, Catherine</creator><creator>Buffière, Sonia</creator><creator>Legros, Philippe</creator><creator>Gayot, Marion</creator><creator>Limtrakul, Jumras</creator><creator>Kuhn, Alexander</creator><general>Wiley Subscription Services, Inc</general><general>Wiley-VCH Verlag</general><scope>7TM</scope><scope>K9.</scope><scope>7X8</scope><scope>1XC</scope><scope>VOOES</scope><orcidid>https://orcid.org/0000-0002-1962-4863</orcidid><orcidid>https://orcid.org/0000-0003-1911-1870</orcidid><orcidid>https://orcid.org/0000-0002-9416-588X</orcidid></search><sort><creationdate>20170911</creationdate><title>Anisotropic Metal Deposition on TiO2 Particles by Electric‐Field‐Induced Charge Separation</title><author>Tiewcharoen, Supakit ; 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| subjects | bipolar electrochemistry Catalysts Chemical Sciences Deposition Electric charge Electric fields Electrochemistry Electronics industry Gold Heavy metals Irradiation Janus particles Material chemistry metal deposition Nanoparticles Photochemistry Platinum Pollutant deposition Radiation Titanium dioxide |
| title | Anisotropic Metal Deposition on TiO2 Particles by Electric‐Field‐Induced Charge Separation |
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