Chapter Ultra-Thin Plasma-Polymerized Functional Coatings for Biosensing: Polyacrylic Acid, Polystyrene and Their Co-Polymer
The photocatalytic properties of titanium dioxide have been widely studied over recent decades since the discovery of water photolysis by TiO2 electrodes in 1972. Titanium dioxide has three main crystal polymorphs; anatase, rutile and brookite and rutile is the most common as the metastable polymorp...
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| المؤلفون الرئيسيون: | , , , |
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| التنسيق: | Online |
| اللغة: | الإنجليزية |
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InTechOpen
2021
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| الوصول للمادة أونلاين: | ONIX_20210602_10.5772/62899_284 |
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| _version_ | 1869519557505318912 |
|---|---|
| author | Castellino, Micaela Rivolo, Paola Ricciardi, Serena Frascella, Francesca |
| author_browse | Castellino, Micaela Frascella, Francesca Ricciardi, Serena Rivolo, Paola |
| author_facet | Castellino, Micaela Rivolo, Paola Ricciardi, Serena Frascella, Francesca |
| author_sort | Castellino, Micaela |
| collection | Directory of Open Access Books |
| description | The photocatalytic properties of titanium dioxide have been widely studied over recent decades since the discovery of water photolysis by TiO2 electrodes in 1972. Titanium dioxide has three main crystal polymorphs; anatase, rutile and brookite and rutile is the most common as the metastable polymorph. Each polymorph has different band gap positions. Anatase’s band gap is 3.2 eV, higher than rutile’s which is 3.0 eV. This difference in the band gap will determine their optimum UV wavelength range to promote a photocatalytic process. There are different methods to assess the photocatalytic activity of a material. The most commonly used method is the degradation of a dye in aqueous solution under UV light, due to its simplicity. Under these conditions the decomposition rate of a suitable organic dye is used as a measure of activity. Physical properties such as particle size and surface area will determine the effective area that will interact and absorb the dye prior to degradation. The physical mechanisms involved in such aqueous based methods differ from gas phase reactions. More advanced techniques use mass spectrometers to evaluate photocatalytic activity of titanium dioxide in the gas phase. An effective photocatalyst for heterogeneous reactions in the gas phase is one which is efficient at creating radicals as a result of an absorbed photon. |
| format | Online |
| id | doab-20.500.12854ir-70644 |
| institution | Directory of Open Access Books |
| language | eng |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | InTechOpen |
| publisherStr | InTechOpen |
| record_format | ojs |
| spelling | doab-20.500.12854ir-706442024-04-05T12:38:29Z Chapter Ultra-Thin Plasma-Polymerized Functional Coatings for Biosensing: Polyacrylic Acid, Polystyrene and Their Co-Polymer Castellino, Micaela Rivolo, Paola Ricciardi, Serena Frascella, Francesca photocatalysis, UV irradiation, nitrogen dioxide, methylene blue reduction, mass spectrometer thema EDItEUR::P Mathematics and Science::PH Physics::PHF Materials / States of matter::PHFC Condensed matter physics (liquid state and solid state physics) The photocatalytic properties of titanium dioxide have been widely studied over recent decades since the discovery of water photolysis by TiO2 electrodes in 1972. Titanium dioxide has three main crystal polymorphs; anatase, rutile and brookite and rutile is the most common as the metastable polymorph. Each polymorph has different band gap positions. Anatase’s band gap is 3.2 eV, higher than rutile’s which is 3.0 eV. This difference in the band gap will determine their optimum UV wavelength range to promote a photocatalytic process. There are different methods to assess the photocatalytic activity of a material. The most commonly used method is the degradation of a dye in aqueous solution under UV light, due to its simplicity. Under these conditions the decomposition rate of a suitable organic dye is used as a measure of activity. Physical properties such as particle size and surface area will determine the effective area that will interact and absorb the dye prior to degradation. The physical mechanisms involved in such aqueous based methods differ from gas phase reactions. More advanced techniques use mass spectrometers to evaluate photocatalytic activity of titanium dioxide in the gas phase. An effective photocatalyst for heterogeneous reactions in the gas phase is one which is efficient at creating radicals as a result of an absorbed photon. 2021-02-10T12:58:18Z 2021-06-02T10:08:20Z 2016 chapter ONIX_20210602_10.5772/62899_284 https://library.oapen.org/handle/20.500.12657/49170 https://directory.doabooks.org/handle/20.500.12854/70644 eng open access image/jpeg image/jpeg n/a n/a https://library.oapen.org/bitstream/20.500.12657/49170/1/50417.pdf https://library.oapen.org/bitstream/20.500.12657/49170/1/50417.pdf InTechOpen 10.5772/62899 10.5772/62899 035ecc65-6737-43cf-a13a-6bdf67ce01f4 open access |
| spellingShingle | photocatalysis, UV irradiation, nitrogen dioxide, methylene blue reduction, mass spectrometer thema EDItEUR::P Mathematics and Science::PH Physics::PHF Materials / States of matter::PHFC Condensed matter physics (liquid state and solid state physics) Castellino, Micaela Rivolo, Paola Ricciardi, Serena Frascella, Francesca Chapter Ultra-Thin Plasma-Polymerized Functional Coatings for Biosensing: Polyacrylic Acid, Polystyrene and Their Co-Polymer |
| title | Chapter Ultra-Thin Plasma-Polymerized Functional Coatings for Biosensing: Polyacrylic Acid, Polystyrene and Their Co-Polymer |
| title_full | Chapter Ultra-Thin Plasma-Polymerized Functional Coatings for Biosensing: Polyacrylic Acid, Polystyrene and Their Co-Polymer |
| title_fullStr | Chapter Ultra-Thin Plasma-Polymerized Functional Coatings for Biosensing: Polyacrylic Acid, Polystyrene and Their Co-Polymer |
| title_full_unstemmed | Chapter Ultra-Thin Plasma-Polymerized Functional Coatings for Biosensing: Polyacrylic Acid, Polystyrene and Their Co-Polymer |
| title_short | Chapter Ultra-Thin Plasma-Polymerized Functional Coatings for Biosensing: Polyacrylic Acid, Polystyrene and Their Co-Polymer |
| title_sort | chapter ultra thin plasma polymerized functional coatings for biosensing polyacrylic acid polystyrene and their co polymer |
| topic | photocatalysis, UV irradiation, nitrogen dioxide, methylene blue reduction, mass spectrometer thema EDItEUR::P Mathematics and Science::PH Physics::PHF Materials / States of matter::PHFC Condensed matter physics (liquid state and solid state physics) |
| topic_facet | photocatalysis, UV irradiation, nitrogen dioxide, methylene blue reduction, mass spectrometer thema EDItEUR::P Mathematics and Science::PH Physics::PHF Materials / States of matter::PHFC Condensed matter physics (liquid state and solid state physics) |
| url | ONIX_20210602_10.5772/62899_284 |
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