Preparation of hollow TiO2 microspheres using a novel polymer microsphere template
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| Title: | Preparation of hollow TiO |
|---|---|
| Authors: | Xiong, Xiaopeng1,2,3 xpxiong@xmu.edu.cn, Lin, Mingfeng1,4, Duan, Jiangjiang1, Wang, Yong1, Yu, Zhaoju1 |
| Source: | Reactive & Functional Polymers. Jun2012, Vol. 72 Issue 6, p365-371. 7p. |
| Subjects: | Microspheres, Titanium dioxide, Toluene, Copolymers, Methanol, Polymer solutions, Hydrolysis, Ultraviolet radiation |
| Abstract: | Abstract: In this work, composite microspheres were prepared by casting a toluene solution of tetrabutyl titanate and poly(styrene-block-butadiene) copolymer in a methanol vapor atmosphere. It has been observed that the cooling of the surface of the polymer solution from the evaporation of the solvent results in condensation of methanol vapor. The condensed methanol spreads out on the substrate because of its lower surface tension, while the polymer solution with higher surface tension would shrink to form the final microspheres. The distribution of Ti was analyzed to directly evidence the above mechanism for the formation of the microspheres. The Ti was found to enrich at the outer surface of the composite microsphere because of the hydrolysis and the consequent dehydratative polycondensation reactions of tetrabutyl titanate when the composite microspheres were placed in air. The obtained composite microspheres were then subjected to a water vapor phase hydrothermal post-treatment to produce strong Ti-oxo type networks, which would form the framework to maintain the original spherical shape. Then, the composite microspheres were calcined in air at 550°C to remove the polymer; thus, hollow TiO2 microspheres have been fabricated. The obtained hollow TiO2 microspheres were applied to the degradation of methyl orange under UV irradiation and revealed a satisfactory photocatalytic activity. [Copyright &y& Elsevier] |
| Copyright of Reactive & Functional Polymers is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 75169552 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Preparation of hollow TiO<subscript>2</subscript> microspheres using a novel polymer microsphere template – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Xiong%2C+Xiaopeng%22">Xiong, Xiaopeng</searchLink><relatesTo>1,2,3</relatesTo><i> xpxiong@xmu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Lin%2C+Mingfeng%22">Lin, Mingfeng</searchLink><relatesTo>1,4</relatesTo><br /><searchLink fieldCode="AR" term="%22Duan%2C+Jiangjiang%22">Duan, Jiangjiang</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Wang%2C+Yong%22">Wang, Yong</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Yu%2C+Zhaoju%22">Yu, Zhaoju</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Reactive+%26+Functional+Polymers%22">Reactive & Functional Polymers</searchLink>. Jun2012, Vol. 72 Issue 6, p365-371. 7p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Microspheres%22">Microspheres</searchLink><br /><searchLink fieldCode="DE" term="%22Titanium+dioxide%22">Titanium dioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Toluene%22">Toluene</searchLink><br /><searchLink fieldCode="DE" term="%22Copolymers%22">Copolymers</searchLink><br /><searchLink fieldCode="DE" term="%22Methanol%22">Methanol</searchLink><br /><searchLink fieldCode="DE" term="%22Polymer+solutions%22">Polymer solutions</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrolysis%22">Hydrolysis</searchLink><br /><searchLink fieldCode="DE" term="%22Ultraviolet+radiation%22">Ultraviolet radiation</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract: In this work, composite microspheres were prepared by casting a toluene solution of tetrabutyl titanate and poly(styrene-block-butadiene) copolymer in a methanol vapor atmosphere. It has been observed that the cooling of the surface of the polymer solution from the evaporation of the solvent results in condensation of methanol vapor. The condensed methanol spreads out on the substrate because of its lower surface tension, while the polymer solution with higher surface tension would shrink to form the final microspheres. The distribution of Ti was analyzed to directly evidence the above mechanism for the formation of the microspheres. The Ti was found to enrich at the outer surface of the composite microsphere because of the hydrolysis and the consequent dehydratative polycondensation reactions of tetrabutyl titanate when the composite microspheres were placed in air. The obtained composite microspheres were then subjected to a water vapor phase hydrothermal post-treatment to produce strong Ti-oxo type networks, which would form the framework to maintain the original spherical shape. Then, the composite microspheres were calcined in air at 550°C to remove the polymer; thus, hollow TiO2 microspheres have been fabricated. The obtained hollow TiO2 microspheres were applied to the degradation of methyl orange under UV irradiation and revealed a satisfactory photocatalytic activity. [Copyright &y& Elsevier] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Reactive & Functional Polymers is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.reactfunctpolym.2012.03.012 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 7 StartPage: 365 Subjects: – SubjectFull: Microspheres Type: general – SubjectFull: Titanium dioxide Type: general – SubjectFull: Toluene Type: general – SubjectFull: Copolymers Type: general – SubjectFull: Methanol Type: general – SubjectFull: Polymer solutions Type: general – SubjectFull: Hydrolysis Type: general – SubjectFull: Ultraviolet radiation Type: general Titles: – TitleFull: Preparation of hollow TiO2 microspheres using a novel polymer microsphere template Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Xiong, Xiaopeng – PersonEntity: Name: NameFull: Lin, Mingfeng – PersonEntity: Name: NameFull: Duan, Jiangjiang – PersonEntity: Name: NameFull: Wang, Yong – PersonEntity: Name: NameFull: Yu, Zhaoju IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2012 Type: published Y: 2012 Identifiers: – Type: issn-print Value: 13815148 Numbering: – Type: volume Value: 72 – Type: issue Value: 6 Titles: – TitleFull: Reactive & Functional Polymers Type: main |
| ResultId | 1 |
