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  A new conducting polymer with exceptional visible-light photocatalytic activity derived from varbituric acid polycondensation

Keshavarzi, N., Cao, S., & Antonietti, M. (2020). A new conducting polymer with exceptional visible-light photocatalytic activity derived from varbituric acid polycondensation. Advanced Materials, 32(16): 1907702. doi:10.1002/adma.201907702.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-D64A-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-66DB-1
Genre: Journal Article

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 Creators:
Keshavarzi , Neda1, Author
Cao, Shaowen1, Author              
Antonietti, Markus1, Author              
Affiliations:
1Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              

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Free keywords: barbituric acid, conducting polymers, photocatalysts, rhodamine B, visible-light photocatalytic activity
 Abstract: Abstract A novel covalent, metal-free, photocatalytic material is prepared by thermal polymerization of barbituric acid (BA). The structure of the photocatalyst is analyzed by using scanning electron microscopy, X-ray diffraction, and infrared, UV?visible, and 1H solution and 13C solid-state NMR spectroscopy. The photodegradation efficiency of BA thermally polymerized at different temperatures is tested by photocatalytic degradation of aquatic rhodamine B (RhB) dye under visible-light irradiation. It is shown that heating BA at an optimized temperature of 300 °C, that is, still in the range that polymer-like polycondensation takes place, results in a photocatalyst that can remove RhB with 96% photodegradation efficiency after 70 min exposure to visible light. The polycondensation reaction of BA is identified to process through precipitation of trimer units as primary building blocks. Reference experiments such as addition of scavengers and saturation with oxygen are studied to understand the photodegradation process. It is shown that the presence of triethanolamine, and excess of oxygen and p-benzoquinone in the solution of RhB and photocatalyst (BA300) is not beneficial, but decreases the photodegradation efficiency.

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Language(s): eng - English
 Dates: 2020-03-032020
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1002/adma.201907702
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Title: Advanced Materials
  Other : Adv. Mater.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: 1907702 Volume / Issue: 32 (16) Sequence Number: 1907702 Start / End Page: - Identifier: ISSN: 0935-9648