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Highly active photocatalytic ZnO nanocrystalline rods supported on polymer fiber mats: Synthesis using atomic layer deposition and hydrothermal crystal growth

Paper ID Volume ID Publish Year Pages File Format Full-Text
41311 45884 2011 6 PDF Available
Title
Highly active photocatalytic ZnO nanocrystalline rods supported on polymer fiber mats: Synthesis using atomic layer deposition and hydrothermal crystal growth
Abstract

Photocatalytically active zinc oxide nanocrystalline rods are grown on high surface area polybutylene terephthalate (PBT) polymer fiber mats using low temperature solution based methods, where the oxide crystal nucleation is facilitated using conformal thin films formed by low temperature vapor phase atomic layer deposition (ALD). Scanning electron microscopy (SEM) confirms that highly oriented single crystal ZnO nanorod crystals are directed normal to the starting fiber substrate surface, and the extent of nanocrystal growth within the fiber mat bulk is affected by the overall thickness of the ZnO nucleation layer. The high surface area of the nanocrystal-coated fibers is confirmed by nitrogen adsorption/desorption analysis. An organic dye in aqueous solution in contact with the coated fiber degraded rapidly upon ultraviolet light exposure, allowing quantitative analysis of the photocatalytic properties of fibers with and without nanorod crystals present. The dye degrades nearly twice as fast in contact with the ZnO nanorod crystals compared with samples with only an ALD ZnO layer. Additionally, the catalyst on the polymer fiber mat could be reused without need for a particle recovery step. This combination of ALD and hydrothermal processes could produce high surface area finishes on complex polymer substrates for reusable photocatalytic and other surface-reaction applications.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (320 K)Download as PowerPoint slideHighlights► Polymer fibers can support highly active nanocrystalline oxide photocatalysts. ► Atomic layer deposition forms a uniform seed layer for ZnO nanorod growth. ► Supported catalyst prevents the aggregation of active nanocrystals. ► Nanocrystals on fibers show superior photocatalytic degradation of organics.

Keywords
Atomic layer deposition; Nonwoven fiber; Diethyl zinc; Zinc oxide; Nanocrystals; Nanorods; Hydrothermal; Photocatalytic
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Highly active photocatalytic ZnO nanocrystalline rods supported on polymer fiber mats: Synthesis using atomic layer deposition and hydrothermal crystal growth
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 407, Issues 1–2, 4 November 2011, Pages 211–216
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us