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作者:

Chen, Zhili (Chen, Zhili.) | Chen, Shihua (Chen, Shihua.) | Li, Yonghe (Li, Yonghe.) | Si, Xiaolei (Si, Xiaolei.) | Huang, Jun (Huang, Jun.) | Massey, Sylvain (Massey, Sylvain.) | Chen, Guangliang (Chen, Guangliang.)

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摘要:

In this paper, we reported a recyclable and highly active porous catalyst of titanate nanowires (TNWs) coated with well-distributed Co3O 4 nanoparticles (NPs) (Co3O4/TNWs). Sodium ions of TNWs were exchanged with hydrogen ions in the dilute nitric acid, and this protocol was very suitable for capturing cobalt ions. X-ray diffraction (XRD) demonstrated the existence of Co3O4 phase with unique lattice planes, such as (2 2 0), (3 1 1) and (5 1 1). Electron microscopes (FE-SEM and TEM) indicated that the Co3O4 NPs with an average diameter of 22 ± 3 nm were coated uniformly on TNWs surface (average diameter: 37 ± 5.5 nm), and the Co3O4 NPs mainly exposed their (2 2 0) and (2 2 2) active planes. XPS analysis confirms the formation of Co3O4 phase by the presence of Co 2p peaks at 780.1 eV (2p 3/2) and 795.5 eV (2p 1/2). Methylene blue (MB) and other organic dyes (rhodamine B (RhB) and methyl orange (MO)) were chosen as target compounds for catalytic degradation under indoor scattering light. Compared to the original Co3O4/TNWs catalyst, the catalytic efficiency of nanoscaled catalyst with oxone for MB was about 15 times higher, and the MB solution (10 mg L-1) was completely degraded within 8 min. The catalytic activity of recycled catalyst used in the sixth run still remained very active, and the degradation time for MB was only 16 min. The nanosized catalyst also had a high activity for dyes of RhB (10 mg L-1) and MO (10 mg L-1), as the degradation efficiencies of RhB and MO after 10 min of contact time were about 90.2% and 92.6%, respectively. © 2014 Elsevier Ltd.

关键词:

Dyes Metal ions Catalyst activity Aromatic compounds Azo dyes Rhodium compounds Nanoparticles Nanocatalysts Degradation Nanowires Efficiency

作者机构:

  • [ 1 ] [Chen, Zhili]Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Zhejiang Sci-Tech University, Ministry of Education, Hangzhou 310018, China
  • [ 2 ] [Chen, Shihua]Valparaiso Department of Water Works, 205 Billings Street, Valparaiso, IN 46383, United States
  • [ 3 ] [Li, Yonghe]Institute of Microstructure and Properties of Advanced Materials, Beijing University of Technology, Beijing 100124, China
  • [ 4 ] [Si, Xiaolei]Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Zhejiang Sci-Tech University, Ministry of Education, Hangzhou 310018, China
  • [ 5 ] [Huang, Jun]Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Zhejiang Sci-Tech University, Ministry of Education, Hangzhou 310018, China
  • [ 6 ] [Massey, Sylvain]Groupe en Sciences des Radiations, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
  • [ 7 ] [Chen, Guangliang]Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Zhejiang Sci-Tech University, Ministry of Education, Hangzhou 310018, China

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来源 :

Materials Research Bulletin

ISSN: 0025-5408

年份: 2014

卷: 57

页码: 170-176

5 . 4 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:341

JCR分区:2

中科院分区:3

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SCOPUS被引频次: 40

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