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Facile preparation of mesoporous TiO2(B) nanowires with well-dispersed Fe2O3 nanoparticles and their photochemical catalytic behavior

Paper ID Volume ID Publish Year Pages File Format Full-Text
45962 46427 2014 10 PDF Available
Title
Facile preparation of mesoporous TiO2(B) nanowires with well-dispersed Fe2O3 nanoparticles and their photochemical catalytic behavior
Abstract

•Fe2O3@ TNWs(B) was first prepared by an impregnation–solvothermal method.•Impregnation duration time had significant effect on size and location of Fe2O3.•Fixed interface of Fe2O3 and TNWs(B) improved electron transfer and stability.•Synergistic effect of Fe2O3 and TNWs(B) was pivotal to enhance catalytic performance.

We report a facile impregnation–solvothermal method for the preparation of mesoporous TiO2(B) nanowires (TNWs(B)) supporting with Fe2O3 nanoparticles (NPs). Open tunnel and porous structure of TNWs(B) provided a confined micro-environment for the stabilization of well-dispersed nanoparticles. The intact fibrous morphology structure, high crystallinity and porosity were remained for TNWs(B) after supporting by nanoparticles. UV−visible DRS analysis indicated that the loading of Fe2O3 on TNWs(B) promoted light harvesting ability and further extended the absorption range. The photocatalytic experiments showed that Fe2O3/TNWs(B) had remarkable catalytic activity for photochemical oxidation of organic pollutants Direct Red 4BS in presence of H2O2 and exhibited excellent tolerance with respect to organic matter poisoning, which was attributed to favorable synergetic effect of Fe2O3 NPs and TNWs(B) support. Compared with P25, the composite material taking the advantage of fibrous morphology was more easily separated from reaction system simply by sedimentation. Moreover, the greatest interest of our finding would be exploring that impregnation duration had significant effect on size and location of NPs supported on TNWs(B). When impregnation duration time was higher than 12 h, NPs with d < 2 nm were highly dispersed in porous nanoarchitecture and had positive effect on catalytic performance, which was due to the facilitation of interfacial photo-generated electrons transfer between (0 0 1) planes in TiO2(B) and (1 1 3) planes of Fe2O3. The high-degree control over size and location of nanoparticles provides valuable insights for understanding relationship between structure and catalytic activity.

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Keywords
TiO2(B) nanowire; Fe2O3 nanoparticle; Synergistic effect; Impregnation–solvothermal method; Size and location controlBJH, Barrett Joyner and Halenda; CB, conduction band; d, particle size (nm); DRS, diffuse reflectance spectra; EDS, energy dispersive spec
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Facile preparation of mesoporous TiO2(B) nanowires with well-dispersed Fe2O3 nanoparticles and their photochemical catalytic behavior
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 150–151, 5 May 2014, Pages 544–553
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