Facile fabrication of p-n heterojunctions for Cu{sub 2}O submicroparticles deposited on anatase TiO{sub 2} nanobelts

Journal Article · Tue Nov 15 04:00:00 EST 2011 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2011.06.033· OSTI ID:22210132

Li, Li ^[1]; Lei, Jingguo ^[2]; Ji, Tianhao ^[1]

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1. College of Science, Beijing Technology and Business University, 11 Fucheng Road, Beijing 100048 (China)
2. Department of Materials Science and Engineering, Luoyang Institute of Science and Technology, Luoyang 471023 (China)

Graphical abstract: Cu{sub 2}O particle-deposited TiO{sub 2} nanobelts with p-n semiconductor heterojunction structure were successfully prepared via two-step preparation process, and their visible-light photodegradation activities of Rhodamine B were investigated in detail. Highlights: {yields} Cu{sub 2}O particle-deposited TiO{sub 2} nanobelts mainly with diameters in a range of 200-400 nm were successfully prepared. {yields} The amount of Cu{sub 2}O particles deposited on TiO{sub 2} nanobelts can be tuned. {yields} The composite structure with Cu{sub 2}O particles and TiO{sub 2} nanobelts exhibits p-n semiconductor heterojunction performance. {yields} Photocatalytic properties of such composites. -- Abstract: In this paper, Cu{sub 2}O particle-deposited TiO{sub 2} nanobelts with p-n semiconductor heterojunction structure were successfully prepared via a two-step preparation process to investigate electron-transfer performance between p-type Cu{sub 2}O and n-type TiO{sub 2}. Various measurement results confirm that the amount of pure Cu{sub 2}O submicroparticles, with diameters within the range of 200-400 nm and deposited on the surface of TiO{sub 2} nanobelts, can be controlled, and that the purity of Cu{sub 2}O is heavily affected by reaction time. Visible-light photodegradation activities of Rhodamine B show that photocatalysts have little or no photocatalytic activities mainly due to their p-n heterojunction structure, indicating that there hardly appears any electron-transfer from Cu{sub 2}O to TiO{sub 2}.

• OSTI ID: 22210132
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 11 Vol. 46; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
77 NANOSCIENCE AND NANOTECHNOLOGY
COPPER OXIDES
DEPOSITS
ELECTRON TRANSFER
FABRICATION
HETEROJUNCTIONS
NANOSTRUCTURES
P-N JUNCTIONS
PARTICLES
PHOTOCATALYSIS
SEMICONDUCTOR MATERIALS
SURFACES
SYNTHESIS
TITANIUM OXIDES