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Title: Ball-milled CuPc/TiO{sub 2} hybrid nanocomposite and its photocatalytic degradation of aqueous Rhodamine B

Abstract

Graphical abstract: This work reports on the synthesis of hybrid composites of titanium dioxide and copper phthalocyanine via ball-milling assisted process in combination with mechanical mixing process. Their structural properties and photocatalytic degradation of aqueous RhB were investigated. The significant enhancement of the photocatalytic performance of the composite may be related to the charge recombination suppression guiding to the increase of free functional radicals participated in degradation process. Highlights: ► CuPc/TiO{sub 2} nanocomposite was synthesized by ball-milling assisted process and mechanical mixing method. ► Ball milling process can reduce CuPc size and assist the formation of well-dispersed composite. ► Loaded CuPc has inconsiderable influence on basic crystal structure of TiO{sub 2} matrix. ► The optical absorption properties of TiO{sub 2} in UV and visible light is improved with the existence of CuPc. ► CuPc/TiO{sub 2} nanocomposite can efficiently heighten the catalytic performance of TiO{sub 2} in the photodegradation of RhB. -- Abstract: Hybrid composites of titanium dioxide and copper phthalocyanine were synthesized by ball-milling assisted process in combination with mechanically stirring method. Structural properties of as-synthesized composites were characterized by X-ray diffraction (XRD), X-ray absorption fine structure (XANES) and scanning electron microscope (SEM). The optical absorbance of as-prepared composites andmore » their photocatalytic activities were investigated by UV–vis spectroscopy. XRD and XANES results confirm that CuPc/TiO{sub 2} nanocomposite is still in the same structure of TiO{sub 2} and CuPc. SEM result reveals that the decreasing particle size of ball-milled CuPc has good dispersion on the surface of TiO{sub 2}. Absorptivity in UV region of the composites is heightened and shifted to visible light due to strong absorbance in blue-green spectrum of CuPc. The photocatalytic degradation of Rhodamine B dye solution using as-synthesized composites was investigated under ultraviolet irradiation. The optimized condition for RhB photodegradation was obtained for 1 wt.% CuPc/TiO{sub 2} nanocomposite with efficiency of 87.5% and reaction rate of 0.15 min{sup −1}. The significant improvement in photocatalytic activity of the hybrid composite may be associated to the enhancement of optical absorption and the inhibition of electron–hole recombination caused by the presence of CuPc in TiO{sub 2} matrix.« less

Authors:
 [1];  [2];  [3];  [2];  [2];  [1];  [2]
  1. Nanocomposite Material Research Laboratory, College of Nanotechnology, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520 (Thailand)
  2. (Thailand)
  3. Electroceramic Research Laboratory, College of Nanotechnology, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520 (Thailand)
Publication Date:
OSTI Identifier:
22215544
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 47; Journal Issue: 11; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION; ABSORPTION SPECTROSCOPY; ABSORPTIVITY; CRYSTAL STRUCTURE; HYBRIDIZATION; OPTICAL PROPERTIES; PARTICLE SIZE; PHOTOCATALYSIS; REACTION KINETICS; SCANNING ELECTRON MICROSCOPY; TITANIUM OXIDES; X-RAY DIFFRACTION; X-RAY SPECTROSCOPY

Citation Formats

Mekprasart, W., E-mail: wani.mek@gmail.com, ThEP Center, CHE, 328 Si Ayutthaya Rd., Bangkok 10400, Vittayakorn, N., ThEP Center, CHE, 328 Si Ayutthaya Rd., Bangkok 10400, Department of Chemistry, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Pecharapa, W., and ThEP Center, CHE, 328 Si Ayutthaya Rd., Bangkok 10400. Ball-milled CuPc/TiO{sub 2} hybrid nanocomposite and its photocatalytic degradation of aqueous Rhodamine B. United States: N. p., 2012. Web. doi:10.1016/J.MATERRESBULL.2012.08.024.
Mekprasart, W., E-mail: wani.mek@gmail.com, ThEP Center, CHE, 328 Si Ayutthaya Rd., Bangkok 10400, Vittayakorn, N., ThEP Center, CHE, 328 Si Ayutthaya Rd., Bangkok 10400, Department of Chemistry, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Pecharapa, W., & ThEP Center, CHE, 328 Si Ayutthaya Rd., Bangkok 10400. Ball-milled CuPc/TiO{sub 2} hybrid nanocomposite and its photocatalytic degradation of aqueous Rhodamine B. United States. doi:10.1016/J.MATERRESBULL.2012.08.024.
Mekprasart, W., E-mail: wani.mek@gmail.com, ThEP Center, CHE, 328 Si Ayutthaya Rd., Bangkok 10400, Vittayakorn, N., ThEP Center, CHE, 328 Si Ayutthaya Rd., Bangkok 10400, Department of Chemistry, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Pecharapa, W., and ThEP Center, CHE, 328 Si Ayutthaya Rd., Bangkok 10400. Thu . "Ball-milled CuPc/TiO{sub 2} hybrid nanocomposite and its photocatalytic degradation of aqueous Rhodamine B". United States. doi:10.1016/J.MATERRESBULL.2012.08.024.
@article{osti_22215544,
title = {Ball-milled CuPc/TiO{sub 2} hybrid nanocomposite and its photocatalytic degradation of aqueous Rhodamine B},
author = {Mekprasart, W., E-mail: wani.mek@gmail.com and ThEP Center, CHE, 328 Si Ayutthaya Rd., Bangkok 10400 and Vittayakorn, N. and ThEP Center, CHE, 328 Si Ayutthaya Rd., Bangkok 10400 and Department of Chemistry, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520 and Pecharapa, W. and ThEP Center, CHE, 328 Si Ayutthaya Rd., Bangkok 10400},
abstractNote = {Graphical abstract: This work reports on the synthesis of hybrid composites of titanium dioxide and copper phthalocyanine via ball-milling assisted process in combination with mechanical mixing process. Their structural properties and photocatalytic degradation of aqueous RhB were investigated. The significant enhancement of the photocatalytic performance of the composite may be related to the charge recombination suppression guiding to the increase of free functional radicals participated in degradation process. Highlights: ► CuPc/TiO{sub 2} nanocomposite was synthesized by ball-milling assisted process and mechanical mixing method. ► Ball milling process can reduce CuPc size and assist the formation of well-dispersed composite. ► Loaded CuPc has inconsiderable influence on basic crystal structure of TiO{sub 2} matrix. ► The optical absorption properties of TiO{sub 2} in UV and visible light is improved with the existence of CuPc. ► CuPc/TiO{sub 2} nanocomposite can efficiently heighten the catalytic performance of TiO{sub 2} in the photodegradation of RhB. -- Abstract: Hybrid composites of titanium dioxide and copper phthalocyanine were synthesized by ball-milling assisted process in combination with mechanically stirring method. Structural properties of as-synthesized composites were characterized by X-ray diffraction (XRD), X-ray absorption fine structure (XANES) and scanning electron microscope (SEM). The optical absorbance of as-prepared composites and their photocatalytic activities were investigated by UV–vis spectroscopy. XRD and XANES results confirm that CuPc/TiO{sub 2} nanocomposite is still in the same structure of TiO{sub 2} and CuPc. SEM result reveals that the decreasing particle size of ball-milled CuPc has good dispersion on the surface of TiO{sub 2}. Absorptivity in UV region of the composites is heightened and shifted to visible light due to strong absorbance in blue-green spectrum of CuPc. The photocatalytic degradation of Rhodamine B dye solution using as-synthesized composites was investigated under ultraviolet irradiation. The optimized condition for RhB photodegradation was obtained for 1 wt.% CuPc/TiO{sub 2} nanocomposite with efficiency of 87.5% and reaction rate of 0.15 min{sup −1}. The significant improvement in photocatalytic activity of the hybrid composite may be associated to the enhancement of optical absorption and the inhibition of electron–hole recombination caused by the presence of CuPc in TiO{sub 2} matrix.},
doi = {10.1016/J.MATERRESBULL.2012.08.024},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 11,
volume = 47,
place = {United States},
year = {2012},
month = {11}
}