Photocatalytic reduction of azo dyes Naphthol Blue Black and Disperse Blue 79
Photocatalytic reduction of two textile azo dyes, Naphthol Blue Black (NBB) and Disperse Blue 79 (DB79) has been carried out in colloidal WO3 and TiO2 suspensions. Under bandgap excitation of the semiconductor colloids these dyes undergo irreversible reduction as they react with the trapped electron...
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| Published in: | Research on chemical intermediates Vol. 23; no. 3; pp. 219 - 231 |
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Springer Nature B.V
01-01-1997
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| Abstract | Photocatalytic reduction of two textile azo dyes, Naphthol Blue Black (NBB) and Disperse Blue 79 (DB79) has been carried out in colloidal WO3 and TiO2 suspensions. Under bandgap excitation of the semiconductor colloids these dyes undergo irreversible reduction as they react with the trapped electrons. The quantum efficiency for the photocatalytic reduction of these dyes were 5.4% and 4.8% for NBB and DB79 respectively. The kinetics and mechanism of the interfacial charge transfer in these colloidal suspension has been elucidated with transient absorption spectroscopy. The reaction between the dye and trapped electrons is diffusion limited and occurs with rate constants of 1.1×108 M−1s−1 and 4.0×107 M−1s−1 for NBB and DB79 respectively. |
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| AbstractList | Photocatalytic reduction of two textile azo dyes, Naphthol Blue Black (NBB) and Disperse Blue 79 (DB79) has been carried out in colloidal WO3 and TiO2 suspensions. Under bandgap excitation of the semiconductor colloids these dyes undergo irreversible reduction as they react with the trapped electrons. The quantum efficiency for the photocatalytic reduction of these dyes were 5.4% and 4.8% for NBB and DB79 respectively. The kinetics and mechanism of the interfacial charge transfer in these colloidal suspension has been elucidated with transient absorption spectroscopy. The reaction between the dye and trapped electrons is diffusion limited and occurs with rate constants of 1.1×108 M−1s−1 and 4.0×107 M−1s−1 for NBB and DB79 respectively. |
| Author | Chattopadhyay, A. K. Nasr, C. Kamat, P. V. Vinodgopal, K. Hotchandani, S. |
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| Cites_doi | 10.1021/j150648a018 10.1021/cr00035a013 10.1021/jo00055a033 10.1021/es950896l 10.1007/BF03051818 10.1002/(SICI)1234-985X(199606)3:2<77::AID-HCR49>3.0.CO;2-M 10.1021/la00018a024 10.1021/j100045a027 10.1007/978-94-009-0259-6_23 10.1016/1010-6030(94)03810-4 10.1002/9780470166451.ch6 10.1021/j150668a017 10.1007/BF00242533 10.1021/cr00033a004 10.1021/j100088a008 10.1063/1.468376 10.1063/1.555770 10.1021/j100144a027 |
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| References | M. Boeninger (230300219_CR4) 1990; 80 P.V. Kamat (230300219_CR15) 1996 D. Schmelling (230300219_CR18) 1996; 30 M.R. Hoffman (230300219_CR12) 1995; 95 230300219_CR7 H. Zollinger (230300219_CR2) 1987 W.C. Tincher (230300219_CR3) 1989; 21 230300219_CR10 M. Anpo (230300219_CR9) 1989; 11 M.T. Nenadovic (230300219_CR19) 1984; 88 A.L. Linsebigler (230300219_CR14) 1995; 95 U. Stafford (230300219_CR13) 1996; 3 P.V. Kamat (230300219_CR29) 1994; 19 N. Serpone (230300219_CR26) 1995; 99 A.A. Vaidya (230300219_CR1) 1982; 14 (230300219_CR8) 1989 I. Bedja (230300219_CR20) 1993; 97 K. Rajeshwar (230300219_CR11) 1995; 25 D. Bahnemann (230300219_CR28) 1994 C. Arbour (230300219_CR23) 1987 F. Mahadevi (230300219_CR17) 1993; 58 D. Bahnemann (230300219_CR22) 1984; 88 J.E. Evans (230300219_CR24) 1994; 101 230300219_CR27 K. Vinodgopal (230300219_CR16) 1996; April P.V. Kamat (230300219_CR21) 1994; 98 P.V. Kamat (230300219_CR25) 1996 K. Vinodgopal (230300219_CR5) 1994; 10 K. Vinodgopal (230300219_CR6) 1994; 83 |
| References_xml | – volume: 14 start-page: 3 year: 1982 ident: 230300219_CR1 publication-title: Colourage contributor: fullname: A.A. Vaidya – volume: 88 start-page: 709 year: 1984 ident: 230300219_CR22 publication-title: J. Phys. Chem. doi: 10.1021/j150648a018 contributor: fullname: D. Bahnemann – ident: 230300219_CR10 – volume-title: Color Chemistry: Synthesis, Properties and Applications of Organic Dyes and Pigments year: 1987 ident: 230300219_CR2 contributor: fullname: H. Zollinger – volume-title: Photocatalysis, Fundamentals and Applications year: 1989 ident: 230300219_CR8 – volume: 95 start-page: 735 year: 1995 ident: 230300219_CR14 publication-title: Chem. Rev. doi: 10.1021/cr00035a013 contributor: fullname: A.L. Linsebigler – volume: 19 start-page: 277 year: 1994 ident: 230300219_CR29 publication-title: Progr. React. Kinetics contributor: fullname: P.V. Kamat – volume: 21 start-page: 33 year: 1989 ident: 230300219_CR3 publication-title: Textile Chemist and Colorist contributor: fullname: W.C. Tincher – volume: 58 start-page: 744 year: 1993 ident: 230300219_CR17 publication-title: J. Org. Chem. doi: 10.1021/jo00055a033 contributor: fullname: F. Mahadevi – volume: 30 start-page: 2547 year: 1996 ident: 230300219_CR18 publication-title: Environ. Sci. Technol. doi: 10.1021/es950896l contributor: fullname: D. Schmelling – volume: 11 start-page: 67 year: 1989 ident: 230300219_CR9 publication-title: Res. Chem. Intermed. doi: 10.1007/BF03051818 contributor: fullname: M. Anpo – volume: 3 start-page: 77 year: 1996 ident: 230300219_CR13 publication-title: Heterogeneous Chemistry Reviews doi: 10.1002/(SICI)1234-985X(199606)3:2<77::AID-HCR49>3.0.CO;2-M contributor: fullname: U. Stafford – volume: 10 start-page: 1767 year: 1994 ident: 230300219_CR5 publication-title: Langmuir doi: 10.1021/la00018a024 contributor: fullname: K. Vinodgopal – volume: 99 start-page: 16655 year: 1995 ident: 230300219_CR26 publication-title: J. Phys. Chem. doi: 10.1021/j100045a027 contributor: fullname: N. Serpone – start-page: 303 volume-title: Fine Particles Science and Technology: From Micro to Nanoparticles year: 1996 ident: 230300219_CR25 doi: 10.1007/978-94-009-0259-6_23 contributor: fullname: P.V. Kamat – volume: 83 start-page: 141 year: 1994 ident: 230300219_CR6 publication-title: J. Photochem. Photobiol., A: Chemistry doi: 10.1016/1010-6030(94)03810-4 contributor: fullname: K. Vinodgopal – volume-title: Photochemistry and Photophysics of Coordination Compounds year: 1987 ident: 230300219_CR23 contributor: fullname: C. Arbour – volume: 80 start-page: 119 year: 1990 ident: 230300219_CR4 publication-title: DHHS (NIOSH) contributor: fullname: M. Boeninger – start-page: 273 volume-title: Molecular Level Artificial Photosynthetic Materials year: 1996 ident: 230300219_CR15 doi: 10.1002/9780470166451.ch6 contributor: fullname: P.V. Kamat – volume: April start-page: 18 year: 1996 ident: 230300219_CR16 publication-title: CHEMTECH contributor: fullname: K. Vinodgopal – volume: 88 start-page: 5827 year: 1984 ident: 230300219_CR19 publication-title: J. Phys. Chem. doi: 10.1021/j150668a017 contributor: fullname: M.T. Nenadovic – volume: 25 start-page: 1067 year: 1995 ident: 230300219_CR11 publication-title: J. Appl. Electrochem. doi: 10.1007/BF00242533 contributor: fullname: K. Rajeshwar – volume: 95 start-page: 69 year: 1995 ident: 230300219_CR12 publication-title: Chem. Rev. doi: 10.1021/cr00033a004 contributor: fullname: M.R. Hoffman – volume: 98 start-page: 9137 year: 1994 ident: 230300219_CR21 publication-title: J. Phys. Chem. doi: 10.1021/j100088a008 contributor: fullname: P.V. Kamat – ident: 230300219_CR7 – volume: 101 start-page: 6222 year: 1994 ident: 230300219_CR24 publication-title: J. Chem. Phys. doi: 10.1063/1.468376 contributor: fullname: J.E. Evans – ident: 230300219_CR27 doi: 10.1063/1.555770 – start-page: 261 volume-title: Aquatic and Surface Chemistry year: 1994 ident: 230300219_CR28 contributor: fullname: D. Bahnemann – volume: 97 start-page: 11064 year: 1993 ident: 230300219_CR20 publication-title: J. Phys. Chem. doi: 10.1021/j100144a027 contributor: fullname: I. Bedja |
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| Snippet | Photocatalytic reduction of two textile azo dyes, Naphthol Blue Black (NBB) and Disperse Blue 79 (DB79) has been carried out in colloidal WO3 and TiO2... |
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| SubjectTerms | Absorption spectroscopy Azo dyes Charge transfer Colloids Diffusion rate Dispersion Electrons Naphthol Quantum efficiency Rate constants Reduction Titanium dioxide |
| Title | Photocatalytic reduction of azo dyes Naphthol Blue Black and Disperse Blue 79 |
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