Article (Scientific journals)
Photocatalytic decomposition of hydrogen peroxide over nanoparticles of TiO2 and Ni(II)-porphyrin doped TiO2: a relationship between activity and porphyrin anchoring mode
Tasseroul, Ludivine; Pàez Martinez, Carlos; Lambert, Stéphanie et al.
2016In Applied Catalysis B: Environmental, 182, p. 405-413
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Keywords :
TiO2 sensitization; O2-production monitoring; Nickel tetra(4-carboxyphenyl)porphyrin (TCPPNi); Porphyrin anchoring; Hydrogen peroxide photodegradation
Abstract :
[en] The nickel tetra(4-carboxyphenyl)porphyrin (TCPPNi) was chimisorbed on Degussa P25 TiO2 at different concentrations. Diffuse reflectance spectroscopy in the UV/vis region, Fourier transform infrared spectroscopy and thermal gravimetry combined with differential scanning calorimetry measurements allowed the determination of the TCPPNi anchoring mode. At low TCPPNi concentrations, this anchoring on Degussa P25 TiO2 took place through all four carboxylic groups, while at higher concentrations the anchoring occurred through one or two carboxylic groups. For the firsttime,the effect of UV/vis light irradiation on the H2O2-degradation activity of TiO2 and TCPPNi-doped TiO2 was studied using the method of following the production of O2 by gas pressure monitoring. The activity of seven different catalysts was related to the TCPPNi anchoring mode and the percentage of TiO2 Degussa P25 coverage. An optimum degradation of H2O2 was observed for 0.0115 mol TCPPNi × g−1 P25. In that case, the TCPPNi was anchored through the four carboxylic groups, corresponding to a strong interaction with Degussa P25 TiO2. Moreover, the TCPPNi did not cover the surface completely, therefore allowing the light to reach and activate the TiO2.
Disciplines :
Materials science & engineering
Chemical engineering
Author, co-author :
Tasseroul, Ludivine ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Bio-industries
Pàez Martinez, Carlos ;  Université de Liège > Department of Chemical Engineering > Génie chimique - Nanomatériaux et interfaces
Lambert, Stéphanie  ;  Université de Liège > Department of Chemical Engineering > Department of Chemical Engineering
Eskenazi, David
Heinrichs, Benoît ;  Université de Liège > Department of Chemical Engineering > Génie chimique - Nanomatériaux et interfaces
Language :
English
Title :
Photocatalytic decomposition of hydrogen peroxide over nanoparticles of TiO2 and Ni(II)-porphyrin doped TiO2: a relationship between activity and porphyrin anchoring mode
Publication date :
2016
Journal title :
Applied Catalysis B: Environmental
ISSN :
0926-3373
eISSN :
1873-3883
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
182
Pages :
405-413
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 05 January 2016

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