Influence of nucleating agent addition on the textural and photo-Fenton properties of Fe(III)/SiO2 catalysts

被引：7
作者：
Mahy, Julien G. [1 ]
Hermans, Sophie [1 ]
Tilkin, Remi G. [2 ,3 ]
Lambert, Stephanie D. [2 ]
机构：
[1] Catholic Univ Louvain, Inst Condensed Matter & Nanosci IMCN, Pl Louis Pasteur 1, B-1348 Louvain La Neuve, Belgium
[2] Univ Liege, Dept Chem Engn Nanomat Catalysis Electrochem, B6a, B-4000 Liege, Belgium
[3] Univ Liege, Ctr Interfac Biomat CEIB, Allee Six Aout 11, B-4000 Liege, Belgium
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2020年 / 144卷
关键词：
Sol-gel synthesis; Fe/SiO2; xerogels; Modified silicon alkoxide; Co-gelation method; Photo-Fenton process; ADVANCED OXIDATION PROCESSES; COGELLED XEROGEL CATALYSTS; VUV/UV LIGHT; SILICA; DEGRADATION; PD/SIO2; DESIGN; WATER; IRON; UV;
D O I：
10.1016/j.jpcs.2020.109502
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Two Fe-based/SiO2 catalysts have been prepared by a sol-gel method, with or without co-gelation with a modified silicon alkoxide, 3-(2-aminoethylamino)propyltrimethoxysilane (EDAS). The aim was to compare these two materials and to study the influence of EDAS on the catalyst texture and photo-Fenton activity. Physicochemical characterization showed that when EDAS was used, the iron was located inside the silica nanoparticles and was partially arranged in iron oxide clusters. As EDAS is a nucleating agent for silica, the reaction time was shorter in its presence, leading to larger silica nanoparticles. Studies of their behavior in aqueous media showed that the catalyst without EDAS released iron, whereas the catalyst with EDAS did not. This iron release influenced the photo-Fenton activities of the catalysts. p-Nitrophenol was degraded more rapidly with the catalyst without EDAS due to the greater availability of iron. Finally, both Fe/SiO2 catalysts displayed stable catalytic activity for 72 h of operation.
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页数：8
相关论文
共 42 条
[11]   Bacterial disinfection by the photo-Fenton process: Extracellular oxidation or intracellular photo-catalysis? [J].
Giannakis, Stefanos ;
Voumard, Margaux ;
Rtimi, Sami ;
Pulgarin, Cesar .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2018, 227 :285-295
[12]  
Guglielmi M., 2016, Handbook of Sol-Gel Science and Technology, P1
[13]   A novel α-Fe2O3@g-C3N4 catalyst: Synthesis derived from Fe-based MOF and its superior photo-Fenton performance [J].
Guo, Ting ;
Wang, Kai ;
Zhang, Gaoke ;
Wu, Xiaoyong .
APPLIED SURFACE SCIENCE, 2019, 469 :331-339
[14]   Iron(III) species dispersed in porous silica through sol-gel chemistry [J].
Heinrichs, Benoit ;
Rebbouh, Leila ;
Geus, John W. ;
Lambert, Stephanie ;
Abbenhuis, Hendrikus C. L. ;
Grandjean, Fernande ;
Long, Gary J. ;
Pirard, Jean-Paul ;
van Santen, Rutger A. .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 2008, 354 (2-9) :665-672
[15]  
Khan MA., 2011, Journal of Arts, Science and Commerce, V2, P276
[16]   Pd-Ag/SiO2 and Pd-Cu/SiO2 cogelled xerogel catalysts for selective hydrodechlorination of 1,2-dichloroethane into ethylene [J].
Lambert, S ;
Ferauche, F ;
Brasseur, A ;
Pirard, JP ;
Heinrichs, B .
CATALYSIS TODAY, 2005, 100 (3-4) :283-289
[17]   Study of textural properties and nucleation phenomenon in Pd/SiO2, Ag/SiO2 and Cu/SiO2 cogelled xerogel catalysts [J].
Lambert, S ;
Alie, C ;
Pirard, JP ;
Heinrichs, B .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 2004, 342 (1-3) :70-81
[18]   Synthesis of Pd/SiO2, Ag/SiO2, and Cu/SiO2 cogelled xerogel catalysts:: study of metal dispersion and catalytic activity [J].
Lambert, S ;
Cellier, C ;
Grange, P ;
Pirard, JP ;
Heinrichs, B .
JOURNAL OF CATALYSIS, 2004, 221 (02) :335-346
[19]   Tailor-made morphologies for Pd/SiO2 catalysts through sol-gel process with various silylated ligands [J].
Lambert, Stephanie ;
Tran, Kim Yen ;
Arrachart, Guilhem ;
Noville, Francis ;
Henrist, Catherine ;
Bied, Catherine ;
Moreau, Joel J. E. ;
Chi Man, Michel Wong ;
Heinrichs, Benoit .
MICROPOROUS AND MESOPOROUS MATERIALS, 2008, 115 (03) :609-617
[20]  
Lecloux A. J., 1981, CATALYSIS SCI TECHNO, V2, P171
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