Journal ArticleDOI
Investigating the Role of Zeolite Nanocrystal Seeds in the Synthesis of Mesoporous Catalysts with Zeolite Wall Structure
TLDR
In this paper, mesoporous titania-silica catalysts were prepared by hydrothermal conversion from synthesis solutions containing a zeolite structure directing agent (TPA+) and a porogen (CTA+).Abstract:
Mesoporous titania-silica catalysts were prepared by hydrothermal conversion from synthesis solutions containing a zeolite structure directing agent (TPA+) and a porogen (CTA+). Syntheses were carried out with and without addition of zeolite seeds (i.e., TS-1 and Sil-1 nanocrystals). Catalysts prepared in the presence of zeolite nanocrystal seeds have greater proportions of tetrahedrally coordinated titanium, which correlate well with the detection of zeolite SBU fragments and ring-structure by TOF-SIMS and FTIR. The incorporation of titano-silicates and zeolite structural units in the mesopore walls could explain the better activity and stability of these catalysts (Ti-MT1 and Ti-MS1) compared to the catalyst prepared by the conventional method (Ti-MCM-41). The similarity in the reactivity of catalysts prepared from TS-1 and Sil-1 nanocrystal seeds dispels the idea that the seeds are merely a source of the zeolite fragments incorporated in the pore walls but instead suggests that the seeds play an active...read more
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Journal ArticleDOI
LaMnO3 perovskite oxides prepared by different methods for catalytic oxidation of toluene
Chuanhui Zhang,Chuanhui Zhang,Yanglong Guo,Yun Guo,Guanzhong Lu,Antoinette Boreave,Laurence Retailleau,Alexandre Baylet,A. Giroir-Fendler +8 more
TL;DR: In this paper, perovskite-type oxides of LaMnO 3 (LMO) were synthesized by citrate sol-gel (SG), glycine combustion (GC) and co-precipitation (CP) methods, respectively.
Journal ArticleDOI
Manganese oxide-based catalysts for toluene oxidation
Z. Sihaib,Fabrizio Puleo,Jesús Manuel García-Vargas,Laurence Retailleau,Claude Descorme,Leonarda F. Liotta,José Luis Valverde,Sonia Gil,Anne Giroir-Fendler +8 more
TL;DR: In this article, four different catalysts based on manganese oxide were prepared: a perovskite (LaMnO 3 ), via sol-gel method; Mn 2 O 3, rapid method; and an octahedral molecular sieve (OMS-2) by two different preparation methods, via solid state and hydrothermal method.
Journal ArticleDOI
A simple and scalable method for preparing low-defect ZIF-8 tubular membranes
Xiongfu Zhang,Yaguang Liu,Lingyin Kong,Haiou Liu,Jieshan Qiu,Wei Han,Lu-Tao Weng,King Lun Yeung,Weidong Zhu +8 more
TL;DR: Substrate modification by an ultrathin ZnO layer followed by surface activation promotes homogeneous surface nucleation and the growth of a low-defect ZIF-8 tubular membrane that exhibits superb gas permeation and permselectivity as discussed by the authors.
Journal ArticleDOI
Fabrication of perovskite-type macro/mesoporous La1-xKxFeO3-δ nanotubes as an efficient catalyst for soot combustion
Fan Fang,Nengjie Feng,Lei Wang,Jie Meng,Geng Liu,Peng Zhao,Gao Pengfei,Jing Ding,Hui Wan,Guofeng Guan +9 more
TL;DR: In this paper, perovskite-type La1-xKxFeO3-δ nanotubes were prepared for efficient soot oxidation by a simple electrospinning technique following calcination.
Journal ArticleDOI
A rapid synthesis route for Sn-Beta zeolites by steam-assisted conversion and their catalytic performance in Baeyer-Villiger oxidation
TL;DR: In this paper, a steam-assisted conversion (SAC) method was used to produce pure silica Beta zeolite (Si/Sn) with 3.8% SnO 2 (i.e., Si/Sn = ǫ 2 ) at mild reaction temperature of 453 K.
References
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Journal ArticleDOI
Ordered mesoporous molecular sieves synthesized by a liquid-crystal template mechanism
TL;DR: In this paper, the synthesis of mesoporous inorganic solids from calcination of aluminosilicate gels in the presence of surfactants is described, in which the silicate material forms inorganic walls between ordered surfactant micelles.
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Nonionic Triblock and Star Diblock Copolymer and Oligomeric Surfactant Syntheses of Highly Ordered, Hydrothermally Stable, Mesoporous Silica Structures
TL;DR: In this paper, a family of highly ordered mesoporous (20−300 A) structures have been synthesized by the use of commercially available nonionic alkyl poly(ethylene oxide) (PEO) oligomeric surfactants and poly(alkylene oxide) block copolymers in acid media.
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From Microporous to Mesoporous Molecular-Sieve Materials and Their Use in Catalysis
TL;DR: Corma et al. as mentioned in this paper used the Dupont Award on new materials (1995), and the Spanish National Award “Leonardo Torres Quevedo” on Technology Research (1996) on technology research (1996), to recognize the performance of zeolites as catalysts for oil refining and petrochemistry.
Journal ArticleDOI
Mesoporous materials for drug delivery.
TL;DR: This Minireview deals with the advances in this field by the control of the textural parameters, surface functionalization, and the synthesis of sophisticated stimuli-response systems.
Journal ArticleDOI
Ordered mesoporous materials in catalysis
Akira Taguchi,Ferdi Schüth +1 more
TL;DR: In this paper, a review of the preparation of ordered mesoporous catalysts is presented, and the essential properties of the resulting materials are described in the first part of this review.