Ordered meso-/macroporous silica and titania films by breath figure templating in combination with non-hydrolytic sol–gel processing

Feinle, Andrea; Akbarzadeh, Johanna; Peterlik, Herwig; Hüsing, Nicola

doi:10.1016/j.micromeso.2015.06.043

Cited by 7 publications

(4 citation statements)

References 26 publications

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“…Among the available porous materials use for catalysis, mesoporous materials have attracted growing interest, owing to their fascinating properties such as tunable large pore sizes, large pore volumes, alternative pore shapes, high surface areas and controllable framework compositions (Feinle et al, 2015;Schmit et al, 2015;Yu et al, 2015). According to International Union of Pure and Applied Chemistry (IUPAC), mesoporous materials are materials possessing pore dimensions between 2 to 50 nm, that is between micro-pores and macropores in size.…”

Section: Mesoporous Catalyst In the Transesterification Reactionmentioning

confidence: 99%

Synthesis of mesoporous calcium titanate catalyst for transesterification of used cooking oil: A review of the synthesized potential

Yahya¹,

Ngadi²

2020

Int. j. adv. appl. sci.

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Biodiesel is a promising alternative for conventional diesel fuel due to the unsustainable feature of the resources and unstable price of the fuels. However, the production cost is higher compared to the conventional ones and is significantly contributed from the feedstock. Realizing that a large portion of used cooking oil (UCO) is generated daily, this review aims to investigate and explore the production of biodiesel from UCO. In the production reaction process, undoubtedly, the catalyst plays an important role. It has been shown that calcium oxide (CaO) is one of the best heterogeneous basic catalysts in the transesterification reaction for biodiesel production. However, the catalyst has a low surface area which restricts the active basic sites to disperse on the catalyst surface. Moreover, CaO catalyst faces leaching problem, poor stability, and porosity which hinder its catalytic activity and reusability. Therefore, in this study, it is aimed to review the potential of titanium as a support catalyst to modify CaO supported titanium with a mesoporous structure (mesoporous calcium titanate) by a sol-gelhydrothermal method to overcome the limitations of CaO catalyst.

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Section: Mesoporous Catalyst In the Transesterification Reactionmentioning

confidence: 99%

Synthesis of mesoporous calcium titanate catalyst for transesterification of used cooking oil: A review of the synthesized potential

Yahya¹,

Ngadi²

2020

Int. j. adv. appl. sci.

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“… Beispiele für SiO 2 mit unterschiedlichen Porenstrukturen. Links: geordnete Mesoporen (Aufsicht auf hexagonal gepackte, parallel liegende Röhren) hergestellt mit Hilfe selbstorganisierter Tensid‐Anordnungen als Templat [10]; Mitte: regelmäßig angeordnete Makroporen hergestellt mit Eiskristallen als Templat („ice templating“) (Aufsicht auf parallel angeordnete Röhren) [11]; Rechts: Makroporen hergestellt mit Hilfe von Wassertröpfchen‐Strukturen als Templat, die durch Anhauchen einer kalten Oberfläche entstehen („breath figures“) [12]. …”

Section: Neue Eigenschaften Durch Variation Der Erscheinungsformunclassified

Neue Materialien

Schubert

2020

Chemie in nserer Zeit

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Zusammenfassung Für Eigenschaften und damit Anwendungen von Materialien spielt nicht nur die chemische Zusammensetzung eine entscheidende Rolle, sondern auch strukturelle Parameter wie Kristallinität, Porosität, Dimensionalität oder makroskopische Form. „Neue Materialien“ sind durch die zielgerichtete Erschließung neuer Materialgruppen charakterisiert. Als Beispiele dafür werden Perowskite, metallorganische Gerüstverbindungen (MOF), metallische Gläser und anorganisch‐organische Hybridmaterialien exemplarisch diskutiert. Am Beispiel SiO2 wird gezeigt, wie bei Materialsynthesen verschiedene Methoden zum Einsatz kommen müssen, um unterschiedliche Erscheinungsformen der gleichen chemischen Verbindung zu erhalten. Eine herausfordernde Zukunftsaufgabe ist die Entwicklung von Materialsystemen, bei denen die Einzelkomponenten synergetisch zusammenwirken, um Eigenschaften oder Eigenschaftskombinationen zu erzielen, die über jene der Einzelkomponenten in nicht‐trivialer Weise hinausgehen.

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“…Feinle et al. [ 76 ] demonstrated the formation of meso‐/micro‐porous silica and Titania materials. The BF method was combined with non‐hydrolytic sol–gel processing.…”

Section: Honeycomb Silica Films Formationmentioning

confidence: 99%

Bio‐Inspired Silica Films Combining Block Copolymers Self‐Assembly and Soft Chemistry: Paving the Way toward Artificial Exosqueleton of Seawater Diatoms

Álvarez

Marcasuzaa

Billon

2020

Macromol. Rapid Commun.

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This review is in line with the principles of bio‐inspiration and biomimicry in order to envisage a softer and more environmentally friendly chemistry. Here, the source of inspiration is a microalga from the oceans with the ability to build an exoskeleton of silica under ambient conditions. Following this model, this review is interested in different ways of creating porous silica films with a hierarchical porosity similar to diatoms. For this purpose, polymeric/hybrid/inorganic films structured in honeycomb using the breath figure method are reported. This versatile and easy to implement method based on the principle of rapid evaporation of a solvent in a humid atmosphere is widely used in the formation of structured films with micron‐sized pores. In addition to this, the self‐assembly of copolymer at the nanoscale can be addressed to obtain a hierarchically structured film. Following this structuration step, the degradation of a sacrificial block is then described from the most energy‐intensive to soft process, allowing an added nanoporosity to the micron porosity of the BF method. Finally, hierarchical porous silica films are described using the sol–gel process, which is known as a soft chemistry process.

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Ordered meso-/macroporous silica and titania films by breath figure templating in combination with non-hydrolytic sol–gel processing

Cited by 7 publications

References 26 publications

Synthesis of mesoporous calcium titanate catalyst for transesterification of used cooking oil: A review of the synthesized potential

Synthesis of mesoporous calcium titanate catalyst for transesterification of used cooking oil: A review of the synthesized potential

Neue Materialien

Bio‐Inspired Silica Films Combining Block Copolymers Self‐Assembly and Soft Chemistry: Paving the Way toward Artificial Exosqueleton of Seawater Diatoms

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