Physical; Nanoscience & Nanotechnology; Materials Science

Accordion-like effect of flexible organic structure-directing agents in the synthesis of ferrierite zeolite

Authors: Almeida, RKS; Perez-Pariente, J; Gomez-Hortiguela, L

Article.
Microporous Mesoporous Mat.. vol: 300. page: 1387-1811.
Date: jun-15. 2020.
Doi: 10.1016/j.micromeso.2020.110149.

Abstract:
Ferrierite zeolite was synthesized by a co-structure-directing route using a highly flexible diquaternary ammonium cation (N,N’-bis-triethylpentanediyldiammonium) as a structure directing agent in combination with tetramethylammonium as a small co-structure-directing agent. Strong alterations of the C-13 NMR bands of the bulky organic [leer más]

Highly efficient multi-metal catalysts for carbon dioxide reduction prepared from atomically sequenced metal organic frameworks

Authors: Castillo-Blas, C; Alvarez-Galvan, C; Puente-Orench, I; Garcia-Sanchez, A; Oropeza, FE; Gutierrez-Puebla, E; Monge, A; de la Pena-O’Shea, VA; Gandara, F

Article; Early Access.
Nano Res.. vol: . page: 1998-0124.
Date: . .
Doi: 10.1007/s12274-020-2813-x.

Abstract:
The precise control on the combination of multiple metal atoms in the structure of metal-organic frameworks (MOFs) endowed by reticular chemistry, allows the obtaining of materials [leer más]

Mineralizer effects on the physicochemical and catalytic properties of AlMCM-41 mesoporous materials

Authors: Ng, EP; Abdullahi, H; Khoerunnisa, F; Maireles-Torres, P; Lee, HL; Adam, F; Ling, TC; Wong, KL

Article.
Microporous Mesoporous Mat.. vol: 297. page: 1387-1811.
Date: may-01. 2020.
Doi: 10.1016/j.micromeso.2020.110016.

Abstract:
The effects of various alkali metal hydroxide mineralizers (LiOH, NaOH, KOH and CsOH) on the formation of AlMCM-41 mesoporous materials were investigated. The ordering of mesostructure was reduced when stronger base [leer más]

Performance of three different cations based on imidazolium ring as structure directing agents in the synthesis of aluminophosphates and silicoaluminophosphates microporous materials

Authors: Almeida, G; Variani, YM; Gomez-Hortiguela, L; Mercury, JMR; Rojas, A

Article.
Microporous Mesoporous Mat.. vol: 294. page: 1387-1811.
Date: mar-01. 2020.
Doi: 10.1016/j.micromeso.2019.109861.

Abstract:
In this work three different cations based on imidazolium rings, 2-ethyl-1,3,4-trimethylimidazolium (2E134TMI), 1,2,3-triethyl-4-methylimidazolium (123TE4MI) and 1,2,3-triethylimidazolium (123TEI), were employed as structure directing agents (SDA) for the synthesis of aluminophosphate and silicoaluminophosphate microporous materials. The cations allowed the [leer más]

Relative Stability of Near -Surface Oxygen Vacancies at the CeO2(111) Surface upon Zirconium Doping

Authors: Otero, GS; Lustemberg, PG; Prado, F; Ganduglia-Pirovano, MV

Article.
J. Phys. Chem. C. vol: 124. page: 1932-7447.
Date: JAN 9. 2020.
Doi: 10.1021/acs.jpcc.9b09433.

Abstract:
The effects of Zr doping on the stability of the CeO2(111) surface as a function of the dopant concentration and distribution, as well as on the relative stability of surface and subsurface oxygen vacancies, were studied by [leer más]

Direct sulfation of a Zr-based metal-organic framework to attain strong acid catalysts

Authors: Fernandez-Morales, JM; Lozano, LA; Castillejos-Lopez, E; Rodriguez-Ramo, I; Guerrero-Ruiz, A; Zamaro, JM

Article.
Microporous Mesoporous Mat.. vol: 290. page: 1387-1811.
Date: DEC. 2019.
Doi: 10.1016/j.micromeso.2019.109686.

Abstract:
The application of Metal-Organic Frameworks (MOFs) in gas phase heterogeneous catalysis is still not widely spread because of their limited stability under reaction conditions. Obtaining stable acidic MOFs to be used in reactions that demand [leer más]

Ultrasmall Cs-AlMCM-41 basic catalysts: Effects of aluminum addition on their physico-chemical and catalytic properties

Authors: Ng, EP; Abdullahi, H; Wong, KL; Gines-Molina, MJ; Maireles-Torres, P; Rigolet, S; Daou, TJ; Chia, S; Lee, HL

Article.
Microporous Mesoporous Mat.. vol: 288. page: 1387-1811.
Date: nov-01. 2019.
Doi: 10.1016/j.micromeso.2019.109599.

Abstract:
In this study, ultra-small MCM-41 mesoporous solids (< 30 nm) were synthesized using colloidal silica and cesium hydroxide as cheap silica source and mineralize; respectively. Four samples with a [leer más]

Conformational sieving effect of organic structure-directing agents during the synthesis of zeolitic materials

Authors: Nieto, D; Perez-Pariente, J; Toran, E; Lopez-Arbeloa, F; Gomez-Hortiguela, L

Article.
Microporous Mesoporous Mat.. vol: 287. page: 1387-1811.
Date: OCT. 2019.
Doi: 10.1016/j.micromeso.2019.05.052.

Abstract:
In this work we find a novel conformational sieving effect during the structure-direction of two chiral organic diastereoisomers, (1R,2S)-benzyl-ephedrine and (1S,2S)-benzyl-pseudoephedrine, during the synthesis of zeolitic aluminophosphates. Protonation of each diastereoisomer can take place through two different [leer más]

A Novel Approach to High-Performance Aliovalent-Substituted Catalysts-2D Bimetallic MOF-Derived CeCuOx Microsheets

Authors: Wang, QY; Li, ZM; Banares, MA; Weng, LT; Gu, QF; Price, J; Han, W; Yeung, KL

Article.
Small. vol: 15. page: 1613-6810.
Date: OCT. 2019.
Doi: 10.1002/smll.201903525.

Abstract:
Mixed transition metal oxides (MTMOs) have enormous potential applications in energy and environment. Their use as catalysts for the treatment of environmental pollution requires further enhancement in activity and stability. This work presents [leer más]

Highly accessible aqueous synthesis of well-dispersed dendrimer type platinum nanoparticles and their catalytic applications

Authors: Fernandez-Lodeiro, A; Djafari, J; Lopez-Tejedor, D; Perez-Rizquez, C; Rodriguez-Gonzalez, B; Capelo, JL; Palomo, JM; Lodeiro, C; Fernandez-Lodeiro, J

Article.
Nano Res.. vol: 12. page: 1998-0124.
Date: MAY. 2019.
Doi: 10.1007/s12274-019-2350-7.

Abstract:
The application of novel methodologies to the synthesis of nanomaterials is still a challenge in many different technological and scientific fields. New efficient and reproducible synthetic methodologies, that produce fewer [leer más]

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