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37 Results Found

  • Article
  • Open Access
8 Citations
4,725 Views
13 Pages

Oligomerization of Butene Mixture over NiO/Mesoporous Aluminosilicate Catalyst

  • Donggun Lee,
  • Hyeona Kim,
  • Young-Kwon Park and
  • Jong-Ki Jeon

16 October 2018

This study is aimed at preparing C8–C16 alkene through oligomerization of a butene mixture using nickel oxide supported on mesoporous aluminosilicate. Mesoporous aluminosilicate with an ordered structure was successfully synthesized from HZSM-5...

  • Article
  • Open Access
12 Citations
6,812 Views
19 Pages

Immobilization of Methyltrioxorhenium on Mesoporous Aluminosilicate Materials

  • Martina Stekrova,
  • Radka Zdenkova,
  • Martin Vesely,
  • Eliska Vyskocilova and
  • Libor Cerveny

28 March 2014

The presented report focuses on an in-depth detailed characterization of immobilized methyltrioxorhenium (MTO), giving catalysts with a wide spectra of utilization. The range of mesoporous materials with different SiO2/Al2O3 ratios, namely mesoporous...

  • Feature Paper
  • Article
  • Open Access
13 Citations
4,684 Views
27 Pages

Acetylation of Eugenol on Functionalized Mesoporous Aluminosilicates Synthesized from Amazonian Flint Kaolin

  • Alex de Nazaré de Oliveira,
  • Erika Tallyta Leite Lima,
  • Eloisa Helena de Aguiar Andrade,
  • José Roberto Zamian,
  • Geraldo Narciso da Rocha Filho,
  • Carlos Emmerson Ferreira da Costa,
  • Luíza Helena de Oliveira Pires,
  • Rafael Luque and
  • Luís Adriano Santos do Nascimento

27 April 2020

The present work was aimed to investigate the catalytic activity of a mesoporous catalyst synthesized from 3-mercaptopropyltrimethoxysilane (MPTS) functionalized Amazonian flint kaolin in the acetylation of eugenol with acetic anhydride. Materials we...

  • Article
  • Open Access
6 Citations
2,687 Views
15 Pages

Mesoporous Chromium Catalysts Templated on Halloysite Nanotubes and Aluminosilicate Core/Shell Composites for Oxidative Dehydrogenation of Propane with CO2

  • Dmitry Melnikov,
  • Ekaterina Smirnova,
  • Marina Reshetina,
  • Andrei Novikov,
  • Hongqiang Wang,
  • Evgenii Ivanov,
  • Vladimir Vinokurov and
  • Aleksandr Glotov

13 May 2023

The oxidative dehydrogenation of alkanes is a prospective method for olefins production. CO2-assisted propane dehydrogenation over metal oxide catalysts provides an opportunity to increase propylene production with collateral CO2 utilization. We prep...

  • Article
  • Open Access
11 Citations
2,544 Views
14 Pages

Photoinduced Antibacterial Activity and Cytotoxicity of CdS Stabilized on Mesoporous Aluminosilicates and Silicates

  • Anna Stavitskaya,
  • Eliza Sitmukhanova,
  • Adeliya Sayfutdinova,
  • Elnara Khusnetdenova,
  • Kristina Mazurova,
  • Kirill Cherednichenko,
  • Ekaterina Naumenko and
  • Rawil Fakhrullin

Inactivation of bacteria under the influence of visible light in presence of nanostructured materials is an alternative approach to overcome the serious problem of the growing resistance of pathogenic bacteria to antibiotics. Cadmium sulfide quantum...

  • Article
  • Open Access
12 Citations
2,704 Views
19 Pages

The Structure of Ordered Mesoporous Materials Synthesized from Aluminum Phyllosilicate Clay (Bentonite)

  • Malgorzata Zienkiewicz-Strzalka,
  • Stanislaw Pikus,
  • Malgorzata Skibinska,
  • Magdalena Blachnio and
  • Anna Derylo-Marczewska

11 March 2023

This paper reports the synthesis and structural analysis of mesoporous silica materials with the use of aluminum phyllosilicate clay (bentonite) as an alternative silica source. In the proposed synthesis, bentonite, as natural aluminosilicate, was us...

  • Article
  • Open Access
4 Citations
1,562 Views
20 Pages

The Role of Catalyst Promotive Additives and Temperature in the Hydroisodewaxing Process

  • Kamilla Abdildina,
  • Gulzira Vassilina,
  • Albina Abdrassilova,
  • Ivan A. Klassen,
  • Raigul Orynbassar and
  • Fatima Kanapiyeva

15 November 2023

One of the valuable fractions of paraffinic oils is the diesel fraction, which can be used as a commercial fuel. However, the high content of alkanes of normal structure (~10–40%) in the diesel fraction leads to a deterioration in the performan...

  • Article
  • Open Access
7 Citations
4,108 Views
11 Pages

Fe-Containing MOFs as Seeds for the Preparation of Highly Active Fe/Al-SBA-15 Catalysts in the N-Alkylation of Aniline

  • Sareena Mhadmhan,
  • Maria Dolores Marquez-Medina,
  • Antonio A. Romero,
  • Prasert Reubroycharoen and
  • Rafael Luque

24 July 2019

We have successfully incorporated iron species into mesoporous aluminosilicates (Al-SBA-15) using a simple mechanochemical milling method. The catalysts were characterized by nitrogen physisorption, inductively coupled plasma mass spectrometry (ICP-M...

  • Article
  • Open Access
41 Citations
5,084 Views
14 Pages

Ruthenium Catalysts Templated on Mesoporous MCM-41 Type Silica and Natural Clay Nanotubes for Hydrogenation of Benzene to Cyclohexane

  • Aleksandr Glotov,
  • Anna Vutolkina,
  • Aleksey Pimerzin,
  • Vladimir Nedolivko,
  • Gleb Zasypalov,
  • Valentine Stytsenko,
  • Eduard Karakhanov and
  • Vladimir Vinokurov

13 May 2020

Mesoporous ruthenium catalysts (0.74–3.06 wt%) based on ordered Mobil Composition of Matter No. 41 (MCM-41) silica arrays on aluminosilicate halloysite nanotubes (HNTs), as well as HNT-based counterparts, were synthesized and tested in benzene...

  • Article
  • Open Access
18 Citations
7,299 Views
14 Pages

18 August 2014

Ordered mesoporous SBA-15 analogs with different Si/Al ratios were successfully prepared in a two-step process from self-assembly of ZSM-5 nanoseeds at high temperature in mildly acidic media (473 K, pH 3.5). The obtained products were characterized...

  • Article
  • Open Access
2 Citations
3,029 Views
17 Pages

A Novel Artificial Hemoglobin Carrier Based on Heulandite-Calcium Mesoporous Aluminosilicate Particles

  • Dino Jordanoski,
  • Damjana Drobne,
  • Neža Repar,
  • Iztok Dogsa,
  • Polona Mrak,
  • Romana Cerc-Korošec,
  • Andrijana Sever Škapin,
  • Peter Nadrah and
  • Natasa Poklar Ulrih

Tetraethyl-orthosilicate (TEOS)-based nanoparticles are most extensively used as a silica-based hemoglobin carrier system. However, TEOS-based nanoparticles induce adverse effects on the hemoglobin structure. Therefore, a heulandite-calcium-based car...

  • Article
  • Open Access
30 Citations
5,600 Views
25 Pages

Metal Oxide Nanoparticles Supported on Macro-Mesoporous Aluminosilicates for Catalytic Steam Gasification of Heavy Oil Fractions for On-Site Upgrading

  • Daniel López,
  • Lady J. Giraldo,
  • Juan P. Salazar,
  • Dioni M. Zapata,
  • Diana C. Ortega,
  • Camilo A. Franco and
  • Farid B. Cortés

29 October 2017

Catalytic steam gasification of extra-heavy oil (EHO) fractions was studied using functionalized aluminosilicates, with NiO, MoO3, and/or CoO nanoparticles with the aim of evaluating the synergistic effect between active phase and the support in heav...

  • Article
  • Open Access
18 Citations
3,231 Views
17 Pages

15 June 2022

In this study, three solid acid catalysts, namely mesoporous aluminophosphate-supported 12-tungstophosphoric heteropoly acid (HPW/MAP), mesoporous aluminosilicate-supported 12-tungstophosphoric heteropoly acid (HPW/MAS), and gamma alumina-supported 1...

  • Article
  • Open Access
5 Citations
3,066 Views
12 Pages

Aluminosilicates Catalysts Synthesis from Low-Grade Indonesian Kaolin for the Acetalization Reaction

  • Hartati Hartati,
  • Qurrota A’yuni,
  • Nastiti Heru Saputri,
  • Dea Zaqiatul Mardho,
  • Putri Bintang Dea Firda,
  • Hartono Hartono,
  • Hasliza Bahruji,
  • Reva Edra Nugraha,
  • Novia Amalia Sholeha and
  • Didik Prasetyoko

5 January 2023

Aluminosilicate and ZSM-5 catalyst were synthesized from local materials, low-grade Indonesian kaolin. High quartz impurities content in the low-grade kaolin was successfully reduced by the consecutive treatment process including washing, centrifugat...

  • Feature Paper
  • Article
  • Open Access
5 Citations
3,581 Views
15 Pages

Influence of Remaining Acid Sites of an Amorphous Aluminosilicate on the Oligomerization of n-Butenes after Impregnation with Nickel Ions

  • Fabian Nadolny,
  • Felix Alscher,
  • Stephan Peitz,
  • Ekaterina Borovinskaya,
  • Robert Franke and
  • Wladimir Reschetilowski

21 December 2020

Highly linear octene isomers can be produced from n-butene on industrial scale by using Ni-containing aluminosilicates as heterogeneous catalysts. These catalysts can be prepared by impregnating an aluminosilicate with a Ni(II) salt solution. This le...

  • Article
  • Open Access
18 Citations
4,019 Views
15 Pages

4 August 2018

Zeolites are microporous crystalline aluminosilicates with a number of useful properties including acidity, hydrothermal stability, and structural selectivity. However, the exclusive presence of micropores restricts diffusive mass transport and reduc...

  • Proceeding Paper
  • Open Access
1,717 Views
7 Pages

NH4F Modified Al-SBA-15 Materials for Esterification of Valeric Acid to Alkyl Valerates

  • Miguel Blanco-Sánchez,
  • Ana Franco,
  • Antonio Pineda,
  • Alina Balu,
  • Antonio Romero and
  • Rafael Luque

Al-SBA-15 materials were functionalized by ball milling with several niobium loadings (0.25–1 wt.%) and/or with several F- loadings, using NH4F as a precursor. The catalysts synthesized in this study were characterised by X-ray diffraction (XRD), N2...

  • Article
  • Open Access
9 Citations
4,019 Views
18 Pages

2 February 2019

Zeolites are micro- and mesoporous aluminosilicate minerals (both natural and industrially produced) widely used as catalysts and sorbents in domestic and commercial water purification and separation technologies. Their ability to selectively adsorb...

  • Feature Paper
  • Article
  • Open Access
13 Citations
4,090 Views
16 Pages

5 February 2023

Controlling the particle size as well as porosity and shape of silica nanoparticles is always a big challenge while tuning their properties. Here, we designed a cost-effective, novel, green synthetic method for the preparation of perforated hollow me...

  • Article
  • Open Access
10 Citations
2,895 Views
15 Pages

Acid Resistance and Ion-Exchange Capacity of Natural Mixtures of Heulandite and Chabazite

  • Vladimer Tsitsishvili,
  • Marinela Panayotova,
  • Nato Mirdzveli,
  • Nagima Dzhakipbekova,
  • Vladko Panayotov,
  • Nanuli Dolaberidze and
  • Manana Nijaradze

4 March 2023

The recovery and immobilization of metals from wastewater often occurs in an acidic environment that destroys the structure of adsorbents such as zeolites, which are porous crystalline aluminosilicates. The influence of hydrochloric acid solutions on...

  • Article
  • Open Access
10 Citations
5,840 Views
14 Pages

Dehydration of Fructose to 5-Hydroxymethylfurfural: Effects of Acidity and Porosity of Different Catalysts in the Conversion, Selectivity, and Yield

  • João Pedro Vieira Lima,
  • Pablo Teles Aragão Campos,
  • Mateus Freitas Paiva,
  • José J. Linares,
  • Sílvia C. L. Dias and
  • José A. Dias

12 October 2021

There is a demand for renewable resources, such as biomass, to produce compounds considered as platform molecules. This study deals with dehydration of fructose for the formation of 5-hydroxymethylfurfural (HMF), a feedstock molecule. Different catal...

  • Article
  • Open Access
1 Citations
2,392 Views
15 Pages

Reversible Redox Property of Co(III) in Amorphous Co-doped SiO2/γ-Al2O3 Layered Composites

  • Shotaro Tada,
  • Shota Saito,
  • Akito Mori,
  • Hideki Mizuno,
  • Shiori Ando,
  • Toru Asaka,
  • Yusuke Daiko,
  • Sawao Honda,
  • Samuel Bernard and
  • Yuji Iwamoto

25 November 2020

This paper reports on a unique reversible reducing and oxidizing (redox) property of Co(III) in Co-doped amorphous SiO2/γ-Al2O3 composites. The Fenton reaction during the H2O2-catalyzed sol–gel synthesis utilized in this study lead to the...

  • Article
  • Open Access
8 Citations
2,702 Views
19 Pages

17 June 2022

Realizing the green recycling of sludge is an important link to effectively solve the problem of sludge disposal. In this paper, sewage sludge (SS) and rice husk (RH) were utilized as raw materials in preparing novel ceramsite (SRC) for the treatment...

  • Article
  • Open Access
13 Citations
3,266 Views
19 Pages

Synthesis and Characterization of Hierarchical Zeolites Modified with Polysaccharides and Its Potential Role as a Platform for Drug Delivery

  • Agata Wawrzyńczak,
  • Izabela Nowak,
  • Natalia Woźniak,
  • Jagoda Chudzińska and
  • Agnieszka Feliczak-Guzik

Hierarchical zeolites are aluminosilicates with a crystal structure, which next to the micropores possess secondary porosity in the range of mesopores and/or small macropores. Due to their ordered structure and additional secondary porosity, they hav...

  • Article
  • Open Access
28 Citations
4,590 Views
33 Pages

Acetylation of Eugenol over 12-Molybdophosphoric Acid Anchored in Mesoporous Silicate Support Synthesized from Flint Kaolin

  • Alex de Nazaré de Oliveira,
  • Erika Tallyta Leite Lima,
  • Deborah Terra de Oliveira,
  • Rômulo Simões Angélica,
  • Eloisa Helena de Aguiar Andrade,
  • Geraldo Narciso da Rocha Filho,
  • Carlos Emmerson Ferreira da Costa,
  • Fabiola Fernandes Costa,
  • Rafael Luque and
  • Luís Adriano Santos do Nascimento

16 September 2019

A new prepared catalyst, 12-molybdophosphoric acid (HPMo) anchored to the mesoporous aluminosilicate AlSiM, synthesized from Amazon kaolin, was characterized and used as a heterogeneous acid catalyst for the production of eugenyl acetate by acetylati...

  • Article
  • Open Access
11 Citations
4,217 Views
13 Pages

Mechanochemically Synthesized Supported Magnetic Fe-Nanoparticles as Catalysts for Efficient Vanillin Production

  • María Dolores Márquez-Medina,
  • Daily Rodríguez-Padrón,
  • Alina M. Balu,
  • Antonio A. Romero,
  • Mario J. Muñoz-Batista and
  • Rafael Luque

21 March 2019

Magnetically separable nanocatalysts were synthesized by incorporating iron nanoparticles on a mesoporous aluminosilicate (Al-SBA-15) through a mechanochemical grinding pathway in a single step. Noticeably, magnetic features were achieved by employin...

  • Article
  • Open Access
825 Views
20 Pages

Uptake of Copper and Zinc Ions by Georgian Natural Heulandite and Resulting Changes in Its Chemical Composition and Structure

  • Vladimer Tsitsishvili,
  • Marinela Panayotova,
  • Nato Mirdzveli,
  • Vladko Panayotov,
  • Nanuli Dolaberidze,
  • Manana Nijaradze,
  • Zurab Amiridze and
  • Bela Khutsishvili

25 August 2025

Extraction of metal ions from polluted waters and immobilization of metals in contaminated soils can be conducted using zeolites—porous aluminosilicate ion exchangers. The uptake of copper and zinc ions by the Georgian natural heulandite was st...

  • Article
  • Open Access
14 Citations
4,161 Views
18 Pages

Alkali-Activated Materials as Catalysts for Water Purification

  • Anne Heponiemi,
  • Janne Pesonen,
  • Tao Hu and
  • Ulla Lassi

23 May 2021

In this study, novel and cost-effective alkali-activated materials (AAMs) for catalytic applications were developed by using an industrial side stream, i.e., blast furnace slag (BFS). AAMs can be prepared from aluminosilicate precursors under mild co...

  • Article
  • Open Access
4 Citations
2,661 Views
19 Pages

Novel 3D-Printed Biocarriers from Aluminosilicate Materials

  • Eleni Anna Economou,
  • Savvas Koltsakidis,
  • Ioanna Dalla,
  • Konstantinos Tsongas,
  • George Em. Romanos,
  • Dimitrios Tzetzis,
  • Polycarpos Falaras,
  • George Theodorakopoulos,
  • Vesna Middelkoop and
  • Themistoklis Sfetsas

5 July 2023

The addition of biocarriers can improve biological processes in bioreactors, since their surface allows for the immobilization, attachment, protection, and growth of microorganisms. In addition, the development of a biofilm layer allows for the colon...

  • Article
  • Open Access
1,942 Views
19 Pages

Novel Catalysts Based on Synthetic Mesoporous Silicates of the MCM-41 Type and Hydroxyapatite for Desulfurization of Model Fuel

  • Nadezhda O. Donskaya,
  • Margarita A. Goldberg,
  • Alexander S. Fomin,
  • Anna O. Koptelova,
  • Polina D. Domashkina,
  • Ekaterina A. Eseva,
  • Olga S. Antonova,
  • Anatoliy A. Konovalov,
  • Alexander V. Leonov and
  • Egor A. Kudryavtsev
  • + 5 authors

Nanopowders of hydroxyapatite (HA) and Fe-substituted hydroxyapatite (HAFe) were synthesized by wet precipitation on either MCM-41 (a synthetic, mesoporous aluminosilicate material) or an aluminum-containing MCM-41 (AlMCM) support. According to X-ray...

  • Article
  • Open Access
14 Citations
3,940 Views
14 Pages

Synthesis and Application of H-ZSM-5 Zeolites with Different Levels of Acidity as Synergistic Agents in Flame Retardant Polymeric Materials

  • Felipe Reis Bernardes,
  • Michelle Jakeline Cunha Rezende,
  • Victor de Oliveira Rodrigues,
  • Regina Sandra Veiga Nascimento and
  • Simone Pereira da Silva Ribeiro

16 December 2019

Several studies show a synergistic effect between intumescent formulations and aluminosilicates, such as zeolites and clays, but little is known about the effect of acidity of these additives on the synergistic action. In this work, H-ZSM-5 zeolite w...

  • Article
  • Open Access
78 Citations
8,315 Views
12 Pages

Characterization of Zeolite in Zeolite-Geopolymer Hybrid Bulk Materials Derived from Kaolinitic Clays

  • Hayami Takeda,
  • Shinobu Hashimoto,
  • Hiroaki Yokoyama,
  • Sawao Honda and
  • Yuji Iwamoto

6 May 2013

Zeolite-geopolymer hybrid materials have been formed when kaolin was used as a starting material. Their characteristics are of interest because they can have a wide pore size distribution with micro- and meso-pores due to the zeolite and geopolymer,...

  • Article
  • Open Access
5 Citations
2,502 Views
20 Pages

22 February 2024

Shrinkage during hardening and curing is one of the largest challenges for the widespread application of metakaolin-based geopolymers (MKGs). To solve this problem, a silane coupling agent (SCA) and waterborne epoxy resin (WER) were used to synthesiz...

  • Article
  • Open Access
13 Citations
5,272 Views
15 Pages

Research on the formulation of estolides from plant seed oils has attracted substantial attention due to their favorable low-temperature properties and environmentally friendly nature. The present research investigates the formulation of canola biodi...

  • Article
  • Open Access
44 Citations
4,089 Views
16 Pages

Revealing the Influence of Microparticles on Geopolymers’ Synthesis and Porosity

  • Dumitru Doru Burduhos Nergis,
  • Petrica Vizureanu,
  • Ioan Ardelean,
  • Andrei Victor Sandu,
  • Ofelia Cornelia Corbu and
  • Ecaterina Matei

18 July 2020

Geopolymers are zeolites like structures based on hydrated aluminosilicates units of SiO4 and AlO4. These units, known as poly(sialate), poly(sialate)-siloxo or poly(sialate)-disiloxo are chemically balanced by the group I cations of K+, Li+, or Na+....

  • Article
  • Open Access
15 Citations
4,029 Views
13 Pages

Modified Alkali Activated Zeolite Foams with Improved Textural and Mechanical Properties

  • Kateřina Hrachovcová,
  • Zdeněk Tišler,
  • Eliška Svobodová and
  • Jan Šafář

25 May 2020

Natural zeolites are crystalline hydrated alkali metal and alkaline earth metal aluminosilicates with unique ion-exchange and sorption properties. The exceptional structure of pores gives natural zeolites several application possibilities, especially...