Ambient-temperature porogen-free method for preparation of silica-based macroporous materials

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F22%3A43925009" target="_blank" >RIV/60461373:22310/22:43925009 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22330/22:43925009 RIV/60461373:22340/22:43925009

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0927775721019026?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0927775721019026?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.colsurfa.2021.128033" target="_blank" >10.1016/j.colsurfa.2021.128033</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ambient-temperature porogen-free method for preparation of silica-based macroporous materials

Popis výsledku v původním jazyce

The presented work focuses on the synthesis of silica-based macroporous aggregates composed of silica nano-particles using a template-free method. To improve the mechanical strength of the prepared fractal-like aggregates, the silica precursor tetraethyl orthosilicate (TEOS) is used during nanoparticle aggregation. The obtained results confirm the possibility to tailor the pore size distribution (PSD) simply by using primary particles of various sizes. The prepared porous materials have a porosity ranging from 60% to 74% with a specific surface area between 10 and 200 m(2)/g and an average pore diameter from 30 to 1300 nm. Functionalization of the aggregate surface was done by replacing part of TEOS with a silica precursor that contained desired functional groups. This was demonstrated by preparing macroporous aggregates with carboxyl, amine and epoxy functional groups. The application of prepared aggregates was demonstrated by immobilization of urease from Canavalia ensiformis resulting in high enzyme activity compare to free enzymes.

Název v anglickém jazyce

Ambient-temperature porogen-free method for preparation of silica-based macroporous materials

Popis výsledku anglicky

The presented work focuses on the synthesis of silica-based macroporous aggregates composed of silica nano-particles using a template-free method. To improve the mechanical strength of the prepared fractal-like aggregates, the silica precursor tetraethyl orthosilicate (TEOS) is used during nanoparticle aggregation. The obtained results confirm the possibility to tailor the pore size distribution (PSD) simply by using primary particles of various sizes. The prepared porous materials have a porosity ranging from 60% to 74% with a specific surface area between 10 and 200 m(2)/g and an average pore diameter from 30 to 1300 nm. Functionalization of the aggregate surface was done by replacing part of TEOS with a silica precursor that contained desired functional groups. This was demonstrated by preparing macroporous aggregates with carboxyl, amine and epoxy functional groups. The application of prepared aggregates was demonstrated by immobilization of urease from Canavalia ensiformis resulting in high enzyme activity compare to free enzymes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20401 - Chemical engineering (plants, products)

Projekt

<a href="/cs/project/GA16-22997S" target="_blank" >GA16-22997S: Příprava porézních materiálú pomocí kontrolovaného uspořádání nanočástic</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Colloids and Surfaces A: Physicochemical and Engineering Aspects

ISSN

0927-7757

e-ISSN

1873-4359

Svazek periodika

634

Číslo periodika v rámci svazku

FEB 5 2022

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

128033

Kód UT WoS článku

000730865600005

EID výsledku v databázi Scopus

2-s2.0-85120619979