Modulation of the photocatalytic activity and crystallinity of F-TiO2 nanoparticles by using green natural carboxylic acids
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F22%3A00127226" target="_blank" >RIV/00216224:14310/22:00127226 - isvavai.cz</a>
Výsledek na webu
<a href="https://pubs.rsc.org/en/content/articlelanding/2022/ce/d2ce00699e" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2022/ce/d2ce00699e</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d2ce00699e" target="_blank" >10.1039/d2ce00699e</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Modulation of the photocatalytic activity and crystallinity of F-TiO2 nanoparticles by using green natural carboxylic acids
Popis výsledku v původním jazyce
Ultrareactive F-doped crystalline mesoporous aggregates of titanium dioxide nanoparticles have been synthesized by the acidic hydrolysis of a titanium precursor with different aqueous acidic solutions of organic acids, namely, ascorbic acid (AA), citric acid (CA), benzoic acid (BA) and salicylic acid (SA). The nanomaterials obtained were characterized by different techniques observing, in all cases, that they consist of crystalline mesoporous aggregates of anatase nanoparticles with ultrareactive {001} facets (promoted by F doping) and surface areas of up to ca. 75 m2 g−1. The present study has demonstrated that the use of the “green reagent” ascorbic acid generates titanium dioxide-based systems with superior activity compared with those obtained with other organic acids or HNO3 under the same experimental conditions. The anatase-based nanomaterials obtained when using ascorbic acid are able to photocatalytically degrade up to 92% of a concentrated solution of methylene blue (MB) in 15 min, and common emerging pollutants such as ciprofloxacin and naproxen (87% and 76% degradation, respectively) under UV light (300 W) in 15 min. The photocatalytic activity of the ascorbic acid-promoted systems appears to be associated with differences in the crystallinity of the system promoted by the presence of carbon species on the surface of the material, which are formed even after calcination. Finally, doping the anatase-based nanomaterials with palladium nanoparticles makes them effective heterogeneous catalysts with good to excellent halide conversions (between 60 and 99% for the formation of biphenyl derivatives), yields of up to 40% and a good degree of recyclability in Suzuki–Miyaura C–C coupling at short reaction times and very low loading of Pd.
Název v anglickém jazyce
Modulation of the photocatalytic activity and crystallinity of F-TiO2 nanoparticles by using green natural carboxylic acids
Popis výsledku anglicky
Ultrareactive F-doped crystalline mesoporous aggregates of titanium dioxide nanoparticles have been synthesized by the acidic hydrolysis of a titanium precursor with different aqueous acidic solutions of organic acids, namely, ascorbic acid (AA), citric acid (CA), benzoic acid (BA) and salicylic acid (SA). The nanomaterials obtained were characterized by different techniques observing, in all cases, that they consist of crystalline mesoporous aggregates of anatase nanoparticles with ultrareactive {001} facets (promoted by F doping) and surface areas of up to ca. 75 m2 g−1. The present study has demonstrated that the use of the “green reagent” ascorbic acid generates titanium dioxide-based systems with superior activity compared with those obtained with other organic acids or HNO3 under the same experimental conditions. The anatase-based nanomaterials obtained when using ascorbic acid are able to photocatalytically degrade up to 92% of a concentrated solution of methylene blue (MB) in 15 min, and common emerging pollutants such as ciprofloxacin and naproxen (87% and 76% degradation, respectively) under UV light (300 W) in 15 min. The photocatalytic activity of the ascorbic acid-promoted systems appears to be associated with differences in the crystallinity of the system promoted by the presence of carbon species on the surface of the material, which are formed even after calcination. Finally, doping the anatase-based nanomaterials with palladium nanoparticles makes them effective heterogeneous catalysts with good to excellent halide conversions (between 60 and 99% for the formation of biphenyl derivatives), yields of up to 40% and a good degree of recyclability in Suzuki–Miyaura C–C coupling at short reaction times and very low loading of Pd.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Návaznosti výsledku
Projekt
—
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2022
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
CrystEngComm
ISSN
1466-8033
e-ISSN
1466-8033
Svazek periodika
24
Číslo periodika v rámci svazku
37
Stát vydavatele periodika
GB - Spojené království Velké Británie a Severního Irska
Počet stran výsledku
14
Strana od-do
6454-6467
Kód UT WoS článku
000832538200001
EID výsledku v databázi Scopus
2-s2.0-85135233922