Aerogel nanocomposites of ZnO–SnO2 as efficient photocatalysts for the degradation of rhodamine B

Davis, Marauo; Hikal, Walid M.; Gümeci, Cenk; Hope‐Weeks, Louisa J.

doi:10.1039/c2cy20020a

Cited by 40 publications

(19 citation statements)

References 29 publications

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“…Most of the approaches reported to date follow the classical gelation mechanism and are summarized elsewhere. [7,[131][132][133][134] Current research in the field of the classical gelation approach to metal oxide aerogels focuses on the improvement of the electrical, [135,136] thermal, [137] and mechanical properties. [130] This alternative approach resolved the problems of the commercial availability and the difficult hydrolysis kinetics of the alkoxide precursors especially for the preparation of mixed transition metal oxide aerogels.T he method was extended to several metal oxide systems such as Al 2 O 3 ,C eO 2 ,Z nO,S nO 2 ,T iO 2 , SiO 2 ,NiO 2 ,Fe 2 O 3 ,and others.…”

Section: Gels From Oxide Nanoparticlesmentioning

confidence: 99%

“…[130] This alternative approach resolved the problems of the commercial availability and the difficult hydrolysis kinetics of the alkoxide precursors especially for the preparation of mixed transition metal oxide aerogels.T he method was extended to several metal oxide systems such as Al 2 O 3 ,C eO 2 ,Z nO,S nO 2 ,T iO 2 , SiO 2 ,NiO 2 ,Fe 2 O 3 ,and others. [7,[131][132][133][134] Current research in the field of the classical gelation approach to metal oxide aerogels focuses on the improvement of the electrical, [135,136] thermal, [137] and mechanical properties. [138] TheLeventis group in particular has made strong contributions to the field of oxidic aerogels by changing and improving the mechanical properties of the materials.…”

Section: Gels From Oxide Nanoparticlesmentioning

confidence: 99%

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Modern Inorganic Aerogels

et al. 2017

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Essentially, the term aerogel describes a special geometric structure of matter. It is neither limited to any material nor to any synthesis procedure. Hence, the possible variety of materials and therefore the multitude of their applications are almost unbounded. In fact, the same applies for nanoparticles. These are also just defined by their geometrical properties. In the past few decades nano-sized materials have been intensively studied and possible applications appeared in nearly all areas of natural sciences. To date a large variety of metal, semiconductor, oxide, and other nanoparticles are available from colloidal synthesis. However, for many applications of these materials an assembly into macroscopic structures is needed. Here we present a comprehensive picture of the developments that enabled the fusion of the colloidal nanoparticle and the aerogel world. This became possible by the controlled destabilization of pre-formed nanoparticles, which leads to their assembly into three-dimensional macroscopic networks. This revolutionary approach makes it possible to use precisely controlled nanoparticles as building blocks for macroscopic porous structures with programmable properties.

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Section: Gels From Oxide Nanoparticlesmentioning

confidence: 99%

Section: Gels From Oxide Nanoparticlesmentioning

confidence: 99%

Modern Inorganic Aerogels

et al. 2017

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“…Furthermore, to date, many SnO 2 -based coupled semiconductor composite photocatalysts, such as SnO 2 -TiO 2 [23][24][25][26], SnO 2 -ZnO [27][28][29][30][31] or SnO 2 -CuO [32] have been extensively studied for their high photocatalytic activities. But the study about SnO 2 [33][34][35][36][37] is especially less.…”

Section: Introductionmentioning

confidence: 99%

Nano-sized SnO<sub>2</sub> Photocatalysts: Synthesis, Characterization and Their Application for the Degradation of Methylene Blue Dye

2016

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In the present study, tin oxide (SnO 2 ) nanoparticles were prepared by precipitation method using tin tetrachloride (SnCl 4 ) as precursor and ammonia solution as precipitating agent followed by calcination at 400 ºC for 2 h. As-prepared SnO 2 particles were characterized by X-ray diffraction (XRD) and Fourier Transform Infrared (FTIR). The powder XRD results revealed that the SnO 2 nanoparticles had a typical tetragonal rutile (cassiterite) structure and the average crystallite size calculated by using the Debye -Scherrer equation was found to be approximately 5.1 nm. The photocatalytic activity of the as-prepared photocatalysts was investigated by degrading methylene blue (MB) dye. The effect of pH, catalyst loading and initial dye concentration on photocatalytic degradation was investigated. Results showed that the SnO 2 nanoparticles represented excellent photocatalytic activity for the degradation of MB under UV light with 200 min of irradiation time. The results also showed that the pH of solution had a direct influence on the photocatalysis process and basic pH was favorable for the degradation of MB. The effect of pH on photocatalytic activity was explained with the help of zero point charge (pH pzc ). Furthermore, the photocatalysts could be easily recycled without significant change in the catalytic activity.

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“…[3][4][5][127][128][129] Besondere Aufmerksamkeit weckte die Arbeit von Gash et al,i nd er sie Propylenoxid als einen effektiven Reaktanten zur Herstellung von Metalloxidgelen einführten, was den Bedarf der üblicherweise genutzten giftigen und teuren Alkoxidvorstufen überflüssig machte. [7,[131][132][133][134] Aktuelle Forschungen im Feld des klassischen Gelbildungsansatzes fürM etalloxidaerogele konzentrieren sich auf die Verbesserung der elektrischen, [135,136] thermischen [137] und mechanischen Eigenschaften. Die Methode wurde auf verschiedene Metalloxidsysteme wie Al 2 O 3 ,C eO 2 ,Z nO,S nO 2 ,T iO 2 ,S iO 2 ,N iO 2 und Fe 2 O 3 erweitert.…”

Section: Gele Aus Oxidnanopartikelnunclassified

“…Die Methode wurde auf verschiedene Metalloxidsysteme wie Al 2 O 3 ,C eO 2 ,Z nO,S nO 2 ,T iO 2 ,S iO 2 ,N iO 2 und Fe 2 O 3 erweitert. [7,[131][132][133][134] Aktuelle Forschungen im Feld des klassischen Gelbildungsansatzes fürM etalloxidaerogele konzentrieren sich auf die Verbesserung der elektrischen, [135,136] thermischen [137] und mechanischen Eigenschaften. [138] Durch die Veränderung und Verbesserung der mechanischen Eigenschaften hat insbesondere die Leventis-Gruppe einen wichtigen Beitrag zum Feld der oxidischen Aerogele geleistet.…”

Section: Gele Aus Oxidnanopartikelnunclassified

Moderne Anorganische Aerogele

et al. 2017

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Der Begriff Aerogel beschreibt im Wesentlichen eine besondere geometrische Struktur der Materie, die materialunabhängig ist und keinem speziellen Syntheseverfahren unterliegt. Grundsätzlich können daher Aerogele aus unzähligen Materialien bestehen, wodurch die Anwendungsmöglichkeiten nahezu unbegrenzt sind. Dasselbe trifft auf Nanopartikel zu. Diese werden ebenso durch ihre geometrischen Eigenschaften definiert. In den letzten Jahrzehnten standen daher nanoskalige Materialien im Fokus der Forschung, und es entwickelten sich mögliche Anwendungen in vielen naturwissenschaftlichen Bereichen. Heute ist eine Vielzahl an Metall‐, Halbleiter‐, Oxid‐ und anderen Nanopartikeln durch kolloidale Synthesen zugänglich. Dennoch ist es für eine Anwendung oft notwendig, dass diese Materialien zuvor in makroskopische Strukturen angeordnet werden. Dieser Aufsatz gibt eine ausführliche Übersicht über die Entwicklung, die die Welt der kolloidalen Nanopartikel und der Aerogele miteinander vereint. Ermöglicht wurde dies durch die kontrollierte Destabilisierung der vorab gebildeten Nanopartikel, die zu einer Anordnung der Nanopartikel zu einem dreidimensionalen, makroskopischen Netzwerk führt. Dieses revolutionäre Konzept verleiht die Möglichkeit, präzise kontrollierte Nanopartikel als Grundbausteine für makroskopische, poröse Strukturen mit einstellbaren Eigenschaften zu nutzen.

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Aerogel nanocomposites of ZnO–SnO2 as efficient photocatalysts for the degradation of rhodamine B

Cited by 40 publications

References 29 publications

Modern Inorganic Aerogels

Modern Inorganic Aerogels

Nano-sized SnO<sub>2</sub> Photocatalysts: Synthesis, Characterization and Their Application for the Degradation of Methylene Blue Dye

Moderne Anorganische Aerogele

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