White Photoluminescence from Carbon-Incorporated Silica Fabricated from Rice Husk

Ishikawa, Yukari; Kawasaki, Shigeo; Ishi, Yosuke; Sato, Kōji; Matsumura, Akihiro

doi:10.7567/jjap.51.01ak02

Cited by 6 publications

(8 citation statements)

References 13 publications

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“…The fabricated carbon/silica nanocomposites can serve as precursors for high‐quality ceramic materials, such as silicon carbide and silicon nitride . In addition, carbon/silica nanocomposites prepared by carbonization in air at a certain temperature have also attracted attention . This is due to the fact that the unfunctionalized carbon (or free carbon) in the product can be removed in air, and therefore the functionalities generated by the chemical combination of carbon and silica could be prominent .…”

Section: Nanostructures From Rhsmentioning

confidence: 99%

“…The PL of the above RH‐NSs is dependent on the synthesis conditions, and sensitive to the surrounding environment. For example, the PL of silica nanocomposites with chemically incorporated carbon is largely dependent on the reaction temperature (with 600 °C as the optimal temperature) . This is due to the fact that a higher reaction temperature would destroy the chemical bonds between carbon and silica while a lower temperature would produce a large amount of free carbon in the nanocomposites, which would greatly quench the PL by absorbing the incident light.…”

Section: Properties Of Rh‐nssmentioning

confidence: 99%

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Versatile Nanostructures from Rice Husk Biomass for Energy Applications

et al. 2018

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Converting biomass into valuable products has great benefits in terms of both economic and environmental considerations, and has attracted considerable attention in recent years. Rice husk biomass was initially utilized to produce bulk materials for conventional applications while a variety of advanced nanostructures (NSs) have been fabricated over the past few years. In addition to their low cost and environmental friendliness, RH-derived NSs (RH-NSs) exhibit versatile properties, which are promising for broad applications in various fields. In this Review, we summarize the latest research on RH-NSs, covering their design, fabrication, properties, and applications in the modern energy field. Based on the unique structure and components of RHs, a series of carbon/silicon-based novel NSs with outstanding performances have been exploited, which are difficult to be synthesized using conventional chemical reagents. We also discuss perspective uses of RH-NSs on the basis of the current research progress.

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Section: Nanostructures From Rhsmentioning

confidence: 99%

Section: Properties Of Rh‐nssmentioning

confidence: 99%

Versatile Nanostructures from Rice Husk Biomass for Energy Applications

et al. 2018

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“…Die hergestellten Kohlenstoff‐SiO 2 ‐Nanokomposite können als Vorstufe für hochwertige keramische Materialien wie Siliciumcarbid und Siliciumnitrid dienen . Darüber hinaus haben auch Kohlenstoff‐SiO 2 ‐Nanokomposite, die durch Carbonisierung an der Luft bei einer bestimmten Temperatur hergestellt wurden, Aufmerksamkeit erregt . Dies liegt daran, dass der nichtfunktionalisierte Kohlenstoff (oder freie Kohlenstoff) im Produkt an der Luft entfernt werden kann und somit die durch die chemische Kombination von Kohlenstoff und SiO 2 erzeugten Funktionalitäten hervorgehoben werden können …”

Section: Nanostrukturen Aus Reishüllenunclassified

“…Die PL der RH‐Nanostrukturen ist abhängig von den Synthesebedingungen und empfindlich gegenüber der Umgebung. Beispielsweise ist die PL von SiO 2 ‐Nanokompositen mit chemisch eingebautem Kohlenstoff weitgehend von der Reaktionstemperatur abhängig (mit 600 °C als optimaler Temperatur), da eine höhere Reaktionstemperatur die chemischen Bindungen zwischen Kohlenstoff und SiO 2 zerstören würde, während eine niedrigere Temperatur eine große Menge an freiem Kohlenstoff in den Nanokompositen erzeugt, sodass die PL durch Absorption des einfallenden Lichts stark abgeschwächt würde. Für die RH‐GQDs ist die PL stark abhängig vom Oxidationsgrad und der Synthesetemperatur sowie vom pH‐Wert und der Temperatur der Umgebung .…”

Section: Eigenschaften Von Reishülsen‐nanostrukturenunclassified

Vielfältige Nanostrukturen aus Reishülsen‐Biomasse für Energieanwendungen

Wang

Smith

Wang³

et al. 2018

Angewandte Chemie

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Die Umwandlung von Biomasse in hochwertige Produkte hat in jüngster Zeit beträchtliche Aufmerksamkeit erhalten. Biomasse aus Reishülsen (“rice husks”, RH) wurde ursprünglich dazu verwendet, Schüttgüter für konventionelle Anwendungen herzustellen, während in den letzten Jahren daraus eine Vielzahl von modernen Nanostrukturen (NS) hergestellt wurden. RH‐basierte Nanostrukturen (RH‐NS) sind kostengünstig und umweltfreundlich, und sie haben viele Eigenschaften, die für Anwendungen in verschiedenen Bereichen vielversprechend sind. Basierend auf der einzigartigen Struktur und den Komponenten der RH wurde eine Reihe von neuartigen, auf Kohlenstoff/Silicium basierenden NS mit herausragenden Eigenschaften erschlossen, die mit herkömmlichen chemischen Reagenzien nur schwer zu synthetisieren sind. Hier werden neueste Forschungsergebnisse zu RH‐NS zusammengefasst, die sich auf Design, Herstellung, Eigenschaften und Anwendungen im modernen Energiebereich beziehen.

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“…14 It was reported that carbon-incorporated silica (CIS), which exhibited photoluminescence (PL) when excited by an ultraviolet (UV) light, can be obtained from RHs by lowering the thermal treatment temperature. 15 This is significant for practical biomedical applications, since both carbon and silica are biocompatible. Although the CIS with PL performance was synthesized from RHs, the reported method by lowering the thermal treatment temperature would create a problem of free carbon formation, which would greatly quench the PL.…”

Section: Introductionmentioning

confidence: 99%

Design and Fabrication of Highly Photoluminescent Carbon-Incorporated Silica from Rice Husk Biomass

Wang

Zeng

Joshi

et al. 2019

Ind. Eng. Chem. Res.

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In this work, we designed a two-step method to prepare carbon-incorporated silica from rice husk biomass. This two-step method could promote the chemical bonding between carbon and silica that is responsible for the generation of photoluminescence and effectively remove free carbon in the final product that is responsible for the quenching of photoluminescence. Such a structural optimization of the carbon-incorporated silica derived from rice husks led to a significant improvement in its photoluminescence with the emission band covering the entire visible spectrum. The toxicity of the carbon-incorporated silica from rice husks was 2-fold lower compared to commercial crystalline and amorphous spherical silica. Therefore, such rice husk-derived carbon-incorporated silica by the two-step method is promising for widespread application.

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White Photoluminescence from Carbon-Incorporated Silica Fabricated from Rice Husk

Cited by 6 publications

References 13 publications

Versatile Nanostructures from Rice Husk Biomass for Energy Applications

Versatile Nanostructures from Rice Husk Biomass for Energy Applications

Vielfältige Nanostrukturen aus Reishülsen‐Biomasse für Energieanwendungen

Design and Fabrication of Highly Photoluminescent Carbon-Incorporated Silica from Rice Husk Biomass

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