Name: visible-light induced reduction of graphene oxide using plasmonic nanoparticle
Uploaded: 2015-09-22T16:00:00
Description: Watch this Scientific Journal Video about Visible-light Induced Reduction of Graphene Oxide Using Plasmonic Nanoparticle at JoVE.com

Dette arbeidet ble støttet av National Research Foundation of Korea (2013R1A1A1061387) og KU-Kist forskningsfond.

1. Fremstilling av utgangsforbindelse <ol><li> Utarbeidelse av graphene oksid (GO): <ol><li> GO forberedelse på modifisert Hummer metode 14 <ol><li> Legg 3,0 g av grafittflak i en blanding av konsentrert H-SO 2 4 / H 3 PO 4 (360: 40 ml) ved romtemperatur. (Merk: Spesielle hensyn må tas når du bruker sterke syrer H 2 SO 4 og H 3 PO 4.) </li><li> Legg KMnO 4 (18,0 g) langsomt under omrøring og avkjøling i et isbad for å holde t...

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Synlig lys bestråling på GO løsning for 30 min med gullnanopartikler (AuNPs, AuNSs &amp; AuNRs) viste de raske farge skifter fra lys gul-brun til svart farge (figur 1). For å oppnå meget rent r-GO produkt i høyt utbytte, er det to viktige faktorer som må følge. Det ene er å bruke AuNPs som en effektiv plasmonic katalysator, ettersom AuNPs kan sterkt absorberer det synlige lyset blant andre strukturer (dvs. AuNRs, AuNSs). Et annet er bruk av nano GO løsning for å få nanopartikkel-fre...

<html> Den første utviklet scotch-tape basert metode 1 og kjemisk damp deponering to var gode metoder for å produsere den uberørte tilstanden til en graphene, men stor skala graphene syntese eller graphene beleggdannelse på overflaten med stort område har vært ansett som en viktig begrensning av tidligere metoder. 3. En av mulige løsninger for storskala r-GO-syntese vil bli våt-kjemisk syntesemetode som først krever reaksjonene med sterke oksidasjonsmidler, omfattende fysisk behandling så som sonikering for å produsere GO ark, og endelig reduksjon av oksygen funksjonaliteter slike som hydroksy, epoksyd og karbonylgrupper i GO er nødvendig for å gjenopprette de opprinnelige fysikalske egenskaper. For det meste 4, ble reduksjonen av GO utført med enten kjemisk metode ved bruk av hydrazin eller dets derivater 5 eller ved termisk behandling metode (550-1,100 ° C) i en inert eller reduserende atmosfære. 6 jove_content &quot;&gt; Disse prosessene krever giftige kjemikalier, lang reaksjonstid og høy temperatur som økte det totale energibehovet for r-GO syntese. 7 Mens foto bestråle reduksjon prosesser som UV-indusert, 8 bilder termiske prosessen med en pulset xenon flash, 9 pulset laser assistert 10 og foto-termisk oppvarming med kamera blitsen lyser 11 har også blitt rapportert for utarbeidelse av r-GO. Generelt er lav konverteringseffektiviteten av foto-indusert metoder overført til bruk av UV eller pulset laser bestråling som kan levere høy foton energi. Den lave fotonenergi av synlig lys begrenser bruken og ikke tiltrukket mye for r-GO syntese. Gode lys absorpsjon egenskaper Plasmonic nanopartikler i de synlige og / eller NIR regioner kan forbedre dagens ulemper av bruken av synlig lys i r-GO-syntese. 12,13 Milde reaksjonsbetingelser, kort reaksjonstid og begrenset bruk av giftige chemicals kunne gjøre det synlige lyset indusert plasmon assistert fotokatalytisk reduksjon av GO som et nyttig alternativ metode. I foreliggende fremgangsmåte, beskriver vi effektive og enkle r-GO syntesemetode med Plasmonic nanopartikler og synlig lys. Reaksjonen fremgang ble funnet å være sterkt avhengig av strukturer av Plasmonic nanopartikler som sfæriske gull nanopartikler (AuNPs), gull nanorods (AuNRs) og gull nanostars (AuNSs). Bruken av AuNPs viste den mest effektive reduksjon av GO og nanopartikler er lett avtagbart og kan resirkuleres for gjentatt bruk (figur 1). R-go syntetisert ved hjelp av synlig lys og AuNPs viste nesten lik kvalitet sammenlignet med r-GO utarbeidet av velkjent kjemisk metode (hydrazin) som demonstrert ved bruk av ulike analytiske målinger og fluorescensslukkingen / recovery basert DNA påvisningsmetoden.

<table border="0" cellpadding="0" cellspacing="0">
	<tbody>
		<tr>
			<td>Cy3 modifeid ssDNA</td>
			<td>IDT(Iowa, USA)</td>
			<td></td>
			<td>HPLC purified by IDT</td>
		</tr>
		<tr>
			<td>Gold nanoparticles (30 nm)</td>
			<td>Ted Pella, Inc(Redding, CA, USA).</td>
			<td>15706-20</td>
			<td>colloidal solution</td>
		</tr>
		<tr>
			<td>4-(2-hydroxyethyl)-1-piperazineethane sulfonic acid (HEPES) (99.5%)</td>
			<td>Sigma-Aldrich (St. Louis, MO, USA)</td>
			<td>7365-45-9</td>
			<td></td>
		</tr>
		<tr>
			<td>Gold(III)Chloride Hydrate (99.999%)</td>
			<td>Sigma-Aldrich (St. Louis, MO, USA)</td>
			<td>&#160;27988-77-8</td>
			<td>strongly hygroscopic</td>
		</tr>
		<tr>
			<td>Sodium Borohydride (99.99%)</td>
			<td>Sigma-Aldrich (St. Louis, MO, USA)</td>
			<td>16940-66-2</td>
			<td></td>
		</tr>
		<tr>
			<td>Hexadecyltrimethylammonium bromide (&#8805;99%)</td>
			<td>Sigma-Aldrich (St. Louis, MO, USA)</td>
			<td>57-09-0</td>
			<td></td>
		</tr>
		<tr>
			<td>L-Ascorbic Acid(&#8805;99.0%)</td>
			<td>Sigma-Aldrich (St. Louis, MO, USA)</td>
			<td>50-81-7</td>
			<td></td>
		</tr>
		<tr>
			<td>Sodium Chloride (99.5%)</td>
			<td>Sigma-Aldrich (St. Louis, MO, USA)</td>
			<td>7647-14-5</td>
			<td></td>
		</tr>
		<tr>
			<td>Silver Nitrate&#160; (&#8805;99.0%)</td>
			<td>Sigma-Aldrich (St. Louis, MO, USA)</td>
			<td>7761-88-8</td>
			<td></td>
		</tr>
		<tr>
			<td>Graphite</td>
			<td>Sigma-Aldrich (St. Louis, MO, USA)</td>
			<td>7782-42-5</td>
			<td></td>
		</tr>
		<tr>
			<td>Sulfuric acid</td>
			<td>Sigma-Aldrich (St. Louis, MO, USA)</td>
			<td>7664-93-9</td>
			<td></td>
		</tr>
		<tr>
			<td>Phophoric acid</td>
			<td>Sigma-Aldrich (St. Louis, MO, USA)</td>
			<td>7664-38-2</td>
			<td></td>
		</tr>
		<tr>
			<td>Potassium permanganate</td>
			<td>Sigma-Aldrich (St. Louis, MO, USA)</td>
			<td>7722-64-7</td>
			<td></td>
		</tr>
		<tr>
			<td>Hydrogen peroxide</td>
			<td>JUNSEI</td>
			<td>23150-0350</td>
			<td></td>
		</tr>
		<tr>
			<td>Ammonium hydroxide</td>
			<td>Sigma-Aldrich (St. Louis, MO, USA)</td>
			<td>1336-21-6</td>
			<td></td>
		</tr>
		<tr>
			<td>Xe-lamp</td>
			<td>&#160;Cermax, Waltham, USA</td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>NIR Laser</td>
			<td>Class-IV, Sanctity Laser, Shanghai, China&#160;</td>
			<td></td>
			<td>6W (output power)</td>
		</tr>
		<tr>
			<td>UV-Vis spectrophotometer&#160;</td>
			<td>S-3100, SINCO, South Korea</td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>Transmission Electron Microscopy</td>
			<td>H-7650, Hitachi, Japan</td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>Spectro Fluorometer</td>
			<td>Jasco FP-6500, Tokyo, Japan</td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>X-ray Photoelectron Spectrometer</td>
			<td>AXIS&#8211;NOVA, KRATOS Inc., UK</td>
			<td></td>
			<td></td>
		</tr>
	</tbody>
</table>

visible-light induced reduction of graphene oxide using plasmonic nanoparticle

Nåværende arbeid demonstrerer enkel, kjemisk fri, rask og energieffektiv måte å produsere redusert graphene oksid (r-GO) løsning ved romtemperatur ved hjelp av synlig lys bestråling med Plasmonic nanopartikler. Den nanopartikkel plasmonic brukes til å forbedre reduksjonseffektiviteten av GO. Det tar bare 30 minutter ved romtemperatur ved å belyse de løsninger med Xe-lampe, kan r-GO-løsninger oppnås ved å fjerne gull nanopartikler ved enkel sentrifugeringstrinn. De sfæriske gull nanopartikler (AuNPs) sammenlignet med de andre nanostrukturer er den mest passende plasmonic nanostrukturen for r-GO forberedelse. Den reduserte graphene oksyd fremstilt ved anvendelse av synlig lys og AuNPs var like kvalitative så kjemisk redusert graphene oksyd, som ble støttet ved forskjellige analytiske teknikker slik som UV-vis spektroskopi, Raman-spektroskopi, pulver røntgendiffraksjon og XPS. Den reduserte graphene oksid forberedt med synlig lys viser gode slukkeegenskaper over fluorescent molekyler endret ssDNA og utmerket fluorescensgjenvinning for target DNA deteksjon. R-go utarbeidet av resirkulerte AuNPs er funnet å være av samme kvalitet med at kjemisk redusert r-GO. Bruken av synlig lys med plasmonic nanopartikkel viser godt alternativ metode for r-GO-syntese.

Figur 1 viser den generelle ordningen for synlig lys og plasmonic nanopartikkelbasert r-GO reduksjon reaksjon. Figur 2 viser instrumental oppsettet for reaksjonene. Etter reaksjonen er det nødvendig at sentrifugeringstrinn for å fjerne den brukte fotokatalysatoren (AuNSs, AuNRs eller AuNPs) som vist i figur 3A. Den HRTEM analyse viser fullstendig fjerning av nanopartikler i supernatanten (R-GO) (figur 3B), som også er mulig å bekrefte med UV-synlig-...

Watch this Scientific Journal Video about Visible-light Induced Reduction of Graphene Oxide Using Plasmonic Nanoparticle at JoVE.com

Visible-light Induced Reduction of Graphene Oxide Using Plasmonic Nanoparticle

En enkel protokoll for fremstilling av reduserte graphene oksyd ved hjelp av synlig lys, og plasmonic nanopartikler er beskrevet.

Synlig lys indusert reduksjon i Graphene Oxide Bruke Plasmonic Nanopartikkel

Present work demonstrates the simple, chemical free, fast, and energy efficient method to produce reduced graphene oxide (r-GO) solution at RT using ...

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Preparation of ZnO Nanorod/Graphene/ZnO Nanorod Epitaxial Double Heterostructure for Piezoelectrical Nanogenerator by Using Preheating Hydrothermal

Utarbeidelse av ZnO Nanorod / Graphene / ZnO Nanorod Epitaxial Double hetrostruktur for piezo-elektrisk Nanogenerator ved hjelp Forvarming Hydrothermal

Well-aligned ZnO nanostructures have been intensively studied over the last decade for remarkable physical properties and enormous applications. Here, we ...

Advanced Compositional Analysis of Nanoparticle-polymer Composites Using Direct Fluorescence Imaging

Avansert Sammensetningsanalyse av Nanopartikkel-polymer Composites bruker direkte Fluorescens Imaging

The fabrication of polymer-nanoparticle composites is extremely important in the development of many functional materials. Identifying the precise ...

Testing of Nanoparticle Release from a Composite Containing Nanomaterial Using a Chamber System

Testing av Nanopartikkel Løslatelse fra Composite Inneholder nanomaterial Ved hjelp av en Chamber System

With the rapid development of nanotechnology as one of the most important technologies in the 21st century, interest in the safety of consumer products ...