Extraordinary Enhancement of UV Absorption in TiO2 Nanoparticles Enabled by Low-Oxidized Graphene Nanodots

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dc.contributor.authorYoon, Hyewonko
dc.contributor.authorKim, Daehanko
dc.contributor.authorPark, Minsuko
dc.contributor.authorKim, Jinko
dc.contributor.authorKim, Jungmoko
dc.contributor.authorSrituravanich, Werayutko
dc.contributor.authorShin, Byunghako
dc.contributor.authorJung, Yeonwoongko
dc.contributor.authorJeon, Seokwooko
dc.date.accessioned2018-07-24T02:21:36Z-
dc.date.available2018-07-24T02:21:36Z-
dc.date.created2018-07-04-
dc.date.created2018-07-04-
dc.date.created2018-07-04-
dc.date.issued2018-06-
dc.identifier.citationJOURNAL OF PHYSICAL CHEMISTRY C, v.122, no.22, pp.12114 - 12121-
dc.identifier.issn1932-7447-
dc.identifier.urihttp://hdl.handle.net/10203/244002-
dc.description.abstractTitanium oxide (TiO2) exhibits intrinsically strong absorption of ultraviolet (UV) light, which has been utilized in a variety of applications, such as environmental purification/sterilization, health care, and energies. Accordingly, it is greatly demanded to precisely tune and further improve the UV absorption of TiO2 to significantly broaden its versatility. Herein, we report an extraordinary enhancement of UV absorption in TiO2 nanoparticles (NPs) incorporated with graphene nanodots (GNDs) of low oxygen concentration. Chemically bonded TiO2 NP/GND composites exhibit highly tunable UV absorption, achieving over 243% enhancement of molar extinction coefficient at 336 nm. We found that the drastic improvement is a result of the direct charge transfer from the lowest unoccupied molecular orbitals of GNDs to the conduction bands of TiO2, enabled by wide/direct band gaps in GNDs with a small amount of oxygen. Also, the significantly improved power conversion efficiency (PCE similar to 16.74%) and UV stability of the TiO2 NP/GND composites reveal their high promise for applications benefiting from TiO2 NP/GND composites, such as solar cells and photolysis.-
dc.languageEnglish-
dc.publisherAMER CHEMICAL SOC-
dc.titleExtraordinary Enhancement of UV Absorption in TiO2 Nanoparticles Enabled by Low-Oxidized Graphene Nanodots-
dc.typeArticle-
dc.identifier.wosid000435020300058-
dc.identifier.scopusid2-s2.0-85047384330-
dc.type.rimsART-
dc.citation.volume122-
dc.citation.issue22-
dc.citation.beginningpage12114-
dc.citation.endingpage12121-
dc.citation.publicationnameJOURNAL OF PHYSICAL CHEMISTRY C-
dc.identifier.doi10.1021/acs.jpcc.8b03329-
dc.contributor.localauthorShin, Byungha-
dc.contributor.localauthorJeon, Seokwoo-
dc.contributor.nonIdAuthorSrituravanich, Werayut-
dc.contributor.nonIdAuthorJung, Yeonwoong-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordPlusPEROVSKITE SOLAR-CELLS-
dc.subject.keywordPlusCHARGE-TRANSFER LMCT-
dc.subject.keywordPlusQUANTUM DOTS-
dc.subject.keywordPlusINTERFACE MODIFICATION-
dc.subject.keywordPlusLIGHT STABILITY-
dc.subject.keywordPlusCARBON-
dc.subject.keywordPlusPHOTOLUMINESCENCE-
dc.subject.keywordPlusDEGRADATION-
dc.subject.keywordPlusTITANIA-
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