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Development of solid solution materi...

Lee, Kyureon.

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Development of solid solution materials for solar energy conversion.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Development of solid solution materials for solar energy conversion./
作者:	Lee, Kyureon.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2015,
面頁冊數:	142 p.
附註:	Source: Dissertation Abstracts International, Volume: 77-01(E), Section: B.
Contained By:	Dissertation Abstracts International77-01B(E).
標題:	Physical chemistry. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3721842
ISBN:	9781339036205

Development of solid solution materials for solar energy conversion.
Lee, Kyureon.

Development of solid solution materials for solar energy conversion. - Ann Arbor : ProQuest Dissertations & Theses, 2015 - 142 p.

Source: Dissertation Abstracts International, Volume: 77-01(E), Section: B.

Thesis (Ph.D.)--University of Colorado at Boulder, 2015.

Of the many efforts to develop new sustainable and renewable energy resources, hydrogen production from solar driven water splitting has been intensely explored. For this application, it is essential to find and develop semiconductor materials that are able to generate visible light-induced charge carriers at energies suitable for water splitting, which is the ultimate goal of the projects in this dissertation.

ISBN: 9781339036205Subjects--Topical Terms:

1981412
Physical chemistry.

Development of solid solution materials for solar energy conversion.
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245 1 0 $a Development of solid solution materials for solar energy conversion.
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500 $a Source: Dissertation Abstracts International, Volume: 77-01(E), Section: B.
500 $a Adviser: Gordana Dukovic.
502 $a Thesis (Ph.D.)--University of Colorado at Boulder, 2015.
520 $a Of the many efforts to develop new sustainable and renewable energy resources, hydrogen production from solar driven water splitting has been intensely explored. For this application, it is essential to find and develop semiconductor materials that are able to generate visible light-induced charge carriers at energies suitable for water splitting, which is the ultimate goal of the projects in this dissertation.
520 $a A bulk scale (Ga1-xZnx)(N1-xOx ), solid solution of GaN and ZnO, is a promising photocatalyst for overall water splitting under visible illumination. Even though it exhibits composition-dependent visible absorption, the value of x (ZnO content) that can be obtained for the bulk (Ga1-xZnx)(N1-xOx) is limited in the conventional synthetic route. Thus, it was desirable to develop a new synthetic route for (Ga1-xZnx)(N1-xOx) with a wide range of x values in order to investigate the potential of (Ga 1-xZnx)(N1-xOx) in solar energy absorption. In addition, nanoscale semiconductors generally show better photocatalytic properties than their bulk counterparts in many aspects. The work described in Chapter 2 and 3 details the synthesis, reaction mechanism, and structural and optical characterizations of (Ga1-xZnx)(N 1-xOx) nanocrystals with a wide range of compositions. We examined how the band gap depends on composition and observed a minimum of 2.25 eV at x= 0.87. Finally, we find that (Ga1-xZnx)(N 1-xOx) nanocrystals exhibit photoelectrochemical water oxidation activity that is higher than that of bulk (Ga1-xZnx)(N 1-xOx) with the same composition.
520 $a Cobalt mixed-metal spinel oxides, Co(Al1-xGax) 2O4, have been predicted to exhibit favorable properties as photocatalysts for solar energy conversion. Chapter 4 focuses on the synthesis and structural and optical characterizations of Co(Al1-xGa x)2O4 with a range of 0 ≤ x ≤ 1. UV-vis absorbance data revealed that the absorption onset energies decreased monotonically with increasing x. Finally, the photocatalytic activities were evaluated via photodegradation of methyl orange. Remarkably, low energy (<2.5 eV) ligand-field transitions contributed between 46--72% of the photoactivity of Co(Al0.5Ga0.5)2O 4.
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