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Photocatalytic Hydrogen Evolution Ac...

Zheng, Yan.

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Photocatalytic Hydrogen Evolution Activity of Modified Semiconductor Photocatalysts Prepared by Different Methods.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Photocatalytic Hydrogen Evolution Activity of Modified Semiconductor Photocatalysts Prepared by Different Methods./
作者:	Zheng, Yan.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	97 p.
附註:	Source: Masters Abstracts International, Volume: 80-02.
Contained By:	Masters Abstracts International80-02.
標題:	Chemistry. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10817287
ISBN:	9780438275492

Photocatalytic Hydrogen Evolution Activity of Modified Semiconductor Photocatalysts Prepared by Different Methods.
Zheng, Yan.

Photocatalytic Hydrogen Evolution Activity of Modified Semiconductor Photocatalysts Prepared by Different Methods. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 97 p.

Source: Masters Abstracts International, Volume: 80-02.

Thesis (M.S.)--State University of New York at Stony Brook, 2018.

This item must not be sold to any third party vendors.

Semiconductor photocatalysts have gradually attracted people's attention in recent years. Semiconductor photocatalysts are stable in nature and also because of its environmentally friendly features, it becomes a very good choice for photocatalysts using in water splitting to produce hydrogen. However, at the same time, most of semiconductor photocatalysts have a sever drawback, the application of light is limited to the ultraviolet region, the usage of visible light is still unsatisfied. And the photo-generated charge separation efficiency of the semiconductor material after being excited by light is very low, so there are not enough electrons accumulated on the surface of the material to participate in the photocatalytic hydrogen production reaction. The drawbacks mentioned above leading to a low hydrogen production activity. Therefore, modifications to improve the ability of semiconductor photocatalysts to use visible light are needed. In this thesis, photocatalytic activities for water splitting of different photocatalysts under visible light irradiation were investigated. WO 3/TiO2 photocatalysts with different loading concentration of WO3 were synthesized by traditional wet impregnation method. In addition, besides the traditional wet impregnation method, a novel synthesis method called doping segregation method was used to prepare Rh doped SrTiO 3. Rh doped SrTiO3 photocatalysts with different Rh doping concentrations were prepared by doping segregation method. Photocatalytic activity for water splitting and hydrogen production of both WO3/TiO 2 and Rh doped SrTiO3 were tested using self-designed water splitting system. Produced hydrogen amount was detected by gas chromatography.

ISBN: 9780438275492Subjects--Topical Terms:

516420
Chemistry.

Photocatalytic Hydrogen Evolution Activity of Modified Semiconductor Photocatalysts Prepared by Different Methods.
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520 $a Semiconductor photocatalysts have gradually attracted people's attention in recent years. Semiconductor photocatalysts are stable in nature and also because of its environmentally friendly features, it becomes a very good choice for photocatalysts using in water splitting to produce hydrogen. However, at the same time, most of semiconductor photocatalysts have a sever drawback, the application of light is limited to the ultraviolet region, the usage of visible light is still unsatisfied. And the photo-generated charge separation efficiency of the semiconductor material after being excited by light is very low, so there are not enough electrons accumulated on the surface of the material to participate in the photocatalytic hydrogen production reaction. The drawbacks mentioned above leading to a low hydrogen production activity. Therefore, modifications to improve the ability of semiconductor photocatalysts to use visible light are needed. In this thesis, photocatalytic activities for water splitting of different photocatalysts under visible light irradiation were investigated. WO 3/TiO2 photocatalysts with different loading concentration of WO3 were synthesized by traditional wet impregnation method. In addition, besides the traditional wet impregnation method, a novel synthesis method called doping segregation method was used to prepare Rh doped SrTiO 3. Rh doped SrTiO3 photocatalysts with different Rh doping concentrations were prepared by doping segregation method. Photocatalytic activity for water splitting and hydrogen production of both WO3/TiO 2 and Rh doped SrTiO3 were tested using self-designed water splitting system. Produced hydrogen amount was detected by gas chromatography.
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