Graphite oxide with different oxygen contents as photocatalysts for hydrogen and oxygen evolution from water

Te Fu Yeh, Hsisheng Teng

研究成果: Conference contribution

6 引文 (Scopus)

摘要

Graphite oxide (GO) photocatalysts were derived from graphite oxidation. Absorption spectroscopy shows the increasing band gap of GO with the oxygen content. Electrochemical analysis along with the Mott-Schottky equation show that the conduction and valence band edge levels of GO from appropriate oxidation are suitable for both the reduction and oxidation of water. The photocatalytic activity of GO specimens with various oxygen contents was measured in methanol and AgNO3 solutions for H2 and O 2 evolution, respectively. The H2 evolution was strong and stable over time whereas the O2 evolution was negligibly small due to mutual photocatalytic reduction of the GO with upward shift of the valence band edge under illumination. The conduction band edge of GO showed negligibly change with the oxygen content. When NaIO3 was used as a sacrificial reagent to suppress the mutual reduction mechanism under illumination, strong O2 evolution was observed over the GO specimens. The present study demonstrates that chemical modification can easily modify the electronic properties of GO for specific photosynthetic applications.

原文English
主出版物標題Carbon Nanotubes and Nanostructures
主出版物子標題From Fundamental Properties and Processes to Applications and Devices
頁面7-26
頁數20
版本40
DOIs
出版狀態Published - 2012 十二月 1
事件Carbon Nanotubes and Nanostructures: From Fundamental Properties and Processes to Applications and Devices - 220th ECS Meeting - Boston, MA, United States
持續時間: 2011 十月 92011 十月 14

出版系列

名字ECS Transactions
號碼40
41
ISSN(列印)1938-5862
ISSN(電子)1938-6737

Other

OtherCarbon Nanotubes and Nanostructures: From Fundamental Properties and Processes to Applications and Devices - 220th ECS Meeting
國家United States
城市Boston, MA
期間11-10-0911-10-14

指紋

Photocatalysts
Graphite
Hydrogen
Oxides
Oxygen
Water
Valence bands
Conduction bands
Oxidation
Lighting
Chemical modification
Absorption spectroscopy
Electronic properties
Energy gap
Methanol
Thermodynamic properties

All Science Journal Classification (ASJC) codes

  • Engineering(all)

引用此文

Yeh, T. F., & Teng, H. (2012). Graphite oxide with different oxygen contents as photocatalysts for hydrogen and oxygen evolution from water. 於 Carbon Nanotubes and Nanostructures: From Fundamental Properties and Processes to Applications and Devices (40 編輯, 頁 7-26). (ECS Transactions; 卷 41, 編號 40). https://doi.org/10.1149/1.3703509
Yeh, Te Fu ; Teng, Hsisheng. / Graphite oxide with different oxygen contents as photocatalysts for hydrogen and oxygen evolution from water. Carbon Nanotubes and Nanostructures: From Fundamental Properties and Processes to Applications and Devices. 40. 編輯 2012. 頁 7-26 (ECS Transactions; 40).
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Yeh, TF & Teng, H 2012, Graphite oxide with different oxygen contents as photocatalysts for hydrogen and oxygen evolution from water. 於 Carbon Nanotubes and Nanostructures: From Fundamental Properties and Processes to Applications and Devices. 40 edn, ECS Transactions, 編號 40, 卷 41, 頁 7-26, Carbon Nanotubes and Nanostructures: From Fundamental Properties and Processes to Applications and Devices - 220th ECS Meeting, Boston, MA, United States, 11-10-09. https://doi.org/10.1149/1.3703509

Graphite oxide with different oxygen contents as photocatalysts for hydrogen and oxygen evolution from water. / Yeh, Te Fu; Teng, Hsisheng.

Carbon Nanotubes and Nanostructures: From Fundamental Properties and Processes to Applications and Devices. 40. 編輯 2012. p. 7-26 (ECS Transactions; 卷 41, 編號 40).

研究成果: Conference contribution

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Yeh TF, Teng H. Graphite oxide with different oxygen contents as photocatalysts for hydrogen and oxygen evolution from water. 於 Carbon Nanotubes and Nanostructures: From Fundamental Properties and Processes to Applications and Devices. 40 編輯 2012. p. 7-26. (ECS Transactions; 40). https://doi.org/10.1149/1.3703509