Iron Pyrite/Titanium Dioxide Photoanode for Extended Near Infrared Light Harvesting in a Photoelectrochemical Cell

Di Yan Wang; Cheng Hung Li; Shao Sian Li; Tsung Rong Kuo; Chin Ming Tsai; Tin Reui Chen; Ying Chiao Wang; Chun Wei Chen; Chia Chun Chen

doi:10.1038/srep20397

Iron Pyrite/Titanium Dioxide Photoanode for Extended Near Infrared Light Harvesting in a Photoelectrochemical Cell

Di Yan Wang, Cheng Hung Li, Shao Sian Li, Tsung Rong Kuo, Chin Ming Tsai, Tin Reui Chen, Ying Chiao Wang, Chun Wei Chen, Chia Chun Chen^*

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

The design of active and stable semiconducting composites with enhanced photoresponse from visible light to near infrared (NIR) is a key to improve solar energy harvesting for photolysis of water in photoelectrochemical cell. In this study, we prepared earth abundant semiconducting composites consisting of iron pyrite and Titanium oxide as a photoanode (FeS 2/TiO 2 photoanode) for photoelectrochemical applications. The detailed structure and atomic compositions of FeS 2/TiO 2 photoanode was characterized by high-resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDS), powder X-ray diffraction (XRD), inductively coupled plasma with atomic emission spectroscopy (ICPAES) and Raman spectroscopy. Through the proper sulfurization treatment, the FeS 2/TiO 2 photoanode exhibited high photoresponse from visible light extended to near infrared range (900 nm) as well as stable durability test for 4 hours. We found that the critical factors to enhance the photoresponse are on the elimination of surface defect of FeS 2 and on the enhancement of interface charge transfer between FeS 2 and TiO 2. Our overall results open a route for the design of sulfur-based binary compounds for photoelectrochemical applications.

Original language	English
Article number	20397
Journal	Scientific reports
Volume	6
DOIs	https://doi.org/10.1038/srep20397
Publication status	Published - 2016 Feb 8

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@article{30a77350a3194945a4185a5d62acf8d9,

title = "Iron Pyrite/Titanium Dioxide Photoanode for Extended Near Infrared Light Harvesting in a Photoelectrochemical Cell",

abstract = "The design of active and stable semiconducting composites with enhanced photoresponse from visible light to near infrared (NIR) is a key to improve solar energy harvesting for photolysis of water in photoelectrochemical cell. In this study, we prepared earth abundant semiconducting composites consisting of iron pyrite and Titanium oxide as a photoanode (FeS 2/TiO 2 photoanode) for photoelectrochemical applications. The detailed structure and atomic compositions of FeS 2/TiO 2 photoanode was characterized by high-resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDS), powder X-ray diffraction (XRD), inductively coupled plasma with atomic emission spectroscopy (ICPAES) and Raman spectroscopy. Through the proper sulfurization treatment, the FeS 2/TiO 2 photoanode exhibited high photoresponse from visible light extended to near infrared range (900 nm) as well as stable durability test for 4 hours. We found that the critical factors to enhance the photoresponse are on the elimination of surface defect of FeS 2 and on the enhancement of interface charge transfer between FeS 2 and TiO 2. Our overall results open a route for the design of sulfur-based binary compounds for photoelectrochemical applications.",

author = "Wang, {Di Yan} and Li, {Cheng Hung} and Li, {Shao Sian} and Kuo, {Tsung Rong} and Tsai, {Chin Ming} and Chen, {Tin Reui} and Wang, {Ying Chiao} and Chen, {Chun Wei} and Chen, {Chia Chun}",

note = "Funding Information: We thank the support from the National Science Council, Taiwan (Contract numbers NSC-100-2113-M-003-001-MY3).",

year = "2016",

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doi = "10.1038/srep20397",

language = "English",

volume = "6",

journal = "Scientific Reports",

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AU - Wang, Di Yan

AU - Li, Cheng Hung

AU - Li, Shao Sian

AU - Kuo, Tsung Rong

AU - Tsai, Chin Ming

AU - Chen, Tin Reui

AU - Wang, Ying Chiao

AU - Chen, Chun Wei

AU - Chen, Chia Chun

N1 - Funding Information: We thank the support from the National Science Council, Taiwan (Contract numbers NSC-100-2113-M-003-001-MY3).

PY - 2016/2/8

Y1 - 2016/2/8

N2 - The design of active and stable semiconducting composites with enhanced photoresponse from visible light to near infrared (NIR) is a key to improve solar energy harvesting for photolysis of water in photoelectrochemical cell. In this study, we prepared earth abundant semiconducting composites consisting of iron pyrite and Titanium oxide as a photoanode (FeS 2/TiO 2 photoanode) for photoelectrochemical applications. The detailed structure and atomic compositions of FeS 2/TiO 2 photoanode was characterized by high-resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDS), powder X-ray diffraction (XRD), inductively coupled plasma with atomic emission spectroscopy (ICPAES) and Raman spectroscopy. Through the proper sulfurization treatment, the FeS 2/TiO 2 photoanode exhibited high photoresponse from visible light extended to near infrared range (900 nm) as well as stable durability test for 4 hours. We found that the critical factors to enhance the photoresponse are on the elimination of surface defect of FeS 2 and on the enhancement of interface charge transfer between FeS 2 and TiO 2. Our overall results open a route for the design of sulfur-based binary compounds for photoelectrochemical applications.

AB - The design of active and stable semiconducting composites with enhanced photoresponse from visible light to near infrared (NIR) is a key to improve solar energy harvesting for photolysis of water in photoelectrochemical cell. In this study, we prepared earth abundant semiconducting composites consisting of iron pyrite and Titanium oxide as a photoanode (FeS 2/TiO 2 photoanode) for photoelectrochemical applications. The detailed structure and atomic compositions of FeS 2/TiO 2 photoanode was characterized by high-resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDS), powder X-ray diffraction (XRD), inductively coupled plasma with atomic emission spectroscopy (ICPAES) and Raman spectroscopy. Through the proper sulfurization treatment, the FeS 2/TiO 2 photoanode exhibited high photoresponse from visible light extended to near infrared range (900 nm) as well as stable durability test for 4 hours. We found that the critical factors to enhance the photoresponse are on the elimination of surface defect of FeS 2 and on the enhancement of interface charge transfer between FeS 2 and TiO 2. Our overall results open a route for the design of sulfur-based binary compounds for photoelectrochemical applications.

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Iron Pyrite/Titanium Dioxide Photoanode for Extended Near Infrared Light Harvesting in a Photoelectrochemical Cell

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