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Project Title2010-036 Method to Prepare IR-activated Photocatalyst Systems and its Applications
Track Code2010-036
Websitehttp://otc.rutgers.edu/
Short Description

Researchers at Rutgers University have developed a new concept and approach that will enable photocatalytic systems more efficiency by utilizing infrared (IR) radiation for photoexcitation. The Rutgers invention accomplishes IR activation through the integration of up-converting Rare Earth doped phosphors with a semiconductor photocatalyst like TiO2. This innovative invention enables enhancements to the performance of photocatalytic and solar technologies by reducing light transfer limitations such as scattering and absorption losses. The up-converting Rare earth doped phosphors will convert the low energy IR radiation to the needed effective high energy UV radiation and therefore localize the UV light in the vicinity of the photocatalyst, enhancing performance. For solar applications, the system utilizes solar energy more efficiently exploiting the IR radiation which is 7-10 times more available than ambient UV.

Abstract

Photocatalysis offer a variety of applications such as: a non-energy intensive approach for chemical waste remediation, self-cleaning applications, sterile coatings and processing, water purification, air purification, energy generation and photocatalytic cancer treatment. The current photocatalyst technologies rely on UV radiation to activate the photocatalyst, which has its limitations, besides being a hazardous form of radiation. Current limitations preventing widespread industrial use of UV activated photocatalytic systems are the low photocatalytic efficeiency and scale-up problems. Thus, these systems have to use high power Mercury or Xenon light sources due to the inherent light transfer limitations to UV radiation.

Researchers at Rutgers University have developed a new concept and approach that will enable photocatalytic systems more efficiency by utilizing infrared (IR) radiation for photoexcitation. The Rutgers invention accomplishes IR activation through the integration of up-converting Rare Earth doped phosphors with a semiconductor photocatalyst like TiO2. This innovative invention enables enhancements to the performance of photocatalytic and solar technologies by reducing light transfer limitations such as scattering and absorption losses. The up-converting Rare earth doped phosphors will convert the low energy IR radiation to the needed effective high energy UV radiation and therefore localize the UV light in the vicinity of the photocatalyst, enhancing performance. For solar applications, the system utilizes solar energy more efficiently exploiting the IR radiation which is 7-10 times more available than ambient UV. Another benefit of the IR activated Rare Earth doped system is the deeper penetration of the IR wavelengths into biological tissue of approximately 267 times as the wavelength increases from UV to Near IR.

 
Tags. Chemical Waste Remediation . Applying to surfaces will impart self-cleaning properties to coated object . Application to ship hulls to prevent or reduce fouling . Can be used to
 
Posted DateJul 23, 2012 4:52 PM

Researcher

Name
Richard Riman

Manager

Name
Rick Smith

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