Abstract

Photocatalysis is an evolving field that has a potential to become a cost effective water cleaning method. One of the most studied photocatalysts is Titanium Dioxide (TiO2). It has a high activity in response to UV wavelengths but almost no activity in the visible region of the spectrum. The activity changes rapidly between roughly 340 and 370 nm although this can be modified by doping. This region of the spectrum corresponds to the current lower limit of high efficiency LEDs. This presents a challenge in the use of UV LEDs for commercially viable photocatalysis and makes accurate comparisons of experimental data between different research groups essential. This paper presents a photocatalytic test reactor that provides a calibrated light source and pre-defined test conditions to remove as many sources of uncertainty as possible to improve data comparability. The test reactor provides a selectable intensity of up to 1.9 kW/m2 at the photocatalyst surface. The comparability of the results is achieved through the use of pre-calibration and control electronics that minimizes the biggest source of uncertainty – intensity variation between individual LEDs. The system devised reduces the intensity variation between systems by a factor of 11.6.

Conference

ConferenceASEAN-EU STI Days
CountryViet Nam
CityHanoi
Period10/05/1612/05/16

Fingerprint

Light emitting diodes
Light sources
Photocatalysis
Photocatalysts
Titanium dioxide
Cleaning
Electronic equipment
Doping (additives)
Calibration
Wavelength
Costs
Water
Uncertainty

Keywords

  • Chemical reactors
  • FPGA
  • LED
  • Materials testing
  • Photocatalysis

Cite this

Sergejevs, A., Clarke, C., Allsopp, D., Marugan, J., & Bowen, C. (2016). A calibrated UV LED light source for photocatalytic experimentation. Paper presented at ASEAN-EU STI Days, Hanoi, Viet Nam.

A calibrated UV LED light source for photocatalytic experimentation. / Sergejevs, Aleksandrs; Clarke, Christopher; Allsopp, Duncan; Marugan, Javier; Bowen, Christopher.

2016. Paper presented at ASEAN-EU STI Days, Hanoi, Viet Nam.

Research output: Contribution to conferencePaper

Sergejevs, A, Clarke, C, Allsopp, D, Marugan, J & Bowen, C 2016, 'A calibrated UV LED light source for photocatalytic experimentation' Paper presented at ASEAN-EU STI Days, Hanoi, Viet Nam, 10/05/16 - 12/05/16, .
Sergejevs A, Clarke C, Allsopp D, Marugan J, Bowen C. A calibrated UV LED light source for photocatalytic experimentation. 2016. Paper presented at ASEAN-EU STI Days, Hanoi, Viet Nam.
Sergejevs, Aleksandrs ; Clarke, Christopher ; Allsopp, Duncan ; Marugan, Javier ; Bowen, Christopher. / A calibrated UV LED light source for photocatalytic experimentation. Paper presented at ASEAN-EU STI Days, Hanoi, Viet Nam.
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AU - Clarke,Christopher

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AU - Bowen,Christopher

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N2 - Photocatalysis is an evolving field that has a potential to become a cost effective water cleaning method. One of the most studied photocatalysts is Titanium Dioxide (TiO2). It has a high activity in response to UV wavelengths but almost no activity in the visible region of the spectrum. The activity changes rapidly between roughly 340 and 370 nm although this can be modified by doping. This region of the spectrum corresponds to the current lower limit of high efficiency LEDs. This presents a challenge in the use of UV LEDs for commercially viable photocatalysis and makes accurate comparisons of experimental data between different research groups essential. This paper presents a photocatalytic test reactor that provides a calibrated light source and pre-defined test conditions to remove as many sources of uncertainty as possible to improve data comparability. The test reactor provides a selectable intensity of up to 1.9 kW/m2 at the photocatalyst surface. The comparability of the results is achieved through the use of pre-calibration and control electronics that minimizes the biggest source of uncertainty – intensity variation between individual LEDs. The system devised reduces the intensity variation between systems by a factor of 11.6.

AB - Photocatalysis is an evolving field that has a potential to become a cost effective water cleaning method. One of the most studied photocatalysts is Titanium Dioxide (TiO2). It has a high activity in response to UV wavelengths but almost no activity in the visible region of the spectrum. The activity changes rapidly between roughly 340 and 370 nm although this can be modified by doping. This region of the spectrum corresponds to the current lower limit of high efficiency LEDs. This presents a challenge in the use of UV LEDs for commercially viable photocatalysis and makes accurate comparisons of experimental data between different research groups essential. This paper presents a photocatalytic test reactor that provides a calibrated light source and pre-defined test conditions to remove as many sources of uncertainty as possible to improve data comparability. The test reactor provides a selectable intensity of up to 1.9 kW/m2 at the photocatalyst surface. The comparability of the results is achieved through the use of pre-calibration and control electronics that minimizes the biggest source of uncertainty – intensity variation between individual LEDs. The system devised reduces the intensity variation between systems by a factor of 11.6.

KW - Chemical reactors

KW - FPGA

KW - LED

KW - Materials testing

KW - Photocatalysis

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