A transparent Pyrex μ-reactor for combined in situ optical characterization and photocatalytic reactivity measurements
- CINF, Department of Physics, Building 312, Fysikvej, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby (Denmark)
- Department of Micro- and Nanotechnology, Nanotech, Building 345 East, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby (Denmark)
A new Pyrex-based μ-reactor for photocatalytic and optical characterization experiments is presented. The reactor chamber and gas channels are microfabricated in a thin poly-silicon coated Pyrex chip that is sealed with a Pyrex lid by anodic bonding. The device is transparent to light in the UV-vis-near infrared range of wavelengths (photon energies between ∼0.4 and ∼4.1 eV). The absorbance of a photocatalytic film obtained with a light transmission measurement during a photocatalytic reaction is presented as a proof of concept of a photocatalytic reactivity measurement combined with in situ optical characterization. Diffuse reflectance measurements of highly scattering photocatalytic nanopowders in a sealed Pyrex μ-reactor are also possible using an integrating sphere as shown in this work. These experiments prove that a photocatalyst can be characterized with optical techniques after a photocatalytic reaction without removing the material from the reactor. The catalyst deposited in the cylindrical reactor chamber can be illuminated from both top and bottom sides and an example of application of top and bottom illumination is presented.
- OSTI ID:
- 22220393
- Journal Information:
- Review of Scientific Instruments, Vol. 84, Issue 10; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BONDING
CATALYSTS
CYLINDRICAL CONFIGURATION
DEPOSITS
EQUIPMENT
EV RANGE
INFRARED SPECTRA
LIGHT TRANSMISSION
NANOSTRUCTURES
PHOTOCATALYSIS
PHOTOLYSIS
PHOTONS
PYREX
REACTIVITY
SILICON
VISIBLE RADIATION