Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 238, Issue -, Pages 136-146Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2018.07.018
Keywords
Design of experiments; TiO2 sol-gel parameters; CO2 photoreduction; Machine vision; Photocatalysis
Funding
- Engineering and Physical Sciences Research Council [EP/K021796/1]
- Research Centre for Carbon Solutions (RCCS)
- James Watt Scholarship Programme at Heriot-Watt University
- Buchan Chair in Sustainable Energy Engineering
- EPSRC [EP/K021796/1] Funding Source: UKRI
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An optimized sol-gel method for TiO2 coating was developed for CO2 photoreduction using a systematic Design of Experiments (DOE) approach and an efficient Plackett-Burman (PB) design. Conducting fifteen experiments, the effects of seven sol-gel process parameters were investigated on four catalytic properties for CO2 photo reduction: band gap, catalyst coverage, anatase crystallinity and ratio anatase:rutile. The PB design results yielded a wide range for the catalyst's properties: band gap (1.86-3.35 eV), coverage (11.53-99.63%), anatase crystallinity (0-48.5 nm) and ratio anatase:rutile (1:0 and 0:1). Machine vision using manual global, Otsu global and adaptive thresholding were compared for estimating the coverage of catalyst on a glass slide support.
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