novel photocatalytic coatings for air purification applications

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novel photocatalytic coatings for air purification applications
NOVEL PHOTOCATALYTIC
COATINGS
FOR AIR PURIFICATION
APPLICATIONS*
Yolanda de Miguel
Nanotechnology Cluster Leader
TECNALIA (Spain)
HORIZON 2020
EUROPEAN UNION FUNDING
FOR RESEARCH & INNOVATION
NANOTECHNOLOGY AT TECNALIA
TECNALIA considers
NANOTECHNOLOGY as a
key enabling technology
for innovation in all
industrial sectors, e.g.
Construction,
Manufacturing,
Aerospace, Automotive,
Health and Energy and
Environment-related
industries.
OUR NANOTECHNOLOGY R&D ACTIVITIES
Novel nanomaterials (Fig. 1)
Nano-based products (Fig. 2)
EHS: Health, safety &
environmental impacts of
nanotechnology (Fig. 3)
Multi-scale modeling tools for
predicting material properties
(Fig. 4)
PHOTOCATALYTIC
PRODUCT
DEVELOPMENT
AT TECNALIA
HORIZON 2020
EUROPEAN UNION FUNDING
FOR RESEARCH & INNOVATION
MOTIVATION
Novel photocatalytic air-purification and self-cleaning coatings on the
facades of buildings or on the surfaces of other construction materials
in urban areas.
Novel air-purifying and self-cleaning buildings
This will not only keep those surfaces clean but also reduce the concentrations of
harmful pollutants in the city air, such as NOx and other air-borne contaminants
(e.g. volatile organic compounds, VOCs).
The anti-bacterial properties of photocatalytic coatings are also attractive as a means
to mitigate the problem of persistent bacteria, which are present in hospitals.
PHOTOCATALYTIC PRODUCT PROPERTIES
TECNALIA has focused on several technologies for the development of
formulations as well as methods for the application of the formulation
onto a variety of substrates (e.g. from mortars to different steel and glass
surfaces).
In all cases, photocatalytic products with either self-cleaning, anti-bacterial
and/or air-purification properties were achieved.
Development of novel photocatalytic
raw materials and derived products for
both indoor and outdoor applications
Photocatalysis: Contaminant degradation
Creation of e--h+ pairs in TiO2 under UV light
Formation of reactive species that degrade organic molecules,
bacteria, algae, mould, etc.
TiO2 + hv
O2 + e-
O2
-
+ H2O
HO2 + e-
HO2 + H2O
e- + h +
O2
HO2 + OH
-
HO2
H2O 2 + OH
http://www.t-2biz/charts/t-2_chart_photcatalysm.gif
OH
-
+ h+
-
OH
-
Super-hydrophilic nature
Water contact angle measure
(ISO_DIS_27448-1)
http://srs.dl.ac.ulc/arch/posters/Peterka_poster-TiO2-2005.pdf
Self-Cleaning Coatings: Super-hydrophilic
Anti-fogging coatings
Super-hydrophilic nature
Kaneko M., Okura I., "Photocatalysis" (2002)
Fujishima A., Hashimoto K., Watanabe T., "TiO2 Photocatalysis" (1999)
PHOTOCATALYTIC PRODUCT PROPERTIES
SUPER-HYDROPHILICITY was determined by water contact angle measurements.
While in terms of the ANTI-BACTERIAL properties, E. Coli tests were carried out.
For outdoor applications, NOx testing was performed, and for indooor applications, other
tests (such as acetaldehyde VOC test) were employed to assess the extent of
photocatalytic activity in terms of AIR PURIFICATION.
MARKET NEEDS IN PHOTOCATALYTIC MATERIALS
There is a current need for cost-effective solutions which can be easily
up-scaled, commercialized and used, e.g. in the construction sector.
For this reason, TECNALIA has been working for many years in the
development of knowledge in the field of nanotechnology which can be applied
to solving this problem.
In particular, TECNALIA has undertaken R&D in the development of novel pc coatings for a variety of substrates (i.e. many of the different types of
materials used in the construction sector) and in some cases TECNALIA has
even undertaken the development of new tailor-made raw materials
required to obtain the desired final properties of the product.
Finally, and most importantly, it must be noted that both the formulations
and the application processes are designed and developed for each
specific industrial application.
TECNALIA´S PATENTS
HYBRID PHOTOCATALYTIC COATINGS, METHOD FOR APPLYING SAID
COATINGS TO DIFFERENT SUBSTRATES AND USES OF THE
SUBSTRATES THUS COATED. Patent number: WO2012/069672 A1
METHOD FOR OBTAINING PHOTOCATALYTIC COATINGS ON METAL
SUBSTRATES. Patent number: WO2010/122182 A1
CURRENT RESEARCH
ON PHOTOCATALYTIC
COATINGS FOR AIR
PURIFICATION
HORIZON 2020
EUROPEAN UNION FUNDING
FOR RESEARCH & INNOVATION
Eco-innovative, Safe and Energy
Efficient wall panels and materials for
a healthier indoor environment
http://www.eco-see.eu/
14
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ECO-SEE PHOTOCATALYTIC PRODUCTS
ECO-SEE OBJECTIVE
To develop innovative solutions aimed at improving
INDOOR air quality, based on the development of
photocatalytic coatings tailored for application onto
specific indoor surfaces of the pre-fabricated panels
and with durable activity in the visible light range.
ECO-SEE PHOTOCATALYTIC PRODUCTS DEVELOPMENT
KEY PARTNERS
TECNALIA (SPAIN)
UNIVERSITY OF AVEIRO (PORTUGAL)
UNIVERSITY OF BATH (U.K.)
FRAUNHOFER (GERMANY)
ACCIONA (SPAIN)
NOVEL PHOTOCATALYSTS
Synthesis of Ag/RE-TiO2
1 mol% Ag doped TiO2 sol (1M)
Evaporation of Ti-i-pr/H2O/IPA/acid
on a rotary evaporator
at 60 °C and 110 mPa
18
Photon Correlation Spectrometry (PCS)
of size distribution of sol particles
NOVEL PHOTOCATALYSTS
Ag-TiO2: Photocatalytic activity
•
•
•
•
•
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NOx abatement
White LED lamp
0.2 ppm as NOx initial concentration
Great reproducibility/stability
1mol% Ag-TiO2 > 2mol% > P25
Doped photocatalytic nanoparticles
References
1.
DM Tobaldi, RAS Ferreira, RC Pullar, MP Seabra, LD Carlos, JA Labrincha, under submission in J Mat Chem
2.
DM Tobaldi, RC Pullar, AF Gualtieri, MP Seabra, JA Labrincha, under submission in Cat Sci Technol
3.
DM Tobaldi, N Rozman, RC Pullar, M Leoni, MP Seabra, A Sever Škapin, JA Labrincha. In preparation
4.
DM Tobaldi, RC Pullar, AF Gualtieri, A Belen Jorge, R Binions, PF McMillan, MP Seabra, JA Labricha. Accepted for publication in
Cryst Eng Comm
5.
C Piccirillo, RA Pinto, DM Tobaldi, RC Pullar, JA Labrincha, MME Pintado, PML Castro. J Photochem Photobiol B, 296 (2015) 40-47,
doi:10.1016/j.jphotochem.2014.09.012
6.
M Karmaoui, SG Leonardi, DM Tobaldi, N Donato, RC Pullar, MP Seabra, JA Labrincha, G Neri. J Mater Chem B, 3, (2015) 399-407
doi: 10.1039/C4TB01177E
7.
M Karmaoui, DM Tobaldi, A Sever Škapin, RC Pullar, MP Seabra, JA Labrincha, VS Amaral. RSC Advances, 4, (2014), 46762-46770,
doi: 10.1039/C4RA07214F
8.
R Zamiri, H Abbastabar Ahangar, DM Tobaldi, A Rebelo, MP Seabra, M Shabani, JMF Ferreira. Physical Chemistry Chemical Physics,
16, (2014), 22418-22425 doi: 10.1039/C4CP02945C
9.
R Zamiri, DM Tobaldi, H Abbastabar Ahangar, A Rebelo, MP Seabra, M Scott Belsley, JMF Ferreira. RSC Advances, 4, (2014) 3538335389, doi: 10.1039/C4RA05325G
10.
C Piccirillo, C Rocha, DM Tobaldi, RC Pullar, JA Labrincha, MO Ferreira, PML Castro, MME Pintado. J Mater Chem B, 2 (2014) 5999–
6009, doi:10.1039/C4TB00984C
11.
DM Tobaldi, RC Pullar, R Binions, A Belen Jorge, PF McMillan, M Saeli, MP Seabra, JA Labrincha. Cat Sci Technol, 4 (2014) 2134–
2146, doi:10.1039/C4CY00423J
12.
L Senff, DM Tobaldi, P Lemes-Rachadel, JA Labrincha, D Hotza. Construct Build Mater, 65 (2014) 191–200,
doi:10.1016/j.conbuildmat.2014.04.121
13.
DM Tobaldi, RC Pullar, MP Seabra, JA Labrincha. Mat Lett, 122 (2014) 345–347, doi:10.1016/j.matlet.2014.02.055
14.
DM Tobaldi, C Piccirillo, RC Pullar, AF Gualtieri, MP Seabra, PML Castro, JA Labrincha. J Phys Chem C, 118 (2014) 4751–4766,
doi:10.1021/jp411997k
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DEVELOPMENT OF P-C COATINGS FOR LIME MORTAR PANELS
Photocatalytic lime mortar coatings
• Development of novel lime photocatalytic coatings, which have been applied
onto lime panel substrates via a manual application method.
DEVELOPMENT OF P-C COATINGS FOR LIME MORTAR PANELS
Photocatalytic lime mortar coatings
• For this, doped photocatalytic nanoparticles were dispersed and homogeneously
incorporated in the selected lime rendering mortar: Tradical Decor, BCB.
-
Several dosages have been studied: 2%, 3% and 5% w/w.
- As agreed with the end-user (BCB), the render thickness
of all these coatings was 3 mm.
PHOTOCATALYTIC ACTIVITY (PCA) TESTING
• Several of the ECO-SEE prototypes are currently being evaluated for
photocatalytic activity in the visible light range. In particular, tests are for
indoor air pollutant abatement, i.e. VOCs and also for micro-organisms (antifungal PCA tests).
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THANK YOU
FOR
YOUR ATTENTION
[email protected]
HORIZON 2020
EUROPEAN UNION FUNDING
FOR RESEARCH & INNOVATION

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