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Producción en serie de titania negra mediante pirólisis


Oferta Tecnológica
Un instituto tecnológico suizo ofrece un nuevo método de síntesis de titania negra. La titania negra tiene una destacada fotoactividad bajo radiación visible que puede explotarse en la utilización de energía solar. El nuevo método de síntesis permite la producción en serie de titania negra. Gracias a la adaptación de la fase, es posible optimizar la fotoactividad del compuesto. Se buscan socios con el fin de establecer acuerdos de licencia y cooperación técnica.


Mass production of black titania by flame spray pyrolysis for improved solar energy conversion
A Swiss institute of technology offers a novel method for the synthesis of black titania. Black titania has a remarkable photo-activity under visible-light irradiation which can be exploited in solar energy utilization. It consists of TiO2 and crystalline TiOx (x>2). The new synthesis method allows for mass production of black titania. By tailoring the phase the photo-activity of the compound can be tuned and optimized. Possible cooperation types: License- and/or technical cooperation agreement.
Till today, the formation of such TiOx (titanium oxides) required extreme processing conditions such as high pressure, H2 (hydrogen) (or CO (carbon monoxide)) reduction at high temperatures and laser or UV (ultraviolet light) irradiation for several hours/days. Therefore, such techniques provided limited control of the desirable TiOx phase characteristics and were not amenable to mass production of such materials.

Control of process -Y- scalable to mass production:
Flame spray pyrolysis produces in a one-step reaction crystalline TiOx (e.g. Ti4O7 and Ti3O5) on silver nanoclusters (nano-silver) and nanostructured, mostly anatase (one of the three mineral forms of titanium dioxide), TiO2 particles.
Flammable titanium and silver precursor solutions are dispersed by O2 in fine mists and combusted continuously. During the process Ag (argentum/silver) nanoclusters (nanosilver) deposit onto newly-formed nanostructured TiO2 due to the difference in their melting and boiling points (Fig. 1).

Fig. 1: Production of nanostructured TiOx/Ag/TiO2 by flame spray synthesis

Strong metal-support interactions between TiO2 and Ag in the flame result in crystalline TiOx as proven by XRD (X-ray powder diffraction). The growth of TiOx can be controlled through the flame spray synthesis conditions and Ag loading allowing the tuning of the visible-light absorption as observed in the powder color (Fig. 2).

Fig. 2: Tuning of the bandgap of the nanostructured titanium powders

Half-lives of methylene blue (a standard material in photocatalysis) slurries containing our TiOx/Ag/TiO2 are significantly reduced under visible light conditions compared to the industry standard named P25 TiO2. Under solar light, which contains UV radiation, P25 is activated, but still underperforms compared to "black TiO2" (Fig. 3).

Fig. 3: Photocatalytic degradation of methylene blue (MB) under solar light

The fields of application for black titania comprise:
- solar energy conversion and storage,
- the photocatalytic elimination of pollutants and
- anti-bacterial treatments.

The advantages of the material, method and scalability have been demonstrated by the Swiss institute of technology.
The next step - feasibility study - in a cooperation is to analyse together the possibilities and opportunities of the offered technology for the application of the partner.
The second step would be testing of the technology in prototypes - or functional models - of the application of the partner. For both steps - and after - technical cooperation and/or license agreement are envisaged.

Type of partner sought:
Industry/SME active in solar energy conversion and storage, photocatalytic elimination of pollutants, antibacterial agents and/or else.
Advantages and Innovations:
- Scalable to mass production:
Flame spray pyrolysis produces in a one-step reaction black titania. It is a gas-phase reaction, which is scalable to mass production (kg/h)
- Exceptional visible light photoactivity:
Black titania from flame spray pyrolysis has a novel material architecture with exceptional visible-light photoactivity.
- Optimal tuning the bandgap:
The described synthesis method allows for a close control of material characteristics meaning tuning the bandgap and thus being able to tune the wavelength sensitivity.
Stage of Development:
Under development/lab tested
Patent(s) applied for but not yet granted
CommeR Statunts Regarding IPR Status:
WO Patent

Partner sought

Type and Role of Partner Sought:
The specific area of activity of the partner:
Industry/SME active in:
- Solar energy conversion and storage
- Photocatalytic elimination of pollutants
- Antibacterial agents
- ...

The tasks to be performed by the partner sought:
Tasks related to technical cooperation and technology Licensing are:
1. Feasibility:
First step is to analyse together the possibilities and opportunities of the offered technology for the application of the partner.
2. Prototyping and testing:
Second step would be testing of the technology in prototypes - or functional models - of the application of the partner.
Other steps to be defined.


Type and Size of Client:
Already Engaged in Trans-National Cooperation:
Languages Spoken:


Technology Keywords:
04007 Eficiencia energética
04005005 Energía térmica / solar
02007006 Fine Chemicals, Dyes and Inks
04008003 Micro y nanotecnología relacionada con la energía
05001003 Química inorgánica