A powerful nano-photocatalyst which can perform even under an LED light, has been developed by MCL's research team. The composite structure consists of a metallic core and TiO2 shell is proved to be an excellent photocatalyst both indoor and outdoor applications. This new photo-catalyst can be used in the applications of pet deodorization, formaldehyde absorbent/decomposer, toilet deodorization, and others such as self-cleaning and germproof under certain circumstances. In the graph, we can see it's effective in whole visible light spectrum from 400 to 800nm.

Figure 1: composite shell nano-structure

Success cases with our photocatalyst for different purposes were applied in a couple of construction projects, which are Congressional leader office, Hsin-chu SS construction project, Kaoshiung green building project, a pet accessory manufacturing building, CPC building in Taipei and Chunwha Telecom headquarter in Taipei. Accelerated aging test have been performed for the anti-acidic, anti-basic and salt fog tests, which abide by the standard codes of CNS10757-K6801 and ASTM B117. The testing results shown in the following graphs, suggest that our photo-catalyst is suitable for a new furnished building by quickly reducing the formaldehyde content in the air.

Figure 2: Formaldehyde decomposition test results

The traditional photo-catalyst can work only under sunshine or a UV lighting condition as illustrated in the graph below. MCL's patented concept creates a new horizon of photo-catalyst with metal-anatase composite nano-particle, which is even effective in cloudy day and under visible light. This also expands its potential as an anti-germ spray.
Comparing to other commercial photo-catalyst products, the major features of our high performance photo-catalyst are summarized as follows:
ˇ´ Multifunctional
„ϡCAntimicrobial
„ϡCEliminate formaldehyde, NOx, deodorize indoor air
„ϡCEasy Cleaning
ˇ´ Activated by both UV and visible lights, ideal for indoor applications
ˇ´ Antimicrobial function active even in darkness, providing 24 hours protection
ˇ´ Ease of application ˇV Spray applied from aqueous solution, substrate temperature up to
   4000C
ˇ´ Superior film forming property with excellent clarity and adhesion to substrate
ˇ´ Long service life, >3 years for room temperature applied film (>3H hardness). Permanently
   bonded to ceramic substrates when applied at higher temperature.

Contact information

MCL Technology Showcase
Chun-Sien Lin, PhD, Senior Researcher
Materials and Chemical Research Labs, ITRI
Tel: 886-3-5913597 Fax:886-3-5835087
Email: mcl_tech@itri.org.tw
Address : Rm. 205-2, Bldg. 77, 195, Sec. 4, Chung Hsing Rd.,
                Chutung, Hsinchu, Taiwan 31015