Most photocatalysts in use today are titania or variants thereof, and are activated primarily by ultraviolet (UV) light.  Some manufacturers and academics claim absorption of visible light, but the absorption is typically very weak.  Also, it is not enough to just absorb the light if the light does not contribute to the photocatalytic activity.

We test our photocatalysts functionally.  How quickly are methylene blue or rhodamine B dyes cleared? And are the dye molecules just bleached or actually dissociated? How quickly is phenol degraded, and are there intermediates formed that may be just as undesirable? These are the measurements that matter.  Email us for details of Total Organic Carbon (TOC) Analysis by independent testing lab VHG Labs (Manchester, NH).

The image at right shows Nanoptek’s Visible Light Titania™  photocatalyst (dark grey, upper left corner), Enhanced Sunblock™ ultraviolet and visible light absorber (yellow, upper right corner) compared to normal titania (white, lower right corner), and a visible light photocatalyst from another manufacturer (light beige, lower left corner).  The light absorption spectra of all but the beige sample can be seen here, but the deep yellow and grey colors of, respectively, our absorber and photocatalyst alone powerfully demonstrate how much visible light they absorb.

Nanoptek Visible Light Titania™ works greater than 20X faster to clear dyes than the industry-leading
titania photocatalyst and continues to work even in the absence of UV,
for new uses indoors and more effective use outside.

And Nanoptek Enhanced Absorber™ will improve protection from
high energy blue light in a host of applications.