How to Make a Photocatalytic Air Purifier

Stefan Hollos and J. Richard Hollos

Format and pricing: Paperback 5.5 x 8.5 inch (49 pages) $9.95, pdf $6.95
ISBN: 9798852420602 (paperback)
Publication date: July 2023

We write books, so we spend a lot of time indoors. When we go outside the air seems so much fresher than inside. Is there anyway to recreate that fresh air feeling indoors? That's a question we've been trying to answer for a few years now. We think we've found an answer. It's called photocatalytic air purification. What exactly this means is described in the next section. The final section of this guide describes in detail how to actually make an air purifier that uses photocatalysis to remove volatile organic chemicals (VOCs) from the air.

The photocatalytic air purifier which we've created and describe here has made a positive difference to us. We set it on a table next to where we work and run it whenever we're working. When it's running, the air seems fresh, similar to having a nearby open window. It's not magic but it has reduced the incidence of itchy watery eyes, irritated throat, runny nose and general feeling of malaise that VOCs can produce.

If you want information on buying a kit, send an email to the address listed at the bottom of this page.

About the creators of this guide

Stefan Hollos and J. Richard Hollos are physicists and electrical engineers by training, and enjoy anything related to math, physics, engineering and computing. They are brothers and business partners at Exstrom Laboratories LLC in Longmont, Colorado.

Table of Contents

• Preface
• What is Photocatalytic Air Purification?
• How to Make a Photocatalytic Air Purifier
• Creating the photocatalytic surface
• Mounting the fan and filter
• Setting up the light source
• Coupling light to the photocatalysis chamber
• The fan power supply
• Parts list
• Bibliography