A coating that clears the air on its own.
A 20-nanometre anatase TiO₂ film breaks VOCs down into CO₂ and water under ordinary indoor light. Nothing to replace, nothing left to throw away.
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Indoor VOCs build up where people gather
Air pollution causes seven million premature deaths a year. Urban VOC readings sit near 500 ppb and climb past 1,000 ppb in an occupied lecture hall. HEPA catches particles, not gases, and it does so at the cost of a filter to replace and energy to keep running.
Deaths per year from air pollution
WHO estimate
Urban VOC baseline
Peak VOC in lecture halls
PM2.5, two to three times the WHO limit
From photon to harmless molecule
One surface runs the whole chain, absorb light, generate radicals, oxidize the pollutant, at 20 nanometres, continuously, under whatever light is already in the room.
A photon hits the lattice and knocks an electron loose.
That electron-hole pair reacts with moisture in the air to form radicals.
The radicals tear the VOC apart down to carbon dioxide and water.
TiO₂ + hν → e⁻ + h⁺ → •OH + O₂⁻ → (VOC) → CO₂ + H₂O
What makes the surface work
Anatase TiO₂ coating
Anatase · 5% doped · 3.2 eV bandgap
A doped anatase lattice absorbs ambient photons above 3.2 eV, freeing an electron and leaving a reactive hole behind. That pair starts every reaction downstream.
VOC oxidation
0.1 µmol/m²/s · 500 ppb → CO₂ + H₂O
Hydroxyl radicals break volatile organics apart at 0.1 µmol/m²/s, down to carbon dioxide and water, rather than trapping them for someone to dispose of later.
NOx abatement
0.08 µmol/m²/s · 90% at 400 lux
The same surface handles nitrogen oxides at 0.08 µmol/m²/s and 90% efficiency under 400 lux, the light level of an ordinary corridor rather than a lab bench.
Sol-gel matrix
Sol-gel · 95% uniformity/m² · 20 nm · 50 m²/g
Sol-gel deposition lays down a 20 nm film at 95% uniformity per square metre, with 50 m²/g of active area, 40% more reactive surface than the commercial TiO₂ it replaces.
Activate the coating and watch the air clear
A live-style air monitor on simulated 1 Hz telemetry. Flip the coating on and the VOC trend bends down, crossing back under the 400 ppb ventilation threshold the real sensors alert on.
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What Sabzpoost removes
VOC removed
500 to 300 ppb · 100 m² · 4 hr
NOx removed
40 to 26 µg/m³
Less energy than HEPA
0.8 kWh/m²/day saved
CO₂-eq cut
per 1,000 m² per year
Rated lifespan
5% degradation over life
Filters or waste
Zero secondary waste
Durability: 10,000 hr UV exposure · 5% degradation over a 10-year rated life · 10 sensors/m² at 1 Hz, alerting at 400 ppb.
Best deployed here
- 01Lecture halls and libraries where VOCs build over a full day of occupancy
- 02Hospital and lab corridors that already run lighting around the clock
- 03Retrofits where the energy draw and filter waste of HEPA are the real blocker
Questions researchers ask
01What pollutants does Sabzpoost remove?
Volatile organic compounds and nitrogen oxides. The coating degrades 90% of VOCs at the surface and removes NOx at 0.08 µmol/m²/s with 90% efficiency. In a room-scale test it brought VOC from 500 to 300 ppb over four hours across 100 m². It does not capture particulate matter; TiO₂ acts on gases.
02Does the coating need UV light to work?
No. The doped anatase TiO₂ film activates under ordinary indoor light at around 400 lux, the level of a normally lit corridor, so it runs on the lighting a building already has.
03What maintenance does it require?
None in normal use. There are no filters to change and no moving parts. The film is rated for ten years with about 5% degradation over that life, verified across 10,000 hours of UV exposure testing.
04What does the pollution turn into?
Carbon dioxide and water, in trace amounts. Hydroxyl radicals generated at the surface break VOC molecules down completely instead of trapping them, so there is no saturated filter or secondary waste stream to dispose of.
Send us a surface and a light level
Tell us the room: its lux, its VOC baseline, its square metres, and we will estimate the degradation curve Sabzpoost delivers there.