Photocatalytic generation of gas phase reactive oxygen species from adsorbed water: Remote action and electrochemical detection

The improvement of indoor environments is great importance as it can significantly improve human health, comfort and productivity. Herein, different forms TiO 2 nanorods were used the photocatalyst for generation reactive oxygen species (ROS) in a gas phase photoreactor under controlled humidity. Several parameters investigated by monitoring remote decolourisation Methylene Blue (MB) embedded Nafion film. A 26% 80% relative humidity was observed when MB film 0.5 cm away from photocatalyst. length ratio light/dark intervals have major impacts on efficiency photocatalytic process, which we link to amount water adsorbed photocatalyst, source hydroxyl radicals. Furthermore, production ROS quantified through polyaniline electrochemical sensor rate 1 · 10 12 molecules s ?1 estimated. This study contributes efficacy method air decontamination, development efficient cleaning devices. • Gas layers. Remote solid methylene blue varying role reactant discussed. Photogeneration estimated in-situ an sensor.