The growing concerns on environmental damage and health impact from volatile organic compound (VOC) have initiated Thai researchers to look at ways to treating air pollutant such as benzene, toluene, ethylbenzene and xylene (BTEX) under visible light. 

“We decided against using titanium dioxide (TiO2) photocatalyst in our study despite the fact that TiO2 is considered good chemical stability, relatively low price, and no toxicity. Instead we opted for silver doped titanium dioxide (Ag/TiO2) photocatalyst which is more efficient in visible-light region” said Dr. Chamorn Chawengkijwanich, a research team member from NANOTEC. “The idea to use powdered photocatalyst thin film on plastic is because there is very limited study on this development”. 

The research study shows Ag/TiO2 exhibited the best performance for gaseous BTEX degradation under visible light. The maximum degradation efficiency was xylene (89%), ethylbenzene (86%), toluene (83%), and benzene (79%). 

The researchers reported their work in a paper published by Materials Science Forum. 

Collaborators on this research included King Mongkut’s University of Technology Thonburi, Center for Energy Technology and Environment (Ministry of Education), and National Nanotechnology Center (NANOTEC).