Volatile organic compounds in indoor environment and photocatalytic oxidation: State of the art

A Review of Some Representative Techniques for Controlling the Indoor Volatile Organic Compounds

“…PCO process harnesses radiant energy from natural (or artificial) light sources with heterogeneous catalyst to degrade the organic pollutants into their mineral components (Li et al, 2005a;Ao et al, 2004;Hoffmann, 1995). Titanium dioxide (TiO 2 ) is the most widely used catalyst for the photocatalytic reaction (Wang et al, 2007). Other semiconductors (such as ZnO, ZnS, CdS, Fe 2 O 3 , and SnO 2 ) are also commonly used catalysts (Wang et al, 2007).…”

“…Titanium dioxide (TiO 2 ) is the most widely used catalyst for the photocatalytic reaction (Wang et al, 2007). Other semiconductors (such as ZnO, ZnS, CdS, Fe 2 O 3 , and SnO 2 ) are also commonly used catalysts (Wang et al, 2007). The PCO process creates hydroxyl radicals and super-oxide ions, which are highly reactive electrons (Pichat et al, 2000).…”

“…This breaks the pollutants down into harmless components (carbon dioxide and water molecules), making the air more purified (Hodgson et al, 2007). Wang et al (2007) supplied VOCs contaminated air over a titanium dioxide (TiO 2 ) catalyst at room temperature, while illuminating with a black lamp. These authors found that over 95% of the VOCs were converted to carbon dioxide and water.…”

Titanium Dioxide/Zeolite Catalytic Adsorbent for the Removal of NO and Acetone Vapors

“…1 Indoor air pollutants are emitted from various sources such as combustion processes, cooking stoves, office equipment, construction materials, consumer products, etc. 1,2 Various kinds of air pollutants may be presented in the indoor air because of different sources of indoor air pollution, but nitrogen oxides (NO x ) and volatile organic compounds (VOCs) have always been two of the most common air pollutants.…”

Enhancement of Corrosion Protection of UV Curable Coatings in the Presence of Aliphatic and Aromatic Amine Compounds

“…Organic coatings are employed in order to protect the steel structures against corrosion (Gonzlez-Garc et al, 2007). Volatile organic compounds (VOCs) in polymeric coatings cause health hazards and toxicity problems (Wang et al, 2007). To overcome such problems many acts and regulations have been imposed on paints and coatings industries (Bandres et al, 2011 andPirvu et al, 2010) ensuring the use of eco-friendly materials, like vegetable oil based polymeric coatings (Boruah et al, 2012), waterborne polymer coatings (Zafar et al, 2008) and UV curable coatings (Xu et al, 2012).…”