Photocatalytic oxidation of nitrite by sunlight using TiO2 supported on hollow glass microbeads

✍ Scribed by Chen Shifu; Cao Gengyu

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 54 KB
• Volume: 73
• Category: Article
• ISSN: 0038-092X
• DOI: 10.1016/s0038-092x(02)00033-6

✦ Synopsis

The feasibility of photocatalytic oxidation of nitrite using TiO supported on hollow glass 2 24 3 microbeads as a photocatalyst by sunlight was studied. The results showed that 1.1 3 10 mol / dm of nitrite can be completely photocatalytically oxidized after 120-min illumination by sunlight. The conversion of nitrite 31 21 was increased rapidly by adding a small amount of H O , Fe and Pd . The effects of parameters such as 2 2 22 2 2 the amount of TiO / beads, air flow, initial pH, dichromate, SO , NO , Cl and organic compounds on the 2 4 3

photocatalytic oxidation of nitrite were also studied. The possible mechanisms of photocatalytic oxidation of nitrite were investigated. After 150-h illumination by sunlight, there was no significant loss of the photocatalytic activity of TiO / beads.