Effects of Inorganic Anions on TiO₂ Photocatalytic Reduction of BrO₃

Abstract:

The effects of various inorganic anions (SO₄²⁻, NO₃⁻, HCO₃⁻/CO₃²⁻, Cl⁻ and I⁻) on the photocatalytic reduction of BrO₃^- were investigated under UV light irradiation. The effects of the inorganic anions depend strongly on the property of radical scavenging and adsorption. At the concentration of 1.56 μmol/L, NO₃⁻, SO₄²⁻, HCO₃⁻/CO₃²⁻, Cl⁻ and I⁻ exhibit the property of radical scavenging and promote the reduction of bromate. At higher concentration than 1.56 μmol/L, NO₃⁻, SO₄²⁻, and HCO₃⁻/CO₃²⁻ exhibit the property of adsorption and decrease the promotion of the reduction of bromate. Cl⁻ has little effect on the reduction of bromate, it is due to the ability of the radical scavenging is lower than that of Br⁻. Only I⁻ has a higher promotion of the reduction of bromate at higher concentration than 15. 64 μmol/L, it is due to the strongly reduction potential E₀(•I/ I⁻).

• Periodical: Advanced Materials Research (Volume 428)
• Pages: 69-72
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.428.69
• Online since: January 2012
• Authors: Rong Shu Zhu, Fei Tian, Wen Yi Dong, Feng Ouyang, Ling Ling Zhang
• Keywords: BrO₃, Inorganic Anion, Photocatalytic Reduction, TiO₂

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