Factors influencing the photocatalytic degradation of Rhodamine B by TiO₂-coated non-woven paper

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• 作者：Noureddine Barka ; Samir Qourzal ; Ali Assabbane ; Abederrahman Nounah ; Yhya Ait-Ichou
• 关键词：Photocatalytic degradation ; Rhodamine B ; TiO₂ ; Non-woven paper ; Inorganic salts
• 刊名：Journal of Photochemistry and Photobiology A ; Chemistry
• 出版年：2008
• 期刊代码：66_10106030
• 类别：ch
• 出版时间：15 April 2008
• 卷：195
• 期：2-3
• 页码：346-351
• 文件大小：374 K

摘要

The photocatalytic degradation of Rhodamine B (RhB) has been investigated in aqueous solutions using TiO₂-coated non-woven paper as photocatalyst. The experiments were carried out to investigate the factors that influence the RhB photocatalytic degradation, such as adsorption, initial concentration of dye solution, temperature, and some inorganic species commonly present in real wastewaters such as Cl⁻, NO₃⁻, SO₄²⁻, CH₃COO⁻ and HPO₄²⁻. The experimental results show that adsorption is an important parameter in controlling the apparent kinetic order of the degradation. The photocatalytic reaction is favoured by a high concentration in respect to Langmuir–Hinshelwood model. The photodegradation was temperature-dependent with a high degradation rate at high temperature. The presence of the Cl⁻, CH₃COO⁻ and HPO₄²⁻ ions leads to the reduction of the effectiveness of the photodegradation. However, the presence of SO₄²⁻ increases the rate of the degradation.