Photocatalytic degradation of cetylpyridinium chloride over titanium dioxide powder

• Published in: Journal of photochemistry and photobiology. A, Chemistry. Vol. 108; no. 1; pp. 85 - 88
• Main Authors: Singhal, Bhawana, Porwal, Anugya, Sharma, Ajay, Ameta, Rameshwar, Ameta, Suresh C.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 31-07-1997; Elsevier Science
• Subjects: Chemistry; Exact sciences and technology; General and physical chemistry; Photocatalysis; Photochemistry; Physical chemistry of induced reactions (with radiations, particles and ultrasonics); Surfactant degradation; Titanium dioxide; Surfactant degradation; Titanium dioxide; Photocatalysis; Catalytic reaction; Transition metal Compounds; Cationic surfactant; Experimental study; Photolysis; Medium effect; Concentration effect; Visible radiation; Reaction mechanism; pH; Kinetic parameter; Aqueous solution; Rate constant; Titanium oxide
• ISSN: 1010-6030; 1873-2666
• DOI: 10.1016/S1010-6030(97)00009-9

The photocatalytic degradation of cetylpyridinium chloride (CPC) over titanium dioxide photocatalyst was investigated. The effects of various parameters, such as the pH, concentration of surfactant, amount of semiconductor, particle size, light intensity, etc., were observed and are discussed. The photocatalytic degradation of CPC follows pseudo-first-order kinetics and the rate constant was determined using the expression Rate constant
k + 2.303 × slope The final products of degradation were characterized and a tentative mechanism was proposed for the photocatalytic degradation of cetylpyridinium chloride.