Benner
هناء كاظم الموسوي ( مدرس )
كلية العلوم - الكيمياء
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Study the Photodegradation of Aniline Blue dye in aqueous Phase by using Different Photocatalysts
تحميل
بحث النوع:
علوم التخصص العام:
Hanaa Kadtem Egzar اسم الناشر:
Muthana Saleh Mashkour and Amer Muosa Juda اسماء المساعدين:
Asian Transactions on Basic and Applied Sciences الجهة الناشرة:
Asian Transactions on Basic and Applied Sciences (ATBAS ISSN: 2221-4291) Volume 03 Issue 02  
2013 سنة النشر:

الخلاصة

This study involves the photocatalytic degradation of Aniline blue(AB) dye, employing heterogeneous photocatalytic process. Photocatalytic activity of different semiconductors such as zinc oxide (ZnO) ,zinc sulfide (ZnS) and Tin dioxide (SnO2) has been investigated. An attempt has been made to study the effect of process parameters through amount of catalyst, concentration of dye, pH of dye solution and temperature on photocatalytic degradation of AB solution. The experiments were carried out by varying pH (2-12), amount of catalyst (0.05–1.5 g), initial concentration of dye (25–100ppm ) and temperature range(293-323)K. The optimum catalyst dose was found to be( 0.1 ,0.5 g and 1) g\L by using ZnO ,ZnS and SnO2, respectively. In the case of ZnO and SnO2 , maximum rate of photoreaction of AB solution was observed in acidic medium at pH 4, whereas the degradation of AB reached maximum at pH 5 when using ZnS catalyst . The performance of photocatalytic system employing ZnO/UV light was observed to be better than ZnS /UV and SnO2/UV system. The complete degradation of AB was observed after 12 min with ZnO, whereas with ZnS, only 75% dye degraded and 24.5% with SnO2in 12 min. Photocatalytic degradation was found to increase with increasing temperature. Arrhenius plot shows that the activation energy is equal to 20.94 kJ mol−1 with ZnO, 17.97 kJ mol−1 with ZnS and 14.1 mol−1 with SnO2 catalyst.