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التحلل الضوئي لمحاليل 2,3 - ثنائي مثيل فينول باستخدام العوامل النانوية وغير النانوية ZnS وSnO2 , TiO المساعدة الضوئية == photo degradation of 2,3 - di methyl phenol solutions using nano and non nano photo catalysts of TiO2 , SnO2 and ZnS
اسم المؤلف:
فائز سمير صالح
اسم المشرف:
علي حسين الموالي | مؤيد نعيم خلف
الموضوع العام:
علوم الكيمياء
السنة:
2015
الموضوع الدقيق:
الكيمياء
الدرجة:
ماجستير
الجامعة:
جامعة البصرة - كلية العلوم - قسم الكيمياء
اللغة:
العربية
مكان الجامعة:
البصرة
الصفحات الاولى:
📎 25T1596 - p.pdf
المستخلص:
The work presented in this thesis is concerned with the preliminary study of semiconductor assisted photochemical degradation of 2,3 - dimethyl phenol by using powder and nano particles of TiO2 , SnO2 and ZnS . Degradation of 2,3 - dimethyl phenol was carried out by using ultraviolet light at wave length of 267 nm in the presence of oxygen . The absorptivity of 2,3 - dimethyl phenol decay was measured in the presence of u.v light and compared with the absorptivity in dark . The rate of degradation is increased with the weight of photocatalyst and reach maximum value of 0.1 gm (TiO2) , 0.5 gm (ZnS) and 1 gm (SnO2) . In this thesis , the effects of various operating parameters of the photolytic degradation of 2,3 - dimethyl phenol are presented . It was found that different parameters , such as type of photocatalyst , composition , light intensity , initial substrate concentration , amount of catalyst and pH of the reaction medium can play an important role on type and particle seize of nano TiO2 , ZnS and SnO2 play an important factor for acceleration the photo degradation . The activity of the nano particles was found in the order : TiO2 ZnS SnO2The results of photo degradation are represented by Langmuir - Hinshelwood relationship and indicate that the results are pseudo first order.The particle seize of TiO2 , ZnS, and SnO2 was estimated using XRD technique .
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