Uji antibakteri senyawa SrBi2Ta2O9 yang diperoleh dari metode sintesis lelehan garam

ABSTRACT:

Aurivillius compounds have the opportunity to be used as photocatalyst compounds that have the potential to be used as antibacterials. This study aims to determine the crystal structure, particle size, morphology, band gap energy and photocatalytic activity of SrBi2Ta2O9 compounds against antibacterial tests synthesized using the NaCl/KCl mixed salt melt method. The diffractogram of the SrBi2Ta2O9 compound shows that the sample was successfully synthesized, but an impurity phase was formed as indicated by the presence of peaks at 2θ (o): (a) 52.6o is Ta2O5, (b) 58o is Bi2O3, (c)37.8 and 56.1o is Bi24O36. SEM images show that the morphological shape obtained is plate-like which still has agglomeration with a relatively large particle area in the range of 1.70673 ± 0.14407 µm2. UV-Vis DRS spectra show that SrBi2Ta2O9 compounds have band gap energies of 2.8 and 3.06 eV. In the antibacterial activity test, the SrBi2Ta2O9 compound with light and without light decreased, the decrease in growth in conditions without light showed that the SrBi2Ta2O9 compound could inhibit bacterial growth without a photocatalyst mechanism caused by the SrBi2Ta2O9 compound having antibacterial properties.

ABSTRACT:

Aurivillius compounds have the opportunity to be used as photocatalyst compoundsthat have the potential to be used as antibacterials. This study aims to determine the crystalstructure, particle size, morphology, band gap energy and photocatalytic activity of SrBi2Ta2O9compounds against antibacterial tests synthesized using the NaCl/KCl mixed salt melt method.The diffractogram of the SrBi2Ta2O9 compound shows that the sample was successfullysynthesized, but an impurity phase was formed as indicated by the presence of peaks at 2θ(o): (a) 52.6o is Ta2O5, (b) 58o is Bi2O3, (c)37.8 and 56.1o is Bi24O36. SEM images show that themorphological shape obtained is plate-like which still has agglomeration with a relatively largeparticle area in the range of 1.70673 ± 0.14407 μm2. UV-Vis DRS spectra show thatSrBi2Ta2O9 compounds have band gap energies of 2.8 and 3.06 eV. In the antibacterial activitytest, the SrBi2Ta2O9 compound with light and without light decreased, the decrease in growthin conditions without light showed that the SrBi2Ta2O9 compound could inhibit bacterial growthwithout a photocatalyst mechanism caused by the SrBi2Ta2O9 compound having antibacterialproperties

مستخلص البحث:

مركمضادات للبكترياي. كبات حمفزة ضوئية لديها القدرة على استخدامهاكمر أوريفيليوس لديها الفرصة الستخدامهايهدف هذاالبحثكيب البلوريإىل حتديد الرتكباتوحجم اجلسيمات والتشكل وطاقة فجوة النطاق ونشاط التحفيز الضوئي ملرSrBi2Ta2O9ضد االختبارات املضادة للبكترياي اليت مت تصنيعها ابستخدامطريقة ذوابن ملح خليط كلوريد الصوديومNaCl/KCl.كباملرSrBi2Ta2O9أن العينة قد مت تصنيعها بنجاح، ولكن مت تشكيل مرحلة الشوائب واليت يشارإليها بوجود قمم عند٢θ (0):(أ)٥٢.٦٠هوTa٢O٥)ب( ،٥٨٠هيBi٢O٣)و (ج ،٣٧.٨و٥٦.١٠هيBi٢٤O٣٦.تظهر النتائج من الصوراجملهريةSEMذلك. الشكل املورفولوجي الذي مت احلصول عليه يشبه الصفيحة اليت ال تزال حتتوي على تكتالت ذات مساحة جسيمات كبرية نسبيا يف حدود٧٠٦٧٣.١±١٤٤٠٧.٠mμ٢. تظهر أطيافDRSكبلألشعة املرئية وفوق البنفسجية أن املرSrBi2Ta2O9لديه طاقات فجوة نطاق تبلغ٨.٢و٣.٠٦كباتفولت. يف اختبار النشاط املضاد للبكترياي ملرSrBi2Ta2O9مع اخنفاض الضوء أو بدون ضوء، أظهر اخنفاض النمو يف الظروف بدون ضوء أنكباتمرSrBi2Ta2O9كباتميكن أن متنع منو البكترياي دون آلية حمفز ضوئي انجتة عن مرSrBi2Ta2O9هلا خصائص مضادة للجراثيم.