SINTESIS ZnO/MCM-41 SECARA SONOKIMIA UNTUK FOTODEGRADASI ZAT WARNA METILEN BIRU; SYNTHESIS OF ZnO/MCM-41 BY SONOCHEMICAL METHOD FOR PHOTODEGRADATION OF METHYLENE BLUE DYE

Rissa Laila Vifta, Sutarno

2014 | Disertasi | PROGRAM STUDI S2 ILMU KIMIA

Synthesis of ZnO/MCM-41 by sonochemical method for photodegradation of methylene blue dye has been attempted. The aim of the research was (i) to see the effects of sonochemical method on the characteristic of MCM-41, (ii) to find out the effects of Zn percentage on characteristic of ZnO/MCM-41, and (iii) to find out the photocatalytic activity of ZnO/MCM-41 for degradation of methylene blue dye. In this research, MCM-41 was synthesized by sonochemical method while ZnO-MCM-41 was prepared by post synthesis method. All of the products were characterized by IR, XRD, isotherm adsorption desorption N2, TEM, and DR-UV, then applied for photodegradation of methylene blue dye. The result showed that the optimum synthesis of MCM-41 was obtained with sonication time of 3 hours and percentage of Zn 36%. MCM-41 showed higher surface area and pore size than ZnO/MCM-41 that was 894.7 m2/g dan 31.42 Å while ZnO/MCM-41 was 808.4 m2/g dan 26.5 Å. ZnO/MCM-41 had wavelength absorption at 325 nm with energy gap of 3.81 eV. The optimum condition of methylene blue degradation on as-synthesized ZnO/MCM41 was obtained at optimum time of 60 minutes even with and without UV radiation where the degradation percentage was 72.94 and 58.46%, respectively.

Kata Kunci : Sonokimia; MCM-41; ZnO/MCM-41; degradasi; metilen biru