SINTESIS Zn-MCM-41 DENGAN METODE SONOKIMIA UNTUK ADSORPSI ZAT WARNA METILEN BIRU

NUR HASANAH, Dr. Sutarno, M.Si.

2014 | Tesis | S2 Ilmu Kimia

Telah dipelajari pengaruh waktu sonikasi dalam sintesis MCM-41 dan pengaruh rasio mol Si/Zn dalam sintesis Zn-MCM-41 dengan metode sonokimia pada temperatur kamar. MCM-41 disintesis menggunakan tetraetil ortosilikat (TEOS) dan surfaktan cetiltrimetilamonium bromida (CTAB) dengan rasio mol Sur/Si=0,16. Pengaruh waktu sonikasi dipelajari dengan variasi waktu sonikasi 0,5, 1, 2, 3, dan 4 jam, sedangkan pengaruh rasio mol Si/Zn dipelajari dengan variasi rasio mol Si/Zn=33,33, 50, 100, dan 200. Studi tentang pengaruh waktu sonikasi dan rasio mol Si/Zn meliputi parameter struktural material dan kemampuan material untuk mengadsorpsi metilen biru. Hasil penelitian menunjukkan bahwa peningkatan waktu sonikasi meningkatkan kristalinitas dan keteraturan pori material. Waktu optimum sonikasi tercapai pada waktu sonikasi 3 jam. Hasil optimum untuk Zn-MCM-41 tercapai pada rasio mol Si/Zn=100. Waktu kontak optimum adsorpsi metilen biru dengan MCM-41 adalah 60 menit dan Zn-MCM-41 adalah 45 menit. Kapasitas adsorpsi terhadap metilen biru pada Zn-MCM-41 sebesar 85,47 mg/g lebih besar daripada MCM-41 dengan kapasitas adsorpsi 33,78 mg/g. Kata kunci: MCM-41, Zn-MCM-41, sonokimia, adsorpsi, metilen biru

The effects of sonication time on synthesis of MCM-41 and Si/Zn mol ratio on synthesis of Zn-MCM-41 by sonochemical method at room temperature have been studied. MCM-41 was synthesized from tetraethyl ortosilicate (TEOS) and cetyltrimethylammonium bromide (CTAB) as surfactant with Sur/Si mol ratio 0.16. The effect of sonication time was studied with variation of sonication time of 0.5, 1, 2, 3, and 4 hours, and the effect of Si/Zn mol ratio was studied with variation of Si/Zn mol ratio of 33.33, 50, 100, and 200. The effect of sonication time and Si/Zn mol ratio on synthesis was investigated from structural parameter of the synthesized material and its ability to adsorb methylene blue. The result showed that the addition of sonication time increased the crystallinity and pore regularity of the synthesized material. The optimum sonication time was reached on 3 hour. The optimum result of Zn-MCM-41 was achieved for Si/Zn mol ratio of 100. The optimum contact time on methylene blue adsorption with MCM-41 was 60 minutes, whereas Zn-MCM-41 was 45 minutes. The adsorption capacity for methylene blue on Zn-MCM-41 was 85.47 mg/g that was higher than that of MCM-41 which the adsorption capacity was 33.78 mg/g. Key words: MCM-41, Zn-MCM-41, sonochemistry, adsorption, methylene blue

Kata Kunci : MCM-41, Zn-MCM-41, sonokimia, adsorpsi, metilen biru