STUDI AKTIFITAS FOTOKATALITIK MCM-41 TEREMBAN ZN PADA ZAT WARNA METILEN BIRU

R. L. Vifta(1), S. Sutarno(2), S. Suyanta(3),


(1) Jurusan Kimia, FMIPA, Universitas Gadjah Mada, Indonesia
(2) Jurusan Kimia, FMIPA, Universitas Gadjah Mada, Indonesia
(3) Jurusan Kimia, FMIPA, Universitas Gadjah Mada, Indonesia

Abstract

Pengujian aktifitas fotokatalitik material MCM-41 teremban Zn yang dilakukan secara post-synthesis telah berhasil dilakukan. Tujuan penelitian ini adalah mengetahui pengaruh pengembanan Zn secara post-synthesis terhadap material MCM-41 serta mengkaji kemampuan fotokatalitik ZnO/MCM-41 pada zat warna metilen biru. Material MCM-41 yang telah diemban dengan Zn dikarakterisasi menggunakan XRD, isoterm adsopsi gas N2, dan DR-UV, kemudian diaplikasikan untuk proses fotokatalitik zat warna metilen biru. Hasil penelitian menunjukkan bahwa adanya Zn pada material MCM-41 menurunkan kristalinitas dan keteraturan pori yang diikuti dengan terbentuknya oksida Zn pada permukaan MCM-41. ZnO/MCM-41 memiliki luas permukaan dan diameter pori lebih kecil dari MCM-41 yakni sebesar 808,4 m2/g dan 26,5 Å sedangkan MCM-41 894,7 m2/g dan 31,42 Å. ZnO/MCM-41 memiliki serapan panjang gelombang pada 325 nm dengan nilai energi gap 3,81 eV. Hasil pengujian aktivitas fotokatalitik pada material ZnO/MCM-41 terhadap zat warna metilen biru memberikan hasil sebesar 72,94% untuk perlakuan dengan UV dan 58, 46% tanpa UV.

Study of photocatalytic activity on MCM-41 material doped Zn by post-synthesis process has been done. The aim of the research is to see the influence of Zn doping on MCM-41 material and ability of photocatalytic ZnO /MCM-41 on blue dye methylene. MCM-41 doped Zn was characterized by XRD, isotherm adsorption N2, and DR-UV, then applied for photodegradation of blue dye methylene. The result shows that the presence of Zn in the MCM-41 material decreases the crystallinity and regularity of pore followed by the formation of zinc oxide on the surface of MCM-41. ZnO / MCM-41 has a smaller surface area and pore diameter than MCM-41 which equals to 808.4 m2/g and 26.5 Å, while MCM-41 894.7 m2/g and 31.42 Å. ZnO/MCM-41 has an absorption wavelength at 325 nm with an energy gap of 3.81 eV. The test result of photocatalytic activity on material ZnO/MCM-41 to blue dye methylene is 72.94% for treatment with UV and 58, 46% without UV.

Keywords

Aktivitas fotokatalitik, MCM-41 teremban Zn, metilen blue

Full Text:

PDF

References

Ali R, & Siew OB. 2005. Photodegradation of new methylene blue in aqueous solution using zinc oxide and titanium dioxide as catalyst, journal of chemistry. Chemistry Department, Faculty of Science. University Teknologi Malaysia. Johor Bahru. Malaysia.

Babu KS, Ramachandra RA, Sujatha CH, & Venugopal RK. 2013. Effect of precursor, temperature, surface area, and excitation wavelength on photoluminescence of ZnO/mesoporous silica nanocomposite. Ceram Int 39:3055-3064.

Beck JS, Vartuli JC, Schmitt KD, Kresge CT, Roth WJ, Leonowicz ME, Mccullen SB, Hellring, SD, Schlenker JL, Olson DH & Sheppard EW. 1992. A new family of mesoporous molecular sieves prepared with liquid crystal templates. J Am Chem Soc 114:10834-10843.

Corma A. 1997. From microporous to mesoporous molecular sieve material and their use in catalysis. Chem Rev 97: 2373-2419

Mihai GD, Meynen V & Mertens M. 2010. ZnO nanoparticles supported on mesoporous MCM-41 and SBA-15: a comparative physiochemical and photocatalytic study. J Mater Sci 45:5786-5794.

Ortiz HIM, Gracia CY & Olivares M. 2012. Preparation of spherical MCM-41 molecular sieve at room temperature : influence of the synthesis condition in the structural properties. Ceram Int 38: 6353-6358.

Sutarno. 2005. Synthesis of faujasite and MCM-41 from Fly Ash and Their Application as Hydrocracking Nickel Based Catalyst of Heavy Petroleum Distillates. Ph.D Thesis. Jurusan Kimia FMIPA UGM. Yogyakarta.

Tang GQ, Xiong Y, Zhang LZ & Zhang GL. 2004. Novel long-time photoluminescence of nanosized ZnO included in the mesoporous MCM-41. Chem Phys Lett 395: 97-102

Widihati IAG, Diantariani NP & Nikmah YF. 2011. fotodegradasi metilen biru dengan sinar uv dan katalis Al2O3. Jurnal Kimia 5(1): 31- 42.

Refbacks

  • There are currently no refbacks.




Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.