Sintesis Fotokatalis CuFe2O4/N-TiO2 untuk Penghilangan Zat Warna Metilen Biru pada Radiasi Sinar Tampak

Nurhaqi, Abda (2024) Sintesis Fotokatalis CuFe2O4/N-TiO2 untuk Penghilangan Zat Warna Metilen Biru pada Radiasi Sinar Tampak. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5004201051-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 October 2026. Download (5MB) | Request a copy

Abstract

Fotokatalis CuFe2O4/N-TiO2 digunakan untuk penghilangan zat warna metilen biru (MB) pada radiasi sinar tampak dan ditentukan juga variasi penambahan CuFe2O4 yang optimal pada fotokatalis CuFe2O4/N- TiO2 untuk penghilangan zat warna metilen biru dibawah radiasi sinar tampak. N-TiO2 disintesis melalui metode impregnasi bubuk TiO2 dengan urea sebagai sumber nitrogen, CuFe2O4 disintesis melalui metode kopresipitasi, dan komposit CuFe2O4/N-TiO2 disintesis melalui metode impregnasi basah dengan bantuan ultrasonikasi. Berbagai karakterisasi meliputi X-ray diffraction (XRD), UV-Diffuse Reflectance Spectroscopy (UV-DRS), scanning electron microscopy (SEM), dan Fourier transform infrared spectroscopy (FT-IR) telah dilakukan. Hasil uji UV-DRS menunjukkan penurunan bandgap TiO2 setelah didoping nitrogen dan penambahan co-katalis CuFe2O4. Proses penghilangan fotokatalitik metilen biru (MB) dilakukan dengan adanya radiasi sinar tampak dari lampu LED putih 40 W. Didapatkan hasil penghilangan MB dalam waktu 180 menit radiasi sinar tampak yaitu sebesar 28,88%, 21,20%, dan 98,70% dengan menggunakan katalis TiO2, CuFe2O4, dan N-TiO2 sehingga dapat diketahui bahwa material CuFe2O4 dan TiO2 tidak mampu menghilangkan MB sedangkan N-TiO2 mampu menghilangkan MB pada radiasi sinar tampak. Penambahan doping nitrogen pada TiO2 mampu meningkatkan aktivitas katalis pada sinar tampak. Hasil penghilangan MB setelah 180 menit radiasi sinar tampak dengan komposit 0,5, 1, 5, 10, 20% CuFe2O4 /N-TiO2 yaitu sebesar 98,55%, 97,93%, 97,56%, 90,25%, dan 87,71%. Dapat disimpulkan bahwa penambahan co-katalis CuFe2O4 meningkatkan sifat magnetik komposit CuFe2O4/N-TiO2 tetapi mengurangi performa penghilangan MB karena CuFe2O4 menutupi situs aktif N-TiO2, deaktivasi radikal O2• − dan mengurangi intermediet kontaminan target (TC•+/ TC•(-H)) karena diubah kembali ke senyawa induknya oleh ion logam Cu dan Fe. Variasi komposit optimal yaitu 5% CuFe2O4/N-TiO2 yang memiliki sifat magnetik dan performa penghilangan MB dibawah iradiasi cahaya tampak dalam waktu 180 menit yang baik yaitu sebesar 97,56% dan dapat digunakan kembali hingga tiga siklus reaksi dengan nilai degadasi diatas 90%. Spesi radikal O2• − merupakan spesi utama untuk penghilangan metilen biru, diikuti oleh spesi •OH, h+ dan e-.

======================================================================================================

CuFe2O4/N-TiO2 photocatalyst is used for the photocatalytic removal of methylene blue (MB) dye under visible light and the optimal variation of CuFe2O4 addition to the CuFe2O4/N- TiO2 photocatalyst for the removal of methylene blue dye under visible light radiation was also determined. N-TiO2 was synthesized via the impregnation method of TiO2 powder and urea as a nitrogen source aided by ultrasonication, CuFe2O4 was synthesized via the coprecipitation method. CuFe2O4/N-TiO2 was synthesized via the wet impregnation method aided by ultrasonication. Various characterizations including X-ray diffraction (XRD), UV Diffuse Reflectance Spectroscopy (UV-DRS), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FT-IR) have been carried out. The UV-DRS test results show a decrease in the TiO2 bandgap after nitrogen doping and the addition of CuFe2O4 co-catalyst. The photocatalytic removal process of methylene blue was carried out using visible light radiation from a 40 W white LED lamp. The MB removal results obtained within 180 minutes of visible light radiation were 28,88%, 21,20%, and 98,70% using a TiO2, CuFe2O4, and N-TiO2. So it can be seen that CuFe2O4 and TiO2 materials are not able to remove MB while N-TiO2 is able to remove MB under visible light radiation. The addition of nitrogen doping to TiO2 increased catalyst activity is visible light. MB removal results after 180 minutes of visible light radiation with 0.5, 1, 5, 10, 20% CuFe2O4/N-TiO2 composites were 98,55%, 97,93%, 97,56%, 90,25%, and 87,71%. It can be concluded that addition of CuFe2O4 co-catalyst improves the magnetic properties of CuFe2O4/N-TiO2 composite but reduces the removal of MB performance because CuFe2O4 covers the active site of N-TiO2, deactivating O2•- radicals and target contaminant intermediate radicals (TC•+/ TC•(-H)) because it is converted back to its parent compound by Cu and Fe metal ions. The optimal composite variation is 5% CuFe2O4/N-TiO2 that exhibited good magnetic properties and MB removal performance were 97.56% under visible light irradiation for 180 minutes and can be reused for up to three reaction cycles with a removal value exceeding 90%. The O2 •− radical species is the main species for methylene blue removal, followed by •OH, h+ and e- species.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	CuFe2O4, N-TiO2, Penghilangan Pewarna, Fotokatalitik, Metilen Biru, Pengolahan Air Limbah CuFe2O4, N-TiO2, Removal of Dye, Photocatalytic, Methylene Blue, Wastewater Treatment
Subjects:	Q Science > QD Chemistry > QD502 Chemical kinetics Q Science > QD Chemistry > QD716 Photocatalysis.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Abda Nurhaqi
Date Deposited:	12 Aug 2024 07:45
Last Modified:	12 Aug 2024 07:45
URI:	http://repository.its.ac.id/id/eprint/115158

Actions (login required)

View Item