Sintesis dan Karakterisasi Katalis Magnesium Seng Fluorida (MZF) serta Optimasi Massa Reduktor dan Metode Aktivasi pada Reaksi Reduksi p-Nitrofenol Menjadi p-Aminofenol

Mita, Mita Farchatin Nazidah (2026) Sintesis dan Karakterisasi Katalis Magnesium Seng Fluorida (MZF) serta Optimasi Massa Reduktor dan Metode Aktivasi pada Reaksi Reduksi p-Nitrofenol Menjadi p-Aminofenol. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Katalis magnesium seng fluorida (MZF) dengan komposisi 0,1 mol Zn dan MgF₂ berhasil disintesis menggunakan metode *sol-gel*. Katalis hasil sintesis dikarakterisasi menggunakan X-ray Diffractometer (XRD), spektrofotometer FTIR, adsorpsi piridin-FTIR, serta analisis adsorpsi-desorpsi N₂. Produk akhir yang diperoleh berupa serbuk katalis MZF berwarna putih gading. Pola difraksi MZF menunjukkan bahwa proses doping Zn pada katalis MgF₂ berlangsung tanpa mengubah struktur kristal tetragonal MgF₂. Spektrum FTIR katalis MZF memperlihatkan pergeseran puncak ke bilangan gelombang yang lebih rendah dibandingkan MgF₂. Katalis MZF memiliki jumlah situs asam Lewis dan Brønsted yang lebih tinggi daripada MgF₂, dengan dominasi situs asam Brønsted. Luas permukaan katalis MgF₂ sebesar 13,940 m²/g meningkat menjadi 23,933 m²/g setelah proses doping Zn. Aktivitas katalis MZF diuji pada reaksi reduksi *p*-nitrofenol (PNP) menjadi *p*-aminofenol (PAP) menggunakan NaBH₄ sebagai reduktor dengan variasi massa 5, 10, 15, 20, dan 25 mg serta tiga metode aktivasi PNP. Kondisi optimum dicapai pada massa reduktor 20 mg menggunakan Metode Aktivasi 3 (MA3), yaitu aktivasi *p*-nitrofenol dengan NaBH₄ selama 5 menit yang diikuti dengan penambahan katalis MZF, menghasilkan konversi PNP sebesar 88,83%, *yield* PAP sebesar 57,45%, dan selektivitas PAP sebesar 64,67%. Hasil penelitian membuktikan bahwa doping Zn pada MgF₂ secara signifikan meningkatkan aktivitas dan selektivitas katalis.
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Magnesium zinc fluoride (MZF) catalyst containing 0.1 mol Zn and MgF₂ was successfully synthesized using the *sol-gel* method. The synthesized catalyst was characterized using X-ray diffraction (XRD), Fourier Transform Infrared (FTIR) spectroscopy, pyridine-FTIR adsorption, and N₂ adsorption-desorption analysis. The final product was obtained as an ivory-white MZF catalyst powder. The XRD diffraction pattern indicates that Zn doping occurred without altering the tetragonal crystal structure of MgF₂. The FTIR spectrum of the MZF catalyst exhibits a shift in absorption peaks toward lower wavenumbers compared to MgF₂. The MZF catalyst possesses a greater number of Lewis and Brønsted acid sites than MgF₂, with Brønsted acid sites being predominant. The surface area increased from 13.940 m²/g for MgF₂ to 23.933 m²/g for the MZF catalyst after Zn doping. The catalytic activity of MZF was evaluated in the reduction of *p*-nitrophenol (PNP) to *p*-aminophenol (PAP) using NaBH₄ as the reducing agent with masses of 5, 10, 15, 20, and 25 mg, as well as three different PNP activation methods. The optimum condition was achieved using 20 mg of NaBH₄ with Activation Method 3 (MA3), in which *p*-nitrophenol was activated with NaBH₄ for 5 minutes prior to the addition of the MZF catalyst, resulting in a PNP conversion of 88.83%, a PAP yield of 57.45%, and a PAP selectivity of 64.67%. These results demonstrate that Zn doping on MgF₂ significantly enhances the catalytic activity and selectivity.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	magnesium seng fluorida, MgF2, doping Zn, reduksi p-nitrofenol, p-aminofenol
Subjects:	Q Science > QD Chemistry > QD1 Oxidation-reduction reaction. Q Science > QD Chemistry > QD501 Catalysis. Catalysts.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Mita Farchatin Nazidah
Date Deposited:	22 Jul 2026 03:20
Last Modified:	22 Jul 2026 03:20
URI:	http://repository.its.ac.id/id/eprint/136174

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