Synthesis Of Zinc Oxide Nanoparticles (ZnO) By Polyol Method For Concentration Reduction Of Malachite Green And Rhodamine B Dye Via Photocatalytic

Putra, Ceisar Andrian (2022) Synthesis Of Zinc Oxide Nanoparticles (ZnO) By Polyol Method For Concentration Reduction Of Malachite Green And Rhodamine B Dye Via Photocatalytic. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Nanopartikel seng oksida (ZnO-P) disintesis melalui metode poliol sebagai bahan fotokatalisis dengan konsentrasi Zn2+ (z) = 0,5 mol/L; rasio basa terhadap Zn2+ (b) = 1, dan rasio H2O terhadap Zn2+ (h) = 5 (ZnOP-A) dan 20 (ZnOP-B) untuk penurunan konsentrasi zat warna malachite green dan rhodamin b. ZnO-P dikarakterisasi dengan X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), UV-Diffuse Reflectance (UV-DRS), dan Fourier Transform Infrared (FT-IR). Hasil karakterisasi menunjukkan bahwa ZnO-P yang disintesis melalui metode poliol memiliki struktur kristal heksagonal, ukuran partikel kurang dari 100 nm, serta memiliki energi celah pita (Eg) sebesar 3,2 eV. Partikel yang dihasilkan memiliki bentuk berbeda sesuai dengan rasio hidrolisis. Partikel yang disintesis dengan rasio hidrolisis = 5 (ZnOP-A) memiliki bentuk bulat (spheris) dan sedikit memanjang, sedangkan partikel yang disintesis dengan rasio hidrolisis = 20 (ZnOP-B) memiliki bentuk kerucut (conical). Nanopartikel seng oksida diuji aktivitas fotokatalisisnya terhadap penurunan konsentrasi zat warna malachite green dan rhodamin b dengan konsentrasi larutan sebesar 20, 30, dan 40 mg L-1 dibawah penyinaran UV-LED. Diperoleh hasil bahwa ukuran dan morfologi partikel mempengaruhi kinerja partikel dalam penurunan konsentrasi zat warna. Penurunan konsentrasi zat warna rhodamin b terbesar oleh nanopartikel seng oksida (ZnOP-A) sebesar 98,454% dalam waktu 12 menit penyinaran, sedangkan untuk zat warna malachite green sebesar 99,030% dalam waktu 120 menit penyinaran.
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Zinc oxide nanoparticles (ZnO-P) were synthesized using the polyol method as a photocatalytic agent carried out with concentration of Zn2+ (z) = 0,5 mol/L, base ratio to Zn2+ (b) = 1, and ratio of H2O to Zn2+ (h) = 5 (ZnOP-A) and 20 (ZnOP-B) for concentration reduction of malachite green and rhodamine B dyes. ZnO-P was characterized by X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), UV-Diffuse Reflectance (UV-DRS), and Fourier Transform Infrared (FT-IR). The characterization results showed that the ZnO-P synthesized through the polyol method had a hexagonal crystal structure, particle size less than 100 nm, and had a band gap energy (Eg) around 3,2 eV. The obtained particles have different shapes according to the hydrolysis ratio. Particles synthesized with a hydrolysis ratio = 5 (ZnOP-A) had a spherical shape and slightly elongated, while the particles synthesized with a hydrolysis ratio = 20 (ZnOP-B) had a conical shape. Zinc oxide nanoparticles were tested for their photocatalytic activity for concentration reduction of malachite green and rhodamine B dyes, the concentrations are 20, 30 and 40 mg L-1 under UV-LED irradiation. It was found that the particle size and morphology affect the performance of the particles in decreasing the dye concentration. The biggest concentration reduction of rhodamine b dye by zinc oxide nanoparticles (ZnOP-A) was 98,454% within 12 minutes of irradiation, while for malachite green dye was 99,030% within 120 minutes of irradiation.

Item Type:	Thesis (Other)
Additional Information:	RSKi 541.35 Put s-1 2022
Uncontrolled Keywords:	Nanopartikel seng oksida, poliol, fotokatalisis, malachite green, rhodamin b. Zinc oxide nanoparticles, poliol, photocatalytic, malachite green, rhodamine b.
Subjects:	Q Science > QD Chemistry > QD716 Photocatalysis.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	07 May 2026 03:27
Last Modified:	07 May 2026 03:27
URI:	http://repository.its.ac.id/id/eprint/133039

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