Penggunaan Ko-Katalis Ganda NiSe Dan CuSe Pada Fotokatalis N-TiO₂ Untuk Produksi Hidrogen Melalui Water Splitting

Salsabila, Afra (2026) Penggunaan Ko-Katalis Ganda NiSe Dan CuSe Pada Fotokatalis N-TiO₂ Untuk Produksi Hidrogen Melalui Water Splitting. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kebutuhan energi yang terus meningkat sehingga mendorong pengembangan hidrogen yang ramah lingkungan melalui photocatalytic water splitting. Penelitian ini mengkaji penggunaan ko-katalis ganda NiSe dan CuSe pada fotokatalis N-TiO₂ dengan variasi rasio Ni:Cu yakni 1:1, 1:3, dan 1:5. Berdasarkan hasil karakterisasi FTIR, XRD, dan FESEM-EDX menunjukkan keberhasilan pembentukan komposit NiSe/CuSe pada N-TiO₂. Penambahan ko-katalis ganda berhasil meningkatkan penyerapan cahaya tampak pada fotokatalis N-TiO₂ melalui penurunan nilai band gap dari 2,93 menjadi 2,73 eV serta menekan rekombinasi elektron-hole berdasarkan analisis PL dan fluoresensi. Variasi 1NiSe/1CuSe/N-TiO₂ menunjukkan laju produksi hidrogen tertinggi sebesar 855 μmol·g⁻¹·h⁻¹ yang dikaitkan dengan sinergi ko-katalis NiSe sebagai promotor transfer muatan dan CuSe sebagai penampung elektron (charge sink). Sinergi tersebut meningkatkan pemisahan pasangan elektron-hole, memperlancar transfer elektron menuju situs aktif reduksi proton, serta mempertahankan keseimbangan transfer muatan sehingga tidak terjadi dominasi salah satu ko-katalis yang dapat menurunkan efisiensi reaksi evolusi hidrogen.
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The increasing global energy demand has driven the development of environmentally friendly hydrogen production through photocatalytic water splitting. This study investigates the application of dual NiSe and CuSe co-catalysts on N-TiO₂ photocatalysts with Ni:Cu ratios of 1:1, 1:3, and 1:5. FTIR, XRD, and FESEM-EDX characterization confirmed the successful formation of NiSe/CuSe composites on the N-TiO₂ matrix. The incorporation of the dual co-catalysts enhanced visible-light absorption of N-TiO₂ photocatalysts by reducing the band gap value from 2.93 to 2.73 eV and effectively suppressed electron–hole recombination, as evidenced by photoluminescence (PL) and fluorescence analyses. The 1NiSe/1CuSe/N-TiO₂ photocatalyst exhibited the highest hydrogen production rate of 855 μmol·g⁻¹·h⁻¹, which was attributed to the synergistic roles of NiSe as a charge transfer promoter and CuSe as an electron reservoir (charge sink). This synergy enhanced electron-hole separation, facilitated electron transfer to the proton reduction active sites, and maintained balanced charge transfer thereby preventing either co-catalyst from becoming dominant and reducing the efficiency of the hydrogen evolution reaction.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	NiSe, CuSe, N-TiO₂, Fotokatalis, Produksi hidrogen. NiSe, CuSe, N-TiO₂, Photocatalyst, Hydrogen production.
Subjects:	Q Science Q Science > QD Chemistry Q Science > QD Chemistry > QD501 Catalysis. Catalysts. Q Science > QD Chemistry > QD716 Photocatalysis.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Afra Salsabila
Date Deposited:	01 Aug 2026 06:58
Last Modified:	01 Aug 2026 06:58
URI:	http://repository.its.ac.id/id/eprint/141669

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