Sintesis Dan Karakterisasi Heterojunction N-TiO2/NiSe Sebagai Material Fotokatalis Dalam Produksi Gas Hidrogen Melalui Proses Photocatalytic Water Splitting

Imazdalifa, Berlian (2025) Sintesis Dan Karakterisasi Heterojunction N-TiO2/NiSe Sebagai Material Fotokatalis Dalam Produksi Gas Hidrogen Melalui Proses Photocatalytic Water Splitting. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penggunaan energi fosil yang mencapai 80% sebagai bahan bakar menyebabkan kenaikan emisi karbon serta peningkatan suhu bumi. Salah satu energi bersih alternatif pilihan masa depan adalah hidrogen hijau. Hidrogen hijau dapat diproduksi melalui photocatalytic water splitting, yakni pemanfaatan energi cahaya untuk menguraikan molekul air (H2O) menjadi hidrogen (H2) dan oksigen (O2) dengan bantuan material semikondutor sebagai fotokatalis. Pada penelitian ini, telah dikembangkan fotokatalis heterojunction N-TiO2/NiSe (N-TN) karena berpotensi mempersempit energi celah pita (band gap) dan meminimalisir terjadinya rekombinasi elektron-hole sehingga dapat meningkatkan efsiensi produksi gas hidrogen. N-TiO2 disintesis melalui metode impregnasi antara TiO2 dan urea sebagai sumber nitrogen, NiSe disintesis dengan metode solvotermal, dan nanokomposit N-TN disintesis melalui metode impregnasi basah dengan bantuan ultrasonikasi. Sampel tersebut dikarakterisasi menggunakan FTIR, spektroskopi raman, XRD, FESEM-EDX, dan UV-DRS. Kinerja produksi gas hidrogen diketahui melalui pengujian photocatalytic water splitting dengan GC-TCD. Terdapat lima variasi yang digunakan yakni N-TiO2, N-TN dengan variasi penambahan NiSe sebesar 1, 3, 5, dan 10 wt% terhadap massa N-TiO2. Hasil karakterisasi UV-DRS menunjukkan adanya penurunan band gap dengan penambahan doping N pada TiO2. Nilai energi band gap terendah diperoleh sebesar 2,82 eV pada variasi penambahan NiSe 10%. Sementara itu, hasil uji aktivitas fotokatalitik menunjukkan bahwa penambahan NiSe 3% menghasilkan gas hidrogen sejumlah 49495 µmol g-1.h-1 pada penyinaran selama 3 jam. Kinerja rata-rata laju produksi gas hidrogen selama 3 jam pada sampel tersebut menunjukkan peningkatan sebesar 262% dibandingkan dengan rata-rata laju produksi gas hidrogen dari N-TiO₂. Hal ini membuktikan bahwa NiSe sebagai senyawa ko-katalis dapat mencegah rekombinasi pasangan elektron-hole sehingga meningkatkan aktivitas fotokatalitik produksi gas hidrogen.
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The use of fossil fuels, which accounts for up to 80% of global energy consumption, leads to increased carbon emissions and global warming. One of the promising alternatives for clean energy in the future is green hydrogen. Green hydrogen can be produced through photocatalytic water splitting, which utilizes light energy to decompose water molecules (H₂O) into hydrogen (H₂) and oxygen (O₂) using semiconductor materials as photocatalysts. In this study, a heterojunction photocatalyst of N-TiO₂/NiSe (N-TN) was developed due to its potential to narrow the band gap and minimize electron-hole recombination, thereby enhancing hydrogen gas production efficiency. N-TiO₂ was synthesized using impregnation method using TiO₂ and urea as the nitrogen source. NiSe was synthesized using solvothermal method, while N-TN nanocomposite was prepared through wet impregnation assisted by ultrasonication. The samples were characterized using FTIR, Raman spectroscopy, XRD, FESEM-EDX, and UV-DRS. The hydrogen production performance was evaluated through photocatalytic water splitting testing using GC-TCD. Five variations were tested, namely N-TiO₂ and N-TN with NiSe additions of 1%, 3%, 5%, and 10 wt% toward N-TiO2 mass. UV-DRS characterization showed a decrease in band gap energy with nitrogen doping in TiO₂, reaching a minimum of 2,82 eV in the 10% NiSe variation. Photocatalytic activity tests indicated that the 3% NiSe variation achieved a hydrogen production rate of 49495 µmol g-1.h-1 under 3 hours of irradiation. The sample increased up to 262% in the average hydrogen production rate compared to N-TiO₂. These results confirm that NiSe, as a cocatalyst, effectively suppress electron-hole recombination and significantly enhances photocatalytic hydrogen production activity.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Fotokatalis, Hidrogen, N-TiO2, NiSe, Photocatalytic Water Splitting Hydrogen, N-TiO2, NiSe, Photocatalyst, Photocatalytic Water Splitting
Subjects:	Q Science > QD Chemistry > QD716 Photocatalysis. T Technology > TP Chemical technology > TP155.7 Chemical processes. T Technology > TP Chemical technology > TP343 Liquid and gaseous fuel
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Berlian Imazdalifa
Date Deposited:	04 Aug 2025 10:29
Last Modified:	04 Aug 2025 10:29
URI:	http://repository.its.ac.id/id/eprint/124356

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