CD Tesis

Komposit Tio2/Cos Sebagai Fotoelektroda Untuk Pemecahan Molekul Air

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Hydrogen gas which is used as a fuel to generate electricity can be produced by water splitting through a photoelectrochemical reaction process. The synthesis of TiO2/CoS composites was carried out to form p-n junction between TiO2 and CoS which prevents electron-hole recombination to increase the photoelectrochemical activity of TiO2. In this research, thin film TiO2/CoS composites were synthesized by hydrothermal and ball milling methods. The determination of photoelectrochemical activity and hydrogen production was carried out on composites with 3 variations of %wt, namely, 90:10, 80:20 and 70:30 %w/w. XRD and FT-Raman analyzes confirmed the presence of CoS in all three samples, which is supported by the FESEM-EDX analysis. The morphology of TiO2/CoS is nanospheres. The results of UVR characterization obtained the smallest bandgap value at the M-30, that is 2.72 eV. The LSV results show that TiO2/CoS 30% (M-30) has the largest photocurrent density 0.32 mA/cm2 in the bias of 0.9 V vs Ag/AgCl. The highest hydrogen production was produced by TiO2/CoS 30% (M-30), that is 0.41 mmol/L at 30 minutes with hydrogen production rate of 0.41 mmol.h-1g-1. Based on the characteristics of the TiO2/CoS composites, it was found that the particle size, bandgap, and photocurrent density had an important role in hydrogen production. The smaller the particle size, the smaller the bandgap value and the greater of photocurrent density caused the higher amount of hydrogen production.
Key words : TiO2, CoS, p-n junction, photoelectrochemical, band gap.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

10 05. 220 (0021)

Penerbit

Pekanbaru : Universitas Riau – Pascasarjana – Tesis Kimia., 2020

Deskripsi Fisik

xi, 64 hlm,; ill.: 29 cm

Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

10 05. 220 (0021)

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

FATAH

Versi lain/terkait

Lampiran Berkas

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