REDUKSI LOGAM BERAT CHROMIUM (VI) DENGAN FOTOKATALIS KOMPOSIT TiO2-SiO2

  • Candra Purnawan

Abstrak

Abstracts
Composite TiO2-SiO2 has been synthesized using sol-gel process with starting materials
TiCl4 and Na2SiO3. The purposes of this research were to know the effect of composite
composition, pH solution and UV radiation time for reduced Chromium (VI) cations. The
identification and characterization of composite were done by infrared spectroscopy (IR)
and X-Ray Diffraction. Condition of Chromium (VI) reduction by composite TiO2-SiO2 were
carried out with variation of composite TiO2-SiO2 concentration or the ratio Ti:Si were
1:0,1 ; 1:0,5 ; 1:1 ; 1:1,5 ; 1:2. Variation of pH solution in 3,0; 3,5; 4,0; 4,5; 5,0; 5,5; 6,0; 6,5;
7,0 and variation of UV radiation times in 2, 4, 6, 12, 18, 24, 30, 36, 42, 48 hours.
The result showed that XRD characteristic of TiO2-SiO2 composite showed 2q peaks at 22.94
degrees and 36.24 degrees. IR characteristic of TiO2-SiO2 showed absorption of Ti-O-Si in
the wave number 962 cm-1. The optimum reduction of Chromium (VI) cations using TiO2-
SiO2 composite in Ti:Si = 1:1 composition, pH 3 and with 18 hours radiation times.

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Candra Purnawan
Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam,
Universitas Sebelas Maret, Surakarta
Diterbitkan
2013-08-01
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PURNAWAN, Candra. REDUKSI LOGAM BERAT CHROMIUM (VI) DENGAN FOTOKATALIS KOMPOSIT TiO2-SiO2. Bumi Lestari Journal of Environment, [S.l.], v. 13, n. 2, aug. 2013. ISSN 2527-6158. Tersedia pada: <https://ojs.unud.ac.id/index.php/blje/article/view/6642>. Tanggal Akses: 14 oct. 2025
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Terbitan
Vol 13 No 2 (2013)
Bagian
Original Research Articles

Kata Kunci

Keywords: composite TiO2-SiO2, reduction of Chromium (VI), SiO2 concentration, pH, and radiation time

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