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PENGARUH STRUKTUR KRISTAL TiO2 DALAM DEGRADASI FOTOKATALITIK AMONIA DAN HIDROGEN SULFIDA Iis Sopyan
Jurnal Sains Materi Indonesia Vol. 3 No. 3 (2002): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jsmi.2002.3.3.5071

Abstract

PENGARUH STRUKTUR KRISTAL TiO2 DALAM DEGRADASI FOTOKATALITIK AMONIA DAN HIDROGEN SULFIDA. Film-film titanium dioksida dengan struktur anatase dan rutile telah dipreparasi dengan teknik sol-gel yang termodifikasi di atas pelat silika lebur. Pengaruh struktur kristal TiO2 terhadap karakteristik degradasi fotokatalitik gas amonia dan hidrogen sulfida telah diteliti. Dalam hal ini ditemukan bahwa film anatase memperlihatkan aktivitas fotokatalitik yang lebih tinggi daripada film rutile dalam semua reaksi fotokatalitik yang diamati. Akan tetapi, ditemukan adanya perbedaan karakteristik degradasi kedua gas tersebut akibat perbedaan kapasitas donor elektron dan sifat-sifat elektrokimia dari kedua reaktan tersebut.
PHOTOCATALYTIC KINETICS OF GASEOUS ACETALDEHYDE DEGRADATION ON LOW INTENSITY ULTRA VIOLET IRRADIATED TiO2 Iis Sopyan; Slamet; Irwan Moedrik
Jurnal Sains Materi Indonesia Vol. 3 No. 1 (2001): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jusami.2001.3.1.5245

Abstract

PHOTOCATALYTIC KINETICS OF GASEOUS ACETALDEHYDE DEGRADATION ON LOW INTENSITY ULTRA VIOLET IRRADIATED TiO2. The kinetics of photocatalytic degradation of gaseous acetaldehyde with semiconductor catalyst TiO2 was studied. The experiment was carried out using TiO2 photocatalyst prepared from titanium tetrachloride (TiCl4) and titanium(lV) isoproxide (Ti(OPr)4) as the starting materials. Comercially available highly active TiO2 from Merck was used for purposes ofcomparison The TiO2 films were prepared on soda lime plates and an SiO2-coated soda lime plate using sol-gel method and dip-coating techniques The photocatalytic kinetics of the catalysts were assessed by measuring the photodegradative oxidation of gaseous acetaldehyde at various initial concentrations, UV intensities, and shapes of catalyst. The Merck powder shown the highest photocatalytic activity. All reactions proceeded with approximately first-order reaction kinetics (as indicated from the linear transforms ln(C0/C) as function of irradiation time), especially for the relatively low initial concentration. Meanwhile, at high initial concentration of acetaldehyde, photocatalytic reactions occurred with approximately zero-order kinetics. TiO2 film photocatalyst supported on soda lime plate shown lower photocatalytic activity than the powder one, however, when the films were coated on SiO2-coated soda lime plate, photocatalytic activity of the resulting film increased and even higher than that of the powder form.
Co-Authors Irwan Moedrik Slamet