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All Journal Jurnal Kimia dan Kemasan Makara Journal of Science
Adel Fisli
Pusat Teknologi Bahan Industri Nuklir, BATAN Kawasan Puspiptek, Serpong 15314, Tangerang Selatan
Chemistry

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Sintesis dan Karakterisasi Nano Zero Valent Iron (NZVI) dengan Metode Presipitasi Wardiyati, Siti; Fisli, Adel; Yusuf, Saeful
Jurnal Kimia dan Kemasan Vol. 35 No. 1 April 2013
Publisher : Balai Besar Kimia dan Kemasan

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Abstract

Teknologi NZVI (Nano Zero Valent Iron) menjadi pilihan yang tepat untuk rehabilitasi lingkungan dan remediasi situs yang terkontaminasi, karena dengan NZVI logam berat seperti Pb, As, Cr, Cd, Cu, dan senyawa organik dapat dengan mudah dipisahkan dari dalam air. Selain itu, bahan baku untuk pembuatan NZVI berupa zat besi relatif murah,tidak beracun, dan ramah lingkungan. Untuk mempelajari teknologi NZVI telah dilakukan sintesis dan karakterisasi NZVI dengan metode presipitasi menggunakan prekusor FeSO4.7H2O dan reduktor natrium borohidrat (NaBH4). Tujuan percobaan ini adalah membuat NZVI yang stabil, mempunyai ukuran kecil (dibawah 100 nm), dan tidak menggumpal. Untuk mencapai tujuan tersebut, pada proses sintesis NZVI ditambahkan surfaktan CTAB sebagai pelapis NZVI yang dihasilkan. Penambahan surfaktan yang tepat akan memberikan hasil optimal. Pada percobaan ini hasil optimal dicapai pada penambahan CTAB 1,4 g per 4,1703 g Fe2SO4.7H2O dan ukuran partikel NZVI yang dihasilkan berkisar 8 nm. 
Magnetically Separable Fe3O4/SiO2/TiO2 Photocatalyst Composites Prepared through Hetero Agglomeration for the Photocatalytic Degradation of Paraquat Gunlazuardi, Jarnuzi; Fisli, Adel; Ridwan, Ridwan; Krisnandi, Yuni Krisyuningsih; Robert, Didier
Makara Journal of Science Vol. 25, No. 4
Publisher : UI Scholars Hub

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A photocatalyst supported on magnetic material allows the simple technique by using an external magnetic material to separate photocatalyst from the treated water. Thus, it is a magnetically separable nanoparticles photocatalyst (MSNP). The use of superparamagnetic nanoparticles that do not pose spontaneous magnetic moment thus could be dispersed in water and can be recollected easily by an external magnetic bar. We prepare Fe3O4/SiO2/TiO2 composite by hetero agglomeration of Fe3O4/SiO2 and TiO2 at a pH range of 3 to 6.2 in an aqueous slurry.The Fe3O4/SiO2 was prepared via co-precipitation of iron (II) and iron (III) ionic solution containing ammonium hydroxide and sodium silicate. The prepared composites were characterized by XRD, TEM, FTIR, and VSM, while the photocatalytic activities were tested toward paraquat in water. Based on zeta potential values, the Fe3O4/SiO2and TiO2 were being hetero agglomerated at pH 5 to obtain Fe3O4/SiO­2/TiO2 composite. The XRD characterization confirmed the presence of anatase, rutile, and magnetite crystal phases. TEM images showed that the Fe3O4 was covered by SiO2 and randomly attached to TiO2. The observed FTIR peak at 940-960 cm-1 attributed to -Si-O-Ti- bonding mode, ensuring photocatalyst (TiO2) adherence to the Fe3O4/SiO2 cluster. The prepared Fe3O4/SiO2/TiO2 composite showed good photocatalytic activity for the paraquat removal and showed a good magnetic property (VSM measurement)
Co-Authors Jarnuzi Gunlazuardi Ridwan, Ridwan Robert, Didier Saeful Yusuf Siti Wardiyati Yuni Krisyuningsih Krisnandi, Yuni Krisyuningsih