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All Journal Reaktor BERKALA FISIKA Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Jurnal Sains Materi Indonesia Chem Info YOUNGSTER PHYSICS JOURNAL Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Bulletin of Chemical Reaction Engineering & Catalysis JITEK (Jurnal Ilmiah Teknosains) Indonesian Journal of Chemistry Journal of Physics and Its Applications Astonjadro Jurnal Pijar MIPA Bulletin of Chemical Reaction Engineering & Catalysis JURNAL REKAYASA KIMIA & LINGKUNGAN

Iis Nurhasanah

Department Of Physics, Faculty Of Science And Mathematics, Diponegoro University, Jl. Prof. Soedarto SH, Tembalang, Semarang 50275, Indonesia

Author-ID : 334756

Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Energy Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Veterinary

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Synthesized of Double Layer Thin Film ZnO/ZnO:Ag by Sol-Gel Method for Direct Blue 71 Photodegradation Heri Sutanto; Singgih Wibowo; Eko Hidayanto; Iis Nurhasanah; Hady Hadiyanto
Reaktor Volume 15 No.3 April 2015
Publisher : Dept. of Chemical Engineering, Diponegoro University

The objective of this paper is to synthesize and to characterize a single and a double layer ZnO and ZnO/ZnO:Ag thin films and their application for degradation of direct blue 71. Double layer (DL) thin films of zinc oxide and silver-doped zinc oxide (ZnO/ZnO:Ag) were deposited on the substrate glass by using sol-gel spray coating technique. Ag doping variations (2, 4, 6 and 8 %mol) into ZnO were studied. X-Ray Diffractometer (XRD) and UV-Vis spectrophotometer were used to analyze structure and optical properties of thin films. Direct Blue 71 (DB71) was used for photocatalytic evaluation under UV light irradiation. XRD result showed that all prepared thin films have wurtzite structure with better crytalinity compared to double layer preparation and increasing concentration of Ag doping. UV-Vis transmittance spectra showed that decreasing of transparency of films followed by DL preparation and Ag doping concentration. By using envelope method, energy gap of films can be determined. ZnO/ZnO:Ag 6% (DL 6%) indicated the smallest energy gap 3,038 eV. The highest DB71 degradation result under UV light irradiation was reached by DL 6% with 55.43% and 8.56 x 10-3 min-1 for photocatalytic efficiency and photodegradation rate, respectively.

THE CALCINATION TEMPERATURE EFFECT ON THE ANTIOXIDANT AND RADIOPROTECTION PROPERTIES OF CeO2 NANOPARTICLES Iis Nurhasanah; Weni Safitri; Tri Windarti; Agus Subagio
Reaktor Volume 18 No. 1 March 2018
Publisher : Dept. of Chemical Engineering, Diponegoro University

The CeO2 nanoparticles are very interesting to be studied as biomedical materials due to its unique physical and chemical properties. The non-stoichiometric properties of CeO2 play a role in the redox/catalytic processes that scavenging free radicals. These properties make CeO2 nanoparticles as being potentially antioxidant and radioprotector materials. In this paper, we report the calcination temperature effect on the antioxidant properties and radioprotective effect of CeO2 nanoparticles synthesized by precipitation method. The CeO2 nanoparticles were synthesized by precipitation method at various calcinations temperatures (300oC – 700oC). The formation of CeO2 nanoparticles and crystallite size was analyzed using X-ray diffractometers. The DPPH method was used to investigate antioxidant properties of CeO2. Dose Enhancement Factor (DEF) of CeO2 nanoparticles were determined by measurement of the absorbed dose of X-ray radiation (Linac 6 MV 200 MU). X-ray diffraction pattern showed formation of cubic fluorite of CeO2 nanoparticles with crystallite size in the range 9 nm-18 nm. Calcination temperature of 500oC resulted in CeO2 nanoparticles with the best antioxidant properties and lowest DEF value. The radioprotection effect of CeO2 nanoparticles was evaluated based on Escherichia coli survival toward X-ray radiation with a dose of 2 Gy. The CeO2 nanoparticles increased Escherichia coli survival of about 24.8% order. These results suggested that CeO2 nanoparticles may potentially be as radioprotector of X-ray Linac 6 MV. Keywords: Antioxidant, CeO2 nanoparticles, Dose Enhancement Factor (DEF), radioprotector

Co-Authors . Istadi Abidin, Nur Ade Ika Susan Affandi Faisal Kurniawan Agus Bashori Agus Subagio Aldilla Lutfia Ali Khumaeni Andi Wibowo Kinandana Andi Wibowo Kinandana Anwar Usman Arkadea Pringgodani, Andra Arnelli Arnelli Bambang Ariwahjoedi Eko Hidayanto Eko Hidayanto Fajar Arianto Fajar Arianto Fatikasari, Tanty Fauzan Musthafa Gunawan Gunawan H Hadiyanto Hella Arofah Heri Sutanto Hernowo, Alfian Holyness Nurdin Singadimedja I. Istadi Isrina Nur Laili Kadarisman Kadarisman Karnaji Karnaji Karnaji, Karnaji Khairurrijal Khairurrijal Kinasih, Diah Ayu Suci Maman Budiman MARIA BINTANG Maryanto - Mikrajudin Abdullah Muhammad Nur Muhammad Nur Mukti, Nursanti Ajune Nasrullah, Faiz Ndaru Adyono Nofi Marlini Nursidi Yunanto Nurul Wahyu Puspaningrum P Priyono, P Pandji Triadyaksa Paramita, Safira Arta Pratama Jujur Wibawa Priyono Priyono Ririn Futikhaningtyas Rukmono, Dito Andi Rulhendri Rulhendri Sari Pratiwi Singgih Wibowo Sukirno Sukirno Sulistia Nurdianik Sumariyah Sumariyah Susanto Haryadi, Eri Syamsul Arifin Syifa Avicenna Tri Windarti Triadiyaksa, Pandji Ummi Kaltsum Very Richardina Very Richardina Wahyu Ambikawati Weni Safitri Widiyanto Widiyanto Yayuk Astuti Yunita Indriyani Zaenal Arifin Zaenul Muhlisin Zaenul Muhlisin

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