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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
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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Journal : YOUNGSTER PHYSICS JOURNAL

 1 
SENSITIVITAS LARUTAN NANOPARTIKEL CeO2 TERHADAP RADIASI SINAR GAMMA TELETERAPI COBALT-60 Agus Bashori; Iis Nurhasanah; Zaenal Arifin
Youngster Physics Journal Vol 5, No 4 (2016): Youngster Physics Journal Oktober 2016
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Gamma rays are ionizing radiation that are useful to kill cancer cells through radiation therapy, but radiation would be dangerous if the user escapes scrutiny. In this case the required dosimeter to detect its existence. Practically daily dose allowed for radiotherapy ranges from 1.8 Gy to 2 Gy therefore needed dosimeter capable of detecting a range of doses. This study has been conducted testing sensitivity to gamma radiation to a solution of CeO2 nanoparticles, each of which is synthesized at a temperature of 400°C with a concentration of 2.5 x 10-4 g / ml. CeO2 nanoparticle solution is then analyzed using a UV-Vis spectrophotometer before and after irradiated. Gamma radiation with an energy of 1.33 MV administered at doses varying from 1 Gy to 3 Gy. The test results in the form of UV-Vis absorbance spectrum CeO2 nanoparticle solution which is used as a reference to determine changes in absorbance (ΔA) and value-G. Absorbance spectrum showed absorbance increased to dosing and a strong absorbance occurs at a wavelength of 297 nm for a solution of CeO2 nanoparticles were synthesized at a temperature of 400°C. Sensitivity solution CeO2 nanoparticles seen from the changes absrobansi and value-G. Gamma radiation dosing provide value change in absorbance of about 1.50 x 10-2 to 2.50 x 10-2 and values around 0.095 molJ-1 to 0,439 molJ-1 to a solution of CeO2 nanoparticles were synthesized at a temperature of 400°C.  These values indicate that the solution of CeO2 nanoparticles have a sensitivity to gamma radiation.
STUDI PENGAPLIKASIAN EFEK FOTOKATALIS DARI LAPISAN ZnO:Ag TERHADAP DEGRADASI BAKTERI E.coli Ndaru Adyono; Heri Sutanto; Iis Nurhasanah
Youngster Physics Journal Vol 4, No 3 (2015): Youngster Physics Journal Juli 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Research in the field of green technology using photocatalyst materials can be a solution to environmental pollution, especially contamination of aquatic bacteria. These materials absorb energy from the sun and form hydroxyl radicals that kill bacteria. Zinc oxide has a high photocatalytic efficiency with Eg 3.3 eV in the range of UV - visible light. ZnO can be modified by addition of silver in order to improve the effectiveness as well as anti-bacterial properties. ZnO:Ag 4% layers prepared with thermal spray coating method with deposition temperature at 250ºC and aneling temperature at 450 ºC. XRD measurements performed with CuKα radiation with wavelength at 1.54060 Å and the diffraction angle in range 20 ° - 70 °. The diffraction patterns were identified using the Crystallography Open Database (COD) and software QUALX. ZnO (Id 101-1259) phase and metal Ag (Id 151-2487) phase has formed, but there are also silver oxide phase AgO (Id 150-9488) and Ag2O (Id 150-9684). Crystallite size has been calculated using Debye-Scherrer equation resulted an average value 43.46 nm. The optical properties were measured using a UV-Vis spectrometer in the wavelength range 250-800 nm. Transmittance spectrum were converted into an absorbance spectrum using the Beer-Lambert law. Eg value were analyzed with methods tauc's plot. Linear extrapolation (αhν)2 against hν provide direct transition Eg value 3.1 eV. Photodegradation ability of ZnO:Ag layer performed on E.coli bacteria. TPC measurement results were analyzed using the degradation rate graph, Ct (bacteria concentration) against time exposure. The degradation rate values obtained 1.554 x 10-17 (cfu/ml)-2(minutes)-1.Keywords : ZnO:Ag, band gap energy, XRD, Uv-Vis, TPC, degradation rate.
ANALISIS MIKROSTRUKTUR NANOPARTIKEL CeO2 DIDOPING Zn YANG DISINTESIS MENGGUNAKAN METODE PRESIPITASI Ririn Futikhaningtyas; Nurul Wahyu Puspaningrum; Iis Nurhasanah
Youngster Physics Journal Vol 2, No 2 (2013): Youngster Physics Journal April 2013
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Zn-doped CeO2 nanoparticles with various Zn content of 0 - 20% have been synthesized by using precipitation method in the solvent mixture of aquades and isopropanol at room temperature.  The precipitant was calcinated at temperatur 300oC for 3 hours.  The structural properties of CeO2 nanoparticles were characterized by using x-ray diffraction.  X-ray diffraction pattern was analyzed to investigate the influence of Zn doping on crystalite size, lattice constant and lattice strain of CeO2 nanoparticle.  Observation to the peaks diffraction indicate that all of the CeO2 nanoparticle with various Zn doping have cubic fluorite structure and lattice constants in the range 5,4155 Å – 5,4254 Å.  The crystallite sizes of 6 – 11 nm were obtained by Williamson-Hall plot method.  Incorporation of Zn to the CeO2 nanoparticle decrease the crystallite size.  The crystallite size of Zn-doped CeO2 nanoparticles is depend on Zn%. Keywords: CeO2, nanoparticle, precipitation, lattice constant, x-ray diffraction
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