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All Journal Jurnal Spektra PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL)
R. Farma, R.
Jurusan Fisika, Universitas Riau, Simpang Baru, Pekanbaru
Electrical & Electronics Engineering Energy Physics Other

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PENGARUH VARIASI PENAMBAHAN ASAM PADA LARUTAN PENUMBUH UNTUK MENGHASILKAN PARTIKEL MnO2 Taer, Erman; Sarah, D.N.; Farma, R.; Taslim, R.
Jurnal Spektra Vol 16, No 3 (2015): Spektra: Jurnal Fisika dan Aplikasinya
Publisher : Jurnal Spektra

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AbstrakPenumbuhan Mangan Oksida (MnO2) menggunakan penambahan asam sulfat (H2SO4) dan asam nitrat (HNO3) pada larutan penumbuh KMnO4 di atas substrat karbon kayu karet telah berhasil dilakukan. Perbedaan penambahan kedua jenis asam pada larutan penumbuh menyebabkan perbedaan waktu penumbuhan. Warna larutan asal KMnO4 yang berwarna ungu perlahan-lahan berubah menuju warna cokelat yang stabil. Waktu penumbuhan larutan H2SO4 adalah 30 menit sedangkan untuk penambahan larutan HNO3 dengan waktu 120 menit. Scanning electron microscope, energi dispersif sinar-X dan difraksi sinar-X merupakan metode yang digunakan untuk melihat morfologi dan bentuk partikel, kandungan unsur dan derajat kristalin dari partikel  MnO2 yang dihasilkan. Partikel MnO2 yang dihasilkan menggunakan H2SO4 berbentuk pipih datar sedangkan bentuk partikel MnO2 yang dihasilkan menggunakan HNO3 adalah berbentuk bulat. Kandungan MnO2 yang terkandung pada sampel HNO3 lebih banyak dibandingkan pada sampel H2SO4. Keberadaan MnO2 ditunjukkan dengan adanya tambahan puncak pada sudut 2θ = 21,3770 dan 55,70.Kata Kunci : Subsrat Karbon Kayu Karet, Asam Sulfat, Asam Nitrat dan Mangan Oxida Abstract The growthing of Manganis Oxide (MnO2) using addition of sulfuric acid (H2SO4) and nitric acid (HNO3) in a solution of KMnO4 at surface of carbon substrate from rubber wood has been successfully carried out. Growth in the addition of two types of acid in the solution growth cause difference in growth time. Colored of origin KMnO4 was a violet and slowly changing towards a stable brown color. Time changes color from violet to brown is chosen as a time of growth. Growt time for addition of H2SO4 solution is 30 minutes while for the addition of HNO3 solution is 120 minutes. Scanning electron microscope, energy dispersive X-ray and X-ray diffraction method used to study the morphology and particle shape, element content and degree of crystalline of MnO2 particle wave produced. MnO2 particles produced using H2SO4 in shape of flattened while MnO2 particle from produced using HNO3 is spherical. The MnO2 content of the samples HNO3 contained more than the H2SO4 samples. The existence of MnO2 show by an additional peak at angle 2θ = 21,3770 and 55,70.Keywords : carbon substrate rubber wood, sulfuric acid, nitric acid and manganis oxide
KARAKTERISASI PARTIKEL PRA-KARBON DARI BUNGA RUMPUT GAJAH (PENNISETUM POLYSTACHYON) DENGAN CAMPURAN SURFAKTAN ANIONIK SODIUM DODESIL SULFAT SEBAGAI BAHAN DASAR SUPERKAPASITOR E. Taer; H. Halim; R. Farma; R. Taslim
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 4 (2015): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2015
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

A research on the manufacture of pre-carbonized particles (PCP) in nano-meter size from elephant grass flower has been studied. The process of making (PCP) using a combination of ballmilling methods and the addition of the anionic surfactant sodium dodecyl sulfate and followed by chemical activation using KOH. Pre-carbonization processes carried out at a temperature of 280 °C and then followed by milling and sieving process to obtain the particle size smaller than 38 μm. The next stages of the sample (PCP) is mixed with a two concentrations of surfactant are 0.5 M and 1.5 M. The final stages to produce the (PCP) using a process of ballmilling with milling time of 80 hours and was closed by chemical activation using KOH activator with a concentration of 0.7 M. Scanning Electron Microscope (SEM) images showed the (PCP) in the particle size range of 100 - 200 nm. Analysis with energy dispersiv X-rays showed the carbon contentin in the sample of 52%. Results of X-ray data diffraction found that the carbon peak at 2θ angles, namely 26,2690 and 45,3470 that describes the elements carbon with a crystal orientation (002) and (100). Keywords:Elephant Grass, surfactants, Ballmilling, Partikel Pre-carbon.
KARAKTERISASI SIFAT FISIKA KARBON AKTIF TEMPURUNG KELAPA DENGAN VARIASI KONSENTRASI AKTIVATOR SEBAGAI KONTROL KELEMBABAN E. Taer; T. Oktaviani; R. Taslim; R. Farma
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 4 (2015): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2015
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

Has successfully carried out a study of the effect of different concentrations of KOH activator in coconut shell charcoal as a humidity control. KOH concentration on the activation process of coconut shell charcoal varied as much as 1 M, 2 M and 3 M. The activation process is done for two hours at room temperature. The activated carbon is washed using distilled water until the pH of the washing water became neutral and then followed by drying for 24 hours at a temperature of 100ËšC. Physical properties was studiod suchasi, surface morphology, element content and degree of cristalinity using a Scanning Electron Microscope, Energy Dispersive X-Ray and X-Ray Diffraction instrumen. Coconut shell activated carbon used as the coating material for tosting chamber. The study of humidity charavationtic with time priode of 15 minutes for 2 hours. Humidity value at the end of 2 hours of testing for concentration of carbon with 1, 2 and 3 M KOH is 89%, 88% and 85% respectively. This study shows the activation of KOH concentration depending on coconut shell carbon effect on humidity test chamber. Keywords: coconut shell, potassium hydroxide, Humidity.
Co-Authors D.N. Sarah D.N. Sarah, D.N. E. Taer Erman Taer H. Halim R. Taslim R. Taslim R. Taslim R. Taslim, R. T. Oktaviani