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All Journal Jurnal Ilmu Dasar Jurnal Sains Materi Indonesia JFA (Jurnal Fisika dan Aplikasinya) Science and Technology Indonesia International Journal of Science and Applied Science: Conference Series Indonesian Journal of Chemistry SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Jurnal Kreativitas PKM JIEMS (Journal of Industrial Engineering and Management Systems) Jurnal Fisika : Fisika Sains dan Aplikasinya Jurnal Teori dan Aplikasi Fisika JASIEK (Jurnal Aplikasi Sains, Informasi, Elektronika dan Komputer) Jurnal Fisika Indonesia Jurnal Pengabdian Masyarakat Khatulistiwa Journal of Energy, Material, and Instrumentation Technology NEAR: Jurnal Pengabdian kepada Masyarakat Jurnal Kemitraan Masyarakat

Posman Manurung

Departement Of Physics, Faculty Of Mathematic And Natural Science, University Of Lampung

Author-ID : 314687

Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

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THE INFLUENCE OF ELECTRICAL VOLTAGE ON FORMATION OF SILICA NANO FIBER WITH ELECTROSPINNING METHOD Erika Sempana Ginting; Posman Manurung; Yanti Yulianti
Jurnal Teori dan Aplikasi Fisika Vol 10, No 1 (2022): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v10i1.2907

Silica nanofibers have been successfully fabricated using electrospinning method. Silica solution was prepared with molar rasio of tetraethyl orthosilicate (TEOS): ethanol: aquabides:hydrogen chloride (HCl) of 1 : 10 : 3 : 0.04. Polyvinyl alcohol (PVA) of 10% was added to solution. The solutions were then mixed with a ratio of silica: PVA solution of 2: 3 ml. The functional group of silica/PVA was characterized by Fourier transform Infrared Spectroscopy (FTIR). Morphology and elements analysis was tested by Scanning Electron Microscopy - Energy Dispersive Spectroscopy (SEM - EDS). The functional groups of silica/PVA solution formed are –OH, C-H, CH2, C=O, Si-O, and Si-O-Si which indicate the occurrence of cross-linking between silica and PVA. The functional groups shown in the solution are still visible on the silica nanofibers in the presence of C, O, and Si elements in the EDS results of the nanosilica fibers. The surface morphology shows that the silica nanofibers are more continuous and the beads are relatively less with increasing electrospinning voltage. The average fiber diameter by taking into account the estimated standard deviation, shows a graph with a linear trend and increasing the applied electrospinning voltage. Silica nanofibers with diameter range (80-150) nm are obtained

Pengaruh Perlakuan Termal Terhadap Karakteristik Aspal Komposit Berbasis Silika Sekam Padi Nita Susanti; Juniati Br Simbolon; Simon Sembiring; Posman Manurung
Jurnal Teori dan Aplikasi Fisika Vol 8, No 1 (2020): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v8i1.2452

Synthesis and characterization of asphalt has been modified with silica rice husk with temperature variations of 200, 250, and 300oC. Silica is obtained from rice husk using the sol gel method. Furthermore asphalt and silica are solidified at 110oC. The experiment was conducted to determine the effect of temperature on the microstructure, structure, and functional groups of modified asphalt. SEM analysis shows asphalt modification with a temperature of 300oC in the form of different clumps. XRD analysis showed the phase formed from each temperature was an amorphous phase. The result of the FTIR analysis showed that the functional groups seen in the modified asphalt samples were Si-OH, Si-O-Si, Si-O, and C-H. The compressive strength carried out showed the strength of asphalt again cracks became stronger as the temperature increased.

Pengaruh Variasi H2SO4 Pada Pembentukan Nanosilika Berbasis Batu Apung Riska Trisna Nuraini; Posman Manurung; Suprihatin Suprihatin
Jurnal Teori dan Aplikasi Fisika Vol 7, No 2 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i2.1954

Nanosilica was extracted by using NaOH, H2SO4 and HCl. The amounth of NaOH and HCl are 3,0 M and 1,0 M respectively. The titration using H2SO4 was varied of 4,0 M; 4,5 M; 5,0 M; 5,5 M; 6,0 M. The pumice powder was calcined for 4 hours at 500 ºC and the nanosilica powder was calcined for 5,5 hours at 800 ºC. The results of X-Ray Flouresence (XRF) showed nanosilica with the highest purity in variation of H2SO4 5,0 M at 95,32%. The results of the X-Ray Diffractometer (XRD) showed that pumice consistent the anorthite and albite phase. The variation of H2SO4 5,0 M produced an amorphous phase. The results of Transmission Electron Microscopy (TEM) show nanosilica particle size with variations of H2SO4 5,0 M in the range 4,8-11,3 nm with an average (7,62 ± 2,15) nm.

Pengaruh Laju Penginjeksian Doping Sulfur terhadap Aktivitas Fotokatalis Nanotitania Menggunakan Metode Sol Gel Delfi Oktavia Amrani; Posman Manurung; Pulung Karo Karo
Jurnal Teori dan Aplikasi Fisika Vol 7, No 2 (2019): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v7i2.2246

Abstract. Synthesis of sulfur doped titania (S-TiO2) was carried out through sol-gel method. Titanium isopropoxide (TTIP), tween-80, isopropanol and sulfuric acid (H2SO4) as a source of sulfur doping were used as raw material. The aimed of this research is to study the effect of the rate of sulfur doping injection by using an injection pump toward S-TiO2 photocatalyst activity. Four sulfur doping samples were prepared with rate injection of 4 ml/30; 4 ml/60; 4 ml/90 and 4 ml/120 minutes respectively. Titania powder was calcined at temperatur of 450 oC for 5 hours. The sintered samples were tested for photodegradation of remazol yellow under UV irradiation. Physical characteristics were analyzed using transmission electron microscopy (TEM) and UV-Vis Spectrophotometer. The result of the UV-Vis spectrophotometer showed that sample with an injection rate of 4 ml/30 minutes showed higer photocatalyst activity with the particle size is (7,1 nm ± 1,9 nm)

Pengaruh Titania yang Didoping Sulfur terhadap Ukuran Partikel Siti Fadilah; Posman Manurung; Ediman Ginting Suka
Jurnal Teori dan Aplikasi Fisika Vol 4, No 1 (2016): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v4i1.1315

Penelitian ini dilakukan untuk mempelajari pengaruh titania (TiO2) yang didoping sulfur terhadap ukuran butiran partikel. Titania disintesis dengan metode sol gel dan kemudian dikalsinasi pada 400 oC. Titania yang didoping sulfur (S-TiO2) dibuat dengan komposisi tween-80 4 gr; isopropanol 40,15 mL; titanium isopropoksida 3,4 ml dengan variasi H2SO4 0 ml untuk TiO2 dan 5 ml untuk S-TiO2. Hasil analisis TEM menunjukkan ukuran butiran partikel titania tanpa dan doping sulfur masing-masing adalah sekitar (13,14 ± 0,67) nm dan (10,14 ± 0,52) nm.

MODELING INFILTRATION KINETICS OF LIQUIDS INTO POROUS ALUMINA PREFORMS Posman Manurung; It Meng Low; Craig Buckley
Jurnal Sains Materi Indonesia Vol 7, No 2: FEBRUARI 2006
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

MODELING INFILTRATION KINETICS OF LIQUIDS INTO POROUS ALUMINA PREFORMS. Alpha-alumina preform was infiltrated with different infiltrant and pressure for studying the infiltration kinetic. Effects of pre-sintering temperature, type of infiltrant, pressure and multiple infiltrations on the rate of infiltration into porous alumina preforms were described. The pore radius of alumina preform is calculated based on the preform water system by using Washburn model. The pore radius from this model, r of 0.0147 μm is good agreement to the average pore radius found by using mercury porosity measurement, r of 0.0170 μm. The pore radius of 0.0147 μm is used to calculate the rate of infiltration, k. The k factors are 64.83 x 10-5 ms½ and 27.11 x 10-5 ms½ for water and TiCl3 respectively without involving pressure in the calculation. On the other hand, by using pressure, the k factors are 75.14 x 10-5 ms½ and 31.40 x 10-5 ms½ for water and TiCl3 respectively. Other formulas were also included as comparisons. The kinetic of water and titanium trichloride alumina preform system is parabolic in time or linier in square root of time.

Synthesis and characterization of TiO2 from Lampung’s Iron Sand using Leaching Method with Temperature Variation Iqbal Firdaus; Anggi Stevani; Yudhistira Novita Handayani; Nadia Febriyanti; Roniyus Marjunus; Posman Manurung
Jurnal Fisika dan Aplikasinya Vol 17, No 2 (2021)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i2.7921

Ilmenite is a natural material in the form of sand which contains heavy metal minerals that are very abundant in Lampung province. This research aims to determine the content of TiO2 from Lampungs iron sand by leaching method with temperature variation. The iron sand are mixed with sodium hydrogen carbonate (NaHCO3), then heated at 700◦C for an hour. This research uses 5 samples with leaching temperature variation of 70, 80, 90, 100, and 110◦C for 2 hours. The acid leaching process uses HCl 12 M with a ratio of iron sand and HCl of 1:4, while the water leaching process uses 50 ml of distilled water. Furthermore, the samples are characterized using XRD and XRF to determine TiO2 content in the iron sand. The result shows that the highest amount of TiO2 is obtained in the sample with the leaching temperature of 110◦C for 2 hours, which is approximately 61%.

X-Ray Diffraction and Microstructure of Tin Dioxide with Addition of Fe Posman Manurung
Jurnal ILMU DASAR Vol 12 No 1 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1455.828 KB)

Preparation and characterization of tin dioxide, SnO2, had been carried out by precipitation process of SnCl2.2H2O in ammonia and aqua solutions with comparison of 1 : 7. FeCl3 was added to solution with variation of 0, 0,1, 0.2, 0.5 and 1.0 gram respectively and then sintered at 900°C. The X-ray diffraction (XRD) analysis shows that the intensity of diffraction increases with the addition of Fe. The addition of Fe does not cause the new phase. Generally, the Bragg angle is relative same for all samples that means Fe does not change significantly the cell parameters. Scanning electron microscopy (SEM) image shows the microstructure changed with the addition of Fe. On the small addition, the microstructure tends to oval and on the larger addition to plateau.

Student Worksheet Static Fluid Material Based on Scientific Approach Using Giuded Inquiry Model Supardi Supardi; Chandra Ertikanto; Posman Manurung
International Journal of Science and Applied Science: Conference Series Vol 2, No 1 (2018): International Journal of Science and Applied Science: Conference Series
Publisher : Universitas Sebelas Maret

This Research and development goal is to produce Student Worksheet (SWS) static fluid material based on the scientific approach using guided inquiry learning model, which is easy, interesting, useful and effective. This research was conducted through seven stages, namely: pra-research and data collection stage, planning stage, pra-developing product stage, pra-test stage, revising design stage, product test stage, and revising product stage. The pra-study stage consists of a literature study and teacher and student assessment analysis in Al Kautsar Bandar Lampung high school. The developing stage is produces (SWS) static fluid material with scientific approaches based using guided inquiry learning model with well validated of design expert and well enough of the material expert. The product test stage had been held on the sample with random cluster sampling technique which XI.IPA-5 class as the experimental class and XI.IPA-4 class as the control class. The results of this study indicate that the developing result SWS s has the easy category, interesting, useful, and good enough effective with the N-gain 0.599.

Implementation of student’s worksheet based on project based learning (pjbl) to foster student’s creativity Sahtoni Sahtoni; Agus Suyatna; Posman Manurung
International Journal of Science and Applied Science: Conference Series Vol 2, No 1 (2018): International Journal of Science and Applied Science: Conference Series
Publisher : Universitas Sebelas Maret

This study aimed to foster student creativity through the use of student worksheet based on Project Base Learning (PjBL) on dynamic electrical material in making alternative power sources. The research method is using a pre-experimental design with One-Shot case study type. The study population was students of class IX MTs Al-Islah in Pesawaran Lampung. A sample of one class consisting of 30 people was obtained by purposive sumpling. Data analysis was done by using descriptive concerning creativity, product, and response of students to see effectiveness of learning. The results showed that the application of student worksheet based on project based learning is overall effective to foster creativity of student. Based on the average of student’s creativity, the result is 80% which categorized as “creative.” Based on the average of student’s product, the result is 76.2% which categorized as “valuable.” The student’s response is positive as much as 92% which categorized as “very agree.”

Co-Authors Abdurrahman, Ahmad Faruq Agnesia, Donna Agus Riyanto Agus Riyanto Agus Riyanto Agus Riyanto Agus Suyatna Ahmad Rosadi Alfin Edo Kaisar Lubis Amir Supriyanto Anggi Puspita Dewi Anggi Stevani Anggraini, Adeliya Ayu Anggraini, Anisyah Aprilia, Ayu Arya R. Syah Ayu Aprilia Benyamin, Chairunissa A Chandra Ertikanto Craig Buckley Delfi Oktavia Amrani Della M. Andini Dita Rahmayanti Dwi Asmi Ediman Ginting Ediman Ginting Ediman Ginting Suka Erika Sempana Ginting Fajar Nurjaman Faradilla Syani Fath, Yusril Al Fatia Ulfah Fegi Liani Firdaus, Iqbal Futichah Futichah Gregorius N. Susanto Gultom, Rysa Sonya Reni Paulin Hasni Handayani Imaniar Romaeni Indra Pardede Iqbal Firdaus It Meng Low Jayanti Pusvitasari Johar Sitohang Junaidi - Junaidi Junaidi Junaidi Junaidi Junaidi Junaidi Juniati Br Simbolon Karo Karo, Pulung Karo, Pulung Karo Ketut Putra Wijaya Lady Permatasari Lusi Vusfita Sari Maharani, Renita Marjunus, Ronius Marjunus, Roniyus Mega Pertiwi, Mega Mey Puji Astuti Miranti Syafitri Mitra Septanto Nabilah Rafidiyah Nadia Febriyanti Nita Susanti Nola Fricilia Nurcahayaniati, Hikmah Nurqori Setiawati Pauzi, Gurum Ahmad Pertiwi, Salwa Dian Prihanto, Surya Pulung Karo-Karo Putri, Faradilla Nabila R. Supryanto Rahayu, Sri Rahma Fauza Rahmayanti, Dita Renita Maharani Fauzi Rika Rahayu Riska Trisna Nuraini Riyanto, Agus Rizki Amalia Rudy Situmeang Rudy Situmeang Rudy T M Situmeang S Suprihatin Sahtoni Sahtoni Sari, Tria Permata Sembiring, Simon Sempana, Erika Shabrina, Shabrina Yakosati Simon Sembiring Simon Sembiring Simon Sembiring Simon Sembiring Siti Fadilah Sitohang, Rosanti sri wahyu suciayti Sri Wahyu Suciyati Sri Wahyu Suciyati Sukma Wibowo Sumardi . Sumardi, Sumardi Sumiyati Sumiyati Supardi Supardi Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Supriyanto, Amir Syafriadi Syafriadi Syafriadi Syafriadi Trianasari, Trianasari Vega Rahmawati Ar Vidi Nurhidayah Wasinton Simanjuntak Windhini Anggraeni Yanti Yulianti Yanti Yulianti Yanti Yulianti Yanti Yulianti Yanti Yulianti Yanti Yulianti Yuant Tiandho Yudhistira Novita Handayani Yunita Yunita Zaharani, Rethanita Zahra Maria Ulfa

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