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COMBINATION OF COPRECIPITATION AND SONOCHEMICAL METHODS IN SYNTHESIZING SPINEL HAUSMANNITE NANOMATERIAL Hidayat, Nurul; Taufiq, Ahmad; Sunaryono, Sunaryono; Hidayat, Samsul; Heriyanto, Heriyanto; Prayekti, Era Budi
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 8, No 1 (2018)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v8n1.p1-9

Abstract

As it has been widely known that the spectacular characteristics of nanomaterials are strongly dependent on their particle size, crystal structure, and molecular arrangement. The fine structure formation of nanomaterials is inevitable in an attempt of optimizing their promising applications in various fields. One of the notable nanomaterials up to now is hausmannite or Mn3O4. This paper presents a combination of coprecipitation and sonochemical routes in a concurrent way to produce spinel-structured hausmannite nanomaterials. The pH was varied during the synthesis at values of 9, 10, 11, 11.5, and 12. The crystal structure properties were evaluated by X-ray diffractometry (XRD) with the diffraction angle range of 15° - 80°. The functional groups were investigated by Fourier transform infrared (FTIR) spectrometry having wavenumber from 400 to 4000 cm-1. In this study, pH 10 was found to be the best synthesis parameter in producing Mn3O4. Both XRD and FTIR data analyses have agreed on the formation of spinel hausmannite nanomaterials.
PENGARUH STRATEGI PEMBELAJARAN MULTIREPRESENTASI DENGAN PENDEKATAN CONCEPTUAL PROBLEM SOLVING TERHADAP KEMAMPUAN PEMECAHAN MASALAH DAN KEMAMPUAN REPRESENTASI Aha, Leonardus Hendra; Muhardjito, Muhardjito; Sunaryono, Sunaryono
Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan Vol 5, No 1: JANUARI 2020
Publisher : Graduate School of Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/jptpp.v5i1.13128

Abstract

Abstract: The purpose of this study is to look at the problem solving abilities and the representation abilities between students who learn with multi-presentation learning strategies with the conceptual problem solving approach and students who learn with conventional learning. Total sample is 68 students selected using the simple random sampling technique. This study used a quasi experimental method with a pretest-posttest control group design. Data was collected using tests, both before treatment and after treatment. The results of the study were differences in problem solving abilities and representation abilities in both classes. In addition, problem solving abilities and representation abilities of students who learn with multi representation learning strategies with conceptual problem solving approaches are higher than students who learn with conventional learning.Abstrak: Penelitian ini bertujuan untuk mengetahui perbedaan kemampuan pemecahan masalah dan kemampuan representasi antara siswa yang belajar dengan strategi pembelajaran multirepresentasi dengan pendekatan conceptual problem solving dan siswa yang belajar dengan pembelajaran konvensional. Sampel dalam penelitian ini berjumlah 68 siswa yang dipilih dengan teknik simple random sampling. Penelitian ini merupakan penelitian kuantitatif dengan metode eksperimen kuasi. Desain dalam penelitian ini adalah pretest-posttest control group design. Data dikumpulkan dengan menggunakan tes, baik sebelum perlakuan maupun setelah perlakuan. Hasil penelitian terdapat perbedaan kemampuan pemecahan masalah dan kemampuan representasi siswa yang belajar dengan strategi pembelajaran multirepresentasi dengan pendekatan conceptual problem solving dan siswa yang belajar dengan pembelajaran konvensional. Selain itu, kemampuan pemecahan masalah dan kemampuan representasi siswa yang belajar dengan strategi pembelajaran multirepresentasi dengan pendekatan conceptual problem solving lebih tinggi dari siswa yang belajar dengan pembelajaran konvensional.
PENINGKATAN PENGUASAAN KONSEP SISWA SMA TENTANG HUKUM GRAVITASI NEWTON MELALUI MODELING INSTRUCTION Alfianti, Zulfi Farida; Sutopo, Sutopo; Sunaryono, Sunaryono
Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan Vol 4, No 12: DESEMBER 2019
Publisher : Graduate School of Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/jptpp.v4i12.13069

Abstract

Abstract: The purpose of this study was to determine the increase in mastery of student concepts in Newton's Gravity Law material through Modeling Instruction. This research model uses a Mixed Method. The subjects of this research were 60 students in one of the schools in Batu city in grade X Science. Data obtained through statistical analysis of the value of the pretest and posttest. The results of the study show that teaching using Modeling Instruction can increase mastery of concepts by 0.65 with the medium category.Abstrak: Tujuan penelitian ini adalah untuk mengetahui peningkatan penguasaan konsep siswa pada materi Hukum Gravitasi Newton melalui Modeling Instruction. Model penelitian ini menggunakan Mixed Method. Subjek penelitian ini adalah siswa di salah satu sekolah di kota Batu kelas X IPA sebanyak 60 siswa. Data diperoleh melalui analisis statistik nilai pretest dan postest. Hasil penelitian menunjukkan bahwa pengajaran menggunakan Modeling Instruction dapat meningkatkan penguasaan konsep sebesar 0,65 dengan kategori sedang.
Kontribusi Filler Magnetik Fe3O4 pada Efek Histerisis Magneto-Elastisitas Komposit Ferogel Sunaryono, Sunaryono; Taufiq, Ahmad; Nurdin, Nurdin; Darminto, Darminto
Jurnal Fisika dan Aplikasinya Vol 9, No 1 (2013)
Publisher : Jurnal Fisika dan Aplikasinya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (432.724 KB) | DOI: 10.12962/j24604682.v9i1.837

Abstract

Ferogel berbasis partikel Fe3O4 yang diperoleh dari bahan dasar pasir besi Tulungagung telah berhasil difabrikasi. Ferogel merupakan komposit hidrogel (campuran polivinil alkohol dan air) dengan filler partikel magnetit Fe3O4 dalam ukuran mikron dan nano. Hasil analisis difraksi sinar-X menunjukkan bahwa partikel magnetik Fe3O4 ukuran mikron dan nano berturut-turut sesuai dengan pola difraksi Fe3O4 yang memiliki no PDF 11-0626 dan no PDF 03-0863. Sedangkan dari hasil karakterisasi SEM dan TEM ukuran mikron partikel Fe3O4 sekitar 1-10 μm dan ukuran nano partikel Fe3O4 sekitar 11-15 nm. Kontribusi filler magnetik Fe3O4 pada komposit ferogel dapat terlihat pada karakterisasi magneto-elastisitasnya. Ketika ferogel dipengaruhi oleh medan magnetik luar yang berubah terhadap fungsi arus listrik, respon gerak ferogel cenderung membentuk pola histerisis dan menyempit seiring berkurangnya konsentrasi. Ferogel dengan filler partikel mikron Fe3O4 lebih sensitif terhadap pengaruh perubahan medan magnet dibandingkan filler partikel nano Fe3O4. Hal ini disebabkan karena magnet remanen partikel mikron Fe3O4 (8,233 emu/gr) lebih besar dibandingkan partikel nano Fe3O4 (7,995 emu/gr). Respon ferogel dalam kajian penelitian ini dapat dikembangkan untuk mensintesa otot buatan dengan pendekatan eksperimen mulai dari yang mirip penggerak pada robot sampai pada penggerak lunak yang lebih canggih.
Pengaruh Pemanasan pada Struktur Kristal dan Sifat Kemagnetan Fe3O4 dari Pasir Besi Basith, Abd; Taufiq, Achmad; Sunaryono, Sunaryono; Darminto, Darminto
Jurnal Fisika dan Aplikasinya Vol 8, No 2 (2012)
Publisher : Jurnal Fisika dan Aplikasinya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (205.369 KB) | DOI: 10.12962/j24604682.v8i2.869

Abstract

Nano partikel magnetit telah disintesis dari pasir besi dengan menggunakan metode kopresitasi pada temperatur ruang dan dipanaskan. Struktur kristal, ukuran partikel dan sifat kemagnetan dikarakterisasi dengan XRD dan VSM. Hasil dari analisis didapatkan magnetit mengalami transisi fasa dan struktur pada temperatur 500C, parameter kisi bernilai (3,34 - 3,38) ˙A, ukuran partikel magnetite bernilai (11,48 - 13,45) nm dan nilai dari magnetik saturasi untuk sampel dengan temperatur sintering 100C dan 400C berturut-turut adalah 35 emu/g dan 65 emu/g.
Penelitian Komparasi Algoritma Klasifikasi Dalam Menentukan Website Palsu Sunaryono, Sunaryono
Jurnal Teknologi Informasi, Ilmu Komputer dan Manajemen Vol 1 No 1 (2017)
Publisher : LPPM STMIK Widya Utama

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Website counterfeit or phishing website is a crime in the virtual world whose popularity is increasing even in Indonesia until now in 2015. In this study we take on phishing websites dataset from UCI Repository as many as 2546 data by 30 variables used to determine the website is a phising website or not. Having obtained the data, the authors conducted a study to determine the most appropriate algorithms. Determination of the algorithms with comparisons between algorithms classification techniques. Based on some related research and the advantages of the algorithm, the authors took five algorithms to be tested, the algorithm Decission Tree (C4.5), Naive Bayes, KNN, Support Vector Machine and Neural Network. This study using a test of accuracy and AUC as well as different test parametric T-test. In each model, the authors divide the main data into five sections, and on each of the training data validation was done using K-Fold Cross Validation. The results of this study demonstrate that Neural Network algorithm and SVM into the most appropriate algorithm used by the average value of accuracy is 94 and the value AUC 0.9.
Perubahan Model Mental Siswa pada Materi Alat Optik melalui Experiential Learning Arianti, Novi; Yuliati, Lia; Sunaryono, Sunaryono
Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan Vol 3, No 5: MEI 2018
Publisher : Graduate School of Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (650.868 KB) | DOI: 10.17977/jptpp.v3i5.11085

Abstract

Abstract: The central goal of this research was to characterize the mental models of optical instruments expressed by students. The subject of this study were 35 students of class XI in SMA Negeri 1 Badegan. Mixed method embedded experimental model was conducted to probe the participant’s model mental. Data obtained through interviews and tests. The results reveal that the participants held five categories of mental models of optical instrument. The development of student’s model mental indicated by nearly half held a scientifically compatible model mental during and after studying Physics with Experiential Learning. Abstrak: Tujuan penelitian ini adalah untuk mengetahui model mental siswa SMA pada materi alat optik. Subjek penelitian adalah 35 siswa kelas XI SMA Negeri 1 Badegan. Penelitian menggunakan metode Mixed method embedded experimental model. Data diperoleh melalui tes dan wawancara. Hasil penelitian menunjukkan terdapat lima kategori model mental. Perubahan model mental siswa ditunjukkan dengan hampir setengah siswa di dalam kelas memiliki model mental yang sesuai dengan saintifik selama dan setelah pembelajaran Experiential Learning dilakukan.
Investigasi Struktur dan Energi Band Gap Partikel Nano Tio2 Hasil Sintesis Menggunakan Metode Sol-Gel Listanti, Anita; Taufiq, Ahmad; Hidayat, Arif; Sunaryono, Sunaryono
JPSE (Journal of Physical Science and Engineering) Vol 3, No 1 (2018): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (29.573 KB)

Abstract

TiO2 is a semiconductor material that widely applied in various fields due to its superiority both in terms of physical and chemical properties. In this study, the TiO2 nanoparticles was synthesized using sol-gel method. The synthesis of TiO2 nanoparticles was started by reacted TiCl3 with aquades and titrated with ammonium hydroxide and then followed by calcination process at 600 0C for 1.5 hours. The structural characteristics were investigated using XRD. The fungsional groups of the TiO2 nanoparticles were characterized by FTIR. The optical properties of the TiO2 nanoparticles were determined using UV-Vis spectrometer. The morphology of the sample was characterized using SEM. The results show that the TiO2 has structure as anatase phase. The data analysis using the Scherrer’s equation show that the particle crystallite size of is about of 9.77 nm. The energy band gap value of the TiO2 is 3.28 eV. Based on the SEM image, the agglomeration of the sample was formed with the average diameter of particle size of TiO2 is about 92 nm.DOI: http://dx.doi.org/10.17977/um024v3i12018p008
Sintesis Kromium Ferit Dari Pasir Pantai dan Karakterisasi Awal Sensor Suhu Elyani, Widya; Hidayat, Arif; Taufiq, Ahmad; Sunaryono, Sunaryono
JPSE (Journal of Physical Science and Engineering) Vol 3, No 1 (2018): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (28.842 KB)

Abstract

Ferrofluids for temperature sensor application become one of the important modern technology applications. Therefore, the development of the beach sand-based ferrofluids for temperature sensor becomes new and essential things for cutting off their production. In this research, the preliminary investigation of the temperature sensor is developed based on the chromium ferrite ferrofluids. The sample in powder and fluid were prepared by coprecipitation-sonochemical technique.   The powder sample which was characterized by XRD has the crystallite size of 10 nm with high purity. The preliminary investigation shows that the chromium ferrite ferrofluid has a good property as a candidate for temperature sensor application showing a good response on the temperature treatmentDOI: http://dx.doi.org/10.17977/um024v3i12018p001
FABRIKASI HIDROGEL MAGNETIK BERBASIS NANO PARTIKEL FE3O4 Sunaryono, Sunaryono; Munaji, Munaji; Ediati, Ratna; Triwikantoro, Triwikantoro; Darminto, Darminto
Jurnal Sains Materi Indonesia EDISI KHUSUS: OKTOBER 2007
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jusami.2007.0.0.5136

Abstract

FABRIKASI HIDROGEL MAGNETIK BERBASIS NANO PARTIKEL Fe3O4. Telah berhasil difabrikasi hidrogel magnetik dengan menggunakan nano partikel berukuran < 100 nm yang diperoleh dari bahan dasar pasir besi. Untuk membentuk gel digunakan polyvinyl alcohol (PVA) yang dicampur air sebagai media pengikat silang. Respons magnetik dari hidrogel dapat bervariasi bergantung pada kandungan Fe3O4 yang ditambahkan dengan kadar 2,5% massa hingga 15% massa dari massa total gel. Ferogel dapat menyimpang dan mulur karena adanya pengaruh medan magnet. Simpangan dan pemuluran ferogel sebanding dengan besarnya konsentrasi Fe3O4 di dalam pengaruh medan magnet. Sementara itu, wujud fisik gel dibuat dengan kekentalan bervariasi.