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All Journal HAYATI Journal of Biosciences VALENSI Cakrawala Pendidikan Jurnal Kependidikan: Penelitian Inovasi Pembelajaran JPMS (Jurnal Pendidikan Matematika dan Sains) Jurnal Penelitian dan Evaluasi Pendidikan JOURNAL OF EDUCATION Jurnal Penelitian Saintek CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) CHEMISTRY PROGRESS Jurnal Pendidikan Kimia Indonesia Jurnal Sains Dasar Jurnal Pendidikan Indonesia Jurnal Matematika & Sains Journal of Mathematical and Fundamental Sciences Alchemy Jurnal Penelitian Kimia TREUBIA BERITA BIOLOGI JURNAL BIOLOGI INDONESIA ZOO INDONESIA Jurnal Penelitian Pendidikan IPA (JPPIPA) ALCHEMY Jurnal Penelitian Kimia Jurnal Pendidikan Kimia (JPKim) Indonesian Journal of Chemistry Formatif: Jurnal Ilmiah Pendidikan MIPA Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Molekul: Jurnal Ilmiah Kimia Jurnal Entomologi Indonesia Kumawula: Jurnal Pengabdian Kepada Masyarakat BIO-EDU: Jurnal Pendidikan Biologi Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Journal of Innovation in Educational and Cultural Research Zoo Indonesia INSECTA: Integrative Science Education and Teaching Activity Journal Makara Journal of Science UNESA Journal of Chemical Education Jurnal Pengabdian dan Pemberdayaan Masyarakat Indonesia AMMA : Jurnal Pengabdian Masyarakat Jurnal Elemen Kimia Jurnal Riset Pembelajaran Kimia Indonesian Journal on Learning and Advanced Education (IJOLAE)

Hari Sutrisno

Universitas Negeri Yogyakarta

Author-ID : 275686

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

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Modifikasi Sifat Elektronik Material Perovskit NaYTiO4 oleh Variasi Konsentrasi Dopan Lantanum dengan Metode Density Functional Theory Wisanggeni Bayu Aji; Hari Sutrisno
ALCHEMY Jurnal Penelitian Kimia Vol 18, No 1 (2022): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.18.1.53333.80-94

Energi celah pita dan density of state (DOS) dari NaY(1-x)LaxTiO4 (x = 0; 0,25; 0,50 dan 0,75) dapat diprediksi secara teoritis menggunakan pendekatan density functional theory (DFT). Perhitungan awal berdasarkan atas pendekatan local density approximation (LDA) dan generalized gradient approximation dari Perdew-Burke-Ernzerhof (GGA+PBE) sebagai fungsional tukar-korelasi. Perhitungan awal energi celah pita dan DOS dilakukan pada unit sel konvensional (1×1×1) untuk NaYTiO4 dan supersel (2×2×1) untuk NaY(1-x)LaxTiO4 (x = 0,25; 0,50 dan 0,75) dengan program CASTEP Materials Studio. Hasil perhitungan menunjukkan energi celah pita (Eg) sebesar 3,447; 3,384; 3,356 dan 3,560 eV untuk x = 0; 0,25; 0,50 dan 0,75 dengan metode LDA. Di sisi lain, metode GGA+PBE menunjukkan Eg sebesar 3,039; 2,963 dan 2,930 eV untuk x = 0; 0,25; 0,50 dan 0,75. Hasil perhitungan karakter DOS menunjukkan bahwa seluruh material menunjukkan transisi Eg tersebut dikontribusi oleh transisi elektron antara pita valensi O 2p dan konduksi Ti 3d. Susbtitusi atom La pada posisi atom Y tidak menghasilkan pita di tengah Eg (intermediate band) melainkan hanya memperlebar atau mempersempit celah pita pada NaY(1-x)LaxTiO4 akibat distorsi panjang ikatan Ti‒O. Penelitian ini menunjukkan peran signifikan dari La terhadap sifat elektronik material NaY(1-x)LaxTiO4 untuk aplikasi pada sel surya di masa depan. Modification of Electronic Properties of NaYTiO4 Perovskite Material by Variation of Lanthanum Dopants Concentration using Density Functional Theory Method. Bandgap energy and density of state (DOS) of NaY(1-x)LaxTiO4 (x = 0; 0.25; 0.50 and 0.75) can be predicted theoretically using density functional theory (DFT) approach. The initial calculation is based on the local density approximation (LDA) and generalized gradient approximation of Perdew-Burke-Ernzerhof (GGA+PBE) as exchange-correlation functional. Initial calculations of bandgap energy and DOS were performed on conventional unit cells (1×1×1) for NaYTiO4 and supercells (2×2×1) for NaY(1-x)LaxTiO4 (x = 0.25; 0.50 and 0.75) with the CASTEP Materials Studio program. The calculation results show the bandgap energy (Eg) of 3.447; 3.384; 3.356 and 3.560 eV for x = 0; 0.25; 0.50 and 0.75 with the LDA method. On the other hand, the GGA+PBE method shows an Eg of 3.039; 2.963 and 2.930 eV for x = 0; 0.25; 0.50 and 0.75. DOS character calculation results show that all materials exhibit the Eg transition, which is contributed by the electron transition between the O 2p valence band and Ti 3d conduction band. The substitution of La atoms at the Y atomic position does not produce a band in the middle of Eg (intermediate band) but only widens or narrows the bandgap in NaY(1-x)LaxTiO4 due to distortion of the Ti‒O bond length. This study demonstrates the significant role of La on the electronic properties of NaY(1-x)LaxTiO4 materials for future solar cell applications.

A PRELIMINARY STUDY ON MACRO-MOTH DIVERSITY AT THE BASE OF FOJA MOUNTAIN NATURE RESERVE: KWERBA VILLAGE, MEMBRAMO RAYA, PAPUA Hari Sutrisno
ZOO INDONESIA Vol 21, No 1 (2012): Juli 2012
Publisher : Masyarakat Zoologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52508/zi.v21i1.2350

Kajian awal ngengat berukuran besar telah dilakukan di desa Kwerba, Kaki Pegunungan Foja, Membramo Raya tanggal 1 sd. 29 November 2008 (10 malam). Tujuan dari kajian ini adalah untuk mengumpulkan informasi tentang keragaman ngengat dan juga untuk mengetahui komposisi jenis ngengat di kawasan ini. Hasil penelitian menunjukan bahwa dalam waktu yang singkat hanya diperoleh sekitar 83% dari total yang ada atau sekitar 178 dari total perkiraan 214 jenis. Indeks diversitas Fisher’s ? relatif rendah yaitu 83,17. Demikian juga jumlah famili yang ditemukan di kawasan ini juga rendah hanya 19 famili atau sekitar 1/3 dari total famili yang ada di Indo-Malaya. Secara umum, Pyralidae, Geometridae, dan Noctuidae mendominasi kawasan tersebut. Rendahnya diversitas di kawasan ini berhubungan dengan jenis tanaman yang ada. Pembukaan lahan dan pembalakan liar telah menyebabkan turunnya jumlah jenis pohon tetapi di sisi yang lain kerapatan tumbuhan muda dan jumlah tumbuhhan merambat meningkat. Hanya terdapat sekitar 300 species tumbuhan dikawasan ini. Tentu saja kalau menuju ketinggian yang lebih tinggi dari kawasan kaki gunung ini kemungkinan jenisnya tumbuhan akan lebih banyak karena lebih jauh dari jangkauan penduduk. Sehingga diversitas ngengat di kawasan ini belum dapat digunakan untuk menyimpulkan keragaman ngengat di Pegunungan Foja. Kajian yang lebih intensif yang meliputi seluruh lokasi pegunungan dari dataran rendah sampai puncak masih perlu dilakukan.

POLYMORPHIC TRANSFORMATION OF TITANIUM DIOXIDE CAUSED BY HEAT TREATMENT OF PROTONIC LEPIDOCROCITE TITANATE Hari Sutrisno; Sunarto Sunarto
Indonesian Journal of Chemistry Vol 10, No 2 (2010)
Publisher : Universitas Gadjah Mada

The polymorphic phases of titanium dioxide were successfully prepared by heat treatments of protonic lepidocrocite titanate, H0.54Ti1.8650.135O4·0.5H2O at various temperatures. The prepared powders were characterized with EDX (Energy Dispersive X-ray), Scanning Electron Microscopy (SEM), X-rays Diffractometer (XRD), Raman Spectroscopy, and High Resolution Transmission Electron Microscopy (HRTEM). The effect of calcination temperature on the phase structure and morphology of the heated samples was investigated. The research indicated that the protonic titanate, H0.54Ti1.8650.135O4·0.5H2O ( = vacancy), lost the interlayer water by being heated up to 200 °C to produce a dehydrated phase, H0.54Ti1.8650.135O4. Above 300 °C, the dehydrated phase, H0.54Ti1.8650.135O4, completely transformed to TiO2(B) and anatase was obtained as pure phase at 600 °C. The phase transformed as the following process: H0.54Ti1.8650.135O4·0.5H2O ® H0.54Ti1.8650.135O4·0.25H2 ® H0.54Ti1.8650.135O4 ® TiO2(B) ® TiO2-anatase.

PILLARIZATION OF LAYERED TETRATITANATES ANION BY ZIRCONIUM(IV) POLYCATION SPECIES Hari Sutrisno; Endang Dwi Siswani
Indonesian Journal of Chemistry Vol 9, No 3 (2009)
Publisher : Universitas Gadjah Mada

Pillaring layered tetratitanates anion by zirkonium(IV) polycation species has been realized by three steps: 1). cation-exchange of potasium tetratitanates, 2). intercalation of n-butylamine compound in layered hydrogen tetratitanates and 3). intercalation of zirconium(IV) polycation species by mixing butylamine-intercalated tetratitanates with an aqueous solution of ZrOCl2.8H2O at pH various: 0.1, 0.9 and 1.8. The procedure was carried out by Chimie Douce method. The structures of titanates and the products which had undergone H+ exchange and intercalated by n-butylamine and zirkonium(IV) polycation spesies were investigated by X-rays Diffractometer (XRD) and X-rays Fluorescence (XRF). It was found in the research that [Zr(H2O)8]4+, [Zr(OH)(H2O)7]3+ or [Zr(OH)2(H2O)6]2+ types have presented in the interlayer of the products. At pH = 0.1 and 0.9, [Zr(OH)(H2O)7]3+ type was pillared more dominated in layered tetratitanates than [Zr(H2O)8]4+ type. At pH 1.8, it was signaled that [Zr(OH)(H2O)7]3+ and [Zr(OH)2(H2O)6]2+ types intercalated in layered tetratitanates.

OLIGOMERIC CHROMIUM(III) POLICATION SPECIES-PILLARED LAYERED TETRATITANATES ANION Hari Sutrisno; Endang Dwi Siswani
Indonesian Journal of Chemistry Vol 7, No 1 (2007)
Publisher : Universitas Gadjah Mada

Intercalation of oligomeric chromium(III) polycation species in layered tetratitanates was prepared by three steps: 1) ion-exchange of H+ for K+ in potasium tetratitanates, 2) intercalation of n-alchylamine (n-propylamine, n-butylamine, n-amylamine, and n-hexylamine) compounds in layered hydrogen tetratitanates by adding an aqueous solution of 5M n-alchylamine to hydogen titanates with stiring at room temperature, and 3) intercalation of oligomeric chromium(III) polycation species by mixing butylamine-intercalated tetratitanates with an aqueous solution of CrCl3.6H2O at pH various. The procedure was carried out by Chimie Douce method. The results showed that all of n-alchylamine-intercalated tetratitanates crystallize on monoclinic crystal system with the Bravais lattice C. The hight intensity of the first peaks (200) indicated that butylamine and amylamine-intercalated tetratitanates have a remarkably high crystallinity without impurities phase. The interlayered distance (d) and the lattice parameter projected along a increase with increasing the amount of C-atoms in n-alchylamine. At pH=1.3, [CrCl(H2O)5]2+ or [CrCl2(H2O)4]+ species was pillared more efective in layered tetratitanates than [Cr(H2O)6]3+ spesies and just one spesies, Cr(H2O)6]3+ at pH=1.7. On the contrary, [Cr(OH)(H2O)5]2+ or [Cr(OH)2(H2O)4]+ was intercalated more effevtive than [Cr(H2O)6]3+ species at pH=5.3.

CRYSTALLIZATION AND CHARACTERIZATION OF CHROMIUM-CONTAINING SILICALITE-1 Hari Sutrisno; Endang Dwi Siswani; Susila Kristianingrum; Suharto Suharto
Indonesian Journal of Chemistry Vol 5, No 3 (2005)
Publisher : Universitas Gadjah Mada

Chromium-containing silicalite-1, designed CrS-1, was synthesized by the hydrothermal method and characterized by XRD and FTIR techniques. The objectives of the research are to study the synthesis of CrS-1 and investigate the effect of crystallization temperatures and times toward its character. All samples of CrS-1 crystallized in orthorhombic structure and Pnma space group. The phase observed in the XRD patterns of CrS-1 synthesized from 150 to 190 oC for 11 days showed only MFI-type phase. The CrS-1 prepared under static condition for 1 day at 150 oC indicated α-SiO2 phase, on the contrary, the samples conditioned for 2 to 8 days at 150 oC are only MFI phase.

Qualitative and Quantitative Phase-Analysis of Undoped Titanium Dioxide and Chromium Doped Titanium Dioxide from Powder X-Ray Diffraction Data Hari Sutrisno; Ariswan Ariswan; Dyah Purwaningsih
Indonesian Journal of Chemistry Vol 18, No 3 (2018)
Publisher : Universitas Gadjah Mada

Undoped titanium dioxide (TiO2) and a series of chromium(III) doped TiO2 (Cr-doped TiOfig. 12) with various %wt Cr atom were prepared by a reflux technique. The undoped TiO2 and Cr-doped TiO2 of 1.1, 3.9, 4.4 %wt Cr atom have been successfully analyzed both qualitative and quantitative analysis of powder X-ray diffraction (XRD) data. The qualitative analysis was carried out with the identification of phases in all samples by comparison with Crystallography Open Database (COD) and International Centre for Diffraction Data (ICDD), while the quantitative phase analysis was calculated by reference intensity ratio (RIR) and whole-pattern fitting (Rietveld analysis) methods. The undoped TiO2 consist of three phases: anatase, rutile, and brookite. In the 1.1 %wt Cr-doped TiO2 are detected presenting two phases: anatase (major) and rutile (minor). In the 3.9 %wt Cr-doped TiO2 andin the 4.4 %wt Cr-doped TiO2 consist of anatase as major phase, while CrO2 and TiO2-II phases can be detected as minor phases. The undoped TiO2 was refined in the phase, crystal system and space group of anatase (tetragonal, I41/amd), rutile (tetragonal, P42/mnm) and brookite (orthorhombic, Pbca), while the 1.1 %wt Cr-doped TiO2 was refined based on anatase (tetragonal, I41/amd), rutile (tetragonal, P42/mnm). Finally, in the 3.9 %wt Cr-doped TiO2 and 4.4 %wt Cr-doped TiO2,respectively were refined in the crystal system and space group of anatase (tetragonal, I41/amd).

Validation of Instrument Multiple Representations for Analyzing the Multiple Representations Capability of Students in Hydrocarbon Materials Antonia Fransiska Laka; Hari Sutrisno
Formatif: Jurnal Ilmiah Pendidikan MIPA Vol 11, No 2 (2021): Formatif: Jurnal Ilmiah Pendidikan MIPA
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Universitas Indraprasta PGRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30998/formatif.v11i2.5922

This study aims to validate multiple representational instruments to analyze the ability of multiple representations of students on hydrocarbon material. This research uses a descriptive quantitative method with a non-experimental approach. This research uses the stratified purposive sampling method with 123 students who will respond to 35 items of multiple-choice questions covering macroscopic, microscopic, symbolic, and mathematical aspects. The data analysis technique used in the research is qualitative data analysis and quantitative data analysis. The Rasch model in this research analyzed instruments such as unidimensionality, item fit, test reliability, and difficulty level of the item. The data analysis shows that the average Aiken index is 0.961 on the substance aspect, 0.93 on the construction aspect, and 0.950 on the language aspect for the theoretical validation results. The highest Aiken index is 1.000, and the lowest is 0.896. Unidimensionality was 32.4%, the result of the item fit analysis obtained 1 item that was not fit, namely item number 29, and for the reliability test results: the person reliability value was 0.65, and the item reliability was 0.97. The analysis results of the difficulty level of the items on the instrument of measuring the cognitive abilities of students with multiple representations types were nine items in the easy category, 14 items in the medium category, and 11 items in the difficult category. Therefore, based on the resulting validity and reliability categories, the compiled test instrument can be used as a tool to measure students’ multiple representation abilities.

Pengujian Validitas dan Reliabilitas Instrumen Konsepsi Pembelajaran Kimia pada Masa Pandemi COVID-19 Menggunakan Pemodelan Rasch Alusti Cundo Manik; Hari Sutrisno; Ifan Rivaldo
Jurnal Penelitian Pendidikan IPA Vol. 8 No. 3 (2022): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i3.1486

This study aims to determine the validity and reliability of students' conception of chemistry learning instruments during the Covid-19 pandemic using Rasch modeling. The developed instrument consists of 24 items tested on 150 students from 3 selected schools classes X, XI, and XII MIPA State Senior High School in Tuban Regency for the 2021/2022 academic year. Two experts tested the content validity of the instrument while the construct validity and item reliability used the Rasch model with Winsteps Rasch software version 3.73. The analysis of the Rasch model used is in the form of item and person separation and reliability, correlation and point measure, Item fit, item rating scale functionality and unidimensionality. The results obtained indicate that the conceptual instrument for chemistry learning that has been developed is valid and reliable. However, the COLS4, COLS6, and COLS11 items are invalid and should be revised or removed

Development of A Learning Module Supported by Augmented Reality on Chemical Bonding Material to Improve Interest and Motivation of Students Learning for Senior High School Achmad Saiful Whatoni; Hari Sutrisno
Jurnal Penelitian Pendidikan IPA Vol. 8 No. 4 (2022): October
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i4.2057

The chemical bonding material is a concept that requires visualization. For students to comprehend chemical bonding concepts better, molecular forms must be depicted in the materials. Consequently, a learning module that can show 3D things made from molecular structures is necessary. This study aims to create and evaluate an augmented reality-based learning module on chemical bonds while examining the similarities and differences between students' interests and learning motivation before and after utilizing the augmented reality-based learning modules. The product is designed utilizing a 4-D model, and this study uses a research and development model. A quasi-experimental method and one group pretest and posttest design were used to evaluate the module involving 53 students chosen randomly. A sample of Hotelling's T2 test was used to analyze the student responses to the questionnaire about interest and motivation for learning. Descriptive quantitative analysis was used to analyze the data from the product quality assessment. The results showed that the developed augmented reality-supported chemical bonding learning module was very suited for chemistry learning and that there were variations between pre- and post-usage in student interest and motivation to study simultaneously or separately

Co-Authors . DARMAWAN . Ismail . SUPUTA Abukasim, Sudarto Abukasim, Sudarto M. Achmad Saiful Whatoni Ajeng Widya Indriana Al Ansary, Ahmad Luthfi Alita, Alita Alusti Cundo Manik Alusti Cundo Manik Amirah, Giska Anik Nur Laili Antonia Fransiska Laka Ariswan Ariswan Ariswan, Ariswam Aurelia Revi Pusbelina Balke, Michael Bruno Cancian de Araujo Cahyorini Kusumawardani Chrisoph Hauser CIPTO WALUYO Dahlan, Jafar Das Salirawati de Araujo, Bruno Cancian Desfi Annisa Desfi Annisa Desfi Annisa, Desfi Dewanty Rafu, Maria Djunijanti Peggie Djunijanti Peggie, Djunijanti Dwi Anggi Marini Eddy Nurtjahya Eko Wahyu Budi Darmawan Eli Rohaeti Endang Dwi Siswani Endang Dwi Siswani Endang Widjajanti Laksono FX Faiz, Rais Assad Fajar Naqsyahbandi Hagus Tarno Hari Purnomo Hauser, Chrisoph I WAYAN SUANA Ifan Rivaldo Iman hidayat Isnaya Khamida Zulfah Jajang Muhariyansah Jayawarsa, A.A. Ketut Kristian Handoyo Sugiyarto Kristina von Rintelen Kun Sri Budiasih Lutfi Afifah, Lutfi Luthfiah, Siska M.Sulthon Nur Harman Syah Putra Maesaroh Maesaroh Maesaroh Maesaroh Maesaroh Maesaroh Maria Tensiana Tima Michael Balke Muhamad Rom Ali Fikri Mulyawan Mursyidin, Abdul Halim Narakusumo, Raden Pramesa Nasihah, Durrotun Nensi Ulfatun Khasanan Nining Rahaningsih NUNUK WIDYASTUTI Nur Kholifah, Dwi Purwaningsih , Dyah Raden Pramesa Narakusumo Ramadhan, Muhammad Hafizh Ratna Novita Sari Retno Arianingrum Rizqiyah, Fatihatur ROSICHON UBAIDILLAH Sandra Desfa Jayanti Schmidt, Stefan Setiawan, Muhamad Reza SISWO POLANDONO Sri Novita Yanda Stefan Schmidt Suasti Ayu Triwijiastuti Sudarsono Suharto . Suharto Suharto Sunarto Sunarto Sunarto Sunarto Susila Kristianingrum Thomas von Rintelen Toto Himawan Vina Ayu Mu'izayanti von Rintelen, Kristina von Rintelen, Thomas wan zahara zaitu hania Wipsar Sunu Brams Dwandaru Wisanggeni Bayu Aji Yanda, Sri Novita Yanti, Insani Efrili

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