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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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TRANSISI FASA TITATNIUM OKSIDA MELALUI KONDENSASI EX-SITU HIDROGEN TITANAT TIPE STRUKTUR LEPIDOKSROSIT Hari Sutrisno; Sunarto Sunarto
Jurnal Penelitian Saintek Vol 15, No 1: April 2010
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The objectives of the research are to study of the structure type of titanium dioxide (TiO2) obtained form the ex-situ condensation of hydrated hydrogen titanates with the structure type of lepidocrocite. Hydrated hydrogen titanates were obtained by ion exchabge of H+ for Cs+ in cesium titanates by 1 M HCl solution by Chimie Douce method. The results show that TiO2 (B), anatase, and anatase-rutile mixture were obtained heat treatment of hydrated hydrogen titanate at 100, 200, 300, 500, and 600oc respectively. The powders were characterized by X-rays diffractometer (XRD), High Resolution Scanning Electron Microscopy (HRSEM) and High Resolution Transmission Electron Microscopy (HRTEM). The research indicated that the protonic titanate, H0.54 Ti1.865 0.135O4 0.5H2O ( =vacancy), lost the interlayer water by being heated up to 200oC to produce a dehydrated phase, H0.54 Ti1.865 0.135O4. Above 300oC, the dehydrated phase completely transformed to TiO2(B) and anatase was obtained as pure phase at 600oC. The phase transformed as the following process: H0.54Ti1.865 0.135O4 0.5H2O à H0.54Ti1.865 0.135O4 0.25H2Oà H0.54Ti1.865 0.135O4 à TiO2(B) à TiO2-anatase.

PREPARASI TiO2-TERSENSITIFKAN AgCl DENGAN TEKNIK REFLUKS DALAM SUASANA ASAM DAN KARAKTERISASINYA Ratna Novita Sari; Hari Sutrisno
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 6 No 1 (2018): Volume 6, Nomor 1, 2018
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (817.539 KB)

ABSTRAK: Titanium dioksida (TiO2)-tersensitifkan variasi prosen berat AgCl (TiO2@AgCl): 0; 1,3; 3,4; 8,3 dan 15,2% dihasilkan dalam suasana asam. Material TiO2@AgCl dipreparasi dari reaksi emulsi TiO2 (rutile)-teradsorpsikan ion Cl-, AgNO3, dan HNO3 dengan teknik refluks pada temperatur 150oC selama 6 jam. Keberadaan AgCl sebagai sensitiser terbentuk dari reaksi ion Cl- yang terabsorbsi pada permukaan TiO2(rutile) dengan ion Ag+ yang berasal dari larutan AgNO3. Sampel TiO2@AgCl yang berisi variasi % berat AgCl: 0; 1,3; 3,4; 8,3 dan 15,2% diperoleh dari reaksi TiO2 (rutile) teradsorpsi ion Cl- dengan variasi % berat perak (Ag): 0; 1,5; 3; 6 dan 9% yang berasal dari AgNO3. Semua TiO2@AgCl yang dihasilkan dikarakterisasi dengan X-Ray Diffraction (XRD) dan Spektrofotometer UV-Vis Diffuse Reflectance. Dalam semua sampel (TiO2@AgCl) mengandung anatase (minor), AgCl (minor) dan rutile (major), kecuali pada TiO2 tanpa AgCl hanya berisi anatase (minor) dan rutile (major). Energi celah pita (Eg) sampel TiO2@AgCl pada prosen berat AgCl: 1,3; 3,4; 8,3 dan 15,2% secara berturut-turut: 3,24; 3,00; 3,09 dan 2,95 eV, sedangkan pada TiO2 tanpa AgCl sebesar 3,05 eV. Ukuran kristal masing-masing fasa dalam TiO2@AgCl yaitu sekitar 5-9 nm untuk fasa anatase, 9-11 nm untuk fasa rutile dan 37-60 nm untuk fasa AgCl. Kata Kunci: pensensitif anorganik, teknik refluks, energi celah pita ABSTRACT: Titanium dioxide (TiO2) sensitized AgCl variations in weight percent (wt%) (TiO2@AgCl): 0; 1.3; 3.4; 8.3 and 15.2% were obtained on the acidic conditions (pH»2). Materials of TiO2@AgCl were obtained from the reaction of TiO2(rutile) adsorbed Cl- ions, AgNO3, and HNO3 via reflux technique at temperatures of 150oC for 6 hours. The existence of AgCl as sensitiser formed from the reaction of Cl-ions are absorbed on the surface of TiO2 (rutile) with Ag+ ions originating from AgNO3 solution. Samples of TiO2@AgCl that contain variations wt% AgCl: 0; 1.3; 3.4; 8.3 and 15.2% was obtained from the reaction of TiO2(rutile) adsorbed Cl- ions at variation wt% of silver (Ag): 0; 1.5; 3; 6 and 9% originating from AgNO3. All of TiO2@AgCl were characterized by X-Ray Diffraction (XRD) and UV-Vis Spectrophotometer Diffuse Reflectance. In all samples (TiO2@AgCl) contains anatase (minor), AgCl (minor) and rutile (major), except on TiO2 without AgCl only contain anatase (minor) and rutile (major). Band gap (Eg) of TiO2@AgCl at AgCl variations in wt%: 1.3; 3.4; 8.3 and 15.2% is 3.24; 3.00; 3.09 and 2.95 eV respectively, whereas the band gap of TiO2 without AgCl is 3.05 eV. The size of each crystal phase on TiO2@AgCl is about 5-9 nm for the anatase phase, 9-11 nm for the rutile phase and 37-60 nm for AgCl phase.

TRANFORMASI POLIMORFIK DAN KARAKTERISASI MIKROSTRUKTUR FASA TiO2 YANG DIHASILKAN MELALUI KALSINASI NANOPITA HIDROGEN TITANAT Hari Sutrisno
Jurnal Sains Dasar Vol 1, No 1 (2012): April 2012
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Sodium titanates were synthesized by hydrothermal method using Ti(O2)O.2H2O as the starting material in 10 M NaOH at 150°C for 72 h. Hydrogen titanate nanoribbons were obtained by ion exchange of H+ for K+ in sodium titanates by 0.1 M HCl. TiO2 (B), anatase, and anatase-rutile mixture were obtained by the calcinations of hydrogen titanate nanoribbons for 2 h at 500, 700, and 900°c respectively. Hydrogen titanate nanoribbons were characterized by X-rays Diffraction (XRD), High Resolution Scanning Electron Microscopy (HRSEM) and High Resolution Transmition Electron Microscopy (HRTEM). Microstructure of pseudo-TiO2 (B), anatase, and rutile prepared by the calcinations of hydrogen titanates have been determinated in ab initio by the Two Stage Method from powder XRD data. Hydrogen titanates nanoribbons convert into pseudo-TiO2(B) then anatase and finaly rutile structures by heat treatment. Keywords: polymorphic transformation, microstructure characterization, titanium dioxide

Pengaruh Perbandingan Mol Awal Titanium dan Perak terhadap Sifat-Sifat Fisika-Kimia TiO2-tersensitifkan AgCl Isnaya Khamida Zulfah; Hari Sutrisno
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 3, No. 2, November 2017
Publisher : Syarif Hidayatullah State Islamic University

Titanium dioksida (TiO2)merupakan semikonduktor yang memiliki fungsi sebagai fotokatalis, sel surya, anti bakteri, anti polutan, dan anti buram. Salah satu cara untuk meningkatkan aktifitas fungsional TiO2dengan menggeser daerah aktifitas atau energi celah pita (Eg) dari sinar ultra violet (UV) ke daerah sinar tampak melalui penambahan zat pensensitif TiO2.Pada penelitian ini, perak klorida (AgCl) digunakan sebagai zat pensensitif TiO2. Tujuan penelitian ini untuk mengetahui pengaruh variasi perbandingan mol awal [Ti8O12(H2O)24]8.Cl8.HCl.7H2O dengan AgNO3 terhadap sifat-sifat fisik TiO2 tersensitifkan AgCl (TiO2@AgCl) yang disintesis dengan metode pengendapan basah dalam suasana asam. Variasi perbandingan awal yang digunakan yaitu perbandingan mol [Ti8O12(H2O)24]8.Cl8.HCl.7H2O :mol AgNO3sebesar 1:9, 1:10, 1:11, 1:12, dan 1:13yang dilarutkan dalam pelarut etanol (total pelarut 37.5 mL). Sampel padat TiO2@AgCl dihasilkan dengan metode pengendapan basah dalam kondisi asam melalui pengontrolan asam HNO3 pada pH~1. Sampel dihasilkan dari penguapan filtrat yang bebas dari endapan AgCl, hingga volume yang didapat setengah dari volume awal. Sampel TiO2@AgCl dikarakterisasi dengan berbagai instrumen: Difraktometer Sinar-X (XRD),Scanning Electron Microscopy-Electron Dispersive X-Ray Analyzer (SEM-EDAX), dan Spektrofotometer UV-Vis Diffuse Reflectance. Hasil penelitian menunjukkan semua sampel TiO2@AgCl berisi 1 fasa nanopartikel (nanokristalit) TiO2 dan 3 fasa kristal yaitu rutil, anatas, dan AgCl.TiO2@AgCl memiliki bentuk morfologi berupa mikrosferik dengan ukuran berkisar 0.5-1 μm. Berdasarkan hasil analisisdengan spektrofotometer UV-Vis Diffuse Reflectance menunjukkan semua sampel TiO2@AgCl mengabsorbsi sinar ultra violet (UV) dengan Eg sebesar 2.87-3.89 eV, dan sinar tampak dengan Eg sebesar 1.60-2.40 eV. Titanium dioxide (TiO2) is a semiconductor that can be applied in the field of photocatalyst, solar cell, anti-bacterial, anti-pollutants, and anti-fogging. The functional activity of TiO2 can be increased by shifting the activity area from ultraviolet (UV) to visible through the addition of sensitizer. In this research, silver chloride (AgCl) was used as a sensitizer The objective of the research is to study the effect of the initial mole comparison of [Ti8O12(H2O)24]8.Cl8.HCl.7H2O and AgNO3on the physical properties of AgCl-sensitized TiO2(TiO2@AgCl). All TiO2@AgCl were synthesized using the wet chemical precipitation method under acidic conditions by the addition of a concentrated HNO3 with pH ~ 1. The initial comparison variation used was the mole ratio of [Ti8O12(H2O)24]8.Cl8.HCl.7H2O : AgNO3 of 1: 9, 1:10, 1:11, 1:12, and 1:13. Each of these materials was dissolved in ethanol to 37.5 ml. All samples were produced from evaporation of filtrate free from AgCl precipitate, until the volume obtained half of the initial volume. The solid samples were characterized using X-Ray Diffractometer (XRD), Scanning Electron Microscopy-Electron Dispersive X-Ray Analyzer (SEM-EDAX), and UV-Vis spectrophotometer Diffuse Reflectance.The results showed that all samples of TiO2@AgCl consisted of 1 phase of TiO2-nanoparticles and 3 phases of rutile, anatase and AgCl crystals. The morphology of TiO2@AgCl is microspheric with a size ranging from 0.5-1 μm. Based on the results of the analysis with the UV-Vis spectrophotometer Diffuse Reflectance showed that all samples of TiO2@AgCl absorb ultraviolet (UV) rays with bandgap (Eg) ranging from 2.87 to 3.89 eV, and the visible light with Eg ranges from 1.60 to 2.40 eV.

INDOBIOSYS – DNA BARCODING AS A TOOL FOR THE RAPID ASSESSMENT OF HYPERDIVERSE INSECT TAXA IN INDONESIA: A STATUS REPORT Bruno Cancian de Araujo; Stefan Schmidt; Thomas von Rintelen; Hari Sutrisno; Kristina von Rintelen; Rosichon Ubaidillah; Chrisoph Hauser; Djunijanti Peggie; Raden Pramesa Narakusumo; Michael Balke
TREUBIA Vol 44 (2017): Vol. 44, December 2017
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/treubia.v44i0.3381

A status report with preliminary results for the IndoBioSys project is presented and the impact of the project results for our knowledge of the Indonesian fauna is discussed. Using the REST API available on the Barcode of Life Data System we recover 21,153 public records (3,390 BINs) from Indonesia and compare against the 21,813 records (3,580 BINs) generated by the IndoBioSys project. From all IndoBioSys BINs, 3,366 (94%) are new to Indonesia. IndoBioSys is responsible for a BIN increase of 36.5% in Lepidoptera, 62.6% in Trichoptera, 986% in Coleoptera, and 1,086% in Hymenoptera. After two years of the IndoBioSys project, the Museum Zoologicum Bogoriense became the depository institution of 51.9% of Lepidoptera records, 95.8% of Coleoptera records, 97.6% of Hymenoptera records and 59.4% of Trichoptera records for Indonesia available on Barcode of Life Data System (BOLD). Now, with 55% of all Indonesian records available on BOLD, it is the most important depository for records of Indonesian genetic biodiversity, housing more than 23,000 new voucher specimens in their collections. Before IndoBioSys, the Museum Zoologicum Bogoriense was responsible for only 9% of all records available in the Barcode of Life Data System for Indonesia, showing the importance of those pipelines in empowering the local institutions in becoming the reference depository of the local fauna.

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.

PENGARUH PEMBELAJARAN PEMECAHAN MASALAH BERBASIS REPRESENTASI MULTIPEL PADA MATERI KESETIMBANGAN KIMIA TERHADAP EFIKASI DIRI SISWA Maria Tensiana Tima; Hari Sutrisno
Jurnal Pendidikan Kimia Indonesia Vol. 4 No. 2 (2020)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jpk.v4i2.21896

Tingkat keberhasilan siswa dalam mempelajari kimia selain dipengaruhi oleh kemampuan penguasaan konsep dan kemampuan pemecahan masalah, ada faktor lain yang dapat mempengaruhi yaitu faktor psikologis siswa seperti afiksasi diri. Tujuan penelitian ini adalah untuk mengkaji afiksasi diri siswa pada penerapan model pembelajaran pemecahan masalah berbasis representasi multipel dengan model pembelajaran pemecahan masalah pada materi kesetimbangan kimia. Penelitian ini merupakan penelitian kuasi eksperimen dengan Posttest Only Design. Sampel dalam penelitian ini adalah dua kelas siswa kelas XI MIPA pada salah satu SMA yang diambil menggunakan teknik Purposive sampling. Kelas eksperimen (26 siswa) diajarkan dengan model pembelajaran pemecahan masalah berbasis representasi multipel sedangkan kelas kontrol (24 siswa) diajarkan dengan model pembelajaran pemecahan masalah. Instrumen yang digunakan untuk memperoleh data dalam penelitian ini adalah instrumen angket. Data yang diperoleh, kemudian dianalisis dengan menggunakan uji statistik parametric. Berdasarkan hasil uji Independent t-test diperoleh nilai signifikansi sebesar 0,002 < 0,05. Sehingga dapat disimpulkan bahwa terdapat perbedaan afiksasi diri siswa antara penerapan model pembelajaran pemecahan masalah berbasis representasi multipel dengan model pembelajaran pemecahan masalah.ABSTRACTThe level of success of students in studying chemistry is not only influenced by the ability to master concepts and problem-solving abilities, there are other factors that can influence, namely students' psychological factors such as self-efficacy. The aims of this study were to examine students' self-efficacy in the application of multiple representation-based problem-solving learning models with problem-solving learning models on chemical equilibrium material. This research is a quasi-experimental study with Posttest Only Design. The sample in this study were two classes of students of class XI MIPA at a high school who were taken using purposive sampling technique. The experimental class (26 students) was taught with a problem-solving learning model based on multiple representations while the control class (24 students) was taught with a problem-solving learning model. The instrument used to obtain data in this study was a questionnaire instrument. The data obtained were then analyzed using parametric statistical tests. Based on the results of the Independent t-test, it was obtained a significance value of 0.002 < 0.05. So, it can be concluded that there are differences in student self-efficacy between the application of multiple representation-based problem-solving learning models with problem solving learning models.

The Use of The Rasch Model to Develop Students' Conception of Chemistry Learning Instruments During the Covid-19 Pandemic Ifan Rivaldo; Hari Sutrisno; Alusti Cundo Manik
Jurnal Pendidikan Kimia Indonesia Vol. 6 No. 1 (2022)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jpk.v6i1.45338

Perbedaan konsepsi belajar tergantung pada pengalaman belajar kimia yang dirasakan peserta didik. Perbedaan ini semakin tampak ketika peserta didik harus menjalani pembelajaran jarak jauh dikarenakan pandemi. Untuk mengukur perbedaan tersebut, instrumen konsepsi belajar kimia yang terdiri dari 24 item dengan skala likert dikembangkan dan divalidasi oleh para ahli secara konstruk serta secara empiris dengan menerapkan analisis model Rasch menggunakan software WINSTEPS® (versi 3.73). Tujuan penelitian ini yaitu mengembangkan instrumen konsepsi belajar yang spesifik mengukur konsepsi belajar kimia. Jenis penelitian ini yaitu pengembangan. Populasi penelitian ini sejumlah 247 siswa sekolah menengah atas. Metode yang digunakan untuk mengumpulkan data yaitu survei. Instrument yang digunakan untuk mengumpulkan data yaitu kuesioner. Kualitas psikometrik kuesioner yang dianalisis meliputi reliabilitas, statistik kesesuaian item, penggunaan skala penilaian, dan bias item terhadap gender (Differential Item Functioning (DIF)). Teknik yang digunakan untuk menganalisis data yaitu analisis deskriptif kualitatif dan kuantitatif. Hasil penelitian menunjukkan bahwa model Rasch cocok dengan data pengukuran meliputi reliabilitas person dan item (>0,8). Sembilan belas item memenuhi nilai penerimaan untuk statistik kesesuaian item. Selain itu, kategori pada skala berfungsi dengan baik dan bebas dari ketidakteraturan dari nilai Andrich-Threshold. 2 dari 4 item bias gender kemudian dipertahankan dengan merevisi kuesioner. Disimpulkan bahwa instrumen valid dan dapat digunakan untuk mengukur konsepsi belajar kimia.

Effect of V Dopant on Physicochemical Properties of Vanadium-Doped Anatase Synthesized via Simple Reflux Technique Hari Sutrisno; Ariswan Ariswan; Dyah Purwaningsih
Journal of Mathematical and Fundamental Sciences Vol. 48 No. 1 (2016)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.math.fund.sci.2016.48.1.8

Mesoporous pure TiO2 (M-TiO2) and mesoporous-vanadium-doped TiO2 (M-V-doped TiO2) were successfully synthesized via a facile and simple reflux technique. The purpose of this research was to study the effect of vanadium dopant on the physicochemical properties of all materials obtained. Characterization of the prepared materials was carried out using X-ray diffraction (XRD), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) and N2-adsorption-desorption analysis. The presence of Ti and O elements in M-TiO2 and of Ti, V and O elements in M-V doped TiO2 could be detected by SEM-EDS, while the patterns of X-ray diffraction of all the prepared samples had a well-crystalline surface of anatase type. All mesoporous vanadium-doped TiO2 (M-V-doped TiO2) materials performed in a highly transparent mode in the visible region at 554 nm (Eg = 2.24 eV) and 588 nm (Eg = 2.12 eV) for 3.3 and 4.9 wt% V doped TiO2, respectively. The Rietveld refinement method was applied to extract the structural parameters of the M-TiO2 and M-V-doped TiO2 using the Fullprof program in the WinPlotr package. The prepared materials were refined in the crystal system and space group of anatase (tetragonal, I41/amd (141)). The vanadium ion was successfully doped into TiO2. The isotherm type of M-TiO2 and 2.3 wt% V doped TiO2 were of type IV, with a profile of type H2 hysteresis loops, while the 3.3 and 4.9 wt% vanadium-doped TiO2 reflected isotherm type III. The Brunauer-Emmett-Teller (BET) results showed a significant reduction in surface area due to increased concentrations of vanadium. The highest values of BET-specific surface area, pore volume and average pore size of M-TiO2 were 46 m2/g, 18.45 nm and 0.2572 cm3/g respectively.

Effect Of Non-metal Elements (C, N, S) As Anionic Dopants On Electronic Structure Of Tio2-Anatase By Density-Functional Theory Approach Hari Sutrisno
Molekul Vol 11, No 1 (2016)
Publisher : Universitas Jenderal Soedirman

This article is a theoritical approach to calculate the electronic structure of undoped- and non-metal anions doped-TiO2-anatase. The objective of the research is to calculate abinitio the band structure and the density of states (DOS) of undoped-, C-, N-, and S-doped TiO2-anatase. Kohn-Sham equations are performed with the density functional theory (DFT) using the local density approximation (LDA) for exchange-correlation functional. The first-principle calculations were done using supercell (2x2x1) methods as implemented within Amsterdam Density Functional (ADF)-BAND version 2014.10. The ab-initio calculation of the band structures show that all samples are direct- and indirect-gap type semiconductor. The band gap of TiO2-anatase with DFT using LDA is 2.43 eV. The addition of C atom at 0.943% in 48 atoms produces width intermediate band about 0.76 eV, which is 0.38 eV above the valence band (VB) and 1.38 eV below the conduction band (CB). The addition of N atom at 1.103% and S atom at 2.478% in the lattice structure of TiO2-anatase resulted in the addition of the VB width to 0.47 eV and 0.11 eV, while the resulting gap between the VB and the CB to 1.97 eV and 2.33 eV, respectively.

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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