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All Journal Jurnal Penelitian Saintek EKSAKTA: Journal of Sciences and Data Analysis Jurnal Sains Dasar Science and Technology Indonesia Indonesian Journal of Chemistry Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Molekul: Jurnal Ilmiah Kimia Jumat Pendidikan: Jurnal Pengabdian Masyarakat Indonesian Journal of Chemistry and Environment Jurnal Elemen Kimia Jurnal Riset Pembelajaran Kimia
Cahyorini Kusumawardani
Universitas Negeri Yogyakarta
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Environmental Science Materials Science & Nanotechnology Physics Social Sciences Other

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The Effect of the Hydrothermal Time and Temperature in the Synthesis to the Properties of Nitrogen-doped TiO2 Misbah Rijal Ulhaq; Cahyorini Kusumawardani
Indonesian Journal of Chemistry and Environment Vol 5, No 1 (2022): JUNE 2022
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijoce.v5i1.51822

Abstract

Nitrogen-doped TiO2 (N-TiO2) has been synthesized through hydrothermal method by reacting the ethanolic solution of ethylene diamine with titanium precursor. The acidic contition was adjusted by the addition of glacial acetic acid. The hydrolysis process was done using hydrothermal process at various hydrothermal time and temperatures. The resulting materials were characterised FTIR, XRD, and Diffuse Refflectance UV/VIS Spectroscopy. The result showed that the increase of hydrothermal temperature lead to increase of particle size, but decreasing the band gap energy. However, the longer the hydrothermal time provided the decrease of particle size with no sugnificantly effect to the band gap energy.
Sol-Gel Synthesis and Characterization of Carbon doped TiO2 based on Solanum Tuberosum Starch Diandari Siti Nur Ichsani; Cahyorini Kusumawardani
Indonesian Journal of Chemistry and Environment Vol 4, No 2 (2021): DECEMBER 2021
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (654.009 KB) | DOI: 10.21831/ijoce.v4i2.48417

Abstract

The carbon-doped TiO2 have been synthesized through sol-gel method using Solanum tuberosum starch as carbon source.  The carbon precursor composition and reaction time were varied to study its influence to the crystal structure and electronic structure of resulted material. The C- TiO2 product was characterized by XRD, UV-Vis DRS, FTIR, and photocatalytic activity examine by methylene blue degradation. The results showed that variations in the composition of the carbon precursor and reaction time affected the characteristics of the crystal structure and photocatalyst activity of C- TiO2. The optimum variation was found in the variation of 1.5 gram carbon composition and 24 hours hydrolysis time which had the smallest particle size and lowest bandgap energy. The highest photocatalyst activity was obtained at a 24-hour reaction time variation with 59.375% percent of methylene blue degraded in the second-order reaction with a k value of 2.1351.
Optimization of Energy and Time Variations for Synthesis of N doped TiO2 Nanotube using Microwave-Asssisted Hydrothermal Method Cindy Candrika Anugrahayu; Cahyorini Kusumawardani
Indonesian Journal of Chemistry and Environment Vol 3, No 2 (2020): DECEMBER 2020
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (531.739 KB) | DOI: 10.21831/ijce.v3i2.43509

Abstract

This study aimed to determine the effect of energy and time hydrothermal microwave time variations on the crystal structure and N-TiO2 nanotube photocatalytic activity. The synthesis of N-TiO2 nanotube was performed with the hydrothermal microwave method. The N-TiO2 preparationwas carried out by dissolving ethylenediamine precursor in 80 ml of 96% ethanol and 3 ml TTIP which was reacted at 70 °C for 4 hours. The obtained N-TiO2 was formed into nanotubes used the hydrotermal microwave method in low temperature (180W), medium temperature (360 W), and high temperature (720 W) with time variations of 30 minutes, 1 hour, and 2 hours. The microwave hydrothermal process in this study used 10 M NaOH to form a tubular structure and 0.5 M HCl as an ion exchange. The characterization analysis performed by X-Ray Diffraction, UV-Diffuse Reflectance Spectroscopy, and blue methylene degradation. The results of this study indicate that the variations of time and energy of the microwave hydrothermal method affect the crystal structure of the N-TiO2 nanotubes. The nanotubes structure has been formed at a variety of low energy 2 hours, medium energy 0.5 hours, 1 hour and 2 hours, and high energy 2 hours. Energy and time variations of hydrothermal microwave affect the photocatalytic activity of N-TiO2 nanotubes showed second-order kinetics. The best percentage of degradation produced in the T2 variation is the photocatalyst reaction of 71.89% and the adsorbs reaction of 64.81%.
Synthesis of Powdered [Mn(bipy)3](CF3SO3)2·5.5H2O: The Physical Properties and Antibacterial Activity Kristian Handoyo Sugiyarto; Dwi Anggi Marini; Hari Sutrisno; Dyah Purwaningsih; Cahyorini Kusumawardani
Indonesian Journal of Chemistry Vol 23, No 1 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.77565

Abstract

The synthesis of the complex containing manganese(II), bipyridine (bipy) as a ligand, and an anionic trifluoromethane sulfonate (triflate) is reported. The corresponding metal content, conductance, and DTG-TGA of the complex lead to the formula of [Mn(bipy)3](triflate)2·5.5H2O. The fully high-spin magnetic moment is observed, corresponding to five unpaired electrons in the metal ion. The electronic spectral bands suggest the three possible spin-forbidden transitions of the sextet to quartet states. The mode of vibrations of the IR spectrum supports the typical ring of bipy, and the triflate. The images of SEM-EDX indicate the presence of the corresponding elemental content and reflect the relatively high crystallinity, as it is evidenced in the profile of the corresponding powdered diffractogram. The refinement of powdered XRD following the Le Bail program suggests being structurally triclinic symmetry of P21/c. This complex shows inhibition of bacterial activity against S. aureus and E. coli.
The Calcination Effect on the Crystallinity, Nitrogen Content, and Pore Structure of Nitrogen-Doped Titanium Dioxide Cahyorini Kusumawardani
Jurnal Sains Dasar Vol 11, No 2 (2022): October 2022
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jsd.v11i2.60004

Abstract

Mesoporous nitrogen-doped titanium dioxide nanomaterials have been synthesized through a one-step sol gel process with dodecylamine as the pore template as well as the nitrogen source. The calcination process plays an important role in the crystallization process, determination of doped nitrogen, and pore formation. The effect of calcination temperature on the material structure was studied by calcination treatment of the as-synthesized material at several temperature variations. The resulting materials were characterized using FTIR, XRD, XPS, and N2 gassorption analysis.  The results showed that the anatase TiO2 crystal structure began to form with calcination at 400 °C. The higher calcination temperature tends to cause the transformation of anatase crystal phase into rutile. The higher calcination temperature also affects the doped nitrogen content, where the pore-templating molecules begin to disappear at a calcination temperature and leaving a number of dopants on TiO2. All dopants are released from TiO2 at a calcination temperature of 600 °C. The optimum calcination temperature to form mesoporous structure was 450 °C, and the sintering occurs at a calcination temperature higher than optimum temperature indicated by the collapse of the pore structure.
THE EFFECT OF SYNTHESIS STEP AND HEATING TEMPERATURE ON SYNTHESIS OF MATERIALS CH3NH3PbI3 Ari Safitri; Cahyorini Kusumawardani
Jurnal Elemen Kimia Vol 7, No 5 (2018): Jurnal Kimia Dasar
Publisher : Universitas Negeri Yogyakarta

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Abstract

AbstractResearch on the effeect of one-step and two-step methods on the electronicstructure and character of perovskite material CH3NH3PbI3 has been carried out, aswell as the effect of temperature variations on the perovskite material CH3NH3PbI3.Synthesis with one-step method was carried out by dissolving PbI2 in DMF (taken byfiltrate) and dissolving CH3NH3I in isopropanol then the filtrate and CH3NH3Isolutions were mixed and stirring was carried out. After the two mixed solutions arethen coated on a glass substrate that has been coated with compact-TiO2 dan m-TiO2,heating on the hotplate at 130°C for 15 minutes. The two-step method was carriedout by dissolving PbI2 in DMF (taken by filtrate), then coating it on a glass substrate,then dissolving CH3NH3I in isopropanol and overlaying PbI2 then heated on ahotplate at 130°C for 15 minutes. Optimal temperature determination is carried outaccording to the one-step synthesis, heating temperature above the hotplate 100°C,110°C, 130°C, and 150°C. The synthesis material was then characterized using XRDand UV-Vis.The XRD characterization results showed that CH3NH3PbI3 materialsynthesized in one step and two stages had an effect on the crystal size of 29.0567 nmand 22.60172 nm, while for amorphous crystal structure temperature variations. Theresults of UV-Vis analysis result obtained absorbance data and band gap energy.One-step synthesis method produces a maximum absorbance of 745 nm, a synthesismethod of two-step 733 nm, for the maximum temperature variation of absorbancedata at 100°C, 110°C, 130°C, and 150°C is 585 nm, 585 nm, 481 nm, and 484 nm.Band gap energy has an effect on the synthesis of CH3NH3PbI3 material with onestepand two-step. In the one-step synthesis method, the band gap energy is 1.543 eVand the two-step synthesis method obtained 1.614 eV, while for temperature variationproduces 2.67 eV to 3.74eV.Keywords: CH3NH3PbI3, One-Step, Two-Step, Temperature Variation
SINTESIS SENYAWA PbS DENGAN AMILUM SEBAGAI CAPPING AGENT UNTUK APLIKASI QUANTUM DOT SENSITIZED SOLAR CELLS (QDSSC) Vatrika Anggriana Putri; Cahyorini Kusumawardani
Jurnal Elemen Kimia Vol 5, No 2 (2016): Jurnal Mahasiswa Kimia FMIPA UNY
Publisher : Universitas Negeri Yogyakarta

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Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh variasi penambahan amilum terhadap ukuran partikel dan karakter elektronik dari material PbS. Sintesis ini dilakukan menggunakan metode sol-gel selama 2 x 7,5 jam dengan prekursor Pb(CH3COO)2.3H2O, (NH4)2S dan amilum sebagai capping agent dengan variasi 0,2; 0,5; 1; 2 dan 3 gram. Hasil XRD menunjukkan bahwa struktur kristal material PbS tanpa amilum dan dengan amilum adalah kubik dengan rata-rata nilai parameter kisi berturut-turut yaitu 5,9163 Ao dan 5,8078 Ao yang mendekati nilai pada data standar JCPDS No. 05-0592. Sedangkan hasil karakterisasi menggunakan UV-Vis menghasilkan nilai energi celah pita material PbS tanpa amilum  sebesar 1,68 eV, PbS 0,2 sebesar 3,41 eV, dan PbS 1 sebesar 2,4 eV. 
UJI AKTIVITAS FOTOKATALIS SENYAWA Ca1-xCoxTiO3 PADA PROSES DEGRADASI METILEN BIRU DENGAN SINAR UV DAN SINAR TAMPAK Yuzzaini Dwi Kurniawati; A.K Prodjosantoso A.K Prodjosantoso; Cahyorini Kusumawardani
Jurnal Elemen Kimia Vol 5, No 5 (2016): Volume 5, No 5 Edisi 5 Tahun 2016
Publisher : Universitas Negeri Yogyakarta

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Abstract

Penelitian ini bertujuan untuk mengetahui aktivitas fotokalis senyawaCa1-xCoxTiO3 dengan menggunakan sinar UV dan sinar tampak pada prosesdegradasi metilen biru.Senyawa Ca1-xCoxTiO3 (x = 0,025) diuji aktivitasnya dengan menggunakanmetode spektoskopi menggunakan lampu UV Evaco 20 watt sebagai sumber sinarUV dan lampu mercury 100 watt sebagai sumber sinar tampak pada variasi t = 5,10, 20, 30, 50, 80 dan 120 menit.Hasil analisis data menunjukkan bahwa senyawa Ca1-xCoxTiO3 dapatdigunakan sebagai fotokatalis pada reaksi fotodegradasi metilen biru denganmenggunakan sumber sinar UV dan sinar tampak. Metilen biru terdegradasi sebesar83,76% pada sinar UV, sedangkan pada sinar tampak sebesar 80,03%. Kinetikareaksi degradasi metilen biru mengikuti reaksi orde dua. Laju reaksi fotodegradasimetilen biru di bawah sinar UV sebesar 0,41533 ppm.menit-1, sedangkan laju reaksifotodegradasi metilen biru di bawah sinar tampak sebesar 0,35293 ppm.menit-1.Sinar UV mempunyai pengaruh sedikit lebih aktif dari sinar tampak pada prosesfotodegradasi metilen biru menggunakan senyawa Ca1-xCoxTiO3
SINTESIS NANOPARTIKEL PbS MELALUI METODE SOL-GEL DENGAN EDTA SEBAGAI CAPPING AGENT Bintang Tanjung Sari; Cahyorini Kusumawardani
Jurnal Elemen Kimia Vol 5, No 2 (2016): Jurnal Mahasiswa Kimia FMIPA UNY
Publisher : Universitas Negeri Yogyakarta

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Penelituan ini bertujuan untuk mengetahui pengaruh variasi penambahan EDTA terhadap ukuran partikel dan karakter elektronik pada material PbS. Nanopartikel PbS EDTA disintesis dengan metode sol-gel dengan prekusor Pb(CH3COOH)2 sebagai sumber Pb dan (NH4)2S sebagai sumber S serta EDTA sebagai capping agent. Konsentrasi EDTA yang digunakan adalah: 0 mmol; 0,1 mmol; 0,2 mmol; 0,5 mmol dan 1 mmol. Proses sol-gel dilakukan dengan mengaduk setiltrimetil amonium bromida (CTAB), natrium dodesil sulfat (SDS) dan EDTA sampai homogen, kemudian ke dalam campuran ditambahkan Pb(CH3COOH)2 dan (NH4)2S dan diaduk selama 5 menit untuk menghasilkan endapan PbS yang berwarna hitam. Endapan disaring dan dioven pada suhu 120oC selama 3 jam. Pola XRD menunjukkan bahwa struktur PbS adalah kubik, dengan ukuran partikel masing-masing sampel adalah 8,99 nm; 2,36 nm; 12,7889 nm; 12,5650 nm dan 21,8003 nm. Sedangkan hasil karakterisasi dengan UV-Vis menghasilkan nilai energi celah pita untuk PbS/EDTA masing-masing sampel adalah 3,2 eV; 3,3 eV; 2,8 eV; 2,8 eV dan 2,3 eV.Kata kunci: nanopartikel, sel surya, EDTA, capping agent
SINTESIS SENYAWA TiO2 TERDOPING NITROGEN SEBAGAI LAPISAN MESOPORI PADA SINTESIS MATERIAL TiO2/CH3NH3PbI3 Denny Hadya Khoirulfatihin; Cahyorini Kusumawardani
Jurnal Elemen Kimia Vol 7, No 5 (2018): Jurnal Kimia Dasar
Publisher : Universitas Negeri Yogyakarta

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Abstract

AbstrakPenelitian ini bertujuan untuk mengetahui pengaruh perbandingan mol TTIP dandodesilamin terhadap karakteristik material mesoporous-TiO2 terdoping nitrogen sertamengetahui pengaruh jenis pelarut terhadap karakteristik material TiO2/CH3NH3PbI3. Materialmesoporous-TiO2 terdoping nitrogen dihasilkan melalui metode sol-gel satu langkah denganprekursor Titanium (IV) Isopropoksida dan Dodesilamin sebagai sumber nitrogen dan pencetakpori. Sintesis dilakukan dengan variasi perbandingan mol TTIP dan Dodesilamin yaitu 1:1, 1:2,1:3, 1:4 dan 1:5. Pada proses refluks digunakan temperatur 80oC dengan waktu 6 jam. Kalsinasidilakukan pada temperatur 450oC selama 4 jam. Diperoleh serbuk berwarna putih kekuningan.Selanjutnya material mesoporous-TiO2 terdoping nitrogen dilapiskan pada kaca yang sudahdilapisi c-TiO2. Material TiO2/CH3NH3PbI3 dibuat dengan mencampurkan larutan CH3NH3Idalam Isopropanol dan PbI2 dalam pelarut yang divariasikan yaitu DMF, DMSO,DMF/DMSO=1:1 dan Asetonitril. Selanjutnya larutan tersebut dilapiskan pada substrat yangsebelumnya telah dilapisi dengan compact-TiO2 dan mesoporous-TiO2. Hasil karakterisasi XRDmenunjukkan perbandingan mol TTIP dan dodesilamin dalam sintesis material mesoporous-TiO2 terdoping nitrogen tidak berpengaruh terhadap fasa, namun mempengaruhi ukuran kristalyang terbentuk, dilakukan karakterisasi UV-Vis terhadap sampel dengan perbandingan molTTIP/DDA 1:2, karena menunjukkan peningkatan ukuran kristal yang cukup signifikan akibatadanya nitrogen dalam kisi kristal TiO2, namun dengan rasio mol TTIP/DDA yang cukup kecil,diperoleh nilai energi celah pita sebesar 3,26 eV. Jenis pelarut sangat mempengaruhi nilai energicelah pita dari material TiO2/CH3NH3PbI3. Sampel dengan pelarut DMF/DMSO 1:1 merupakanyang paling mendekati nilai energi celah pita dari senyawa CH3NH3PbI3 menurut teori. Sampelmaterial TiO2/CH3NH3PbI3 yang memungkinkan untuk diaplikasikan pada sel surya perovskiteyaitu sampel dengan pelarut DMF/DMSO 1:1 dan pelarut asetonitril, meskipun hasilkarakterisasi XRD menunjukkan bahwa seluruh sampel bersifat amorf yang disebabkan olehmaterial TiO2/CH3NH3PbI3 yang telah terdegradasi.Kata kunci : TiO2, nitrogen, mesoporous, CH3NH3PbI3.
Co-Authors A.K Prodjosantoso A.K Prodjosantoso Ari Safitri Bintang Tanjung Sari Christanty Wahyu Septyaningrum Cindy Candrika Anugrahayu Crys Fajar Partana Crys Fajar Partana Denny Hadya Khoirulfatihin Diandari Siti Nur Ichsani Dina Dina Dwi Anggi Marini Dyah Purwaningsih, Sugi Rahayu Pujianto Erna Warisman Hari Sutrisno Harno Dwi Pranowo Harno Dwi Pranowo Hasan Adidarma Isti Yunita Jaslin Ikhsan Jati, Andreas Ary Chrisna Khoiriyah Lukman, Laila Kristanti Eka Wulandari Kristian Handoyo Sugiyarto Kristiyan Handoyo Sugiyarto Kun Sri Budiasih Misbah Rijal Ulhaq Mudasir Mudasir Mudasir Mudasir Noviyan Darmawan Nur Azizah Sri . Handayani Sri Handayani Sukisman Purtadi Vatrika Anggriana Putri Yusuf Bramastya Apriliyanto Yuzzaini Dwi Kurniawati