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All Journal Jurnal Kimia Riset Martabe : Jurnal Pengabdian Kepada Masyarakat Jurnal Abdi: Media Pengabdian Kepada Masyarakat Swara Patra : Majalah Ilmiah PPSDM Migas Unesa Journal of Chemistry Indonesian Journal of Chemical Science Algoritma: Jurnal Matematika, Ilmu Pengetahuan Alam, Kebumian dan Angkasa

DINA KARTIKA MAHARANI

Unknown Affiliation

Author-ID : 296155

Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Energy Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Pelatihan Penulisan Artikel Ilmiah Berbasis Penelitian Tindakan Kelas (PTK) Bagi Guru Kimia SMA di MGMP Kimia SMA Kabupaten Kediri Rusly Hidayah; dina kartika maharani; muchlis muchlis
Jurnal ABDI: Media Pengabdian Kepada Masyarakat Vol. 5 No. 2 (2020)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ja.v5n2.p107-110

Telah dilakukan kegiatan pengabdian kepada masyarakat (PKM) di Kabupaten Kediri. Tujuan kegiatan adalah kemampuan guru kimia dalam menyusun artikel ilmiah berbasis Penelitian Tindakan Kelas (PTK) dan respon guru selama mengikuti kegiatan pelatihan. Langkah-langkah kegiatan pengabdian kepada masyarakat yang dilakukan adalah kegiatan penyegaran materi penyusunan artikel ilmiah berbasis PTK. Evaluasi dilakukan dengan angket kepada peserta untuk mendapatkan data respon terhadap pelaksanaan pelatihan dan penilaian terhadap artikel ilmiah yang dihasilkan oleh peserta pelatihan. Berdasarkan data hasil pelatihan, dapat disimpulkan bahwa: (1) respon peserta pelatihan sangat baik terhadap pelatihan ini, (2) kemampuan guru MGMP Kimia di Kabupaten Kediri dalam menyusun artikel ilmiah adalah baik.Kata Kunci: pelatihan, artikel ilmiah, PTK

PENGARUH SUHU KALSINASI TERHADAP UKURAN KRISTAL DAN KOMPOSISI FASA PADA SENYAWA TiO2 Amos Tigor Tobing; Dina Kartika Maharani
Unesa Journal of Chemistry Vol 10 No 3 (2021)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

TiO2 or commonly called Titanium dioxide is a semiconductor transition metal. This metal is commercially shaped white powder. This material is often used in research into the development of photocatalysts effects in material. TiO2 is used in paints as compounds that give rise to self-cleaning properties. This property is the nature of a material to clean itself from impurities. Self cleaning works with the help of the photocatalyst effect, which is where with the help of photon energy. Therefore semiconductor material can be used in these properties. This is because Titanium dioxide is a semiconductor compound which has a band gap energy of 3.2 eV for the anastase phase, and for the rutile phase of 3.0 eV. This study aims to determine the effect of calcination temperature on the characteristics of TiO2 compounds. In this research, TTiP is a precursor of TiO2 synthesis, and the method used is the sol-gel method. After synthesis, TiO2 is calcined at 400°C, 450°C, 500°C, and 550°C. The characterization carried out in this research is to use the Fourier Transform Infra Red (FTIR) instrument that functions to determine the functional groups formed and the X-Ray Diffraction (XRD) instrument which functions to determine the phase composition of the compound. From the research that has been carried out obtained functional groups -OH, Ti-O, and Ti-O-Ti. This shows that TiO2 was successfully formed through the sol-gel method. In the phase analysis, the results showed that TiO2 is in the anastase phase. This shows that TiO2 can function well when applied to photocatalysts Keywords: Titanium Dioxide (TiO2), Calcination Temperature, photocatalysts, Self cleaning

KARAKTERISASI FILM PVA/KITOSAN/ZEOLIT TERSUBTITUSI ION Ag+ BERPOTENSI SEBAGAI KEMASAN AKTIF Dina Kartika Maharani; Rizka Dwi Safitri
Unesa Journal of Chemistry Vol 11 No 1 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

The need for fresh food continues to increase. Fresh food has a short shelf life. This can be overcome by active packaging containing antimicrobial substances. Zeolite is modified by ion exchange with silver, where silver acts as an antimicrobial agent. This study aims to study the changes in the mechanical properties of the PVA/chitosan mixture with the addition of zeolite-Ag compared to without the addition of zeolite-Ag. The variation in this study is the addition of zeolite-Ag to the PVA/CS composite, namely (0.025; 0.05; 0.1; 0.2)%. The films that have been made were analyzed in terms of mechanical properties, FTIR, and surface morphology microstructure. Composite films containing zeolite-Ag showed an increase in tensile strength and elasticity, where confirmed zeolite can be used as a reinforcing material in polymer matrices. The composite film with 0.025% zeolite-Ag content has a tensile strength value of 46.534 MPa, because zeolite-Ag can be homogeneously dispersed in the polymer matrix. FTIR analysis showed that the mixture of PVA and chitosan proved to be uniformly mixed. Morphological microstructural analysis showed homogeneous surface results, there was no visible appearance of zeolite-Ag aggregates on the PVA/CS film, whereas on films containing 0.025% zeolite-Ag there was a heterogeneous surface and the appearance of black circles indicating the presence of zeolite-Ag. Key words: characterization, film composite, zeolit, silver

SIFAT MEKANIK FILM KITOSAN/PVA DENGAN ZEOLIT TERSUBSTITUSI PERAK SEBAGAI KEMASAN AKTIF Dina Kartika Maharani; Weka Firda Rizki Nurzulla
Unesa Journal of Chemistry Vol 11 No 1 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

The discussion about adding silver-substituted zeolite on the composite chitosan/PVA has been done with the percentage of silver-substituted zeolite (0,025;0,05;0,1; and 0,2(%w/v)). The ion exchanged between zeolite and silver by immersion method, which is ions Ag+ will doped on to zeolite replace the ions Na+. The Chitosan/PVA films have been obtained are characterized using FTIR and SEM and tested for mechanical properties using Autograph Microcomputer Control Universal Testing. The obtained data indicated that adding zeolite doped with silver increase the mechanical properties of a film. The best mechanical properties showed on addition zeolite/Ag 0,2 (% w/v) with tensile strength 32,733 MPa, elongation at break 42,8%, and modulus young 0,765 Mpa. Functional group identification result by FTIR showed a shift in the O-H and N-H vibration to a lower frequency caused by the addition of zeolite/Ag to the film. Morphological characterization using SEM showed that there are differences on surface morphology between chitosan/PVA before and after the addition of silver-substituted zeolite, Scanning Electron Microscope (SEM) results show there is small particles due to the presence of Zeolit/Ag. Key words: Chitosan, Zeolite, Silver, Mechanical Properties

Preparasi dan Karakterisasi Komposit Kitosan-ZnO sebagai Agen Hidrofobik pada Kain Katun Dina Kartika Maharani; Kayla Naulia Fadhila
Unesa Journal of Chemistry Vol 11 No 1 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

This study aims to make a composite material from chitosan and ZnO as well as its application as a hydrophobic agent for cotton fabrics through a chitosan-ZnO composite coating process on cotton fabrics. The manufacture of chitosan-ZnO composites used the sol-gel method with variations in the volume ratio of chitosan to ZnO, namely 7:3, 6:4, 5:5, 4:6 and 3:7. The hydrophobicity of cotton cloth coated with chitosan-ZnO composite was measured using the water contact angle (WCA) method and the highest water contact angle was 131º for the variation of chitosan: ZnO of 7:3. Characterization of chitosan-ZnO composites using FTIR and XRD instruments The FTIR results show an interaction of chitosan with ZnO, this is supported by the presence of C=O groups observed at wave numbers 1556 cm-1, C-N groups appear at 1397 cm-1 and 1338 cm-1, –OH and –NH groups are detected at 3242 cm-1, O-Zn-O bonds were identified at 425 cm-1 and also –C-O-C- bonds between the chitosan group and ZnO were seen at 1019 cm-1 and 1052 cm-1. XRD results showed peaks at 2θ 37.1º, 246.82º and 68.31º indicating the presence of a ZnO nanoparticle crystalline phase and characteristic peaks of chitosan at 2θ 10.6º and 2θ 21.8º. The results of FTIR and XRD characterization show that the chitosan-ZnO composite has been successfully synthesized. Key words: Hydrophobic, Chitosan-ZnO Composites

Pengaruh Penambahan SiO2 dan TiO2 terhadap Sifat Hidrofobik Komposit Kitosan- ZnO Pada Kain Dina Kartika Maharani; Nur Lailiyah
Unesa Journal of Chemistry Vol 11 No 1 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

This study purposed to determine the effect of adding TiO2 sol and SiO2 sol to chitosan-ZnO composites on the hydrophobic properties of fabrics through the fabric coating process. The data obtained of consisted qualitative and quantitative data. Data analysis used qualitative descriptive manner. The addition of TiO2 and SiO2 to Chitosan-ZnO using the sol-gel method. Composite coating on the fabric using the dip-coating method with a volume ratio of TiO2:ZnO 1:1 and SiO2:ZnO 1:1. Hydrophobicity test using the WCA method obtained contact angle of the chitosan-ZnO is 101o, chitosan-TiO2/ZnO is 142o and chitosan-SiO2/ZnO is 127o, then characterized using FTIR, showed the interaction of chitosan and ZnO marked by a peak in the area of 430 cm-1; 1556 cm-1; 1397 cm-1; 1338 cm-1; 3242 cm-1; 1052 cm-1 and 1019 cm-1. The formation of Chitosan-ZnO/TiO2 was seen from the wave shift and changes in the absorption intensity of Chitosan-ZnO at peak of 3242 cm-1 to 3450 cm-1; 1556 cm-1 to 1548 cm-1; 1397 and 1338 cm- 1 became 1400 and 1336 cm-1; 1052 and 1019 cm-1 became 1151 and 1023 cm-1 and a new peak appeared at 850 cm-1. The formation of Chitosan-ZnO/SiO2 was seen from the wave shift and changes in the absorption intensity of Chitosan-ZnO at peak of 3242 cm-1 to 3257 cm-1; 1556 cm-1 to 1589.34 cm-1; 1397 and 1338 cm-1 becomes 1401 and 1342 cm-1; 1052 and 1019 cm-1 becomes 1066 and 1020 cm-1 also new peaks of 938 cm-1. Keywords: Chitosan-ZnO Composite, TiO2, SiO2, Hydrophobic

Karakterisasi Abu Sekam Padi dengan Menggunakan XRD samik samik; Nita Kusumawati; Maria Monica Sianita; Dina Kartika Maharani; Amalia Putri Purnamasari; Mukhlash Imaduddin; M Iqbal Al Ghifari
Unesa Journal of Chemistry Vol 11 No 3 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

Rice husk ash is a material that mostly contains silica (SiO2). Silica can be used as a raw material for various industries. This research is an experimental study, covering the synthesis of rice husk ash with various calcination temperatures, namely 800 oC, 900 oC, and 1000 oC. The purpose of this study was to identify the type of solid and crystalline phases of RHA so that the results of this study could be used as a basis for further research on the use of RHA. The results of the synthesis produced four types of samples, namely samples calcined at a temperature of 800 oC (coded S-800), calcined at 900 oC was gray (S-900 A), calcined at 900 oC was white (S-900 P), and samples were calcined at a temperature of 1000 oC (S-1000). Characterization using X-Ray Diffraction (XRD) showed that all samples included crystalline solids with the tridymite crystal phase and cristobalite were detected in samples S-800, S-900 P, S-900 A, and S-1000. Cristobalite and tridymite are silica mineral polymorphs with the same chemical formula as quartz, SiO2, but have different crystal structures. The percentage of crystallinity of the sample was calculated by comparing the sample which has the highest peak intensity (S-1000). The crystallinity results for S-1000, S-900 P, and S-900 A were 100%, 96%, 79%, and 32%. The lower the calcination temperature, the smaller the percentage of crystallinity. Keywords: rice husk ash, calcined, silica, XRD, crystalline solid

PEMBUATAN ZEOLIT TERMODIFIKASI HEKSADESILTRIMETILAMONIUM (HDTMA) UNTUK APLIKASI PUPUK N SLOW RELEASE Tidora Juliana Worisio; Dina Kartika Maharani
Unesa Journal of Chemistry Vol 12 No 1 (2023)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

This study aims to determine the release of nitrogen levels in fertilizer samples by varying the ratio of zeolite volume to cationic surfactant mass and knowing the chemical characterization of FTIR. In this study natural zeolite and hexadecyltrimethylammonium (HDTMA) were used as the main ingredients. Fertilizer production in this study by activating natural zeolite using 1M HCl then added surfactant HDTMA 0.05M with a ratio of 1: 1, 1: 3, 1: 5, then added a 0.05M NaNO3 solution as a nitrogen source which then tested slow release on land for 7 days. The results of the chemical characterization of FTIR showed a band shift in activated zeolite, HDTMA modified zeolite (1: 1), and ZMS (I). The release of nitrogen levels on day 0 of ZMS (I) was smaller than 0,00059% but on day 7 the nitrogen release was smaller in zeolite activated by 1.3339% compared to ZMS (I) which on day 7 was 1.625% .

GREEN SYNTHESIS, CHARACTERIZATION, PHOTOCATALYTIC ACTIVITY OF ZnO/TiO2 NANOCOMPOSITE FROM Carica papaya LEAVES Safira Salsabilla; Dina Kartika Maharani
Jurnal Kimia Riset Vol. 8 No. 1 (2023): June
Publisher : Universitas Airlangga, Campus C Mulyorejo, Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v8i1.43813

This study aims to synthesize a ZnO/TiO2 (ZT) nanocomposite from Carica papaya leaf extract and evaluate its photocatalytic activity. The ZT nanocomposite was prepared using the sol-gel method with ZnO/TiO2 4-gram (ZT4) concentration variations and ZnO/TiO2 6-gram (ZT6). Methylene Blue (MB) was used as a model dye to test its photocatalytic properties. The trend for most activity is shown by ZT4 UV light 40 mg and ZT6 UV light (60 mg), which is 87%. Characterization of ZnO/TiO2 (ZT) nanocomposite using FTIR and XRD The ZT4 nanocomposite had an average crystallite size of approximately 12 nm and crystallinity percentage of 92%, whereas the ZT6 nanocomposite had an average crystallite size of approximately 6 nm and crystallinity percentage of 97%. FTIR resulted in some group C=C stretching alkene, C-H stretching vibrations of an aromatic aldehyde, and O-H stretching of alcohols and Zn-Ti-O in the fingerprint region 393.48 cm-1 to 987.55 cm-1 for ZT4 and in the fingerprint region 401.19 cm-1 to 864.11 cm-1 for ZT6.

Pemanfaatan Daun Mangga Sebagai Pewarna Alam Batik Tulis Khas Desa Marengan Laok Kabupaten Sumenep I Kartika Maharani, Dina; Nita Kusumawati; Maria Monica
Jurnal ABDI: Media Pengabdian Kepada Masyarakat Vol. 10 No. 1 (2024): JURNAL ABDI : Media Pengabdian Kepada masyarakat
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/abdi.v10i1.27943

Batik Madura merupakan salah satu batik popular di Indonesia tidak terkecuali batik Sumenep yang merupakan daerah paling Timur Pulau Madura. Batik Sumenep salah satunya berkembang di desa Marengan Laok kecamatan Kalianget kabupaten Sumenep. Motif desain batik tulis yang dikembangkan di desa tersebut adalah motif topeng sehingga disebut batik topengan. Pengembangan proses produksi batik tulis meliputi proses pewarnaan dan desain motif merupakan faktor penting untuk meningkatkan penjualan dan kapasitas produksi, sehingga pelatihan dan pendampingan terkait proses pewarnaan dengan pewarna alam perlu dilakukan. Pelatihan yang dilakukan terhadap kelompok mitra pengrajin batik desa Marengan Laok meliputi pelatihan pembuatan pewarna alam dari daun Mangga yang melimpah di kabupaten Sumenep.

Co-Authors , MIFTAHUSSYAHRO Alya, Aiza Amalia Putri Purnamasari Amartia Cindi Oktaviani Aminuyati Amos Tigor Tobing Danu Erlangga, Muhammad DIAN SAVITRI DWI YUNIANTO, ANGGA Isaloka, Ilo Kayla Naulia Fadhila Khulud Rihadatul 'Aisy Kusumawati Dwiningsih M Iqbal Al Ghifari Maria Monica Maria Monica Sianita Muchlis Muchlis Mukhlash Imaduddin Nita Kusumawati NUR ROFI, SITI Qurrotul Ayun, Qurrotul Rahma Nurisnaini Rieza Mahendra Kusuma Rizka Dwi Safitri Rusly Hidayah Safira Salsabilla Samik Samik Tidora Juliana Worisio TUTIK ALAWIYAH, SITI Wardah, Dewi Ithriyatul Weka Firda Rizki Nurzulla WINDAYANI PUTRI, AGUSTIN

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