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Indriana Kartini
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PEMBUATAN CONCRETE ZEOLIT-LEMPUNG UNTUK PERVAPORASI CAMPURAN ETANOL/AIR TANPA PEMANASAN Wisnu Adhi Putra, I Made; Arryanto, Yateman; Kartini, Indriana
Prosiding Seminar Nasional MIPA 2012: PROSIDING SEMINAR NASIONAL MIPA UNDIKSHA 2012
Publisher : Prosiding Seminar Nasional MIPA

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

Abstract

ABSTRACTPreparation of zeolite-clay concrete for new ethanol/water pervaporation without heating has been carried out. Concrete was made by mixing natural zeolite, portland cement, natural clay and distilled water in porcelain disk. The mixture was manually stirred until homogenous suspension obtained. The suspension formed was then placed in the mold and allowed to dry in open air for 48 hours. The mass of natural zeolite was varied from 10, 12.5, 15, 17.5, and 20 g meanwhile the mass of natural clay was varied from 0, 1.25, 2.5, 3.75, and 5 g. The mass of portland cement was fixed in the value of 10 g. The concrete was characterized by infrared spectrophotometer (IR) and X-ray diffraction (XRD). Material testing machine was used to determine the compressive strength of the concrete agreeable with decided ASTM C349-08 standard.Based on preparation of zeolite-clay concrete, it was found that the increase of the natural zeolite mass from 15 to 20 g caused fracture to the concrete, but water adsorption percentage increased from 27.7% to 35.2%. Meanwhile, the higher the mass of natural clay, the greater the compressive strength of concrete from 130.3 MPa to 179.9 MPa and water adsorption percentage from 28.9% to 32.3%. The adsorption-desorption data showed that the water was faster to adsorb into the concrete than ethanol, whereas the desorption rate of concrete with respect to ethanol was greater than that to water. The difference on desorption rate was then used to separate ethanol/water mixture through pervaporation without heating. Pervaporation test using the concretes resulted in the increase of ethanol feed concentration from 60%, 70%, 80%, and 90% to 82.9%, 82.5%, 87.8%, and 93.7% respectively.Keywords: concrete, compressive strength, adsorption-desorption, ethanol/water mixture, pervaporation.
PENGUATAN KONEKTIVITAS LINTAS BATAS DALAM KERJA SAMA EKONOMI SUBREGIONAL Kartini, Indriana; Irewati, Awani; Rahman, Agus R; Pudjiastuti, Tri Nuke; Luhulima, CPF.; Dewi, Rosita; Raharjo, Sandy Nur Ikfal; Nufus, Hayati
Jurnal Penelitian Politik Vol 17, No 1 (2020): Perang dan Damai : Situasi Politik Internasional di Era Ketidakpastian
Publisher : Pusat Penelitian Politik

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (950.408 KB) | DOI: 10.14203/jpp.v17i1.859

Abstract

Konektivitas yang dibangun negara, baik dalam lingkup bilateral, regional, maupun global berkelindan satu sama lain. Misalnya, kerja sama subregional berbasis konektivitas lintas batas yang tengah dibangun dalam kerangka IMT-GT, BIMP-EAGA, dan TIA-GT akan mendorong dan menguatkan sebuah kerja sama regional, seperti ASEAN Community, sesuai dengan Master Plan on ASEAN Connectivity. Studi ini difokuskan pada tiga hal, yakni  pertama, capaian dan tantangan pembangunan konektivitas lintas batas (fisik, kelembagaan, dan antarmasyarakat) melalui kerja sama ekonomi subregional; kedua, strategi penguatan konektivitas antarwilayah pertumbuhan subregional untuk mendukung konektivitas ASEAN; ketiga, strategi pemanfaatan konektivitas ASEAN berbasis kerja sama ekonomi subregional bagi Indonesia. Dengan menggunakan metode penelitian kualitiatif yang bersifat eksploratif analitis, studi ini menemukan bahwa keterlibatan Indonesia dalam beberapa kerja sama ekonomi subregional membawa dampak positif bagi Indonesia, baik secara ekonomi, sosial budaya, maupun pertahanan keamanan. Namun, capaian dari beberapa kerja sama subregional ini lebih terlihat di kawasan Indonesia bagian barat dan tengah dibandingkan bagian timur. Tantangan ini yang harus dapat diselesaikan oleh pemerintah Indonesia untuk dapat mengoptimalkan pemanfaatan kerja sama subregional di semua kawasan di Indonesia dengan mendorong peran aktif pemerintah-pemerintah daerah untuk terlibat dalam kerja sama subregional yang melibatkan daerahnya. Kata kunci: konektivitas, lintas batas, subregional, IMT-GT, BIMP-EAGA, TIA-GT
Effect of Annealing and Etching Times on Anatase TiO2 Hollow Sphere Rakhman, Khusna Arif; Aprilita, Nurul Hidayat; Kartini, Indriana
Molekul Vol 18 No 2 (2023)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2023.18.2.7480

Abstract

The development of high-efficiency photocatalysts plays an important role in the application of solar energy conversion. Titanium dioxide (TiO2) with an anatase crystalline phase is well-known as semiconductor thin layers for solar cells. This work has constructed a novel TiO2 hollow sphere (HST) in a 2-step synthesis. The first step is coating the SiO2 template with TiO2 to build a core-shell of SiO2@TiO2 (CSST). The second step is etching via sonication to elute the SiO2 from CSST and construct the HST. The annealing of CSST for 1 to 6 hours and etching for 1 to 7 hours has resulted in the HST with different crystallite sizes and microstrains. The HST of ~90 nm has been fabricated with crystallite size of 9.53 to 20.54 nm and microstrain from 0.34 to 3.42. It was found that the optimum crystallite size and microstrain of HST obtained via annealing the CSST for 2 hours and etching for 5 hours has the best photooxidation of I- under UV irradiation. The optimum crystallite size and microstrain of HST via annealing and etching times can be recommended for the future of solar cell fabrication and applications.
Preparation of Mo-impregnated mordenite catalysts for the conversion of refined kernel palm oil into bioavtur Trisunaryanti, Wega; Triyono; Wijaya, Karna; Kartini, Indriana; Purwono, Suryo; Rodiansono; Mara, Ady; Budiyansah, Amsal
Communications in Science and Technology Vol 8 No 2 (2023)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.8.2.2023.1288

Abstract

The research aims to study the effects of Mo metal embedded on H-Mordenite on its activity and selectivity of hydrodeoxygenation (HDO) for Refined Palm Kernel Oil (RPKO) into bioavtur. The RPKO was obtained from the results of degumming and bleaching process of palm kernel oil and then analyzed using Gas Chromatography-Mass Spectrometer (GC-MS). The impregnation of Mo metal was carried out by spraying using an ammonium heptamolybdate precursor solution ((NH4)6Mo7O24•4H2O) with an initial Mo metal content of 5, 10, and 15wt% of H-Mordenite to produce 5-Mo/Mor, 10-Mo/Mor, and 15-Mo/Mor. The 15-Mo/Mor catalyst produced the highest amount of liquid product (46.08wt%) with bioavtur yield of 43.19wt%. The usability test showed that 15-Mo/Mor catalyst still produced a good performance after three times of use in the RPKO feed HDO with the second and third run test liquid product of 34.82 and 46.14wt% respectively with bioavtur yield of 32.58 and 43.45wt%, respectively.
The Properties and Activity of TiO2-based Nanorods as an Anti-Fouling Agent and a Photocatalyst Wahyuni, Sri; Kartini, Indriana; Kadarwati, Sri
Bulletin of Chemical Reaction Engineering & Catalysis 2024: BCREC Volume 19 Issue 1 Year 2024 (April 2024)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20074

Abstract

The properties and activity of TiO2-based nanorods as an antifouling agent and a photocatalyst for the catalytic degradation of methylene blue (MB) have been investigated. A modification of TiO2 with SiO2 was first carried out to enlarge the surface area. In order to enhance the TiO­2 photo response to the visible light region, a further modification of TiO2-SiO2 (TS) composites with polyaniline (PANI) was also conducted. The nanorod TiO2 exhibited an anatase structure based on the diffraction patterns. The TEM images showed that some TiO2 molecules were attached around SiO2 with a random orientation. The TiO2-SiO2-PANI (TS-PANI) exhibited the largest specific surface area (SBET) of about 256.85 m2/g. The profile on the AFM images of the composites showed that the nano-roughness of the coatings was confirmed. The photocatalytic activity was evaluated through the decomposition of MB both on the powder and the coated composites. The photocatalytic activity on the coatings was verified due to further application as anti-fouling coatings involving photocatalytic mechanism. The decomposition of MB using TS-PANI powder and TS-PANI coating composites was 89.5% and 90.2 %, respectively, with the irradiation time on the coatings was 20 min longer. The anti-fouling activity through the photocatalytic mechanism and nano-roughness surface was confirmed by the inhibition of barnacle growth on the teakwood surface immersed for two months in the sea.
Beach Sand-derived Mesoporous Silica by Hydrothermal Process for Hydrocracking Waste Coconut Oil to Biofuel Salamah, Siti; Hanum, Farrah Fadhillah; Trisunaryati, Wega; Kartini, Indriana; Purwono, Suryo
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 8, No 3 (2023): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v8i3.76598

Abstract

Hydrocracking, a key process for converting waste coconut oil into biofuel, requires efficient catalysts. This study investigates the synthesis of mesoporous silica catalysts using a hydrothermal process. Dodecyl amine, sourced from beach sand, serves as a template. The hydrothermal synthesis involved durations (12, 15, 18, 21, and 24 hours) and dodecyl amine concentrations (0.25 M, 0.5 M, 0.1 M), conducted at 40 °C for 30 minutes. The synthesized catalysts were then characterized for their surface area, pore volume, and diameter. Among the synthesized samples, those treated for 15 hours displayed optimal total acidity at 0.88 mmol/g. The catalysts synthesized with a dodecyl amine concentration of 0.025 M exhibited superior characteristics, including a specific surface area of 233 m²/g, a pore volume of 0.47 cc/g, and an average pore diameter of 2.10 nm. These findings underscore the efficacy of mesoporous silica catalysts in hydrocracking, particularly in converting large hydrocarbon molecules into smaller, more valuable biofuel molecules. Comparative analysis with similar research highlights the significance of these findings in the field of sustainable energy. The optimal catalyst conditions yielded a liquid fraction of over 70% for 0.25 M dodecyl amine. This efficiency in converting waste coconut oil into biofuel signifies the potential of mesoporous silica catalysts in advancing environmentally friendly energy sources. This research contributes to the growing knowledge of renewable energy, offering promising avenues for developing sustainable and eco-friendly energy solutions.
Study of Structural Properties of Mesoporous Carbon From Fructose with Zinc Borosilicate Activator Setianingsih, Tutik; Kartini, Indriana; Arryanto, Yateman
The Journal of Pure and Applied Chemistry Research Vol. 3 No. 3 (2014)
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (446.981 KB) | DOI: 10.21776/ub.jpacr.%y.03.03.173

Abstract

Structural properties, including pore structure, functional group of carbon surface, and crystal structure of carbon built by zinc borosilicate (ZBS) and ZnCl2 (Z) have been investigated in this work. Physically, ZBS and ZnCl2 may act as template of carbon, whereas the Zn(II) cation act as chemical activator of carbonization. All precursors of ZBS (silicagel, boric acid, and ZnCl2) may act as catalysts of caramelization. The caramelization was conducted hydrothermally at 85oC and thermally 130oC. The carbonization was conducted at 450oC. The resulted carbons were washed by using HF 48% solution, 1M HCl solution, and aquadest respectively. The solid products were characterized by using nitrogen gas adsorption, infrared spectrophotometry, X-ray diffraction, and Transmition Electron Microscopy. Result of research showed that ZBS built larger mesopore volume, larger pore domination of pore size, more hydrophobic carbon, and more amorf than ZnCl2.
PENGOLAHAN LIMBAH STIROFOAM MENJADI MODEL MOLEKUL 3D SEBAGAI BASIS PENGEMBANGAN EKONOMI KREATIF MASYARAKAT Hanifah, Fitriana Nur; Widianingtyas, Hanifah Nur; Kartini, Indriana; Kartika, Tamara
Envirous Vol. 2 No. 2 (2022): Jurnal Envirous
Publisher : UPN "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/envirous.v2i2.109

Abstract

Indonesia merupakan kontributor pencemaran limbah plastik terbesar kedua duniabagi samudra yang didominasi oleh plastik stirofoam sehingga perlu dilakukanpengolahan terhadap limbah stirofoam. Sementara itu, terdapat kebutuhan terhadapkit model molekul 3D berbahan plastik dengan harga terjangkau. Penelitian inibertujuan mengetahui cara pengolahan limbah stirofoam menjadi kit modelmolekul 3D dan pengaruhnya terhadap penurunan pencemaran lingkungan sertaimplementasinya pada industri rumahan masyarakat. Berdasarkan kajian pustakadan eksperimen, stirofoam dapat didaur ulang menggunakan aseton menjadi plastiksebagai bahan pembentuk kit ini. Berdasarkan survei pasar, produk ini memilikipotensi pasar yang tinggi. Proses produksinya melibatkan masyarakat tunakarya dan pemulung. Sebanyak 37,5 kg stirofoam dapat diolah menjadi 75 kit dengan estimasi pekerja lima orang untuk sekali produksi dengan BEP sebesar 71 kit(jangka waktu 1 bulan). Laba bersih yang diperoleh sebesar Rp2.437.250,00 perbulan. Setiap tahun penjualan produk ini ditingkatkan sebesar 10%. Usaha inidinyatakan layak dengan NPV Rp956.299,30 dan IRR 13,03%.
Toward eco-friendly dye-sensitized solar cells: Developing chitosan-based electrolytes with conducting polymers and ionic liquids Hatmanto, Adhi Dwi; Puspitaningrum, Indah; Christina Tefa, Yoan Nikita; Santosa, Sri Juari; Kartini, Indriana
International Journal of Renewable Energy Development Vol 14, No 4 (2025): July 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61085

Abstract

Optimization of chitosan-based gel electrolytes modified with conducting polymers and ionic liquids for dye-sensitized solar cells (DSSC) has been done to improve its electrochemical activity. The effects of iodide salts, 1-propyl-3-methylimidazolium iodide (PMII), and polyaniline incorporation on the electrochemical properties of chitosan-based electrolyte, as well as its performance as a quasi-solid electrolyte in DSSC, were systematically investigated. A study on the effect of different iodide salts on the electrochemical properties of the electrolyte was conducted by employing various iodide salts (lithium iodide, sodium iodide, potassium iodide, or cesium iodide). Electrolytes with various amounts of PMII and polyaniline were also prepared. X-ray diffraction (XRD) and Fourier transform-infrared (FTIR) analysis were conducted to study the effect of iodide salts, PMII, and polyaniline on the change in intermolecular interaction of the chitosan matrix. The ionic conductivity and the redox activity of the chitosan-based electrolyte were respectively evaluated using conductometry and cyclic voltammetry analysis. It is found that the larger cation size of the iodide salts and a higher amount of PMII resulted in both higher intensity of the redox peak current and conductivity of the electrolyte. Those two characteristics increase with the presence of polyaniline, but the low transparency of this polyaniline-based electrolyte lowers the solar cell’s efficiency. The highest performance DSSC utilizing a chitosan/KI-PMII based electrolyte resulted in a Voc of 0.402 V, Jsc of 0.335 mA/cm², fill factor (FF) of 0.432, and an overall power conversion efficiency (PCE) of 0.058%. This efficiency is approximately one-third that of the conventional liquid electrolyte-based DSSC. The optimized chitosan-based electrolyte offers promising performance in replacing the low-stability liquid electrolyte-based DSSC.
Co-Authors Ady Mara, Ady Agus R Rahman, Agus R Ahmad Budi Junaidi Akhmad Herman Yuwono Alfian Ferdiansyah Anak Agung Istri Sri Wiadnyani Awani Irewati, Awani Badrul Munir, Badrul Bambang Rusdiarso Budiyansah, Amsal Candra Purnawan Christina Tefa, Yoan Nikita Eko Sugiharto Hanifah, Fitriana Nur Hanum, Farrah Fadhillah Hatmanto, Adhi Dwi Hayati Nufus, Hayati I Made Wisnu Adhi Putra Karna Wijaya Kartika, Tamara Khusna Arif Rakhman, Khusna Arif Luhulima, CPF. Narsito Narsito Nurul Hidayat Apriliata Nurul Hidayat Aprilita Pujianto, Togo Hadi Puspitaningrum, Indah Rodiansono Sandy Nur Ikfal Raharjo, Sandy Nur Ikfal Sayekti Wahyuningsih Siti Salamah Sofyan, Norifon Sri Juari Santosa Sri Kadarwati Sri Wahyuni Suryo Purwono Tri Nuke Pudjiastuti, Tri Nuke Triyono Tutik Setianingsih Wega Trisunaryanti Wega Trisunaryati, Wega Widianingtyas, Hanifah Nur Yateman Arryanto