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All Journal JURNAL KIMIA SAINS DAN APLIKASI Alchemy Jurnal Penelitian Kimia ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry Jurnal Abdi Masyarakat Indonesia Jurnal Abdimas Kartika Wijayakusuma
Dian Maruto Widjonarko
Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Sebelas Maret University Surakarta
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Energy Engineering Environmental Science Materials Science & Nanotechnology Public Health Social Sciences Other

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PREPARATION AND CHARACTERIZATION OF THE MONOMETAL CATALYST Mo/ USY Nugrahaningtyas, Khoirina Dwi; Trisunaryanti, Wega; Triyono, Triyono; Nuryono, Nuryono; Widjonarko, Dian Maruto; Mulyani, Mulyani
Alchemy Jurnal Penelitian Kimia Vol 8, No 1 (2012)
Publisher : Alchemy Jurnal Penelitian Kimia

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Abstract

This research deals with preparing and characterizing the metal based-catalyst of Mo supported on Ultra Stable Y-zeolite (USY) and, is aimed to ascertain the best produced catalyst for hydrotreatment reaction in standpoint of its capabilities on removing the unwanted-heteroatom compounds.Procedure of catalyst treatment was preparation, activation and characterization. Monometal catalyst Mo/USY was prepared under variation concentrations of salt metal precursor (concentrations), i.e 2, 6, 10 and 14% wt. The activation steps were carried out by calcination, oxidation, and reduction. Characterization of catalysts were determined by data of XRD, AAS, acidity, surface area and its porosity. The result shows that these catalysts have several good characters that supporting their usefulness in hydrotreatment-catalytic reaction. In addition, catalyst Mo10/USY performs many ideal criteria as the best functional catalyst.
ALUMINASI FELDSPAR PADA TANAH ABU VULKANIK (TAV) DENGAN LARUTAN ALUMINIUM KLORIDA HEKSAHIDRAT Heraldy, Eddy; Widjonarko, Dian Maruto; Saputro, Sigit Wiwiet
Alchemy Jurnal Penelitian Kimia Vol 3, No 2 (2004)
Publisher : Alchemy Jurnal Penelitian Kimia

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Abstract

Telah dilakukan aluminasi feldspar pada Tanah Abu Vulkanik (TAV) gunung Lawu dengan menggunakan larutan aluminium klorida heksahidrat 0,1 M. Aluminasi dilakukan pada suhu 30, 50, 70 dan 90oC masing-masing selama 6 jam. Perlakuan kalsinasi terhadap sampel sebelum dan sesudah aluminasi dilakukan selama 6 jam pada 550oC.Hasil penelitian menunjukkan bahwa proses aluminasi feldspar pada suhu 30, 50, 70 dan 90oC tidak cukup berpengaruh. Difraktogram menunjukkan bahwa struktur sampel pada suhu aluminasi 30oC dan 90oC masih tetap di pertahankan sebagai mineral feldspar dengan kristalinnitas yang semakin meningkat.
Pengaruh Bentonit terhadap Pembentukan Fasa Polimorf dan Sifat Termal Membran Hibrida Poliviniliden Fluorida/Bentonit Edi Pramono; Rosid Eka Mustofa; Ozi Adi Saputra; Yulianto Adi Nugroho; Deana Wahyunigrum; Cynthia Linaya Radiman; Sayekti Wahyuningsih; Teguh Endah Saraswati; Sentot Budi Rahardjo; Witri Wahyu Lestari; Dian Maruto Widjonarko; Ari Handono Ramelan
ALCHEMY Jurnal Penelitian Kimia Vol 17, No 2 (2021): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.17.2.46136.177-184

Abstract

Kajian struktur dan degradasi termal pada membran hibrida poliviniliden fluorida (PVDF)/lempung bentonit (BNT) telah dilakukan. Penelitian ini bertujuan mengetahui pengaruh penambahan BNT terhadap pembentukan fasa PVDF dan sifat termalnya. Membran hibrida PVDF/lempung BNT dibuat dengan metode inversi fasa. Membran yang dihasilkan dikarakterisasi dengan attenuated total reflectance fourier transform infrared (ATR-FTIR), x-ray diffraction (XRD), dan differential scanning calorimetry (DSC). Hasil penelitian menunjukkan membran PVDF/BNT memiliki struktur polimorf PVDF fasa α dan β yang terkonfirmasi dari data FTIR dan XRD. Data DSC menunjukkan penurunan nilai titik leleh (Tm) dengan penambahan BNT, dan dengan rentang suhu pelelehan yang lebih kecil. Kristalisasi PVDF terjadi secara isothermal dan adanya BNT menghasilkan titik kristalisasi (Tc) pada suhu yang lebih tinggi dibandingkan membran PVDF murni. Analisis termal dengan DSC memberikan informasi komprehensif pelelehan dan kristalisasi dari polimorf PVDF pada matriks membran.Effect of Bentonite toward Polymorph Phase Formation and Thermal Properties of Polyvinylidene Fluoride/Bentonite Hybrid Membranes. The study of the structure and thermal properties of PVDF/bentonite (BNT) hybrid membranes has been carried out. This study aims to determine the effect of BNT addition on the phase formation and thermal properties of the PVDF. In this study, PVDF/BNT hybrid membranes were prepared through the phase inversion method. The resulting membrane was characterized by Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR), x-ray diffraction (XRD), and differential scanning calorimetry (DSC). The results showed that the PVDF/BNT membrane has a PVDF polymorph structure with α and β phases confirmed by FTIR and XRD data. The DSC data showed that the addition of BNT decrease of the melting point (Tm) and with a smaller melting temperature range. PVDF polymorph crystallization occurs isothermally and the presence of BNT produces a crystallization point (Tc) at a higher temperature than pristine PVDF membrane. Thermal analysis with DSC provides comprehensive information on melting and crystallization of PVDF polymorphs in the membrane matrix.
KAJIAN AKTIVASI H2SO4 TERHADAP PROSES PEMILARAN Al2O3 PADA LEMPUNG ALAM Khoirina Dwi Nugrahaningtyas; Dian Maruto Widjonarko; Daryani Daryani; Yunita Haryanti
ALCHEMY Jurnal Penelitian Kimia Vol 12, No 2 (2016): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.12.2.1312.190-203

Abstract

Telah dilakukan penelitian tentang lempung alam (bentonit) yang diaktivasi dengan berbagai variasi konsentrasi H2SO4, dan dengan proses interkalasi menggunakan larutan Al2O3.H2O. Tujuan dari penelitian ini adalah untuk menentukan konsentrasi optimum untuk aktivasi lempung, berdasarkan karakter persentase montmorillonite dan keasaman total. Hal ini juga didukung oleh karakterisasi setelah proses interkalasi, yaitu karakter luas permukaan spesifik, volume pori total, radius pori rata-rata dan kandungan aluminium. Analisis persentase-Montmorilonit dilakukan dengan menggunakan difraksi sinar X; keasaman total ditentukan secara gravimetri; luas permukaan spesifik, volume pori total, dan jari-jari pori rata-rata diukur dengan Surface Area Analyzer NOVA dan kandungan aluminium ditentukan oleh Analisis Aktivasi Neutron.Hasil penelitian menunjukkan bahwa aktivasi optimum pada konsentrasi H2SO4 1,5 M mempunyai persentase montmorillonite optimum (91.335%) dan nilai keasaman meningkat 193.955% dari nilai keasaman bentonit alam. Karakter fisik dan kimia setelah interkalasi juga menunjukkan bahwa terjadi peningkatan kadar aluminium (57,540%), luas permukaan spesifik (150,586%), volume total pori (73,236%) dan keasaman Total (203,504%) dari bentonit alam. Rerata jejari pori mengalami penurunan 10,274% setelah aktivasi dan penurunan 30,868% setelah proses interkalasi.
Phosphonate Modified Silica for Adsorption of Co(II), Ni(II), Cu(II), and Zn(II) Dian Maruto Widjonarko; Jumina Jumina; Indriana Kartini; Nuryono Nuryono
Indonesian Journal of Chemistry Vol 14, No 2 (2014)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (362.075 KB) | DOI: 10.22146/ijc.21251

Abstract

A new phosphonate modified silica (PMS) has been investigated for adsorption of Co(II), Ni(II), Cu(II), and Zn(II) in aqueous solution. The adsorbent was modified of silica by immobilizing aminoethyl dihydrogen phosphate (AEPH2) on 1,4-dibromobutane grafted silica. The physicochemical of the adsorbent was investigated using Fourier Transform Infra-red (FTIR) spectroscopy, X-ray Fluorescence (XRF), and N2 gas adsorption/desorption. The adsorption study was carried out in a batch system by mixing solution of metal ions at various pHs, contact times, and initial metal ion concentrations. The unadsorbed metals were determined by Flame Atomic Absorption Spectrophotometry (FAAS). Result of characterization showed that PMS has been successfully prepared. The product contained 45.99% (w/w) silica and 1.33% (w/w) phosphorous with surface area, pore volume, and pore size of 115.3 m2g-1; 0.7578 mLg-1; and 131.44 Å, respectively. Adsorption of metal ions on PMS occurred quite fast, less than 30 min. Modification of phosphonate on silica increased the adsorption capability, up to 8 times higher than that of unmodified silica, depending on metal ion type and pH solution. The capacity order of the metals adsorption was Cu(II)>Co(II)>Ni(II)>Zn(II). Based on the adsorption characteristic, the adsorbent is promising to be applied as a material for solid phase extraction of transition metal ions.
PREPARATION AND CHARACTERIZATION THE NON-SULFIDED METAL CATALYST: Ni/USY and NiMo/USY Khoirina Dwi Nugrahaningtyas; Wega Trisunaryanti; Triyono Triyono; Nuryono Nuryono; Dian Maruto Widjonarko; Ari Yusnani; Mulyani Mulyani
Indonesian Journal of Chemistry Vol 9, No 2 (2009)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (331.472 KB) | DOI: 10.22146/ijc.21526

Abstract

The two-new catalysts had been prepared by using the impregnation method according to Nugrahaningtyas [6] and Li [4]. One catalyst is of Nickel (Ni), supported on Ultra Stable Zeolite Y (USY), whereas the other one is NiMo supported on same supporting agent. These new catalysts are expected to be more effective when applied on the hydrotreatment reaction in standpoint of its capabilities on removing the unwanted-heteroatom. Characterization those two types of catalysts then carried out by using the criteria of acidity, porosity and, metal content. The result shows that these non-sulfide catalysts have several good characters that supporting their usefulness in hydrotreatment-catalytic reaction. In addition, catalyst NiMo/USY - 1 performs many ideal criteria as the best functional catalyst.
Sintesis Carbon Nanofoam dan Karakteristiknya Nuryah Muchlisha; Dian Maruto Widjonarko; Teguh Endah Saraswati
ALCHEMY Jurnal Penelitian Kimia Vol 19, No 1 (2023): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.19.1.64499.108-122

Abstract

Karbon memiliki kemampuan untuk membuat jaringan ikatan hibridisasi sp, sp‒sp2, sp2, sp3, dan sp2‒sp3,sehingga karbon terdapat dalam banyak bentuk alotrop seperti grafit, diamond, graphene, nanofiber, nanofoam, dan nanotube. Carbon nanofoam (CNF) terbentuk dari atom karbon yang terikat secara sp2 dan sp3. CNF memiliki struktur sel terbuka yang saling berhubungan, densitas yang sangat rendah, stabilitas termal yang tinggi, dan porositas yang tinggi. CNF dapat diperoleh dengan menggunakan berbagai metode seperti chemical vapor depositon, laser ablsasi, arc-discharge, dan pirolisis. Sintesis dengan berbagai jenis sumber karbon dan keadaan eksperimen menghasilkan material yang memiliki berbagai ukuran, luas permukaan, dan strukturnya. Struktur CNF terdiri dari dua jenis berdasarkan pola tepi strukturnya yaitu zigzag dan armchair. Hasil karakterisasinya menunjukkan bahwa CNF lebih banyak mengandung karbon dengan hibridisasi sp2 dengan struktur yang berinterkoneksi satu sama lain dan memiliki densitas yang sangat rendah. Selain itu, material ini juga memiliki pori dalam ukuran mesopori dan luas permukaan yang tinggi. Sifat unik yang dimiliki oleh CNF berpotensi diaplikasikan dalam berbagai bidang seperti filter, superkapasitor, dan energy storage. Synthesis of Carbon Nanofoam and Its Characteristics. Carbon can create sp, sp‒sp2, sp2, sp3, and sp2‒sp3 hybridized bond networks, which make carbon in many allotropes forms such as graphite, diamond, graphene, nanofiber, nanofoam, and nanotubes. Carbon nanofoam  (CNF) is formed by sp2 and sp3 bonded carbon atoms. CNF has an interconnected open-cell structure, very low density, high thermal stability, and high porosity. CNF is obtained using several methods, such as laser ablation, arc-discharge, chemical vapor deposition, and pyrolysis. Synthesis with various types of carbon sources and experimental conditions resulted in materials having various sizes, surface areas, and structures. The structure of CNF consists of two edge pattern types, including zigzag and armchair. The characterization results show that CNF contains more interconnected carbon with sp2 hybridization and has a very low density. In addition, this material also has pores in the mesoporous size and high surface area. The unique properties of CNF provide potential applications in various fields, such as filters, supercapacitors, and energy storage.
The Paraffin Cracking Reaction with NiMo/Active Natural Zeolite Catalyst: The Effect Temperature on Catalytic Activity Khoirina Dwi Nugrahaningtyas; Eko Cahyono; Dian Maruto Widjonarko
ALCHEMY Jurnal Penelitian Kimia Vol 11, No 2 (2015): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.11.2.712.111-126

Abstract

This research deals with the study of the paraffin cracking reaction with termal reaction, active natural zeolite (ZAA) and NiMo / active natural zeolite (ZAA) catalyst. Temperature variation was done in order to study the optimum temperature of paraffin cracking reactions. Paraffin cracking reaction carried out at temperatures of 200 - 400 °C and a hydrogen flow rate of 30 mL / min. Cracking products obtained, and then analyzed by gas chromatography (GC) and gas chromatography-mass spectrometry(GCMS). Catalyst activity (%) was defined as the amount of lighter fractions/the amount of feed (paraffin) (%). The results showed that the catalyst NiMo/ZAA has the highest activity (31.33 %) at the cracking reaction temperature of 300 ºC
Conversion of Wood Waste to be a Source of Alternative Liquid Fuel Using Low Temperature Pyrolysis Method Gesyth Mutiara Hikhmah Al Ichsan; Khoirina Dwi Nugrahaningtiyas; Dian Maruto Widjonarko; Fitria Rahmawati; Witri Wahyu Lestari
Jurnal Kimia Sains dan Aplikasi Vol 22, No 1 (2019): volume 22 Issue 1 Year 2019
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1837.269 KB) | DOI: 10.14710/jksa.22.1.7-10

Abstract

Conversion of wood waste into bio-oil with low temperature pyrolysis method has been successfully carried out using tubular transport reactors. Pyrolysis carried out at temperatures of 250-300°C without using N2 gas. Bio-oil purified by a fractionation distillation method to remove water and light fraction compounds. The materials obtained from different types of wood waste, namely: Randu wood (Ceiba pentandra), Sengon wood (Paraserianthes falcataria), Coconut wood (Cocos nucifera), Bangkirei wood (Shorea laevis Ridl), Kruing wood (Dipterocarpus) and Meranti wood (Shorea leprosula). Bio-oil products are analyzed for their properties and characteristics, namely the nature of density, acidity, high heat value (HHV), and elements contained in bio-oil such as carbon, nitrogen and sulfur content based on SNI procedures, while bio-oil chemical compositions are investigated using Gas Chromatography Mass Spectroscopy (GC-MS). The maximum yield of bio-oil products occurs at 300°C by 40%. Bio-oil purification by fractional distillation method can produce purity of 16-31% wt. The characterization results of the chemical content of bio-oil showed that bio-oil of methyl formate, 2,6-dimetoxy phenol, 1,2,3 trimethoxy benzene, levoglucosan, 2,4-hexadienedioic acid and 1,2- benzenediol.
Peningkatan Kualitas Produksi Ecoprint Corak Pewarna Alam melalui Pendampingan Proses Teknik Pewarnaan di UMKM Ecorilife.Id Wahyuningsih, Sayekti; Rahardjo, Sentot Budi; Lestar, Witri Wahyu; Saraswati, Teguh Endah; Widjonarko, Dian Maruto; Pramono, Edi; Naufal, Widyan Muhammad; Faradilla, Radianita
Jurnal Abdi Masyarakat Indonesia Vol 5 No 1 (2025): JAMSI - Januari 2025
Publisher : CV Firmos

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54082/jamsi.1301

Abstract

Ecorilife.id merupakan salah satu UMKM yang bergerak pada bidang produksi ecoprint. Akan tetapi, terdapat permasalahan prioritas dari mitra, yaitu kualitas warna pada produksi kain ecoprint yang tidak stabil, meliputi pewarnaan dasar gelap dan terang, pengaruh teknis pewarnaan, dan penggunaan bahan-bahan pewarna alam. Solusi yang diharapkan mampu menyelesaikan permasalahan tersebut dilakukan melalui pendampingan proses produksi ecoprint pada Ecorilife.id. Kegiatan tersebut dilakukan dengan melakukan optimasi pada tahap pewarnaan dan mordanting menggunaan tawas (Al2(SO4)3), natrium asetat (Na-acetat), atau soda abu (Na2CO3) supaya produk ecoprint memiliki warna yang tidak mudah luntur serta bercampur secara sempurna dengan kain. Pewarna dasar kain dioptimasi dengan pewarna alam tingi dan jolawe. Tahapan pewarnaan ecoprint dilakukan dengan teknik steaming setelah tahap mordanting yang kemudian dikeringkan. Tahap pewarnaan dan pembentukan motif dilakukan dengan menggunakan motif yang muncul dari daun jati, daun akalipa, daun kalpataru, dan bunga cosmos. Fiksasi dilakukan dengan kapur untuk menghasilkan warna-warna ecoprint yang jelas. Hasil menunjukkan terciptanya produk ecoprint dengan kualitas warna tinggi yang dapat diamati melalui hasil pewarnaan yang terlihat detail, tidak berbaur, dan tidak luntur.
Co-Authors Abd. Rasyid Syamsuri Abdul Basith Ari Handono Ramelan Ari Yusnani Cynthia Linaya Radiman Daryani Daryani Deana Wahyunigrum Eddy Heraldy Edi Pramono Edi Pramono Eko Cahyono Faradilla, Radianita Fitria Rahmawati Gesyth Mutiara Hikhmah Al Ichsan Indriana Kartini Jumina Jumina Khoirina Dwi Nugrahaningtiyas Khoirina Dwi Nugrahaningtyas Khoirina Dwi Nugrahaningtyas Khoirina Dwi Nugrahaningtyas Khoirina Dwi Nugrahaningtyas Lestar, Witri Wahyu Lestari, Witri Wahyu Melina, Dika Caesar Mulyani Mulyani Naufal, Widyan Muhammad Nuryah Muchlisha Nuryono Nuryono Nuryono Nuryono Nuryono Nuryono Ozi Adi Saputra Rahayu Rahayu Rosid Eka Mustofa Sayekti Wahyuningsih Sayekti Wahyuningsih Sentot Budi Rahardjo Sentot Budi Rahardjo Sentot Budi Raharjo Sigit Wiwiet Saputro, Sigit Wiwiet Teguh Endah Saraswati Teguh Endah Saraswati Teguh Endah Saraswati Triyono Triyono Triyono Triyono Venny, Venny Wega Trisunaryanti Wega Trisunaryanti Witri Wahyu Lestari Wulandari, Resa Yulianto Adi Nugroho Yunita Haryanti Zetadini, Reza