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All Journal VALENSI Jurnal Kesehatan Lingkungan indonesia FLYWHEEL : Jurnal Teknik Mesin Untirta Indonesian Journal of Chemistry Jurnal Kartika Kimia Molekul: Jurnal Ilmiah Kimia Jurnal Riset Teknologi Industri ASEAN Journal of Community Engagement Makara Journal of Science Molekul: Jurnal Ilmiah Kimia Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Sains Materi Indonesia
Agustino Zulys
Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Universitas Indonesia, Depok 16424, Indonesia
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation Other

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Photocatalytic Degradation of Methylene Blue and Methyl Orange by Y-PTC Metal-Organic Framework Adawiah Adawiah; Muhammad Derry Luthfi Yudhi; Agustino Zulys
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 7, No. 2, November 2021
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v7i2.22267

Abstract

The yttrium based metal-organic framework (MOF) Y-PTC was synthesized by the solvothermal method using perylene as the linker and yttrium as metal ion. This study aims to assess the photocatalytic activity of yttrium-perylenetetracarboxylate (Y-PTC) metal-organic framework (MOF) toward methylene blue and methyl orange under visible light irradiation. The results of the FTIR analysis showed that Y-PTC MOF had a different structure and composition from its precursor (Na4PTC). The Y-PTC MOF has a bandgap energy value of 2.20 eV with a surface area of 47.7487 m2/g. The SEM-EDS analysis showed an elemental composition of yttrium, carbon, and oxygen, were 6.9%, 72.1% and 20.7%, respectively. Furthermore, Y-PTC MOF was able to adsorb dyes at the optimum by 78.10% and 35.57% toward methylene blue (MB) and methyl orange (MO) at the dispersion period of 60 mins. Y-PTC MOF exhibited photocatalytic activity towards the degradation of methylene blue and methyl orange under visible light irradiation. The addition of H2O2 inhibited Y-PTC photocatalytic activity towards MO degradation from 50.89% to 26.38%. In contrast to MO, the addition of H2O2 had a positive effect on MB, which increased the degradation from 87.56% to 91.65%. Therefore, Y-PTC MOF possessed the potential of a photocatalyst material in dyes degradation under visible light irradiation.
Synthesis and electrical conductivity of silicon carbide fiber as electronic semiconductor Masripah Masripah; Jan Setiawan; Agustino Zulys
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume VI, Nomor 1, April 2020
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v2i1.6379

Abstract

Silicon carbide shows advantage characteristics to be used as electronical devices that operated in the extreme conditions.  Its potentially improve many limitations compared to the silicon.  The applications of SiC are used in high power, high frequency, and/or high temperature conditions.  Intrinsic semiconductor properties of SiC has high thermal conductivity, mechanically and chemically stable and good resistance to the radiation. In this research, SiC fiber was synthetized from polycarbosilane polymer precursor (PCS) that solved in N,N-dimethylformamide (DMF) and toluene. This solution was that processed using electrospinning to form fibers. The fibers were cured at 200 °C and continued with pyrolyzed varied at 1200, 1300 and 1400 °C for 1 hour. The fibers electrical conductivity were carried out by LCR meter. The electrical conductivity for lower frequency at 62.36 Hz showed 7.28 × 10-6 S, achieved by the fibers that pyrolyzed at 1200 °C.  For high frequency at 100 kHz showed the fibers that pyrolyzed at 1400 °C acquired for 1.24 × 10-5 S.m-1 for its electrical conductivity.  The value of its band gap based on Kubelka Munk Equation was take placed for fibers that showed significant value at high frequency using UV-Vis DRS.  The band gap value was achieved at 2,56 eV.
STUDI TEORITIS STRUKTUR DAN SPEKTRUM ELEKTRONIK KOMPLEKS [Ln(pytpy)(NO3)3] SECARA KOMPUTASI METODE SPARKLE/RM1 Ely Setiawan; Agustino Zulys
Molekul Vol 10, No 1 (2015)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (590.115 KB) | DOI: 10.20884/1.jm.2015.10.1.168

Abstract

Telah dilakukan penelitian tentang studi teoritis struktur dan spektrum elektronik kompleks [Ln(pytpy)(NO3)3] (Ln=Eu, Tb, pytpy=4’-(2-pyrrolyl)-2,2’:6’,2”-terpyridine) menggunakan metode komputasi semiempiris Sparkle/RM1. Metode Sparkle/RM1 ini dapat digunakan untuk memperoleh struktur geometri paling stabil dan parameter struktur dalam keadaan gas sebagai simulasi metode eksperimen yang mungkin terlalu mahal. Perhitungan spektrum elektronik dilakukan dengan ZINDO/S, dengan mengganti sparkle dengan titik muatan +3 pada koordinat yang dihasilkan melalui Sparkle/RM1. Hasil penelitian menunjukkan bahwa ion lantanida pada kompleks [Ln(pytpy)(NO3)3] memiliki bilangan koordinasi 9, yang berikatan dengan satu ligan tridentat pytpy dan tiga gugus nitrat sebagai ligan bidentat. Panjang ikatan rata-rata ion lantanida dengan atom N pada ligan pytpy adalah 2,541 Å dan 5,14 Å untuk Eu3+ dan Tb3+. Studi teoritis spektroskopi menunjukkan bahwa metode Sparkle/RM1 cukup akurat dalam memprediksi spektrum IR ligan pytpy, kompleks [Eu(pytpy)(NO3)3] maupun [Tb(pytpy)(NO3)3]. Spektrum UV-Vis kompleks [Eu(pytpy)(NO3)3] dan [Tb(pytpy)(NO3)3] memiliki intensitas serapan yang lebih kuat dan absorbansi yang lebih besar dari spektrum UV-Vis ligan pytpy.
Analisis Mikrostruktur Dan Sifat Magnetik Terhadap Pengaruh Suhu Sintering Pada Yttrium Iron Garnet Disintesis Menggunakan Metode Solgel Sari Hasnah Dewi; Ade Mulyawan; Didin Sahidin Winatapura; Agustino Zulys; Wisnu Ari Adi
Jurnal Riset Teknologi Industri Vol.15 No.2 Desember 2021
Publisher : Balai Riset dan Standardisasi Industri Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26578/jrti.v15i2.7049

Abstract

Yttrium Iron Garnet (YIG), dengan formula umum Y3Fe5O12, merupakan kandidat material yang dapat digunakan sebagai komponen utama pada perangkat berbasis gelombang mikro. Untuk tujuan yang lebih khusus, YIG dapat dijadikan komponen utama dalam pembuatan bahan cat anti radar untuk perangkat alutsista militer. YIG memiliki karakteristik bahan yang sangat menunjang untuk tujuan ini seperti sifat magnetik dan elektromagnetik yang baik, konduktivitas termal yang baik, resistivitas listrik yang tinggi, dan nilai permittivitas yang tinggi. Pada penelitian ini, telah dilakukan proses pembuatan YIG menggunakan metode sol-gel auto combustion dengan variasi suhu sintering 900 ˚C, 1100 ˚C dan 1300 ˚C. Berdasarkan hasil analisis data X-ray diffractometer (XRD) menggunakan metode Rietveld dengan program General Structure Analysis System (GSAS), dapat diketahui bahwa fasa tunggal Y3Fe5O12terbentuk pada suhu 1300 ˚C. Hasil ini sesuai dengan analisis Thermogravimetry Analyzer (TGA) yang menunjukan bahwa pembentukan kristalit fasa Y3Fe5O12 terjadi pada suhu 1300-1400 ˚C. Hasil data Fourier Transform Infra-Red (FTIR) menunjukkan terdapat puncak sistem tetrahedral garnet pada bilangan gelombang 670-560 cm-1. Struktur morfologi hasil observasi sampel menggunakan Scanning Electron Microscope (SEM) menunjukkan bahwa pada suhu sintering 1300 ˚C diperoleh tingkat homogenitas ukuran partikel yang paling tinggi dengan ukuran antara 1-2 μm. Sifat kemagnetan menunjukan bahwa nilai saturasi magenetik tertinggi pada Y3Fe5O12 diperoleh pada sintering 1300 ˚C yaitu 20.75 emu/g.Kata kunci: fasa, metode sol-gel, struktur morfologi, yttrium iron garnet
Efficient Degradation of Methylene Blue Using La-PTC-HIna/Ti3C2Tx MXene: Adsorption and Photocatalytic Degradation Agustino Zulys; Adawiah Adawiah; Nasruddin Nasruddin
Indonesian Journal of Chemistry Vol 22, No 5 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.71692

Abstract

Isonicotinic acid is a pyridine carboxylic compound that can be used as a linker to construct coordination complexes. Adding isonicotinic acid (HIna) to the metal-organic framework (MOF) enhanced the MOF surface area, pore volume, and pore size and increased its catalytic activity. Ti3C2Tx MXene nanosheet with excellent metal conductivity was also employed on MOF to optimize its functionality. This work aims to synthesize MOF modulated isonicotinic acid La-PTC-HIna and design the new materials: La-PTC/Ti3C2Tx MXene and La-PTC-HIna/Ti3C2Tx MXene hybrid, then apply them for methylene blue photodegradation. La-PTC-HIna, La-PTC/Ti3C2Tx MXene, and La-PTC-HIna/Ti3C2Tx MXene were synthesized by the sonochemical method. MOF La-PTC-HIna has the highest methylene blue photocatalytic degradation activity than MOF La-PTC, Ti3C2Tx MXene, La-PTC/Ti3C2Tx MXene, and La-PTC-HIna/Ti3C2Tx MXene with degradation efficiency of 99.48% in 20 ppm methylene blue under visible irradiation for 210 min. This study reveals the La-PTC-HIna and La-PTC-HIna/Ti3C2Tx MXene as a new material that has the potential to remove methylene blue from an aqueous solution.
Green Synthesis of Cr-PTC-HIna Metal Organic Frameworks (MOFs) and Its Application in Methylene Blue Photocatalytic Degradation Nur Mahrunnisa; Adawiah Adawiah; Isalmi Aziz; Agustino Zulys
Bulletin of Chemical Reaction Engineering & Catalysis 2023: BCREC Volume 18 Issue 3 Year 2023 (October 2023)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.18885

Abstract

Metal Organic Framework (MOF) is a material that serves as a photocatalyst for decomposing methylene blue pollutant. MOF can be constructed using several kinds of synthetic methods. This study aims to determine the alternative efficient and eco-friendly synthesis method of isonicotinic acid-modulated chromium perylene 3,4,9,10-tetracharboxylate MOF (Cr-PTC-HIna) using solvothermal, hydrothermal, sonochemical, and mechanochemical methods. FTIR analysis revealed that Cr-PTC-HIna was successfully fabricated only by solvothermal, hydrothermal, and sonochemical methods, yielding 40.68%, 44.27%, and 46.50%. Cr-PTC-HIna-ST, Cr-PTC-HIna-HT, and Cr-PTC-HIna-SC have band gap energies of 2.02, 2.02, and 1.98 eV, respectively. Cr-PTC-HIna-HT and Cr-PTC-HIna-SC with irregular shapes form agglomerations. Cr-PTC-HIna-SC had the highest surface area, pore volume, and pore size of 92.76 m2.g−1, 0.3947cm3.g−1, and 142.74 nm, respectively. Cr-PTC-HIna-SC has the highest percentage of methylene blue decolorization through adsorption of 61.843% and photocatalytic degradation of 25.635%. Sonochemical and hydrothermal showed potential as more eco-friendly methods than solvothermal in synthesizing Cr-PTC-HIna MOF. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
Synthesis of ZnO Nanoparticle using Lidah Mertua (Sansevieria trifasciata) Extract through Sol-Gel Method and Its Application for Methylene Blue Photodegradation Nanda Saridewi; Selviana Rustanti; Agustino Zulys; Siti Nurbayti; Isalmi Aziz; Adawiah Adawiah
Bulletin of Chemical Reaction Engineering & Catalysis 2023: BCREC Volume 18 Issue 3 Year 2023 (October 2023)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.19647

Abstract

Methylene blue is widely used in the textile industry and is difficult to degrade naturally because of its heterocyclic aromatic structure. One technique that can be used to degrade methylene blue is through a photocatalytic process using ZnO nanoparticles. This study aims to synthesize ZnO nanoparticles using Lidah mertua extract (Sansevieria trifasciata) as a capping agent by the sol-gel method, and determine the characteristics and stability of ZnO nanoparticles in methylene blue photodegradation. The synthesis of ZnO nanoparticles begins with drying Lidah mertua, grinding it, and then extracting it using distilled water. Furthermore, the extract was reacted with Zn(CH3COO)2.2H2O 0.15 M at pH 8. The extract was characterized using Fourier Transform Infrared (FTIR), and the ZnO nanoparticles were characterized using X-Ray Diffraction (XRD), ultraviolet-visible (UV-Vis) DRS, and Scanning Electron Microscopy (SEM). Lidah mertua extract has OH (hydroxyl), CN, CH, and C=C functional groups. The obtained ZnO nanoparticles have a crystal size of 19.324 nm. The crystalline phase is hexagonal; the morphology is spherical, with a particle size of 79.153 nm and a band gap energy of 3.21 eV. ZnO nanoparticles exhibited a methylene blue decolorization of 98.50% through 43.41% by adsorption and 55.09% by photocatalytic mechanism. ZnO nanoparticles showed good stability for a three-cycle reaction. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0)
Effectiveness of Iron Fortification on Soy-Based Foods Using Ferrous Bisglycinate in the Presence of Phytic Acid Yunarti, Rika Tri; Zulys, Agustino; Harahap, Lina Yuliana; Pramukti, Mai Saroh Ambar
Makara Journal of Science Vol. 17, No. 1
Publisher : UI Scholars Hub

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

Abstract

Glycine-modulated Zirconium Perylene-based Metal-Organic Framework for Rhodamin B Photocatalytic Degradation Zulys, Agustino; Defania, Mella; Gunlazuardi, Jarnuzi; Adawiah, Adawiah
Molekul Vol 18 No 3 (2023)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2023.18.3.9126

Abstract

Photocatalysis employing Metal-Organic Framework (MOF) material may degrade Rhodamin B pollutant. MOF photocatalytic activity can be adjusted by altering the ligands, metal ions, and modulators. This research aims to synthesize glycine-modulated zirconium perylene-based metal organic framework (Zr-PTCA-Gly) for Rhodamin B photocatalytic degradation under visible light irradiation. The activated Zr-PTCA-Gly exhibits good catalytic activity to degrade Rhodamine B with a 95% degradation efficiency.
Fotodegradasi Metilen Biru oleh Metal Organic Framework (MOF) Fe-PTC dengan Penambahan H2O2 dan Dioptimasi Menggunakan Desain Box Behnken Fathurrahman, Muhammad; Zulys, Agustino; Gunlazuardi, Jarnuzi
Jurnal Kartika Kimia Vol 6 No 2 (2023): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v6i2.228

Abstract

Metal-organic framework (MOF) is a group of materials that can act as a photocatalyst to degrade dyes under visible light. This research aims to synthesize a new MOF material using iron metal (Fe) and the organic linker perylene-3,4,9,10-tetracarboxylate (PTC) via the solvothermal method, then characterize it using FTIR, XRD, DRS, and SEM-EDS, as well as its application in photodegradation of methylene blue dye by MOF Fe-PTC with the addition of H2O2 using a Box Behnken design. FTIR spectrum with absorption at a wave number of 572 cm-1 which identifies the presence of bonds between Fe and O. Solubility tests show that the material was difficult to dissolve in polar, semipolar, and nonpolar solvents. EDS Mapping which shows the presence of the Fe element with a weight percentage of 21.6%. The synthesized MOF Fe-PTC has a degree of crystallinity of 46.56% and an average crystal size of 50.9 nm with the highest diffraction peak at 2θ = 33.16°. DRS analysis shows that the MOF Fe-PTC has a bandgap energy of 1.93 eV with a maximum wavelength (lmax) of 638 nm. Characterization using SEM shows that the MOF Fe-PTC has a shape like a cylindrical tube. The optimum conditions obtained from photodegradation of methylene blue by MOF Fe-PTC with the addition of H2O2 under visible light irradiation of 250 W statistically are 1.35 mg for photocatalyst weight, 0.22 M for H2O2concentration, and 135 minutes for contact time.
Co-Authors Adawiah Adawiah Adawiah Adawiah Adawiah Adawiah Adawiah Adawiah Adawiah Adawiah Adawiah Adawiah adawiah adawiah, adawiah Ade Mulyawan Adriana, Elva Dissa Andriyani, Leni Bale, Uly Fitria Bambang Heru Susanto, Bambang Heru Dede Sukandar Defania, Mella Didin Sahidin Winatapura Ely Setiawan Fadhilla, Rizka Fadhilla, Rizkha Farhan Maulana Azhar Farishi, Salman Ginting, Grace Gardenia Hadriyani, Rizka Haidir, Banu Muhammad Harahap, Lina Yuliana Hayati Sari Hasibuan Iman Abdullah Isalmi Aziz Istiqomah, Muhsinatul Jan Setiawan Jarnuzi Gunlazuardi Latifah Tulhusna Lina Yuliana Harahap Mabuchi, Takuya Mai Saroh Ambar Pramukti Mala, Farhah Syahidatul Masripah Masripah Mawaddah, Siti Mutia Mochamad Chalid Muhammad Derry Luthfi Yudhi Muhammad Derry Luthfi Yudhi Muhammad Fathurrahman Muhammad Ghozali Muhammad Shofyan Gunawan Nanda Saridewi, Nanda Nasruddin Nasruddin Nasruddin Nasruddin Nur Mahrunnisa Nurhasni Nurhasni Pramukti, Mai Saroh Ambar Ramadhan, Fitri Nur Ridla Bakri Rika Tri Yunarti Risma Nur Fitria Sari Hasnah Dewi Selviana Rustanti Siti Nurbayti Siti Nurbayti Siti Nurbayti Sri Komala Sri Komala Suminta, Tiara Amalia Syauqi, Muhammad Iqbal Tulhusna, Latifah Wahyudin Wahyudin Wisnu Ari Adi Wulandari Oktavia Yunarti, Rika Tri