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All Journal VALENSI International Journal of Renewable Energy Development JURNAL KIMIA SAINS DAN APLIKASI Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Fisika Unand Jurnal Riset Kimia JFA (Jurnal Fisika dan Aplikasinya) Journal of Aceh Physics Society Elkawnie Lantanida Journal Jurnal Katalisator Jurnal Ilmu Fisika Hydrogen: Jurnal Kependidikan Kimia Bulletin of Chemical Reaction Engineering & Catalysis
Syukri Syukri
Department Of Chemistry, Andalas University, Jl. Universitas Andalas, Limau Manis, Padang
Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Physics

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DISAIN GEOMETRI REAKTOR FOTOSEL CAHAYA RUANG Rahadian Zainul; Admin Alif; Hermansyah Aziz; Syukri Arief; Syukri -
Jurnal Riset Kimia Vol. 8 No. 2 (2015): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v8i2.230

Abstract

This research aims to obtain reactor design photocells that can convert light energy into electrical energy space. Room light energy derived from sunlight that comes into the room and fluorescent light irradiation. Photocells reactor using a panel of copper oxide (Cu2O/CuO) of calcined Cu plate and filler electrolyte Na2SO4 0.5 N. The design of the geometry of the reactor photocells covering thickness of the glass pane, the distance between the electrodes, the interface layer, layer and coating reflector panels, and junction type np used. Reactor photocells 1 (R1) and 2 (R2) is identical in geometry to the thickness of the glass panel 3 mm thick reactor 15 mm without anti reflector, but the difference at the junction of type n, (R1 = plate Cu; R2 = plate Aluminum) generate 182.82 mW/m2 and 21119644.3 NW/m2. Design R3 (junction-type n = plate Cu) and R4 (junction-type n = plate Al), a panel thickness of 15 cm and has a layer anti reflector provide power 214.95 mW/m2 and 24163298.3 NW/m2. Design Reactor 5 (R5 = Cu) and R6 (Al), thickness of 9 mm, the distance between the electrodes 0:30 mm, using anti reflector carbon, giving each the power of 277.36 mW/m2 and 31258420.91 NW/m2. The most optimum reactor design is the design of R6 with 2:14% conversion capabilities (Intensity = 90.21 foot candles) for the sunlight into the room.
Sintesis dan Karakterisasi Enkapsulat Katalis Nikel (II) pada Silika Mesopori Modifikasi Admi Admi; Fitria Ramadhani; Syukri Syukri
Jurnal Riset Kimia Vol. 11 No. 2 (2020): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v11i2.356

Abstract

Ni(II)-BF3/MCM-41 was synthesized for heterogeneous catalyst. The boron trifluoride modified mesoporous silica BF3/MCM-41 was studied to investigate its ability as supporting agent in heterogeneous catalysis system. For this purpose, the structural directing agent remaining in as-synthesis MCM-41 removed by solvent extraction. Surface modification of mesoporous silica MCM-41 with aniline and boron trifluoride was carried out. Then, the surface of boron trifluoride modified mesoporous silica was subjected to an encapsulation with Ni(II) ions. These solid materials were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and atomic absorption spectroscopy (AAS). In the FTIR spectra of the modified silica mesoporous, the presence of vibration band >Si-O-B confirm the success of modification of support. While, the shifting of the vibration band >Si-O-Si< is considered an indication of the proof of Ni(II) species onto the modified mesoporous silica. From the SEM photograph, it can be seen that the morphology of the Ni(II)-BF3/MCM-41 tend to form aggregates of smaller particles. Based on measurement of metal content by AAS, it was known that the value of metal loading is 33%. While for the leaching test, Ni(II)-BF3/MCM-41 lost only 0.014 % of Ni metal. It indicates the stability of the interaction between the N(II) and support of the modified mesoporous silica.
Preparation of Activated Carbon from Tea Waste by NaOH Activation as A Supercapacitor Material Eldya Mossfika; Syukri Syukri; Hermansyah Aziz
Journal of Aceh Physics Society Volume 9, Number 2, May 2020
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jacps.v9i2.15905

Abstract

Karbon aktif dari ampas teh telah disintesis dan telah diuji sebagai elektroda superkapasitor. Pembuatan karbon aktif berdasarkan variasi rasio massa karbon dan aktivator NaOH yaitu 1:4, 1;5 % b/b yang diberi kode AC-4 dan AC-5. Sintesis elektroda karbon aktif di awali dengan proses pra-karbonisasi dan dilanjutkan dengan proses aktivasi kimia. Sampel di karbonisasi pada suhu 800 oC dengan laju kenaikan 50C/menit dalam kondisi gas inert (N2). Karbon aktif ampas teh dikarakterisasi dengan SAA (Surface Area Assessment). Sifat elektrokimia dan kinerja elektroda karbon aktif yang disintesis diukur menggunakan metode voltametri siklik dalam larutan elektrolit H2SO4 1M. Elektroda karbon aktif menunjukkan kapasitansi spesifik tertinggi pada sampel AC-4 yaitu 67 F/g dengan scan rate 1 mV/s dan luas permukaan spesifik 473 m2/g. Mengingat sifat elekrokimia yang menarik tersebut, dan banyaknya ampas teh yang mudah ditemukan disekitar kita maka elektroda karbon aktif ini berpotensi untuk bahan pembuatan superkapasitor elektrokimia skala besar di masa depan.Activated carbon from tea waste has been synthesized and has been tested as a supercapacitor electrode. Making activated carbon based on variations in the ratio of carbon mass and activator NaOH that is 1: 4, 1; 5%wt coded AC-4 and AC-5. Synthesis of activated carbon electrodes begins with the pre-carbonization process and is followed by a chemical activation process. Samples are carbonized at 800 oC with a rate of increase of 50C / min under inert gas (N2) conditions. Activated carbon of tea waste is characterized by SAA (Surface Area Assessment). The electrochemical properties and performance of the activated carbon electrode were measured using the cyclic voltammetry method in a H2SO41 M electrolyte solution. The activated carbon electrode showed the highspecific capacitance in the AC-4 sample of 67 F / g with a scan rate of 1 mV / s and surface area Specifically 473 m2 / g. Considering these interesting electrochemical properties, and the abundance of tea dregs that are easily found around us, this activated carbon electrode has the potential to be a material for making large-scale electrochemical supercapacitors in the future.Keywords:Limbah ampas teh, Aktivator, Kapasitansi spesifik, NaOH, Supekapasitor
Study of activated carbon characteristic from ketaping fruit shell (Terminalia Catappa) as supercapasitors electrode Rahma Joni; Syukri Syukri; Hermansyah Aziz
Journal of Aceh Physics Society Volume 10, Number 1, January 2021
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jacps.v10i1.17755

Abstract

Studi karakteristik karbon aktif dari cangkang buah ketaping (Terminalia Catappa) sebagai elektroda superkapasitor telah diteliti. Karbon aktif dari cangkang buah ketaping (CBK) disiapkan dengan proses karbonisasi pada suhu 400oC dan Proses aktivasi KOH pada suhu 800oC di bawah aliran gas N2. Karbon aktif CBK memiliki kandungan karbon dengan massa atomik sebesar 97,52%. Karbon aktif CBK memiliki struktur amorf dengan dua buah puncak yang lebar pada sudut 2θ yaitu 24,93o dan 42,93o yang bersesuaian dengan bidang (002) dan (100). Karbon aktif CBK yang dihasilkan memiliki pola serapan dengan jenis ikatan OH, C-H, C=O, dan C=C. Adanya ikatan OH dan C=O menunjukkan bahwa arang aktif yang dihasilkan cenderung bersifat lebih polar. Morfologi permukaan karbon aktif CBK menunjukan distribusi ukuran pori yang merata dan luas permukaan yang besar. Luas permukaan spesifik karbon aktif dari CBK adalah 799,892 m2×g-1 dengan volume total pori 0,080 cm3×g-1 dan jari-jari pori rata-rata 1,9072 nm. Kapasitansi spesifik dari karbon aktif dari CBK adalah sebesar 125,446 F×g-1. Studies on the characteristics of activated carbon from ketaping fruit shells (Terminalia Catappa) as supercapacitor electrodes have been studied. Activated carbon from ketaping fruit shells (KFS) prepared by carbonization process at 400oC and the KOH activation process is carried out at 800oC under N2 gas flow. Activated carbon KFS has a carbon content with 97.52% of atomic mass. Activated carbon KFS has an amorphous structure with two wide peaks at an angle of 2θ 24.93ᵒ and 42.93ᵒ corresponding to the plane (002) and (100). Activated carbon KFS produced has an absorption pattern with OH, C-H, C = O, and C = C bond types. The presence of OH and C = O bonds indicates that the activated charcoal produced tends to be more polar. The surface morphology of activated carbon KFS shows an even distribution of pore size and large surface area. The specific surface area of activated carbon KFS is 799.892 m2×g-1 with a total pore volume 0.080 cm3×g-1 and an average pore radius of 1.9072 nm. The specific capacitance value of activated carbon KFS is 125.444 F×g-1.Keywords: Ketaping, Activated Carbon, Supercapacitor, Activator, Capacitance. 
Theoretical Study of Xanthone Derivative Corrosion Inhibitors Using Density Functional Theory (DFT) Fitria Ramadhani; Emriadi Emriadi; Syukri Syukri
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 6, No. 1, May 2020
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v6i1.11953

Abstract

The potential corrosion inhibitor properties of xanthone compounds and its derivatives (gartanin, 8-desoxygartanin, α-mangostine, and β-mangostine) can be demonstrated through Density Functional Density Theory (DFT) at the theoretical level B3LYP/6-31G(d, p). Quantum chemical parameters such as the energy of the highest molecular orbital occupied by electrons (EHOMO), the energy of the lowest molecular orbitals not occupied by electrons (ELUMO), energy gap (Egap / ΔE), dipole moment (µ), and total energy (Etot) can be calculated using DFT method. The DFT data analysis equation can determine the value; potential energy (I), electron affinity (A), absolute electronegativity (χ), global hardness (η), global softness (σ), number of transfer electrons (ΔN), electrophilicity (ω), and corrosion inhibition efficiency (IE%) . The results of quantum chemical parameter calculations show the potential inhibitory properties of gartanin > α-mangostine > β-mangostine > 8-desoxygartanin > xanthone, with the calculated corrosion inhibition efficiency value of gartanin of 86.54%.
Degradasi Zat Warna Metanil Yellow Secara Fotolisis Dan Penyinaran Matahari Dengan Penambahan Katalis TiO2-anatase dan SnO2 Bhayu Gita Bhernama; Safni Safni; Syukri Syukri
Elkawnie: Journal of Islamic Science and Technology Vol 1, No 1 (2015)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v1i1.517

Abstract

Degradation of Metanil yellow has been done. In this research the degradation process was done by photolysis and sunlighting method by using TiO2-SnO2 catalysis. The residu of metanil yellow was centrifuged and measured by UV/Vis Spectrophotometer at 300 – 600 nm after degradation. 6 mg/L of Metanil yellow and addition of 0,03 g TiO2-anatase and SnO2 for 150 min, gave the percentage of degradation 27,38 % and 25,00 % after photolysis. 6 mg/L of Metanil yellow and addition of 0,03 g TiO2-anatase and SnO2 for 150 min, gave the percentage of degradation 94,84% and 93,25% after lighted by sun with 1,13256 1015 foton cm-2/s intensity. From the results percentage of degradation showed that degradation with the addition of TiO2-anatase and SnO2 can improve the degradation of methanil yellow. The percentage of degradation proves that the addition of TiO2-anatase and SnO2 which is lighted by sun is better than photolysis process.
Natural Clay of Pasaman Barat Enriched by CaO of Chicken Eggshells as Catalyst for Biodiesel Production Syukri Syukri; Kevin Septioga; Syukri Arief; Yulia Eka Putri; Mai Efdi; Upita Septiani
Bulletin of Chemical Reaction Engineering & Catalysis 2020: BCREC Volume 15 Issue 3 Year 2020 (December 2020)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.15.3.8097.662-673

Abstract

This study uses broiler chicken eggshells to enhance catalytic activity of clay obtained from Pasaman Barat (West Sumatra, Indonesia) in lab-scale biodiesel production. The eggshell is a source of calcium oxide (CaO) which operates as a catalyst when mixed with the clay (Ca-Clay). Two other catalysts were also prepared as comparisons by 1) heating the clay at 800 oC for 6 hours (P-Clay), 2) mixing the P-Clay with KOH (K-Clay). An X-ray Fluorescence (XRF) showed the elemental composition of Ca-Clay contained Ca, Si, Al, and Fe. An X-ray Diffraction (XRD) showed the formation of highly crystalline CaO in the Ca-Clay with the main peak at 2θ = 37.27o. The Fourier Transform Infra Red (FTIR) spectrum showed an absorption peak in the range of 700-900 cm-1 indicating Ca-O stretching demonstrating successful incorporation of the CaO into the clay. The catalytic activity test showed the Ca-Clay had a higher catalytic performance than P-Clay and K-Clay in terms of the yield of biodiesel produced (73%). Copyright © 2021 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). 
Pengaruh Pemanasan dan Ethylen Glycol pada Elektrodeposisi Lapisan Tipis Magnetite menggunakan Continue Direct Current Sylvina Tebriani; Syukri Syukri; Dahyunir Dahlan
Jurnal Fisika dan Aplikasinya Vol 9, No 2 (2013)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (524.683 KB) | DOI: 10.12962/j24604682.v9i2.844

Abstract

Telah berhasil dilakukan penumbuhan lapisan tipis magnetite (Fe3O4) di atas substrat Indium Tin Oxide (ITO) dengan metode elektrodeposisi (ED), menggunakan Continue Direct Current (CDC). Karakterisasi XRD menunjukkan bahwa proses pemanasan sangat mempengaruhi terbentuknya lapisan tipis magnetite. Magnetite terdeposisi dengan struktur FCC dengan ukuran kristal 32,617 nm sampai 185,521 nm, dibawah kontrol konsentrasi surfaktan terhadap pelarutnya. Parameter deposisi optimum adalah ukuran kristal dan permukaan yang lebih halus. Parameter kisi masing-masing sampel adalah 8,313 , 8,365 , 8,354 , 8,351 , sedikit lebih rendah dari nilai standar 8.375 (JCPDS # 01-088-0315). Sedangkan jarak antar bidang kristal yang diperoleh berada pada kisaran 2,507 sampai dengan 2,522 . Hasil karakterisasi SEM menunjukkan bahwa magnetite tersebar merata di atas substrat ITO. Tiga sampel (K,O,P) terdeposisi dalam bentuk agregat dari kristal magnetite. Sedangkan sampel Q terdeposisi dalam bentuk lapisan.
Sintesis Lapisan TiO2 Pada Substrat ITO Menggunakan Metode Elektrodeposisi dan Spin Coating Anggia Arista; Dahyunir Dahlan; Syukri Syukri
Jurnal Ilmu Fisika (JIF) Vol 8 No 1 (2016): March 2016
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.8.1.17-27.2016

Abstract

Telah dilakukan sintesis lapisan tipis TiO2 menggunakan metode elektrodeposisi dan spin coating. Elektrodeposisi menggunakan larutan elektrolit 0,25 M TiCl3. Dalam penelitian ini juga dilakukan variasi larutan elektrolit dengan penambahan CTAB, PEG dan penambahan H3BO3. Selanjutnya lapisan TiO2 disintesis menggunakan metode spin coating yang dilakukan di atas lapisan TiO2 setelah elektrodeposisi. Larutan prekusor yang digunakan adalah Titanium Butoxide (Ti(OC4H9)4 dengan waktu aging larutan 48 jam. Hasil karakterisasi SEM menunjukkan elektrodeposisi lapisan tipis TiO2 dengan penambahan CTAB dan PEG menghasilkan morfologi permukaan yang homogen dan berpori pada lapisan TiO2. Berdasarkan hasil karakterisasi UV-Vis, energi gap TiO2 pada sampel yang disintesis menggunakan metode elektrodeposisi adalah  3,86 eV, sedangkan nilai energi gap yang didapat pada sampel menggunakan metode spin coating adalah 3,18 eV.
Synthesis of Graphene Oxide Enriched Natural Kaolinite Clay and Its Application For Biodiesel Production Syukri Syukri; Fadhil Ferdian; Yetria Rilda; Yulia Eka Putri; Mai Efdi; Upita Septiani
International Journal of Renewable Energy Development Vol 10, No 2 (2021): May 2021
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2021.32915

Abstract

A heterogeneous catalyst is one type of catalyst which is very effective for biodiesel production; thus, in this study, a novel heterogeneous bifunctional catalyst was prepared by kaolinite clay obtained from Padang of West Sumatera and impregnated with graphene oxide and potassium hydroxide (KOH) for the simultaneous esterification and transesterification reactions of palm oil into biodiesel. For comparison, two other catalysts were also prepared. The first catalyst was the same clay which was heated at 450ºC for 4 hours, and the second catalyst was the same clay which was impregnated with potassium hydroxide (KOH) only. The three catalysts were characterized using X-Ray Fluorescence (XRF), X-Ray Diffraction (XRD), and Fourier Transform Infra-Red (FTIR). XRF analysis showed that the clay sample’s main composition consisted of 54% silica, 35% alumina, and 7% hematite. The XRD analysis results showed that the most dominant crystal composition was quartz, kaolinite, and hematite. The analysis results using FTIR showed a change in intensity and shift in wave numbers indicating a cation exchange. The catalytic activity test was carried out with a ratio of oil and methanol 1:6, catalyst amount 5%, 60ºC reaction temperature, and 4 hours of reaction time.The results showed that the catalytic activity of clays impregnated with graphene oxide and potassium hydroxide was better with a yield of 58% compared to clays without impregnation and other clays that were only impregnated with KOH under the yields of 0.8% and 0.4%, respectively
Co-Authors Adlis Santoni Admi Admi Admi Admi Admi Admi Admin Alif Alif, Admin Amelina Dwika Hardi Anggia Arista Ariyetti Ariyetti Bhayu Gita Bhernama Dahyunir Dahlan Delvi Isnaini Deswati Deswati Dewi Khofifatul Khoiriah Ebriyen Zeni Eldya Mossfika Elsa Agustina Emriadi - Fadhil Ferdian Fadhilla, Anna Fitria Ramadhani Fitria Ramadhani Florencia Tri Angellika Hermansyah Aziz Ida Ayu Putu Sri Widnyani Ilona Bella Kevin Septioga Mai Efdi Matlal Fajri Alif Muhammad Nasir Muldarisnur, Mulda Nabiel Fajarandi Nengsih, Zarnida Widia Novesar Jamarun Olly Norita Tetra Rahadian Zainul Rahayu Rahayu Rahma Joni Rahma Joni Renny Fitria Rycce Sylviana Pratikha Safni Safni Solly Aryza Sry Wahyuni Sylvina Tebriani Syukri Arief Upita Septiani Yetria Rilda Yulia Eka Putri