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All Journal Reaktor Jurnal Sains dan Teknologi Mechatronics, Electrical Power, and Vehicular Technology Jurnal Sains Materi Indonesia Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Konversi Journal Of Chemical Process Engineering (JCPE) Indonesian Journal of Chemistry Communications in Science and Technology Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Teknomekanik Unri Conference Series: Community Engagement Journal of Applied Materials and Technology Journal of Bioprocess Chemical and Environmental Engineering Science Journal of Community Engagement Research for Sustainability SAINSTEK Estungkara: Jurnal Pengabdian Pendidikan Sejarah Journal Of Chemical Process Engineering JURNAL REKAYASA KIMIA & LINGKUNGAN Journal of Engineering and Technological Sciences Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran
Amun Amri
Department Of Chemical Engineering, Faculty Of Engineering, Riau University
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Nursing Public Health Social Sciences Other

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Pengaruh Ketebalan Koating TiO2 Dan Konsentrasi Pelarut Etanol Terhadap Voltase Dye Sensitized Solar Cell (DSSC) Menggunakan Ekstrak Buah Senggani (Melastoma Candidum D. Don) Ranti, Aisyah Dewi; Amri, Amun; Yelmida, Yelmida
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Solar cell is an active element that converts light energy into electrical energy by photovoltaic effect. Dye Sensitized Solar Cell (DSSC)is the into third generation that is solar cells. The aims of this study is to determine the effect of TiO2 layer thickness and the concentration of ethanol to the DSSC voltage. The study began by making a dye solution of 20 grams of Senggani dissolved in methanol, acetic acid and distilled water. FTO glass coating was then performedusing TiO2 that was dissolved in ethanol, then deposited by spin coating and sintering method using furnace. The next step was the manufacture of electrolytic solution, a carbon electrode manufacture and assembly of DSSC. The test results using a UV-Vis absorbance showed that the dye solution containing anthocyanin at 520 nm absorption. DSSC was achieved the higher voltage due the thickness of TiO2. The best result (0.9524 Volt / cm2) by variation of TiO2thickness (≈ 387 m) with ethanol absolute (without dilution). XRD test showed that TiO2 anatase was anatase phase. The morphology test show that the coating of TiO2 with ethanolsolvent have a particles size than coating with distilled water solvent. The adhesion test showed the adhesion coating on the FTO glass was at good qualifications 2B.Keywords: DSSC, FTO glass, TiO2 coating thickness, TiO2
Pengaruh Penambahan Graphene Oxide Terhadap Sifat Bioplastik Berbasis Pati Singkong Ekawati, Lestari; Amri, Amun; Bahruddin, Bahruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Conventional plastics are still often used today derived from synthetic polymer materials that are difficult to be recycled and degraded by microorganisms. Bioplastic is one of solution to this problem. One of the materials that have the potential to be used as raw material is cassava because it has a high starch content. However, starch has a weakness that is still low mechanical properties. The general purpose of this research is to study the effect of adding graphene oxide and stirring time to mechanical properties, and biodegradation of cassava starch based bioplastic. Bioplastic was synthesized by intercalation method with variation of graphene oxide concentration (5% v / v and 15% v / v) and stirring time variation (30 minute and 60 minute). The results of the analysis showed that the treatment with the addition of filler graphene oxide and the variation of stirring time contributed to the resulting bioplastic mechanical properties. Bioplastic with the best characteristic was obtained by adding 15% graphene oxide and 60 minutes stirring time with tensile strength 3,92 Mpa, elongation 13,216%, modulus young 29,66 Mpa with water resistance 27,42% and within 1 week degraded 50 , 83%.Keywords: Bioplastic, glycerol, graphene oxide, Cassava Starch, plasticizer
CaO Berbasis Kulit Telur Ayam Dengan Penambahan Karbon Aktif Dan Natrium Hidroksida (CaO-NaO/C) Sebagai Katalis Untuk Sintesis Biodiesel Dari Minyak Sawit Off-Grade Rahayu, Ricky Puji; Helwani, Zuchra; Amri, Amun
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Chicken eggshells CaO based catalyst with the addition of activated carbon and sodium hydroxide (CaO-NaO/C) has been successfully synthesized for production of biodiesel from palm oil off-grade. The catalyst was characterized by X-Ray Diffraction analysis (XRD), Brunauer-Emmett-Teller (BET) and basic strength while the characterization of biodieselwas by Gas Chromatography-Mass Spectrometry (GC-MS). The catalyst was synthesized by calcining the chicken eggshell as source of CaCO3 at the calcination temperature of 900 ˚C for 3 hours. The CaO was then supported by activated carbon as catalyst buffer andimpregnated with 30% NaOH solution. The catalyst with the highest catalytic activity was obtained at calcination temperature of 500 ˚C and mass ratio of CaO:C at 6:4. The yield of biodiesel amounted to 79.08% were obtained by transesterification process with the molarratio of oil:methanol 1:10, catalyst concentration of 1%-b oil and reaction temperature of 65 ˚C for 3 hours. The CaO, Na2CO3, Ca(OH)2 and CaCO3 were found in the catalyst through the (XRD) while the basic strength of the catalyst H_ was > 9,3 determined by using Hammett Indicator phenolphthalein. The specific surface area of the catalyst obtainedthrough analysis by the (BET) method was 18.880 m2/g. Characteristics of biodiesel such as density, kinematic viscosity, acid number, and flash point have matched with the standard for biodiesel specification. Some methyl esters formed such as methyl palmitate and methyloleate were found in biodiesel through analysis of (GC-MS).Keywords : Biodiesel, catalysts, calcium oxide, activated carbon, transesterification
Pembuatan Katalis Heterogen Naoh/Cao/C Dari Kulit Telur Ayam Untuk Produksi Biodiesel Dari Minyak Sawit Off Grade Hawa, Karfika Ainil; Helwani, Zuchra; Amri, Amun
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Eggshell waste was modified by calcination, hydration and dehydration methods. Which were impregnated with activated carbon and NaOH made to be used as heterogeneous base catalysts used off grade palm oil transesterification reactions.The catalyst with the highest activity on production of biodiesel is obtained in the catalyst prepared by calcination temperature of 800 °C and catalyst ratio mass of 7:3 with transesterification reaction conditions of a molar ratio of methanol/oil 6:1, catalyst dosage of 6% by weight, temperature of 70 °C for 3 hours having yield biodiesel results reached 79,08%.Keyword: activated carbon, biodiesel, calcium oxide, catalysts, transesterification.
Pengaruh Konsentrasi Dan Rasio Berat Grafena Pada Geopolimer Berbasis Limbah Fly Ash Pabrik Kelapa Sawit Dengan Aktivator KOH Malindo, Muhammad Eri; Amri, Amun; Zultiniar, Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Geopolimer is a synthesis of organic polymers with high concentrated alkaline activator reacting with SiO2 and Al2O3 in fly ash. Geopolimer can reduce the use of OPC and reducing solid waste (fly ash) the result of burning oil palm shells in the industry’s oleokimia at Riau Province. This research aims to make the fly ash-based factory geopolimer palm oil is obtained from PT. Bangun Tenera Riau (PT. BTR) with the addition of graphene as a fillerand determine the influence of the concentration of graphene and graphene weight ratio against the compressive strength, porosity, and morphological properties of geopolimer. The making of geopolimer include the preparation of fly ash and sand and then continued with the creation of alkaline activator (KOH + sodium silicate) with variation concentration ofgraphene 10 mg/ml, 20 mg/ml, 30 mg/ml, as well as the weight ratio of graphene 0 %wt, 0.1 %wt, 0.4 %wt, and 0.7 %wt. Raman Spectroscopy Analysis of graphene shows graphene produced during the process turbulance assisted shear exfoliation (TASE) is a few layer graphene (FLG). XRD analysis showed the highest intensity of graphene on geopolimer is1849.26 cts on 25.4112 °. The SEM analysis showed the increasing graphene, closer the structure of geopolymer. The value of compressive strength in addition concentrations of graphene 30 mg/ml and weight ratio of graphene 0.7 wt% i.e. 10.8 MPa with an increasingcompressive strength 74.19%. The value of the lowest porosity on the concentration of graphene 30 mg/ml and weight ratio of graphene 0.7% i.e. 5.92%.Keywords : fly ash, geopolimer, graphene, OPC, TASE
Pengaruh Siklus Pencelupan-Pengeringan Pada Pembuatan Film Tipis Tembaga Oksida Berbasis Nitrat Dengan Konsentrasi 0,4M Sebagai Solar Selektif Absorber Septian, Handika; Amri, Amun; Herman, Syamsu
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Solar Selective Absorber (SSA) is a thin film at the coating surface of the collector that absorbs solar radiation selectively and convert it into maximum heat energy. Solar selective absorber can be synthesized using sol-gel dip-coating method. The purpose of research is to synthesize the thin film of copper oxide solar selective absorber from copper nitrate precursor using sol-gel dip coating methode, to know the influence dipping-drying cycle variation to absorptance value. Pieces of aluminum with size 2x4x0.5cm were cleaned using a solution of phosphoric acid 10% at temperature 50oC for 10 minutes. Sol precursor was prepared by disolved copper nitrate trihidrate 0,4M and propio nic acid in ethanol. The sol prekursor was stirred for 2 hours at room temperature. The coating was synthesized by varying the number of dipping-drying cycles 1x, 2x, 3x, 4x, 6x, 8x and 10x, then annealed at temperature 550 ºC for 1 hour. Reflektance spectra in the area of UV-Vis-NIR show that increased cycles of dip-coating increase the value of absorptance (α). The results showed that the highest absorptance value found in coatings which was synthesized using copper oxyde 0.4M at 10x cycles with absorptance (α) = 74.32%.Keywords : dip-coating, energy, film, solar selective absorber, sol-gel
The performance of surface barrier discharge in magnetic field driven by half bridge series resonance converter Murdiya, Fri; Febrizal, Febrizal; Amri, Amun
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 8, No 2 (2017)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2927.997 KB) | DOI: 10.14203/j.mev.2017.v8.95-102

Abstract

This paper reports an application of a series resonance converter as a high voltage generator to drive a surface barrier discharge with a magnetic field. The high voltage was about 5 kV with the frequency of 25 kHz. It was connected to circular aluminum plates as the anode electrode and a rectangular aluminum plate as the cathode electrode. These electrodes were separated by a glass dielectric as the barrier. The experiment result indicated that the discharge current with magnetic field was lower than without magnetic field. The plasma on the surface barrier with magnetic field was more luminous than without magnetic field. It also indicated that the area of Lissajous diagram for the surface barrier discharge with magnetic field was slightly decreased than without magnetic field. It could be concluded that the magnetic field affects the plasma progress on the surface barrier. Molecular dynamic (MD) could be used in understanding the ionization process of air molecules. The ionization energies for CO2, N2, and O2 were 0.0502 kcal/mol, 0.0526 kcal/mol and 0.430 kcal/mol, respectively in 1,000 seconds. The highest ionization energy was O2.
Pengaruh Konsentrasi Grafena Oksida Dan Curing Temperature Pada Sintesis Mortar Geopolimer Berbasis Limbah Palm Oil Fly Ash (POFA) Najib, Ahmad Ainun; Amri, Amun; Olivia, Monita
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

This research aims to study the effects of graphene oxide addition and curing temperature toward the compressive strength of Palm Oil Fly Ash (POFA) based geopolymer. Matrixes were prepared by mixing treated palm oil fly ash and fine aggregate and continued by preparing alkali activator of 10 M sodium hydroxide and 33,3 mL sodium silicate also different concentration of graphene oxide (0 mg/mL, 1 mg/mL and 3 mg/mL) were mixed for 1 hour. Solid and liquid were mixed together with ratio 0,39 and placed them in geopolymer mortar mold (50 mm x 50 mm x 50 mm) which were cured at room temperature for 1 hour and heated them in oven for 24 hours at different temperature (40oC, 60oC and 80oC). The highest compressive strength was 11.4MPa yielded by adding 3mg/mL of graphene oxide at 80oC.Keywords: compressive strength, curing temperature, geopolymer, graphene oxide, palm oil fly ash
Pelapisan Hidroksiapatit Pada Stainless Steel 316L Menggunakan Metode DIP Coating Dengan Variasi Rasio Binder Pati Sagu Dan Waktu Pengadukan Hidayah, Putri Husni; Fadli, Ahmad; Amri, Amun
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Utilization of stainless steel 316L as bone implant could be done by coating hydroxyapatite on it’s surface, to obtain a material with good biocompatibility and mechanical strength. The purpose of this research is to coating hydroxyapatite on stainless steel 316L using starch asbinder and understand the influence of binder ratio and stirring time on characters of coating hydroxyapatite deposited by dip coating method. Stainless steel was cut into size 2×3cm2 and sterilized with acetone. The substrat then dipped into solution which consist of 10 gram hydroxyapatite, 20 gram aquadest and starch 1; 1,25 and 1,5 gram. The substrat wasdried at 110oC for 30 minutes and then sintered at 800oC for 1 hour. The result of SEM analysis showed that at 16 and 20 hour stirring time the coating thickness increased from 35μm to 77 μm. At 24 hour stirring time the obtained thickness was decrease to 60 μm. The coating thickness decreased with binder ratio, at binder ratio addition the thickness obtainedwas 60 μm, 58 μm and 35 μm, respectively. The shear strength was increase with binder ratio. While increasing stirring time decreased the shear strength. The highest shear strength obtained is 3,07 MPa. The layer that deposited on the substrat is contain 99,4% hydroxyapatite based on XRD analysis result.Keywords : Binder, Dip Coating, Hydroxyapatite, Stainless Steel.
Pengaruh Penambahan Zat Aditif Graphene Terhadap Karakteristik Lapis Tipis Aspal Pasir (Latasir) A Putra, Rahmat Ade; Shalahuddin, Muhammad; Alwinda, Yosi; Amri, Amun
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Latasir or a thin layer of asphalt sand is a pavement surface covering consisting of fine aggregates or sand or a mixture of both hard and asphalt mixed, stretched and compacted under certain conditions. Itis often used on the streets as light as local roads or road environment, in order to restrain the rate of water so as not to enter into pores in it. One of the efforts made to improve the quality of asphalt pavementby modifying the mixture material with the addition of certain additives. Graphene is thought to be able to become another asphalt addictive. Several previous studies used Grpahene in various reinforcementstructures. The purpose of this study was to determine the value of Marshall characteristics in the mixtureof Latasir A using graphene addictive. Variation made in this study were 0% (without mixture), 2%, 2.5%, and 3% for the presentation value of asphalt density as a comparison of the value of stability, flow, VMA, VIM, VFA and MQ. The results of this study indicate that the addition of graphene as an addictive to the asphalt mixture tends to increase the value of stability, the value of melt (flow) so that it becomesmore elastic because it is above the specification limit, and not too much increase in the value of the VIM, VMA, VFA, and Marshall Quotient (MQ) value. For the best Marshall Characteristics, the addition ofgraphene is 3% and the optimum asphalt content (KAO) is 8,50% with a stability value of 580 kg, flow value of 4.10%, VIM 4.50%, VFA 79.00%, VMA 22.30% and MQ 140.00 Kg / mm.Keywords: graphene, additives, Latasir, Marshall Characteristics
Co-Authors AA Sudharmawan, AA Abdul Rasyid Amrin Abid, Hussein Rasool Achmad Noerkhaerin Putra Adrianto Ahmad Affandi Affandi Ahmad Fadli Ahmad Fadli Ahmad Fadli Aisyah Dewi Ranti, Aisyah Dewi Akbar, Irfan Sarhadi Alfarizi, Cory Dian Ali Novia Altarawneh, Mohammednoor Aman Aman Aman aman Aman, Azka Aminati, Ikha Setya Amir Awaluddin Amri, Evelyn Andrizal Andrizal Ani Suryani Anjani, Putri Annisa Rahmat Apriadi Rio Ari Sandhyavitri Arisman Adnan Assylzhan, Mazhibayev Azhar, Muhammad Rizwan Azhari Harahap Azridjal Aziz Bahri, Ahmad Syaiful Bahruddin Bahruddin Bahruddin Bahruddin Bahruddin Benny Ahmadi Bona Tua Chairul Chairul Chairul Damayanti, Elok Deden Saprudin Dedeng Hermoyo Derry Hanriansyah Pratama Desi Heltina Dhini Octavianty Dimas Nofriyan Dwi Setyo Pambudi, Yoyok Ekawati, Lestari Elmira, Kambarova Erliza Hambali Esty Octiana Sari Esty Octiana Sari Eva Rantika Evelyn Evelyn Evelyn Evelyn Evelyn Evi Nadhifah Fabryza, Dhina Fajar Restuhadi Fajrina Qaishum Fakhri, Fakhri Fauziyah, Hidayatul Febri Riandi Febrizal Ujang Febryza, Dhina Feby Pratama Nugraha Fesya Putri, Andini Firman syah Fitri, Lara Ismano Fitria, Anisa Fri Murdiya, Fri Gilang Fathurrahman Gilda Miranda Gussyafri Hasnul Bustaman Hawa, Karfika Ainil Hawa, Karfika Ainil Hendri, Yola Bertilsya Hendro Ekwarso Heni Sugesti Heri Rahmana Indra Yasri Irwan Irwan Is Sulistyati Isna Rahma Dini Iwantono Iwan Barnawi Jhon Armedi Pinem Jiang, Zhong Tao Jumbri, Khairulazhar Karfika Ainil Hawa Khairat Khairat Khairat Khusnul Ain Komalasari Komalasari Komalasari Komalasari Lisa Legawati Lucy Rahmawati M. Fauzan Akbar M. Iwan Fermi Malindo, Muhammad Eri MAYANG SARI Mayangsari Mayangsari Meliagustin, Adilla Michael Hutapea Miran, Hussein A. Mochamad Reizal Ath Thariq Monita Olivia Muhamamad Rizky Zuriadi Muhammad Shalahuddin Muhammad Shalahuddin Muhammad Sugandi Muhammad Zaqi Muhdarina Nisa Mulya Novan, Andre Novia Azzahra Nurhayati Nurwijayanti Nurwulandari Saputri Ohi, Hiroshi Oktariandi, Vito Paul Destin Purba Peratenta Sembiring, Maria Perdana, Rendy Putra Peter Peter Prawiranegara, Barata Aditya Puji Rahmawati Dwi Sukma Putra, Rahmat Ade Putri Arini Putri Husni Hidayah, Putri Husni Putri, Diana Eka Rahayu, Ricky Puji Rahmadahana, Suci Rahman, M. Mahbubur Rahmansyah Rahmansyah Rahmat Kurniawan Nasution Rahmi, Sri Wahdini Ramadhan Ramadhan Rani Handayani Reni Yenti, Silvia Reski, M. Rifati Hanifa Rino Rinaldi Rizka Aulia Hardi, Rizka Aulia Rizky, Muhammad Dian Rozanna Sri Irianty Russita Martani Russita Martani Rusydy ' Salma Liska Saputra, Adika Saputra, Fakhri Sari Rahma Yanti Sari, Esty Octiana Sarma, Deki Septian, Handika Setia Utama, Panca Setiani Br Manurung Silvia Reni Yenti Silvia Reni Yenti Suci Afrianti Sukoco Sukoco Sukoco Sukoco SUNARNO Sunarno Sunarno Sunarno SYAIFUL BAHRI Syamsu Herman Syelvia Putri Utami Syukri Hamdani Tafrikhatul Walidah Tao Jiang, Zhong Utama, Panca Setia Voadi, Salsabilla Diva Wilda Zakiah Windy Odelia Putri Wira Irawan Rossani Wisrayetti Wisrayetti Wisrayetti Wisrayetti Wisrayetti, Wisrayetti Wulandari, Revika Yang, Chun-Chen Yelmida Azis Yolanda, Yogi Yopalim Zanstra Yosi Alwinda Yosi Alwinda, Yosi Yusnimar Sahan Z Zulfansyah Zikri, Ahmed Zuchra Helwani, Zuchra Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar, Zultiniar Zuqni Meldha