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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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Peluruhan Batang Grafit Baterai Bekas Dengan Metode Electrochemical Exfoliation Menggunakan Pelarut Amonium Sulfat Dan Kalium Sulfat Michael Hutapea; Amun Amri; Rozanna Sri Irianty
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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One way to exfoliate the graphene is by electrochemical exfoliation graphite (EEG) method which is the method for graphene synthesis by splitting graphite material into graphene sheets through the electrochemical process. The objective of this research is to synthesis graphene from used battery graphite rod using [(NH4)2SO4] and (K2SO4) and to determinethe effect of solvent variation and solvent concentration on the graphite decay rate. The results showed that the increase of solvent concentration increased the yield. The highestyield for the solvents [(NH4)2SO4] and (K2SO4) were 10,6% and 15,3% repectively. The result of UV-Vis spectrophotometric wave peak was ~270 nm that indicating the peak of graphene.Raman spectroscopy analysis result showed that the graphene was nanoplatelet (multi-layer) and the number of graphene layers was ~3-10 layer. FTIR analysis showed the functionalgroups after decay process on graphite. The best conductivity was K2SO4 solvent 1,5 M is 0,0621 Ω-1.cm-1.Keywords: electrochemical exfoliation graphite, graphene, graphite.
Pembuatan Prototip Dye Sensitized Solar Cell (DSSC) Berbasis Zat Warna Buah Senduduk (Melastoma Malabathricum L.) : Pengaruh Suhu Sintering TiO2 Dan Konsentrasi Elektrolit Wilda Zakiah; Amun Amri; Ahmad Fadli
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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Increasing demand of energy consumption enforces the development of alternative energy source to solve the world energy crisis. Dye Sensitized Solar Cell (DSCC) is a promising alternative for solar cell application of future generation which is based in semiconductors that utilizes photoelectrochemical phenomenon as basic principle to generate electricity. This research tries to make DSSC prototype with dye from melastome fruit (Melastoma Melabathricum L.). The examined variables are TiO2 sintering temperature at 300oC, 350oC, 400oC, and electrolyte concentration 0.025M, 0.05M and 0.075M of iodine. On the first step, the dye was made by diluting 20 gr of melastome fruit in aquadest, methanol, and acetic acid. Next, the coating of TiO2 by solving TiO2 powder in ethanol and deposited on spin coater and sintered by using furnace. Then the making of carbon electrode, making of electrolyte, and finally characterization of DSSC. UV-Vis spectroscopy examination result showed that melastome fruit contains anthocyanin that was proved from absorbance on wavelength of 515 nm. DSSC voltage examination showed that the higher TiO2 sintering temperature and electrolyte concentration, then the voltage generated was higher as well. The highest voltage was showed on sample with iodine electrolyte concentration of 0,075 M which is 2,385 Volt/cm2. Morphollogy test showed that TiO2 coating has porous structure with equal particle dispersion on every increment of TiO2 sintering temperature. XRD examination showed that the coating is in anatase phase and adhesion test showed that DSSC with highest voltage has adhesivity of 3B (Good).Key Word : dye sensitized solar cell (dssc), dye, electrolyte, tio2
Pembuatan Mortar Geopolimer Berbasis Palm Oil Fly Ash-Grafena (Pofa-Grafena) Dengan Variasi Rasio Pofa/Pasir Dan Berat Grafena Yola Bertilsya Hendri; Amun Amri; Rozanna Sri Irianty
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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Geopolymer mortar is a mortar produced by reacting a high concentrated alkaline solution with precursors containing high alumina and silica contents. The use of geopolymer mortar can replace the use of ordinary portland cement (OPC) in the construction industry. Thisresearch aims to synthesize palm oil fly ash (POFA) based geopolymer mortar with the addition of graphene nanosheets, to determine the effect of POFA-to-sand composition ratio, and variations of graphene to mechanical properties and morphology of geopolymer mortar. The research was conducted by varying the ratio of POFA-to-sand (1:0, 1:1, 1:2, and 2:1 by mass ratio), variations of graphene (0, 0,1, 0,35, and 0,5% by weight), curing time (24 h) and curing temperature (60℃). Scannning Electron Microscope (SEM) analysis showed that the addition of sand and graphene reduced the porosity of geopolymer mortar. The compressivestrength test results showed that the highest compressive strength (16,4 MPa) was obtained at POFA-to-sand ratio of 2:1 and 0,5% wt graphene content. While the lowest compressive strength (5,4 MPa) was obtained at the POFA-to-sand ratio of 1:2 and 0% wt graphenecontent.Keywords: alumina, silica, alkaline activator, crystalline, geopolymerization
Pengaruh Jumlah Penambahan Graphene Nanosheets (GNSs) Dan Gliserol Terhadap Sifat Mekanis Coating Komposit Berbasis Polyvinyl Alcohol (PVA) Abdul Rasyid Amrin; Amun Amri; Aman Aman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Polyvinyl alcohol (PVA) based conductive coatings composite wih the addition of graphene nanosheets (GNSs) have been successfully synthesized. Composites were synthesized using the solution mixing method and were tested their conductive properties, mechanical properties (tensile strength, elongation at break, and young modulus), morphology, and functional group analysis. The results showed that the addition of graphene increased the electrical conductivity, tensile strength, and Young modulus, but decreased elongation at break composite coating. Addition of glycerol increased elongation at break, but decreased the electrical conductivity, tensile strength, and Young modulus. The highest electrical conductivity was 1.11 x 10-3 s/m obtained by adding 3% graphene, the highest tensile strength was 25,894 MPa obtained by adding 3% graphene, the highest elongation was 250.862% obtained by adding 2%wt glycerol, and the highest modulus young was 18,496 MPa obtained by adding 3% graphene. Based on the results of the study, the PVA-based conductive composite coating with the addition of graphene nanosheets has a good perspective to develop further. Keywords: coating composite, glycerol, graphene, PVA
Konversi Termal Kayu Ketapang (Terminalia Catappa) Menjadi Bio-Oil Dengan Teknologi Pirolisis Menggunakan Katalis Ni/Lempung Yopalim Zanstra; Syaiful Bahri; Amun Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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This research aims to produce bio-oil from ketapang (Terminalia catappa) as an alternative fuel. Variables studied the effect of the weight ratio of the catalyst Ni / clay to the biomass, the influence of the metal impregnation Nickel (Ni) on clay and characterization of physical and chemical properties of bio-oil produced. Pyrolysis process carried out at a temperature of 320°C, silinap 500 ml, 50 grams of biomass with + 100-200 mesh sieve size, variations in the catalyst Ni / clay to the biomass of 3%, 6% and 9% by weight and the variation of Ni metal Impregnation against Clay at 0% , 1%, 2%, 3%. The results was analyzed by using Gas Chromatography Mass Spectroscopy (GCMS) and showed the largest yield of bio-oil on the use of catalyst Ni/clay 6% by weight of the metal content of 3% at 71,1%. The physical properties characterization of bio-oil were obtained 0.79 g/ml for density, 2.1982 cSt for viscosity , 68.193 mg NaOH/g sample for acidity and 54oC for flash point. For the chemical properties characterization of bio-oil were obtained some dominant chemical components such as acetic acid , 2-propanone , glycidol, and 1-Hydroxy-3-sulpho-6-aminonapthalene.Keywords : Bio-Oil,Catalyst Ni/Clay,Ketapang,GCMS,Pyrolysis.
Peningkatan Sifat Mekanis Mortar Geopolimer Abu Terbang Batubara Dengan Penambahan Grafena Rahmat Kurniawan Nasution; Amun Amri; Jhon Armedi Pinem
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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This study aims to observe the influence of graphene addition to the mechanical properties of coal fly ash based geopolymers. The procedure of research consisted of raw materials preparation including the graphene synthesis via Turbulence Assisted Shear Exfoliation (TASE) method, alkali activators solution preparation, and finally moulding and curing process of geopolymer mortar. The results showed that the compressive strength of geopolymer increased while the porosity and the water absorption decreased along with the addition of graphene. The highest compressive strength, the smallest porosity and the smallest water absorption, namely 15.228 MPa, 18.498 % and 10 % respectively was exhibited by sample synthesized using 20 mg/mL of graphene and curing temperature of 80 oC. The presence of graphene in the Geopolymer matrix increases the compressive strength properties of the Geopolymer mortar. Keywords : alkali activators, geopolymer, graphene, matrix, TASE
Aplikasi Shringking Core Model (SCM) Pada Reaksi Deasetilasi Kitin Menjadi Kitosan Mochamad Reizal Ath Thariq; Ahmad Fadli; Amun Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
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Chitosan is derived from chitin compound used in the biomedical field. Chitosan can be synthesized from ebi waste.Chitosan can be produced by chemichal methods through the deproteinasi process, the demineralization process and the deacetylation process.in this research, Ebi powder was reacting with NaOH 3.5% (deproteinasi), ratio 1:10 (w/v) for 2 hours stirring by 150 rpm. The product reacted with HCl 1 N (demineralization), ratio 1:15 (w/v) for 1 hour stirring by 150 rpm. Then product was reacting using NaOH 50% (deacetylation), ratio 1:20 (w/v) at a temperature of 100oC, 110oC and 120oC with stirring by 150 rpm for 2 hours. Samples were taken every 10 minutes rise as much as 10 mL, washed until pH neutral and dried. Deacetylation degree of chitosan analyzed using acid-base titration method. The highest degree of deacetylation of the chitosan will be 71.68% to 80.28% at a temperature of 100-120oC. The best reaction kinetics model to describe the occur in the synthesis of chitosan is a model of ash layer (chitosan) to control.Keywords: deacetylation, reaction kinetics, chitosan, waste ebi, shrinking, core model.
Coating Hidroksiapatit Pada Logam Stainless Steel 316L Menggunakan Metode DIP Coating Dengan Variabel Temperatur Sintering Dan Komposisi Air Dalam Suspensi Putri Arini; Ahmad Fadli; Amun Amri
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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Stainless Steel 316L is metal that can be used as a bone plate, but it has low biocompatibility. To achieve better biocompatibility with bone, Stainless Steel 316L can be coated with hydroxyapatite. Hydroxyapatite (HA) is the main inorganic phase of human bone with a composition around 65% of our bone. Dip coating techniques was used to applyhydroxyapatite into Stainless Steel 316L. Stainless Steel 316L with a size of 2x1x0,1 cm was dipped into a suspension containing HA, sago starch and water mixed with a rate of 250 rpm for 20 hours. Suspension were prepared with compositions 16 gram, 18 gram and 20 gram aquadest. And then coating HA were dried in oven at temperature 110 °C for 30 minutes.Coating HA were sintered at temperatures of 600°C, 700°C and 800 °C for 1 hour. SEM observation showed that the thickness of HA coating composition of 20 gram, 18 gram and16 gram increased in the range of 42 – 144 μm. Maximum shear strength obtained in this research was 11,78 MPa.Keywords : Coating, Dip Coating, Hydroxyapatite, Stainless Steel 316L
Pengaruh Konsentrasi Graphene Nanosheets Dan Foam Agent Terhadap Kuat Tekan Bata Ringan Cellular Lightweight Concrete (CLC) Eva Rantika; Amun Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Cellular lightweight concrete (CLC) is a material obtained by inserting air bubbles into the lightweight concrete mixture, where the air granules are able to maintain the bubble structure during the curing process. The use of lightweight concretes may reduce the construction costs and make the working process becomes easier. This study aims to make CLC with the addition of graphene nanosheets as an additive to improve the compressive strength and thermal resistance of CLC. This research begain by making the graphene, preparing the sand as fine aggregate, foaming agent, cement, and distilled water then ended with making the light concretes by adding grapheme (1%, 3% and 5%) with the ratio of the foaming agent: water of (1:20, 1:30, 1:40). The morphological results showed an increase in the cavity that was formed with the addition of the foaming agent : water. The results obtained at 5% graphene concentration in the ratio of the foaming agent : water (1:30) were for compressive strength of 2.5 MPa at a density of 1196 grams with the results of porosity and water absorption of 10.431% and 9.119%. The thermal resistance test at 700 ° C reached a compressive strength of 0.5 Mpa.Keywords : Additive, CLC (Cellular Lightweight Concrete), Foaming Agent, Graphene
Geopolimer Berbasis Abu Terbang (Fly Ash) Boiler Pabrik Pulp Dengan Penambahan Grafena Oksida Setiani Br Manurung; Amun Amri; Syamsu Herman
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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Geopolymer has been successfully synthesized from boiler fly ash with the addition of Graphene Oxide (GO). The addition of graphene oxide is to enhance the mechanical properties of organicfly ash based geopolymer. Graphene oxide was made by using graphite from used batteries via Hummer method. The resulting graphene oxide solution was mixed with an alkaline activatorsolution (NaOH and Na2Si2O3) and stirred with a mixture of fly ash and sand. Once homogeneous, it was then poured into the mold and heat treated at temperature 900C for 24hours. A compressive strength test was performed using material testing equipment. The experiment results showed that the compressive strength of geopolymer with addition of GO wasincrease 44,67% in comparison with the geopolymer without GO. This results is very exciting to upgrade the quality of organic fly ash based geopolymer to reduce the use of conventionalcement due to of high carbon emission/polutant of conventional cement. In addition, this research can also reduce the abundant fly ash waste and overcome the accumulation of used batteries.Keywords: compressive strength, geopolymer, graphene oxide, hammer, fly ash
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