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Properties of Platinum Sub-Nanoclusters on Graphene Nano Sheets at Cathode Siburian, Rikson; Bukit, Minsyahril
Jurnal Matematika dan Sains Vol 19 No 1 (2014)
Publisher : Institut Teknologi Bandung

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

The catalytic activities of Pt subnano-clusters on graphene nanosheets (GNS) for oxygen reduction reaction (ORR) catalysts have been examined. The ORR activity of Pt on GNS (0.99 V) is higher than on carbon black (CB) commercial catalyst (0.94 V versus RHE). A core level shift of Pt 4f in XPS indicates that Pt is chemically interacted with GNS. It has been ascribed to difference in the interface interaction between Pt and graphene via different strength of the π–d hybridization. Keywords: Pt, Graphene nanosheet, Pt subnano-clusters, ORR. Sifat-sifat Pt Sub-Nanocluster pada Graphen Nano Sheets (GNS) di Katoda Abstrak Aktivitas katalis dari Pt subnano-kluster dengan menggunakan material pendukung graphen nano-sheet (GNS) untuk katalis reaksi reduksi oksigen (RRO) telah diuji. Aktivitas RRO dari Pt/GNS (0.99 V) lebih tinggi dari katalis komersial Pt CB (0.94 V versus RHE). Pergeseran tingkat pusat Pt 4 f pada data XPS mengindikasikan bahwa terjadi interaksi kimia antara Pt dan graphen melalui hibridisasi π–d. Kata kunci: Pt, Graphen nano-sheet, Pt subnano-kluster, RRO.

Isolasi dan Identifikasi Komponen Utama Minyak Atsiri dari Kulit Buah Jeruk Manis (Citrus sinensis L.) Asal Timor, Nusa Tenggara Timur Siburian, Rikson
Jurnal Natur Indonesia Vol 11, No 1 (2008)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Isolation and identifications of peel orange oils (Citrus sinensis, L.) which maserased by lard, coconut oil and mixof lard-coconut oil ( 2 : 1) has been done. This research aimed to obtain main component of peel orange oils fromTimor, knowing influence of lard, coconut oil and mix lard-coconut oils whom using as maserate to results ofchemistry components and atsiri’s oil rendemen product. In this research has been done by using maseration,extraction and using FT – IR and GC – MS as characterizations instruments. The results showed D- Limonen as amain component of atsiri oil from peel orange’s Timor.

Application of coconut battery waste to graphic as an alternative electrode on primary battery cells Siburian, Rikson; L Raja, Saur; Supeno, Minto; Simanjuntak, Crystina
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2019): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Coconut shell is one of the potential biomass as carbon sources. Coconut shell is converted to charcoal through the carbonization process. The potential of charcoal from coconut shells can be synthesized into graphene. Graphene is a derivative of one of the carbon allotropes, namely graphite, where carbon is in the form of thin plates with sp2 orbitals arranged hexagonally. The process of making graphene which is coconut shell dried in the sun then pyrolysis into charcoal then mixed with activated carbon as a reducing agent at 600 Â° C for 1 hour to produce graphene. The graphene produced is characterized by X-Ray Diffraction (XRD), Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX). The results by XRD analysis showed the resulting peaks were not sharp and slightly widened at the diffraction peaks at 24 Â° and 44 Â°. The results of SEM-EDX analysis at 4000x magnification show the surface size and shape of the structure that is smaller, thinner and reduced buildup on the graphene structure. graphene that has been successfully synthesized was tested on a coin battery. The coin battery cathode which was replaced with graphene succeeded in turning on the light.

Quick detection of sabbles by using marquis treatment Sihotang, Herlince; Ginting, Adil; Siburian, Rikson; Simanjuntak, Crystina
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2019): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Methamphetamine or N-methyl-alpha-methyl phenethyl amine is a powerful central nervous system stimulant drug that has an addictive effect when consumed. The number of cases of drug abuse in Indonesia in the last year is most dominated by methamphetamine so that an accurate analysis is needed to detect these compounds. Qualitative rapid detection can be done with marquis reagents which will produce a yellowish green if it is positive for consuming methamphetamine. Student urine samples were extracted with chloroform to separate to form two layers. The top layer filtrate was tested by Marquis reagents. From the test results found no positive Methamphentamine in the urine of class XI IPA students.

Fabrication and Optimization of Primary Batteries Using Ni/Graphene Nanosheet Electrodes Tarigan, Kerista; Siburian, Rikson; Sitorus, Erika Arta Mevia; Purba, Frikson Jony; Manik, Yosia Gopas Oetama
Science and Technology Indonesia Vol. 9 No. 2 (2024): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.2.413-426

This study aims to investigate the impact of varying the mass ratio of Ni to Graphene Nano Sheets (GNS) and how incorporating GNS affects the performance of a primary battery prototype (Ni/GNS//electrolyte//GNS). The primary battery prototype was developed using both impregnation and alloy methods. Different mass ratios of Ni/GNS to electrolyte to GNS were tested, including ratios of 1:2:1 (A), 2:2:1 (B), 1:2:2 (C), 2:1:2 (D), and 1:1:2 (E). The characterization of GNS, Ni/GNS, and the primary battery prototype involved using X-Ray Diffraction (XRD) and Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX) instruments. A multimeter was employed to measure electrical conductivity, energy density, and power density. A potentiostat/galvanostat was used to measure cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). XRD analysis showed a broad and weak peak at 2θ= 24.32° for GNS, confirming its successful synthesis. Additionally, a peak at 2θ = 43.5° indicated effective deposition of Ni on the GNS surface in Ni/GNS. The SEM-EDX results supported the XRD findings, showing regularly spaced pores and a thin surface layer in GNS. Notably, white spots on the graphene surface in Ni/GNS indicated successful Ni deposition. In terms of electrical conductivity, the highest value was observed in the primary battery prototype for sample D (2:1:2), which measured 1.11 S/cm2. These results were also supported by measurements of energy density and power density in sample D, which achieved the highest values among all samples, with 144,788 Wh/kg and 252,500 W/kg, respectively. Moreover, the CV and EIS measurements remained stable at 0.30 kΩ and 0.88 kΩ, suggesting that GNS could potentially conduct electrons owing to its electrical conductivity.

EDUKASI PENANAMAN TANAMAN SAYUR KANGKUNG MENGGUNAKAN HORMON DAN PUPUK ORGANIK CAIR SKALA RUMAH TANGGA Nasution, Lita; ,, Risnawati; Ranita, Sylvia Vianty; Lubis, Riadini Wanty; ,, Fitria; Susanti, Rini; Julia, Hilda; Ginting, Sri Malem; Siburian, Rikson; Kemal, Isthifa
Journal of Community Research and Service Vol 8, No 2: JULY 2024
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jcrs.v8i2.62224

Aisyiyah ialah salah satu organisasi perempuan Muslim terbesar di Indonesia. Dengan mengambil hal yang sesuai, rata-rata ibu-ibu yang mengikuti Aisyiyah adalah ibu rumah tangga. Dengan menggunakan sistem semai dan juga menggunakan pupuk organik cair, mampu membuat seluruh warga yang ikut dapat memahaminya dengan mudah. Metode yang dilakukan ialah dengan langsung terjun ke lapangan untuk memberikan pengarahan secara lansgung kepada warga yang datang. Memberikan penjelasan detail bagaimana cara melakukan sistem semai kangkung darat dengan mudah. Hasil yang didapat ialah dengan memberikan eduikasi cara penyemaian yang sesuai dan kapan benih bisa ditanam di tanah secara langsung, sebelum itu direndam dahulu dengan menggunakan pupuk organik cair merek Basill Nigr. Maka dapat disimpulkan bahwa penyuluhan secara langsung seperti ini dapat dilakukan dengan semaksimal mungkin untuk membuat para warga mampu memahami dan juga bertanya secara langsung apabila ada hal yang tidak dapat dipahami.

CONDUCTIVITY ANALYSIS OF CU/N-GRAPHENE AND NI/N-GRAPHENE AS ELECTRODES ON PRIMARY BATTERY ANODES Simanjuntak, Crystina; Siburian, Rikson; Jiamin, Amanda
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 8 No. 1 (2024): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51544/kimia.v8i1.5325

This study used a modified Hummer method to synthesize Graphene and nitrogen dopant to produce N-Graphene. Cu/N-Graphene and Ni/N-Graphene electrodes were each made using the impregnation method. Conductivity analysis of graphene, N-graphene, Cu/N-Graphene, and Ni/N-Graphene was carried out using a multimeter. The conductivity data of Cu/N-Graphene (83.16 µS/cm) and Ni/N-Graphene (85.67 µS/cm) produced were higher than commercial battery anodes (26 µS/cm). These data prove that N-graphene can improve the performance of Cu/N-Graphene and Ni/N-Graphene on primary battery anodes and can be used as an alternative anode on primary battery anodes.

Synthesis of Biochar-Like Graphene Nanosheets (BLG) from Candlenut Shells with Integrated Conductive and Antibacterial Functionalities Samosir, Friscilla Romiduk; Yahya, Mohd Fakharul Zaman Raja; Siburian, Rikson
Indonesian Journal of Chemical Analysis (IJCA) Vol. 8 No. 2 (2025): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol8.iss2.art7

Graphene’s exceptional electrical, mechanical, and chemical properties have enabled breakthroughs in electronics, energy storage, and biomedicine, yet large-scale, low-cost, and sustainable production methods remain elusive. Here, we report a facile, scalable route to synthesize Biochar-Like Graphene Nanosheets (BLG) from candlenut shell biomass using activated carbon as a dual-function reducing agent and combustion inhibitor in a modified muffle furnace pyrolysis system. Structural analysis by X-ray diffraction and Fourier-transform infrared spectroscopy confirms the formation of defect-rich, low-oxygen sp² carbon networks, while scanning electron microscopy reveals wrinkled layered morphologies that promote electrolyte accessibility. Electrical measurements demonstrate a voltage-dependent conductivity, reaching 368.67 μS·cm⁻² at 1.5 V, alongside stable power density (6.72 W·kg⁻¹) and high energy density (403.2 Wh·kg⁻¹), indicative of excellent charge transport and storage capabilities. Remarkably, BLG exhibits potent antibacterial activity against Salmonella typhimurium with a 10.76 ± 0.23 mm inhibition zone and positive MIC and MBC responses, attributed to synergistic membrane disruption, reactive oxygen species generation, and electron transfer effects. This biomass-to-graphene strategy offers a sustainable, multifunctional nanomaterial platform for next-generation energy, environmental, and biomedical technologies

AIR QUALITY MONITORING OF KALABAHI-ALORâ€™S SEAPORT-EAST OF NUSA TENGGARA Rikson Siburian; Minsyahril Bukit; Herlince Sihotang; Saur Lumban Raja; Minto Supeno; Cristina Simanjuntak; Nurhaida Pasaribu; Sri Pratiwi Aritonang
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 3 No. 2 (2018): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Evaluation of environment of seaport is needed as well as our responsibility to nature sustainability. The Alorâ€™s seaport belongs to Pelindo III. In order to know the air quality of Alorâ€™s seaport, we did this study. Our aims are to know level quality of air at Alorâ€™s seaport and compare to the government regulation. This study refers to Pararosaniline (SOx), Saltzman (NOx), Particle Calculation (dust) and decibel (noisy) methods. We used four locations, those are A-1 (Entrance gate of PELINDO (8013â€™09.12â€S, 124031â€™07.21â€E)); A-2 (In front of passengers terminal (8013â€™08.75â€S, 124031â€™01.60â€E)); A-3 (Exit gate Kalabahiâ€™s seaport (8013â€™08.2â€S, 124031â€™00.87â€E)) and A-4 (In front of port of the people (8011â€™09.12â€S, 124031â€™07.21â€E)). Results show that the averages level of SOx, NOx and dust of A-1, A-2 and A-3 are 103.01, 104.65 and 107.47 (Âµg/Nm3), 37.87, 30.62, and 39.73 (Âµg/Nm3), 56.64, 47.47 and 50.72 (Âµg/Nm), respectively. On the other hand, the level of noisy of A-1, A-2, A-3 and A-4 are 68.76, 65.69, 65.20 and 73.60 (dBA), respectively. Base on all of data, we conclude that the air quality of Alorâ€™s seaport is still appropriate according to government regulation (PP. No. 4, 1999).

Application of coconut battery waste to graphic as an alternative electrode on primary battery cells Siburian, Rikson; L Raja, Saur; Supeno, Minto; Simanjuntak, Crystina
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2019): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Coconut shell is one of the potential biomass as carbon sources. Coconut shell is converted to charcoal through the carbonization process. The potential of charcoal from coconut shells can be synthesized into graphene. Graphene is a derivative of one of the carbon allotropes, namely graphite, where carbon is in the form of thin plates with sp2 orbitals arranged hexagonally. The process of making graphene which is coconut shell dried in the sun then pyrolysis into charcoal then mixed with activated carbon as a reducing agent at 600 Â° C for 1 hour to produce graphene. The graphene produced is characterized by X-Ray Diffraction (XRD), Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX). The results by XRD analysis showed the resulting peaks were not sharp and slightly widened at the diffraction peaks at 24 Â° and 44 Â°. The results of SEM-EDX analysis at 4000x magnification show the surface size and shape of the structure that is smaller, thinner and reduced buildup on the graphene structure. graphene that has been successfully synthesized was tested on a coin battery. The coin battery cathode which was replaced with graphene succeeded in turning on the light.

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