Article Per Year (5 Year)
p-Index From 2020 - 2025
1.383
P-Index
This Author published in this journals
All Journal AUSTENIT Jurnal Zeolit Indonesia IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Science and Technology Indonesia Jurnal Penelitian Sains Ahsana: Jurnal Penelitian dan Pengabdian kepada Masyarakat
Nirwan Syarif, Nirwan
Universitas Sriwijaya
Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Education Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

Published : 9 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 9 Documents
Search

 1 
THE DYNAMICS MOLECULER OF WATER MOLECULE ABSORPTION IN SILICATE ZEOLITE Syarif, Nirwan
Jurnal Zeolit Indonesia Vol 6, No 2 (2007)
Publisher : Jurnal Zeolit Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (117.338 KB)

Abstract

The water molecule dynamics absorbed at silicalite zeolite was studied with molecule dynamics technique using the computer. This paper reports the effect of temperature on behavior of dynamic system. The result showed the improvement of diffusion coefficient and diffusion activation energy along with the improvement of temperature. Improvement of temperature cause the change of the contact distance of the water molecule in zeolite molecule.
The Influence of Catalyst Loading on Electrocatalytic Activity and Hydrogen Production in PEM Water Electrolysis Rohendi, Dedi; Amelia, Icha; Sya'baniah, Nyimas Febrika; Yulianti, Dwi Hawa; Syarif, Nirwan; Rachmat, Addy; Fatmawati; Majlan, Edy Herianto
Science and Technology Indonesia Vol. 9 No. 3 (2024): July
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.2024.9.3.556-564

Abstract

The climate change caused by the widespread and continuous use of fossil fuels is a problem that needs to be addressed urgently. One of the solutions offered is through an energy transition towards the use of new or renewable and low-carbon fuels. Hydrogen gas as a carrier of energy is an alternative solution that has attracted the attention of researchers, due to its high combustion energy and environmental friendliness. The production of hydrogen gas using the Proton Exchange Membrane Water Electrolysis (PEMWE) method is considered effective for large-scale production. This study investigates the impact of catalyst loading and various current densities on hydrogen production in the PEM water electrolysis process, utilizing the Cu2O/C catalyst. This study investigates the impact of catalyst loading and different current densities on hydrogen production in the PEM water electrolysis process, utilizing the Cu2O/C catalyst. The electrode catalytic properties were evaluated using the Cyclic Voltammetry (CV) method to determine the Electrochemical Surface Area (ECSA) and the Electrochemical Impedance Spectroscopy (EIS) method to determine the electrical conductivity. The ECSA and EIS measurements demonstrated that the best results were obtained at a higher catalyst loading of 2 mg/cm2 with an ECSA value of 0.21 m2/g and electrical conductivity of 3.04 × 10−6 S/cm. The production of hydrogen results showed that the highest hydrogen production rate was 3.75 mL/s with a catalyst loading of 2.5 mg/cm2, indicating that increasing the load could lead to a higher rate of hydrogen gas production, but this is highly dependent on the surface area utilized. Additionally, at higher current densities, the cell resistance in the electrolysis process may decrease, leading to reduced electrode efficiency for hydrogen production. Thus, the use of high currents may not always be advantageous in hydrogen production using the PEM water electrolysis method.
Hydrogen Production from Aluminum Waste Using the Aluminum-Water Method with Potassium as Activator Amelia, Icha; Rohendi, Dedi; Rachmat, Addy; Syarif, Nirwan; Yulianti, Dwi Hawa; Sya'baniah, Nyimas Febrika; Adhiyanti, Nurmalina; Adelia, Ory; Normah, Normah
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 9, No 2 (2024): June 2024
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v9.i2.111

Abstract

Research on hydrogen production from aluminum waste using the aluminum-water method using potassium as an activator has been successfully carried out. This research aims to determine the performance of the potassium activator in hydrogen production with variable water volume and potassium percentage. Hydrogen gas production is carried out using 60 mesh aluminum waste. Optimum conditions were achieved when a mass of 1 gram of aluminum was reacted with an additional volume of water of 1.5 mL, and 7% w/w of the activator mass, with the production of hydrogen gas of 553 mL at a production rate of 69 mL/minute.
Penambahan Eco-Enzym Pada Pembuatan Sabun Cair untuk Menjaga Kesehatan Kulit di Desa Burai Kecamatan Tanjung Batu Kabupaten Ogan Ilir Desnelli, Desnelli; Riyanti, Fahma; Eliza, Eliza; Hidayati, Nurlisa; Syarif, Nirwan; Yuliasari, Nova
Ahsana: Jurnal Penelitian dan Pengabdian kepada Masyarakat Vol. 3 No. 1 (2025): Februari 2025 - Ahsana: Jurnal Penelitian dan Pengabdian kepada Masyarakat
Publisher : Indonesian Scientific Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59395/ahsana.v3i1.374

Abstract

Sabun cair digunakan sebagai pembersih dengan media air. Bahan yang ditambahkan pada sabun cair seperti pewangi, pelembab, antiseptik, penambah busa dan lain lain. Antiseptik merupakan zat yang bisa membasmi atau menghambat pertumbuhan kuman seperti virus, bakteri atau jamur. Bahan antiseptik dapat berupa bahan kimia atau bisa juga bahan alami yang mengandung zat antiseptik seperti lidah buaya, daun sirih, eco-enzym dan lain lain. Eco-enzyme mempunyai arti enzim ramah lingkungan mengandung asam asetat, dan berbagai enzym seperti lipase, tripsin, amilase yang mampu membunuh bakteri patogen sehingga dapat digunakan sebagai bahan antiseptik pada sabun. Kegiatan Pengabdian pada masyarakat berupa penyuluhan dan praktek pembuatan sabun cair dilaksanakan di desa Burai Tanjung Batu, Ogan Ilir. Peserta umumnya ibu ibu dan remaja putri yang berjumlah sekitar 20-30 orang. Metode pembuatan sabun cair dengan eco-enzym sangat mudah dipahami oelh peserta dan memberikan peluang membuka usaha pembuatan sabun cair antiseptik.
The Antioxidant Potential of Kecombrang (Etlingera elatior) Solihah, Indah; Syarif, Nirwan; Resmiyani, Ubbadah; Rasyid, Riana Sari Puspita; Suciati, Tri
Jurnal Penelitian Sains Vol 26, No 2 (2024)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56064/jps.v26i2.1028

Abstract

Kecombrang (Etlingera elatior) is one of the native plants of Indonesia.E.elatioris used as a condiment, food, medicine, and ornament. The antioxidant properties of rhizomes, leaves, and flowers ofE.elatiorhas not been reported. This study aimed to explore the antioxidant capacity of the rhizome, leaves, and flowers ofE.elatiorin extracts and fractions. The rhizome, leaves, and flower ofE.elatiorwere macerated by ethanol 96% to generate crude extract. The crude extract was fractionated by n-hexane, ethyl acetate, and ethanol 96% to generate n-hexane, ethyl acetate, and ethanol fraction. The total phenolic compound was determined spectrophotometrically using the follin-ciocalteau color complex. The antioxidant effect of extracts and fractions ofE.elatiorwas evaluated using DPPH scavenging activity. The largest total phenolic compound ofE.elatiorwas in the ethanolic fraction of flower (298.47mgGAE/100g), and the lowest was in a crude extract of rhizome (61.80mgGAE/100g). The very strong antioxidant capacity (IC50value <50ppm) was in crude extract, n-hexane fraction of rhizome, and an ethanolic fraction of leaves. The strong antioxidant capacity (IC50value: 50-100 ppm) was crude extract and all fractions of flower; ethyl acetate and an ethanolic fraction of rhizome; crude extract, n-hexane, and ethyl acetate fraction of leaf.The conclusion of this study is that, depending on the type of solvent, the type of antioxidant compounds being extracted and antioxidant capacity also vary.
Penambahan Eco-Enzym Pada Pembuatan Sabun Cair untuk Menjaga Kesehatan Kulit di Desa Burai Kecamatan Tanjung Batu Kabupaten Ogan Ilir Desnelli, Desnelli; Riyanti, Fahma; Eliza, Eliza; Hidayati, Nurlisa; Syarif, Nirwan; Yuliasari, Nova
Ahsana: Jurnal Penelitian dan Pengabdian kepada Masyarakat Vol. 3 No. 1 (2025): Februari 2025 - Ahsana: Jurnal Penelitian dan Pengabdian kepada Masyarakat
Publisher : Indonesian Scientific Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59395/ahsana.v3i1.374

Abstract

Sabun cair digunakan sebagai pembersih dengan media air. Bahan yang ditambahkan pada sabun cair seperti pewangi, pelembab, antiseptik, penambah busa dan lain lain. Antiseptik merupakan zat yang bisa membasmi atau menghambat pertumbuhan kuman seperti virus, bakteri atau jamur. Bahan antiseptik dapat berupa bahan kimia atau bisa juga bahan alami yang mengandung zat antiseptik seperti lidah buaya, daun sirih, eco-enzym dan lain lain. Eco-enzyme mempunyai arti enzim ramah lingkungan mengandung asam asetat, dan berbagai enzym seperti lipase, tripsin, amilase yang mampu membunuh bakteri patogen sehingga dapat digunakan sebagai bahan antiseptik pada sabun. Kegiatan Pengabdian pada masyarakat berupa penyuluhan dan praktek pembuatan sabun cair dilaksanakan di desa Burai Tanjung Batu, Ogan Ilir. Peserta umumnya ibu ibu dan remaja putri yang berjumlah sekitar 20-30 orang. Metode pembuatan sabun cair dengan eco-enzym sangat mudah dipahami oelh peserta dan memberikan peluang membuka usaha pembuatan sabun cair antiseptik.
The Influence of Hydrogen Flow Rate and Humidifier Temperature on Performance of a PEMFC with Ti-Co/C Catalyst Adhiyanti, Nurmalina; Rohendi, Dedi; Utama, Muhammad Prima; Syarif, Nirwan; Rachmat, Addy; Yulianti, Dwi Hawa; Normah, Normah
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 3 (2025): October 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

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

Abstract

This study explores the effect of hydrogen flow rate and humidifier temperature on the performance of the Membrane Electrode Assembly (MEA) using Ti-Co/C catalyst at the cathode and Pt/C at the anode in a single-cell Proton Exchange Membrane Fuel Cell (PEMFC). MEAs were fabricated by the spraying method and characterized using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) to determine their electrochemical surface area (ECSA) and conductivity. The results showed that the optimized ECSA value reached 8.38 cm2/g, and the electrical conductivity was 3.76 × 10-8 S/cm. The best performance was achieved at a hydrogen flow rate of 100 mL/min and room temperature humidification. Under the hydrogen flow rate test, the maximum power density reached 0.364 mW/cm2, while in the humidifier temperature variation, a maximum power density of 0.375 mW/cm2  was obtained at a current density 2.4 mA/cm2. These findings suggest that Ti-Co/C is a promising low-cost catalyst alternative to Pt and that operational conditions play a critical role in MEA performance
Preparation of Palm Kernel Shell Binchotan for Radio Frequency Energy Harvesting Sya'baniah, Nyimas Febrika; Syarif, Nirwan; Rohendi, Dedi; Rachmat, Addy; Syahputra, Rio Aldo
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 3 (2025): October 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

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

Abstract

Research on the development of radio frequency energy harvesting slabs from palm kernel shells binchotan has been done. The slabs were characterized by using XRD and FTIR intrumentations to determine their crystallography and functional groups. The electrical response of slabs was measured on impedance spectroscopy instrumentation. The conductivity, impedance, and dielectric constant were calculated from impedance spectroscopy data. Diffractograms showed crystalline carbon and confirmed with the existence of peaks, at 2θ, 24.5° and 44.56°. FTIR analysis showed that carbon palm shells have the absorption length is in the range of wave numbers 1100 – 1200 cm-1 for CO of carboxylic acid, aldehyde, ketone and ester, from 1475 to 1600 cm-1 for C=C aromatic ring and double peaks in 1900 – 2100 cm-1 for conjugated C-C. The slabs conductivity varies from 1 to 7 mScm-1. Impedance values for the slabs vary from 1.5 to 2.4 ohm. Dielectric constants for the slabs range from 0.42 to 140.
PERFORMANCE ANALYSIS OF LiVO3-Ion BATTERY WITH CARBON (Ipomoea Aquatica) AS ANODES Sucia, Arini; Haryati, Sri; Syarif, Nirwan
AUSTENIT Vol. 14 No. 1 (2022): AUSTENIT: April 2022
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v14i1.4559

Abstract

This research was conducted by utilizing water spinach which is found in swampy areas as new material for support in battery. Water spinach stems were separated used as carbon precursor. The carbon was prepared through hydrothermal and pyrolysis processes.  The battery was constructed using the carbon anode  and cathode from  LiVO3. The LiVO3 was produced by using hydrothermal process of LiCl, V2O5, and NaOH in 200ºC 30 bar for 16 hours. The performance of the battery was evaluated using cyclic voltammetry and galvanostatic charging – discharging methods on potentiostat. The electrolyte used was LiCl in liquid or gel electrolyte with concentrations of 10%, 20% and 40%, respectively. The binders were used PU and melamine. Material characterization reveal that the carbon has crystaline phase, conductivity and pores which therefore carbon has the capability to be used as anode precursor. The evaluation of battery performance showed that the highest current value was found in battery with 40% LiCl of liquid electrolyte and  polyurethabe binder, that is 0.22 A. The highest power 5.36 x   W, energy 1.80 x  Wh, and capacity  ​8.94 x  F  was found in battery with 40% LiCl of liquid electrolyte with binder PU.. The lowest battery discharge slope 0.0039 was found in 40% LiCl of liquid electrolyte with PU binder. These findings provides an alternative to the use of materials in Lithium ion batteries without compromising the performance of their application.
Co-Authors Addy Rachmat Adelia, Ory Adhiyanti, Nurmalina Amelia, Icha Arini, Feggy Dedi Rohendi Desnelli Desnelli Edy Herianto Majlan, Edy Herianto Eliza Eliza Fahma Riyanti Fatmawati Fatmawati Heni Yohandini Hermansyah Hermansyah Normah Normah, Normah Nova Yuliasari Nurlisa Hidayati Rasyid, Riana Sari Puspita Resmiyani, Ubbadah Solihah, Indah Sri Haryati Sucia, Arini Syabaniah, Nyimas Febrika Syahputra, Rio Aldo Tri Suciati Utama, Muhammad Prima Yulianti, Dwi Hawa