Garuda - Garba Rujukan Digital

p-Index From 2020 - 2025

2.195

P-Index

This Author published in this journals

All Journal JURNAL KIMIA SAINS DAN APLIKASI Jurnal Ilmu Kimia Universitas Brawijaya Physics Student Journal Natural B The Journal of Pure and Applied Chemistry Research JURNAL INTEGRASI PROSES Jurnal Kimia dan Kemasan Chimica et Natura Acta Molekul: Jurnal Ilmiah Kimia JPPM (Jurnal Pengabdian dan Pemberdayaan Masyarakat) Fullerene Journal of Chemistry Acta Chimica Asiana Jurnal Kimia dan Kemasan ARRUS Journal of Engineering and Technology Makara Journal of Science Indonesian Journal of Fundamental Sciences Indonesian Mining Journal

Rachmat Triandi Tjahjanto

Chemistry Department, Faculty Of Mathematics And Natural Sciences, University Of Brawijaya, Jl. Veteran 65145 Malang, Indonesia

Author-ID : 404074

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

Published : 60 Documents Claim Missing Document

Claim Missing Document

Articles

2 3 4 5 6

Konversi Sitronelal Menjadi Senyawa Isopulegol dengan Katalis ZnBr2/β-Zeolit Khoirun Nisyak; Elvina Dhiaul Iftitah; Rachmat Triandi Tjahjanto
Jurnal Kimia dan Kemasan Vol. 39 No. 2 Oktober 2017
Publisher : Balai Besar Kimia dan Kemasan

Pada penelitian ini telah dilakukan konversi sitronelal menjadi senyawa isopulegol melalui mekanisme reaksi siklisasi dengan katalis ZnBr2/β-Zeolit. Sitronelal diisolasi dari minyak sereh wangi dengan metode distilasi fraksional. Katalis ZnBr2/β-Zeolit dibuat dengan metode impregnasi pada temperatur 400 ºC di bawah aliran gas nitrogen selama 4 jam. Reaksi konversi sitronelal dilakukan dengan metode one-pot synthesis dengan aliran gas nitrogen pada temperatur 120 ºC. Karakterisasi katalis ZnBr2/β-Zeolit dilakukan dengan analisa X ray- Diffraction (XRD) dan Scanning Electron Microscopy- Energy Dispersive X-ray (SEM-EDX). Karakterisasi produk reaksi dilakukan kromatografi gas (GC) dan Gas Chromatography-Mass Spectroscopy (GC-MS). Berdasarkan hasil penelitian, katalis ZnBr2/β-Zeolit memberikan aktivitas lebih baik dibandingkan β-Zeolit, dimana nilai konversi sitronelal menjadi isopulegol sebesar 100% dengan selektivitas terhadap senyawa isopulegol sebesar 75,28% pada temperatur 120 0C dan waktu reaksi 60 menit.

Study of Ozone Synthesis With Methods of Plasma Discharge Rachmat Triandi Tjahjanto; Sri Wardhani; Ulfa Anggraini
Natural B, Journal of Health and Environmental Sciences Vol 1, No 3 (2012)
Publisher : Natural B, Journal of Health and Environmental Sciences

In this research an ozonator prototype has been built to produce ozone, consists of air pump, gas flowmeter, an ozone reactor, and a glass pipe of nozzle. The most important part of the device is the reactor which consisting three main parts; 5 mm alloy electrode connected to a high voltage generator in the form of electrical gas stove lighter, 1 mm copper negative electrodes connected to the ground and a glass plasma discarge. The ozone gas formed is flowed to a container consisting of methyl orange solution 20 ppm at wave lenght of 470 nm. The concentration of ozone is determined by spectrophotometry method. The ozonator is characterized by ozonation periode variation of 5, 10, 15, 20, 25, and 30 minutes with the voltage used 3,5 volt, voltage variation of 3, 4, and 5 volts and flow rate variation of 227, 363, 464, 662, 864, and 1060 mL/min at the voltage used 3.5 volt. The result showed that the longer period and the higher voltage used for ozonation, the higher the ozone gas produced. The concentration of ozone obtained in this research is 0.76 ppm reached at 363 mL/min with 20 minutes ozonation duration.

Study of Hydrogen Sulfide Adsorption on Silica Gel with Triethanolamine layer I Wayan Adi Suarya; Rachmat Triandi Tjahjanto; Ulfa Andayani
The Journal of Pure and Applied Chemistry Research Vol 11, No 1 (2022): Edition January-April 2022
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2022.011.01.653

Hydrogen sulfide (H2S) is an impurity in gaseous fuels, therefore this gas removal method is interesting topic. Physisorption method is considered to a simple work to be applied on a small scale. The principle of physisorption is the combination of a substrate and a physical solvent to capture H2S gas. This research studies the impact of the addition of liquid triethanolamine on the porous silica on the adsorption capacity of H2S gas. The silica substrate is synthesized using two pore templates namely a mixture of polyethylene glycol (PEG)/ sodium dodecyl sulphate (SDS) and the other one is pure chitosan. Silica surface was coated with triethanolamine (TEA) using impregnation method. H2S gas adsorption study was conducted on the synthesized silica with and without TEA. The results of this study show that TEA layer on the silica surface increases the adsorption capacity towards H2S gas, but it is relatively small compared to similar studies. The best result of combining TEA and silica gel is shown by TEA- sil-PS which was 3.8 x 10-5 mol H2S per gram of adsorbent. The calculated surface area of the sil-PS is 6.64 m2/g or 98.6% reduction from the initial value 451.4 m2/g. The increase in adsorption capacity despite a very large decrease in surface area indicates the effectiveness of TEA in absorbing hydrogen sulfide.

Membranes of Nata de coco-nanoparticles Fe3O4 For Diazinon Sensors Didik Pramana; Ani Mulyasuryani; Rachmat Triandi Tjahjanto
The Journal of Pure and Applied Chemistry Research Vol 7, No 3 (2018): Edition September-December 2018
Publisher : Chemistry Department, The University of Brawijaya

Development of diazinon sensors using mixed membranes of nata de coco and Fe3O4 nanoparticles on the SPCE (screen printed carbon electrode) surface has been carried out potentiometrically. The design of the sensor begins with the optimization of Fe3O4 nanoparticles added to the membranes of 50%, 67% and 75% while pH optimization using pH 4-5 acetate buffer and phosphate buffer pH 6-7. The diazinon sensor of the result has been tested at range concentration of 10-12 - 10-5mol.L-1. The results showed that the best sensor performance was 67% Fe3O4 nanoparticles and pH 5. The Nernst factor was 34.5 mV / decade, the detection limit value of 1,3 x 10-9mol.L-1 in the range concentration of 10-11 - 5x10-8 molL-1 with a response time of 140 seconds.

Photocatalytic Degradation of Methylene Blue Using TiO2-Natural Zeolite as A Photocatalyst Sri Wardhani; Moh. Farid Rahman; Danar Purwonugroho; Rachmat Triandi Tjahjanto; Christiana Adi Damayanti; Ika Oktavia Wulandari
The Journal of Pure and Applied Chemistry Research Vol 5, No 1 (2016)
Publisher : Chemistry Department, The University of Brawijaya

TiO2 - zeolite photocatalyst has been prepared by impregnation of TiO2 onto acid -activated natural zeolite. The XRD data confirmed that natural zeolite used in this work is predominated with mordenite and clinoplitolite types, whereas anatase type can be attributed to TiO2. The highest performance of TiO2 – zeolite, which is indicated by surface area of 13.304 m2/g and band gap energy of 3.15 eV, is obtained when 10 mmol of TiO2 is impregnated onto the zeolite. The ability of this photocatalyst is evaluated by examining degradation of methylene blue (MB) in the presence of UV source. The effects of MB concentration, pH and UV irradiation time on the degradation are studied in a batch reactor. It is interesting since the addition of H2O2 can improve the degradation effeciency of MB. The optimum result is achieved at pH 11, duration of UV irradiation of 50 min, showing degradation amount of 98.25 %. Surprisingly, the chemical oxygen demand (COD) in the degraded MB aqueous solution can be reduced about 77.9%, exhibiting the improvement of water quality. No loss of the activity of the degradation efficiency after reusability of this TiO2 - zeolite photocatalyst for at least 4 times.

The Influence of Conditioning Agent on Phosphate Diffusion Coefficient through Polyacrylamide and Agarose Gel Layta Dinira; Barlah Rumhayati; Rachmat Triandi Tjahjanto
The Journal of Pure and Applied Chemistry Research Vol 2, No 2 (2013)
Publisher : Chemistry Department, The University of Brawijaya

Excess phosphate in natural water can cause algae grow rapidly, to the extent causing many fish deaths that led to the extinction of certain species. Therefore, an analysis or periodic observations of phosphate levels in the water is needed. The commonly used method is diffusive gradient in thin films (DGT) technique. The DGT technique is based on the ability of analyte to diffuse through a gel, which have a value named diffusion coefficient. This research was conducted in order to study the effect of different storage solution to the phosphate diffusion coefficient through polyacrylamide and agarose gels. Initial research performed with making the polyacrylamide and agarose gels. To observe the effect of different storage solutions, the gels partly stored in distilled water gel while the others are stored in a NaCl solution of 0.01 M. Phosphate diffusion coefficient was determined using Fick's Law after analyze the phosphate concentration using UV-Visible spectrophotometer. The results showed that phosphate diffusion coefficient was highest when polyacrylamide and agarose gels stored in NaCl solution of 0.01 M.

ELEKTRODA SUPERKAPASITOR BERBAHAN NANOKOMPOSIT MNO2/AC DARI LIMBAH PLASTIK DENGAN TEKNIK ELEKTRODEPOSISI I Wayan Wira Yuda; Faisal Maulana Malik Ibrahim; Masruroh Masruroh; Nik Matul Ula; Vita Valiana; Rachmat Triandi Tjahjanto
JURNAL INTEGRASI PROSES VOLUME 10 NOMOR 2 DESEMBER 2021
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/jip.v10i2.12229

Elektroda merupakan komponen penting dari sebuah superkapasitor. Pemilihan bahan elektroda dan fabrikasinya memainkan peran penting dalam meningkatkan kinerja kapasitif superkapasitor. Salah satu kriteria elektroda untuk superkapasitor adalah harus memiliki luas permukaan per satuan volume dan porositas yang tinggi, disamping elektroda harus berbiaya rendah dan ramah lingkungan. Pada penelitian ini sintesis elektroda dari nanokomposit MnO2/AC dilakukan dengan metode elektrodeposisi. Elektrodeposisi untuk menghasilkan superkapasitor dilakukan dengan variasi konsentrasi 0,25 M dan 0,5 M. Kandungan karbon diperoleh dari sintesis limbah plastik polietilen dengan metode pirolisis sedangkan MnO2 diperoleh dari elektrodeposisi sehingga elektroda yang dihasilkan dapat memenuhi dari aspek biaya rendah dan ramah lingkungan. Hasil sintesis elektroda komposit MnO2/AC dikarakterisasi dengan Fourier Transform Infra Red (FTIR), Scanning Electron Microscope (SEM)/ EDX (Energy Dispersive X-Ray), Topografi Measurement System (TMS), dan LCR 816. Hasil pengamatan menunjukkan pada elektroda dengan konsentrasi 0,25 M menghasilkan ukuran pori dan luas permukaan sebesar 10,56 nm dan 0,3626 mm2. Sedangkan pada konsentrasi 0,5 M menunjukkan ukuran pori 1,036 nm dan luas permukaan 0,3732 mm2. Kapasitansi dari sintesis ini diperoleh nilai tertinggi pada konsentrasi 0,5 M sebesar 53 F/g dengan sintesis tegangan 0,5 V. Adanya Peningkatan Mn mempengaruhi nilai kapasitansi yang dibutuhkan superkapasitor. Kata Kunci: Elektroda Superkapasitor, Elektrodeposisi, MnO2, sampah plastik, polietilen

Modification of Screen Printed Carbon Electrode (SPCE) with Fe3O4 for the Determination of Nitrite (NO2-) in Squarewave Voltammetry Erica Marista Rosida; Ani Mulyasuryani; Rachmat Triandi Tjahjanto
Molekul Vol 12, No 2 (2017)
Publisher : Universitas Jenderal Soedirman

Nitrite is one of the food preservatives that the government permits, but on the use of over limits can cause endanger health, so it is necessary to control the content of nitrite in the food. Modification of electrodes on a screen printed carbon electrode (SPCE) with Fe3O4 has been successfully done for determination of nitrite. Modification of the electrode has been done by electrodeposition with cyclic voltammetry. Electrodeposition successfully performed with an electrolyte solution of FeCl3 in ethanol. Selection of the optimum drying temperature modified electrode obtained based on the respond of the solution of nitrite in Britton Robinson buffer pH 8. The result of the modification electrode used for the determination of nitrite with squarewave voltammetry method. Reaction between Fe3+ with nitrite a basis for determining nitric indirectly measured so that the peak current is the peak current of Fe3+ of about 0,55 V vs Ag/AgCl. The results showed nitrite measurements with this method has a detection limit of 1.3 x 10-8 M.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24817/jkk.v39i2.3306

Analisis Kandungan Oksida Logam Clay Alam Kabupaten Pangkep Provinsi Sulawesi Selatan sebagai Bahan Dasar Pembuatan Keramik Berpori Gelcasting Suriati Eka Putri; Abdul Rahman; Diana Eka Pratiwi; Ahmad Fudhail Majid; Rachmat Triandi Tjahjanto
Jurnal Kimia Fullerene Vol 6 No 2 (2021): Fullerene Journal of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v6i2.339

The purpose of this study was to analyze the metal oxide content in natural clay in Pangkep Regency, South Sulawesi Province, which will be used as the basic material for making gelcasting porous ceramics. One of the basic ingredients for making ceramics is alumina silica metal oxide. This metal oxide is found in several minerals, one of which is clay minerals. The sample used in this study was natural clay in Pangkep Regency, South Sulawesi Province. The parameters studied were alumina silica content before and after natural clay was used in the synthesis of porous ceramics. The synthesis method used is the gelcasting method. The metal oxide content was analyzed using XRF and to observe the morphology of the ceramic body using SEM. The results showed that the metal oxide content for the main ceramic material in the form of alumina silica did not change significantly before and after sintering, Al2O3 was 11.98% before sintering and 11.32% after sintering while SiO2 content was 71.12% before sintering and 73.32% after sintering. It is supported by the results of the morphology of the ceramic body, natural clay that has undergone curing in the ceramic body.

Co-Authors A.A. Ketut Agung Cahyawan W Abd. Rahman Abdul Rahman Afida, Laely Nur Agus Farid Fadli Agustina Mogi Ahmad Fudhail Majid Ahmad Naufal Hasti Eka Putra Akhmad Sabarudin Alfina, Bulan Tahta Alfita Safitri Andi Nafis An Naafi Angga Fami Rayendra Anggriana Novitasari, Anggriana Ani Mulyasuryani Anjani, Ryzki Martha Anna Safitri Ardhi, Tunjung Nourman Sasono Asrianda Asrianda Barlah Rumhayati Barlah Rumhayati Christiana Adi Damayanti Danar Purwonughroho Danar Purwonugroho Danar Purwonugroho Darjito Darjito Darjito, Darjito Dhesy Galuh R. Dhesy Galuh Ratnawati Diah Mardiana Diana Eka Pratiwi Diana Eka Pratiwi Didik Pramana Dita Anggarini Eko Waluyo Elvina Dhiaul Iftitah Elvina Dhiaul Iftitah Elvina Dhiaul Iftitah Erica Marista Rosida Ernesta Wae Faisal Maulana Malik Ibrahim Faustina De Yesu Prisila Abi Finisia, Yenni Herinda Sensustania Hidayat, Rusdhi Nur I Wayan Adi Suarya I Wayan Wira Yuda Iftitah, Elvina Dhiaul Ika Oktavia Wulandari Imam Fathoni Isnaini, Yulia Nur Khoirun Nisyak Khoirun Nisyak Kiky Frederika Rumapar Lapailaka, Titus Layta Dinira Lidya Rosnita Masruroh Masruroh Masruroh Masruroh Masruroh Masruroh Masruroh MASRUROH Masruroh Masruroh Masruroh Masruroh Meirawati, Dian Mohammad Abdul Ghofur Mohammad Farid Rahman Mohammad Misbah Khunur Muchammad Zainul Anwar Muhammad Misbah Khunur Muhlis Muhlis Naat, Johnson N. Nafikah, Fifi Nik Matul Ula Nisyak, Khoirun Oktaria Ardika Pratama, Oky Yoga Purwonugroho, Danar Rendrahadi, Randhy Dwi Riska Yudhistia Asworo Rizky Arief Shobirin Roosdiana, Anna Rosmawati, Angelina Rosyida, Firdania Firdaus S.J. Iswarin Siti Mariyah Ulfa Sri Wardhani Suriati Eka Putri Ulfa Andayani Ulfa Anggraini Uswatun Hasanah Utomo, Edi Priyo Vita Valiana Widyasari, Elok Nuri Yuniar Ponco Prananto Zaemi, Haris ZAINUL ABIDIN Zulfikar, Mochammad Abrianto

Title

Found 60 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 60 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 60 Documents
Search