Article Per Year (5 Year)
p-Index From 2021 - 2026
1.745
P-Index
This Author published in this journals
All Journal HAYATI Journal of Biosciences Jurnal Pengolahan Hasil Perikanan Indonesia JURNAL KIMIA SAINS DAN APLIKASI INDONESIAN JOURNAL OF APPLIED PHYSICS ALCHEMY Jurnal Penelitian Kimia Jurnal Kimia Terapan Indonesia Indonesian Journal of Chemistry Jurnal Sains Terapan : Wahana Informasi dan Alih Teknologi Pertanian Bulletin of Chemical Reaction Engineering & Catalysis LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI JURNAL REKAYASA KIMIA & LINGKUNGAN
Komar Sutriah
Department Of Chemistry, FMIPA, IPB University Jalan Tanjung Kampus IPB, Dramaga, Babakan, Dramaga, Bogor, Jawa Barat, 16680, Indonesia
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering Environmental Science Materials Science & Nanotechnology Physics Social Sciences Veterinary

Published : 15 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 15 Documents
Search

 1   2 
Synthesis and Characterization of HDTMA-Br Modified TiO₂/ZnO/CuO Photocatalyst Composite for Photodegradation of Textile Dye (Methyl Orange) Fatika, Siti; Sutriah, Komar; Khotib, Mohammad
Jurnal Kimia Sains dan Aplikasi Vol 28, No 8 (2025): Volume 28 Issue 8 Year 2025
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.28.8.436-441

Abstract

Methyl orange exhibits low biodegradability and is difficult to remove from aqueous solutions. Photodegradation using photocatalysts offers an efficient and practical alternative for treating methyl orange dye waste. Among various semiconductor materials, TiO₂ and ZnO have attracted considerable attention due to their strong photocatalytic activity. However, excessive use of TiO₂ can lead to turbidity in the solution, reducing light penetration and consequently diminishing the efficiency of the photoreduction and photooxidation processes. Numerous studies have been conducted to control the structure, morphology, and porosity of TiO₂ to enhance its photocatalytic performance. One effective approach involves the incorporation of surfactants into composites, which can modify the optical properties, structure, and morphology of the material, thereby improving its ability to degrade methyl orange. In this study, the composite was synthesized using the precipitation method. The highest degradation efficiency of 44% was achieved at 50 minutes for a methyl orange concentration of 30 mg/L, with a composite ratio of 1:1:0.3 and an HDTMA-Br concentration of 2 CMC. The addition of HDTMA-Br enhanced the photocatalytic performance by reducing electron–hole recombination, resulting in a band gap energy of 2.87 eV within the visible light range (1.77–3.1 eV).
Kinetika dan termodinamika komposit HAp-Fe3O4 dari cangkang tutut (Bellamya javanica) sebagai adsorben Pb(II) pada limbah akumulator: Kinetics and thermodynamics of HAp–Fe₃O₄ composite from tutut snail shell (Bellamya javanica) as Pb (II) adsorbent in battery wastewater Iswara, Muhammad Dicky; Sutriah, Komar; Charlena, Charlena
Jurnal Pengolahan Hasil Perikanan Indonesia Vol. 28 No. 11 (2025): Jurnal Pengolahan Hasil Perikanan Indonesia 28(11)
Publisher : Department of Aquatic Product Technology IPB University in collaboration with Masyarakat Pengolahan Hasil Perikanan Indonesia (MPHPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17844/gczc9396

Abstract

Peningkatan jumlah kendaraan listrik dan perkembangan industri otomotif telah menyebabkan akumulasi limbah akumulator bekas yang mengandung logam berat berbahaya, khususnya Pb(II). Jika tidak ditangani dengan baik, limbah ini dapat mencemari lingkungan dan membahayakan kesehatan manusia dan ekosistem. Adsorpsi menggunakan material berbasis hidroksiapatit (HAp) menjadi salah satu metode penanganan yang efektif. Cangkang tutut (Bellamya javanica), limbah biomineral yang kaya akan kalsium karbonat (CaCO3) berpotensi dimanfaatkan sebagai prekursor kalsium pada sintesis HAp. Penelitian ini bertujuan menentukan kondisi optimum pada pH, waktu, suhu, dan konsentrasi komposit HAp-Fe3O4 sebagai adsorben ion timbal Pb(II), menentukan seberapa efisien adsorben komposit HAp-Fe3O4 dalam mengadsorpsi ion timbal, menentukan parameter kinetika dan termodinamikanya dalam proses adsorpsi, serta memberikan solusi material ramah lingkungan dan berkelanjutan yang dapat diimplementasikan untuk mengurangi kandungan logam berat pada lingkungan yang dihasilkan dari limbah akumulator. Komposit disintesis melalui metode deposisi kimia. Hasil karakterisasi menunjukkan struktur berpori dengan luas permukaan 3002 m2/g, ukuran pori 2,21 nm, dan volume pori 3,32 cc/g. Optimasi menunjukkan kondisi optimum pada pH 6, waktu kontak 50 menit, suhu 25°C, dan konsentrasi awal 10 ppm. Studi kinetika mengikuti model pseudo-order-dua (K2 = 2,23 g/mg·menit), mengindikasikan adsorpsi kimia. Parameter termodinamika ( ΔG°<0, ΔH°<0, ΔS°>0) menunjukkan proses spontan, eksoterm, dan disertai peningkatan entropi. Model isoterm Freundlich menunjukkan kesesuaian terbaik (1/n = 0,82; KF = 467). Aplikasi terhadap limbah akumulator menunjukkan efisiensi adsorpsi 99,23%, menurunkan Pb(II) dari 2,28 ppm menjadi 0,017 ppm, sesuai baku mutu Permen LH No. 5 Tahun 2014. Komposit ini menunjukkan potensi tinggi sebagai adsorben logam berat yang efektif dan berkelanjutan.
TiO2/ZnO/CuO/HDTMA-Br Composite for Photodegradation of Oxidative Compounds of Used Cooking Oil (UCO): Photodegradation of Free Fatty Acids and Peroxides Pitaloka, Adinda; Sutriah, Komar; Mulijani, Sri; Khotib, Mohammad
Bulletin of Chemical Reaction Engineering & Catalysis 2026: BCREC Volume 21 Issue 2 Year 2026 (August 2026)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20554

Abstract

Used cooking oil (UCO) contains peroxide and FFA, which can impede UCO processing and lower the quality of downstream products. The majority of pretreatment techniques currently in use have drawbacks, such as excessive chemical use. An alternative that is more successful and efficient is photocatalysis. No research has been conducted on the photodegradation of UCO using TiO2/ZnO/CuO/HDTMA-Br composites. Precipitation was used to create the composite. The TiO2/ZnO/CuO composite has a high crystallinity, specifically 74.54% in the 1 CMC-modified catalyst, according to the characterization results. The spectrum of the synthesized TiO2/ZnO/CuO composite showed the presence of H2O and CO2 groups in addition to the primary groups of TiO2, ZnO, and CuO. Additionally, the 1 CMC modification increased pore volume and surface area. The surfactant-modified composite exhibited a more consistent morphology, as observed by SEM analysis. The best results from photocatalytic testing at different temperatures, times, and surfactant concentrations were obtained at 120 °C for an hour with a surfactant concentration of 1 CMC. These results show that degradation using TiO2/ZnO/CuO photocatalysts can lower the FFA and peroxide contents of UCO by 65% and 59%, respectively, under ideal conditions. This study focuses on FFA and peroxide value parameters as a preliminary investigation into alternative UCO pretreatment solutions. Copyright © 2026 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Performance of Doped Montmorillonite on Photosensitizer Based Natural Dyes Gardenia Jasminoides Mulijani, Sri; Sutriah, Komar; Syahbirin, Gustini; Shabrina, Shabrina
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 1 (2022): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i1.54786

Abstract

Dye Sensitized Solar Cell (DSSC) is an electrochemical cell that is able to convert solar energy from light to electrical energy. This technology is needed by the world as a renewable and environment friendly energy. In this study, we evaluate the consideration of modification montmorillonite and Gardenia jasminoides dyes may achieve better performance of DSSC by manufactured DSSC with modified TiO2 semiconductors using montmorillonite (MMT) and Nafion. Performance of DSSC was determined by potentiometer. Atomic force microscope was used to evaluate the characteristic of DSSC. The UV-vis results revealed that the dyes which is extracted from the Gardenia jasminoides content crocin and quercetin compounds. Modification DSSC contains ratio of MMT: nafion (50:50) exhibited highest power conversion efficiency value of 0.8316%. Topography of surface ensured the dyes have occupied surface area and able to promote electron to higher energy.  However, MMT and nafion capable to enhance potential of dyes as photosensitizer in DSSC. 
Facile Synthesis of Composite Chitosan and Durio zibethinus Seed and Its Applications as Adsorbent of Metal Ion Ni(II) Putri, Silvia Devi Eka; Mulijani, Sri; Sutriah, Komar
ALCHEMY Jurnal Penelitian Kimia Vol 19, No 2 (2023): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.19.2.65948.197-209

Abstract

Nickel is one of the most dangerous heavy metals that impact water ecosystems and human health. In the study, natural and harmless composite materials such as biochar and chitosan were modified to build adsorbent composites and form optimal conditions for the adsorption of nickel heavy metal ions from contaminated wastewater. Biochar was prepared from Durio zibethinus seeds by hydrothermal method to form nanopowder. It was treated with acid, while chitosan was designed as nanopowder by hydrothermal method, also without acid treatment. Composite adsorbents were prepared by mixing biochar and chitosan with a ratio of 4:3 (w/w). Fourier Transform Infrared characterizes composite materials as adsorbents, biochar, and chitosan. The surface morphology of the adsorbent was evaluated by scanning electron microscopy. Furthermore, Langmuir, Freundlich, and Temkin isotherms determine the adsorbent's performance. In addition, batch adsorption experiments were carried out to measure the effect of solution pH, adsorbent dosage, and initial concentration of metal ions. Nickel ion adsorption by the composite adsorbent showed an adsorption capacity of 26.69 mg/g, a maximum removal efficiency of 89.39% at optimum conditions of pH 6, an adsorbent dose of 0.5 g, and a contact time of 200 minutes. This adsorption capacity was better than chitosan and durian seed adsorbents. The nickel ion adsorption process by composite adsorbent shows a pattern in the Temkin isotherm model. In contrast, the chitosan and Durio zibethinus seed adsorbents tended to follow the Langmuir and Freundlich isotherm models. In addition, the adsorption kinetics of the composite material showed pseudo-second-order kinetics, and the reaction was exothermic.
Co-Authors . TRIVADILA Charlena Denar Zuliandanu Dodi Irwandi Dyah Iswantini Eko Prasetyo Fatika, Siti Gustini Syahbirin Hestuti Eni Hestuti Eni Iswara, Muhammad Dicky M. Syamsul Maarif Mohammad Khotib Muhammad Khotib Muljani, Sri Muljani, Sri Nina Hartati Obie Farobie Pitaloka, Adinda Putri Permatasari Putri Permatasari, Putri Putri, Silvia Devi Eka Rut Novalia Rahmawati Sianipar Shabrina Shabrina, Shabrina Sri Mulijani Sri Muljani Sugesti, Rahmawita SUMINAR SETIATI ACHMADI Tetty Kemala Tun Tedja Irawadi Tun Tedja Irawadi Zainal Alim Mas&#039;ud Zainal Alim Mas’ud Zainal Alim Mas’ud Zainal Alim Mas’ud