Article Per Year (5 Year)
p-Index From 2021 - 2026
2.522
P-Index
This Author published in this journals
All Journal Jurnal Bahan Alam Terbarukan PROSIDING SEMINAR KIMIA JURNAL ATOMIK
Hiyahara, Irfan Ashari
Unknown Affiliation
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science Materials Science & Nanotechnology

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

Found 15 Documents
Search

 1   2 
MINI REVIEW: SINTESIS DAN KARAKTERISASI NANOPARTIKEL ZnO DENGAN METODE PRESIPITASI Bergita, Angela; Hindryawati, Noor; Hiyahara, Irfan Ashari
PROSIDING SEMINAR KIMIA Vol 3 No 1 (2024): Prosiding SNK 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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

Abstract

ZnO nanoparticles are materials composed of particles ranging in size from 1 to 100 nm and can be produced through the precipitation method. This method is highly popular due to its cost-effectiveness. Numerous studies on the synthesis of ZnO nanoparticles using the precipitation method have been conducted. This mini-review aims to explore the characteristics of nanoparticles synthesized using the precipitation method. The approach employed in this journal involves a literature review of several journals focusing on the synthesis of ZnO nanoparticles through precipitation. The synthesis results in ZnO nanoparticles with sizes ranging from 4.38 nm to 1400 nm, possessing a hexagonal wurtzite crystal structure and bandgaps ranging from 3.57 to 3.7943 eV. Based on the conducted review, it can be concluded that the material that yields small-sized nanoparticles with high purity includes the precursor ZnSO4(H2O)7, deionized water as the solvent, and NH4OH as the catalyst. Keywords: Nanoparticles, Precipitation, Zinc Oxide
Pemanfaatan Smartphone Based Colorimetry Dalam Pengukuran Degradasi Metilen Biru Dengan Fotokatalitik CaO Rahman, Kamaulana Adi; Alimuddin, Alimuddin; Hiyahara, Irfan Ashari
PROSIDING SEMINAR KIMIA Vol 3 No 2 (2025): Prosiding SNKT 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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

Abstract

Water pollution caused by textile industry waste, especially methylene blue, is a problem for the environment that needs to be addressed. Photocatalysis using calcium oxide (CaO) is one of the effective and environmentally friendly methods in degrading methylene blue. This study aims to determine the effect of CaO catalyst mass and pH on the rate of methylene blue degradation using smartphone-based colorimetry. This study was conducted by varying the mass of CaO 12.5 mg, 25 mg, 37.5 mg and 50 mg and pH variations of 7, 8, 9, and 10 in a 10 mg/L methylene blue solution. Degradation was carried out with visible light from a 100 W incandescent lamp. The concentration of methylene blue was measured using smartphone-based colorimetry. The results showed that contact time and CaO mass had a significant effect on the rate of methylene blue degradation. The optimum mass of photocatalysis was 50 mg and the optimum pH was 7. Keywords : Methylene Blue, CaO, Photocatalysis, Smartphone-based colorimetry
MINI REVIEW: SINTESIS DAN KARAKTERISASI NANOPARTIKEL ALUMINIUM OKSIDA (Al2O3) DENGAN METODE PRESIPITASI Sari, Nadia Fellinda Wanda; Hiyahara, Irfan Ashari
PROSIDING SEMINAR KIMIA Vol 3 No 2 (2025): Prosiding SNKT 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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

Abstract

This review article aims to compare and analyze the latest research on the synthesis and characterization of aluminum oxide nanoparticles from inorganic waste. Aluminum Oxide (Alumina, Al2O3) is a compound formed from aluminum and oxygen. The nature of Al2O3 is resistant to corrosion. Based on a literature review, the synthesis of aluminum oxide nanoparticles can be synthesized by precipitation methods, sol-gel methods, electrolysis methods, green synthesis methods, sonochemical methods and others. The precipitation method is a method used to produce a powder that has advantages including homogeneous mixing that occurs from a reactant precipitate reduces the reaction temperature and the process of this method to synthesize metal oxide powder is very simple. This method has several disadvantages such as not being able to run well when using reactants that have different solubilities, this process is not appropriate for the manufacture of materials with a high level of purity, in addition this method does not have common synthesis conditions in the formation of several metal oxides. In this review, we will discuss the synthesis of Al2O3 nanoparticles characterization results using X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM). Therefore, this mini review reviews the development of Al2O3 characterization synthesis with precipitation method. Keywords : Synthesis, Al2O3, nanoparticles, Precipitation
MINI REVIEW: ADSORPSI NANOPARTIKEL ALUMINIUM OKSIDA (Al2O3) TERHADAP ZAT WARNA ORGANIK SINTETIK Sapira, Putri Abelia; Hiyahara, Irfan Ashari
PROSIDING SEMINAR KIMIA Vol 3 No 2 (2025): Prosiding SNKT 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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

Abstract

Aluminum oxide (Al2O3) nanoparticles are a strong and versatile material with good mechanical strength, large specific surface area, and high adsorption capacity, making it very favorable for adsorption processes. In addition, aluminum oxide is non-toxic, easy to use, and has good chemical stability. The presence of many hydroxide groups on Al2O3 nanoparticles increases their ability as adsorbents. Therefore, aluminum oxide has attracted widespread attention in the removal of pollutants from the environment, such as heavy metals, pigments, dissolved organic materials, antibiotics, and dyes. This mini review examines the latest developments regarding the use of Al2O3 nanoparticles as adsorbents for synthetic organic dyes, both cationic and anionic, such as Methylene Blue, Orange G, Acid Orange 7, and Eriochrom Black T. The discussion focuses on the efficiency and potential applications of Al2O3 nanoparticles in dye adsorption. Keywords: Adsorption, Al2O3 Nanoparticles, Dyes
Pemanfaatan Cangkang Telur Ayam sebagai Sumber CaO: Studi Karakterisasi menggunakan Fourier Transform Infrared Spectroscopy (FTIR Zahra, Marinda Afifatu; Hiyahara, Irfan Ashari; Syaima, Husna
JURNAL ATOMIK Vol 10 No 2 (2025)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v10i2.1550

Abstract

This research aims to utilize chicken eggshell waste as a raw material for producing calcium oxide (CaO) through a simple calcination method. Eggshells, which are mostly composed of calcium carbonate (CaCO₃), were calcined at 900°C for one hour. The resulting material was then characterized using Fourier Transform Infrared Spectroscopy (FTIR) to identify the presence of specific functional groups. The FTIR results showed a strong absorption peak at 602.14 cm⁻¹, indicating the presence of Ca–O bonds, which confirms the formation of CaO. However, additional peaks associated with hydroxyl (–OH) and carbonate (CO₃²⁻) groups were also detected, suggesting that some residual Ca(OH)₂ and CaCO₃ remained in the sample. This indicates that the calcination process was not fully complete, and further optimization may be necessary to improve the purity of the CaO obtained.
Co-Authors Ahmad, Atika Aulia Akbar, Muhammad Marion Arief, M. Syaiful Bergita, Angela Daniel Daniel Duratulhikmah, Nur Fadhilah Gaanty Pragas Maniam, Gaanty Pragas Hasriani Hasriani, Hasriani Husna Syaima Indriani, Isah Waliah Larasati, Zarra Udyani Nanang Tri Widodo Noor Hindryawati, Noor Novianti, Rina Lia Nurhidayah, Annisa Putra, Narundana Perdana Rahayuningsih Rahayuningsih, Rahayuningsih Rahman, Kamaulana Adi Saibun Sitorus Salsabila, Aidilia Putri Sapira, Putri Abelia Saputra, Herdian Sari, Nadia Fellinda Wanda Solly Aryza Teguh Wirawan, Teguh Wulandari, Siti Aprilia Zahra, Marinda Afifatu