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Surface Modification of Hematite using Stearic Acid as Hydrophobic Inorganic Pigment Materials Iqbal, Rendy Muhamad; Agnestisia, Retno; Damsyik, Akhmad; Sinaga, Tiara Cristy Agatha; Khaerudini, Deni Shidqi; Wulandari, Ika Octavia; Susanti, Indri; Putra, Riandy; F. Adany
Jurnal Sains Materi Indonesia Vol. 26 No. 2 (2025): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2025.8982

The inorganic pigment is a material that determines the color of a paint that can be used as a coating material. Until now, the basic material for red pigment, namely hematite, has been imported to meet domestic needs. This study aims to develop a hematite-based inorganic pigment material from the mill-scale waste of PT Krakatau Steel by modifying the surface to be hydrophobic, making the pigmenting material resistant to acid attack and preventing peeling and corrosion of the material. The surface modification of hematite is carried out by reacting it with stearic acid into ethanol as a solvent. Hematite was immersed in a stearic acid solution with various concentrations of 2, 4, 6, and 8% for 6 hours; it was then separated by filtration and followed by the drying process. The hematite-stearic was characterized by X-ray diffraction (XRD), Fourier-transform infrared (FTIR), scanning electron microscope (SEM), and water contact angle (WCA). The results show that the grafting process successfully changed the properties of hematite to hydrophobic. It is also supported by the FTIR spectrum due to the presence of molecular vibration of C-H, C=O, C-O, and Fe-O. Then, the higher contact angle is 150.474° for the stearic acid concentration of 6%.

Sintesis dan Karakterisasi XRD dari Nanosilika Menggunakan Metode Sol-gel Pramudita, Dimas; Nababan, Jesika; Isaura, Anasthasya; Ratnalisti, Putri; Simbolon, Wenika; Sylvani, Miranti Maya; Beladona, Siti Unvaresi Misonia; Putra, Riandy
Jurnal Penelitian UPR Vol. 5 No. 1 (2025): Jurnal Penelitian UPR: Kaharati
Publisher : LPPM Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52850/jptupr.v5i1.18458

Mineral di Indonesia memiliki potensi besar untuk dikembang dalam sektor pertambangan dan industri salah satunya adalah silika. Silika oksida (SiO2) merupakan mineral berbentuk padatan yang banyak dianalisis dalam pengembangan penelitian sintesis nanomaterial. Pada penelitian ini sintesis nanomaterial silika dilakukan menggunakan metode sol-gel untuk memperoleh kristal murni yang sesuai standar. Tujuan dilakukan penelitian ini adalah menganalisis karakterisasi dan kemurnian hasil kristalisasi silika (SiO2) dengan metode sol-gel menggunakan XRD. Penelitian sintesis silika menggunakan metode sol-gel dilakukan di UPT Laboratorium Terpadu, Universitas Palangka Raya, Kalimantan Tengah. Hasil penelitian menunjukkan bahwa sintesis nanosilika dengan metode sol-gel terjadi dalam 2 tahapan reaksi, yaitu reaksi hidrolisis dan reaksi kondensasi, dimana diperoleh hasil puncak 2θ = 26,7° dengan nilai intensitas yang tinggi, nilai kristalinitas 64,4%, dan ukuran rata-rata kristal sebesar 1,2544 nm.

A Review: Structure and Synthesis of Perovskite as Lithium-Ion Battery (LIB) Material Miranti Maya Sylvani; Ferry Purwanto; Jumiati; Elfrida Roulina Simanjuntak; Sari Namarito Simarmata; Rendy Muhamad Iqbal; Riandy Putra; Rokiy Alfanaar; Siti Unvaresi Misonia Beladona
Bohr: Jurnal Cendekia Kimia Vol 2 No 01 (2023): Bohr: Jurnal Cendekia Kimia Vol 02 No 01
Publisher : Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Palangka Raya

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Lithium-ion battery (Li-ion battery or LIB) has gained significant attention as a highly promising power source. It offers excellent energy and power density profiles, along with other desirable properties such as no memory effect and long-lasting power capabilities. This has made Li-ion battery technology highly sought after in the energy industry and electronic devices. Perovskite materials have emerged as one of the non-precious metal-based materials that have attracted considerable interest in recent decades. Perovskites are highly regarded due to their remarkable properties and their potential applications in electrochemical energy devices. They possess excellent physical and chemical characteristics that make them suitable for use as electrode materials in rechargeable lithium-ion batteries.

Building A Strong Culture with Safety and Security Management Education in The Science Laboratory of SMAN 4 Palangka Raya: Membangun Budaya yang Kuat dengan Pendidikan Manajemen Keselamatan dan Keamanan di Laboratorium Sains SMAN 4 Palangka Raya Riandy Putra; Marvin Horale Pasaribu; Junita Dongoran; Rizki Rachmad Saputra
NAWASENA : JOURNAL OF COMMUNITY SERVICE Vol. 1 No. 01 (2023): Vol 01 No 01 2023
Publisher : NAWASENA : JOURNAL OF COMMUNITY SERVICE

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Abstrak Laboratorium adalah tempat untuk melakukan percobaan maupun pelatihan. Budaya keselamatan dan keamanan harus dipromosikan di laboratorium, di mana eksperimen dan pelatihan dilakukan, untuk menjadikan ruang tersebut sebagai tempat yang aman untuk pembelajaran, penelitian, dan pekerjaan. Baik pengelola maupun pengguna sama-sama bertanggung jawab atas administrasi keselamatan dan keamanan laboratorium sains, sehingga setiap orang yang terlibat harus menyadari hal ini dan merasa berkewajiban untuk mengatur, memelihara, dan bekerja demi keselamatan tempat kerja. Beberapa pengguna fasilitas laboratorium yang perlu memahami manajemen keselamatan dan keamanan laboratorium antara lain guru SMA dan personel siswa. Masih banyak sekolah yang belum memberikan perhatian penuh pada mata pelajaran keselamatan dan keamanan kerja. Selain itu, keselamatan dan keamanan kerja di sekolah masih belum diterapkan sesuai dengan standar keselamatan dan keamanan kerja yang relevan. Berdasarkan hal tersebut, SMAN 4 Palangka Raya akan menjadi tuan rumah aksi pengabdian masyarakat ini. Bimbingan keselamatan dan keamanan kerja di SMAN 4 Palangka Raya bertujuan untuk melindungi kesehatan dan keselamatan siswa saat mengikuti pelajaran yang melibatkan bahan kimia dan peralatan listrik yang menimbulkan risiko serius bagi keselamatan mereka. Abstract Laboratories are places to conduct experiments and training. A culture of safety and security should bepromoted in laboratories, where experiments and training are conducted, to make the space a safe place forlearning, research and work. Both managers and users are equally responsible for the administration of sciencelaboratory safety and security, so everyone involved should be aware of this and feel obligated to organize,maintain and work towards workplace safety. Some users of laboratory facilities who need to understandlaboratory safety and security management include high school teachers and student personnel. There are stillmany schools that have not given full attention to occupational safety and security subjects. In addition,occupational safety and security in schools is still not implemented in accordance with relevant occupationalsafety and security standards. Based on this, SMAN 4 Palangka Raya will host this community service action.Occupational safety and security guidance at SMAN 4 Palangka Raya aims to protect students' health and safetywhile taking part in lessons involving chemicals and electrical equipment that pose serious risks to their safety.

AMMONIUM-MODIFIED NATURAL ZEOLITE: A PROMISING CATALYST FOR RENEWABLE DIESEL PRODUCTION – A REVIEW Putra, Riandy; Rosmainar, Lilis; Rasidah
Walisongo Journal of Chemistry Vol. 8 No. 1 (2025): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v8i1.26031

The global shift toward sustainable energy has intensified research into renewable diesel production, owing to its superior fuel properties and environmental benefits. Catalysts play a crucial role in the hydrodeoxygenation of vegetable oils and biomass-derived feedstocks to produce green diesel. Natural zeolites, valued for their high thermal stability and tunable acidity, have emerged as cost-effective catalytic alternatives. This review explored recent advancements in the application of ammonium-modified natural zeolites as catalysts in green diesel production. Characterization techniques, including FT-IR (Fourier Transform Infrared Spectroscopy), XRD (X-ray Diffraction), SEM (Scanning Electron Microscopy), TG-DTG (Thermogravimetric Analysis), nitrogen adsorption isotherms, and NH₃-TPD (Temperature-Programmed Desorption of Ammonia), were employed to analyze NH₄⁺-zeolites. Results demonstrate that ammonium modification enhanced the acidity, porosity, and catalytic efficiency of natural zeolites, leading to improved deoxygenation selectivity and increased green diesel yields. The NH₄⁺-modified zeolite achieved a C₁₅ hydrocarbon selectivity of 70%, compared to 54% for the unmodified variant. Furthermore, introducing ammonium ions helped regulate acidity by mitigating excessive Brønsted acidity, ultimately reducing coke formation and improving catalyst stability. This review discusses the physicochemical properties and catalytic performance of ammonium-modified natural zeolites in green diesel production. It also addresses the challenges and future directions for scaling up their application in renewable fuel technologies

AMMONIUM-MODIFIED NATURAL ZEOLITE: A PROMISING CATALYST FOR RENEWABLE DIESEL PRODUCTION – A REVIEW Putra, Riandy; Rosmainar, Lilis; Rasidah
Walisongo Journal of Chemistry Vol. 8 No. 1 (2025): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v8i1.26031

The global shift toward sustainable energy has intensified research into renewable diesel production, owing to its superior fuel properties and environmental benefits. Catalysts play a crucial role in the hydrodeoxygenation of vegetable oils and biomass-derived feedstocks to produce green diesel. Natural zeolites, valued for their high thermal stability and tunable acidity, have emerged as cost-effective catalytic alternatives. This review explored recent advancements in the application of ammonium-modified natural zeolites as catalysts in green diesel production. Characterization techniques, including FT-IR (Fourier Transform Infrared Spectroscopy), XRD (X-ray Diffraction), SEM (Scanning Electron Microscopy), TG-DTG (Thermogravimetric Analysis), nitrogen adsorption isotherms, and NH₃-TPD (Temperature-Programmed Desorption of Ammonia), were employed to analyze NH₄⁺-zeolites. Results demonstrate that ammonium modification enhanced the acidity, porosity, and catalytic efficiency of natural zeolites, leading to improved deoxygenation selectivity and increased green diesel yields. The NH₄⁺-modified zeolite achieved a C₁₅ hydrocarbon selectivity of 70%, compared to 54% for the unmodified variant. Furthermore, introducing ammonium ions helped regulate acidity by mitigating excessive Brønsted acidity, ultimately reducing coke formation and improving catalyst stability. This review discusses the physicochemical properties and catalytic performance of ammonium-modified natural zeolites in green diesel production. It also addresses the challenges and future directions for scaling up their application in renewable fuel technologies

Sintesis dan Karakterisasi Senyawa Kompleks Zn(II) dengan Ligan-Ligan Organik: Review Pramudita, Dimas; Sugiyani, Tina; Putra, Riandy
Bohr: Jurnal Cendekia Kimia Vol 3 No 01 (2024): Bohr: Jurnal Cendekia Kimia Vol 03 No 01
Publisher : Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Palangka Raya

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Senyawa kompleks merupakan senyawa yang terbentuk karena adanya ikatan antara ion logam sebagai atom pusat dan ligan organik sebagai atom donor PEB. Penelitian ini bertujuan untuk menganalisa topik penelitian dibidang senyawa kompleks logam Zn(II) dengan menggunakan metode literature review. Sintesis senyawa kompleks menggunakan logam Zn(II) dengan berbagai ligan-ligan organik seperti katekin, 8-Hidroksikuinolin, Schiff base, BNBP, dan EDTA akan menghasilkan warna yang unik. Kristal yang terbentuk dengan ligan 8-Hidroksikuinolin akan menghasilkan endapan berwarna kuning terang, ligan Schiff base menghasilkan kristal yang berwarna cokelat, ligan BNBP diperoleh padatan berwarna kuning kehijauan, dan ligan EDTA menghasilkan kristal berwarna putih keruh. Karakterisasi terbentuknya senyawa kompleks dapat dibuktikan melalui pergeseran serapan gugus fungsional dalam spektrum FTIR yang menandakan adanya ikatan antara ion logam Zn(II) dengan ligan.

Review: Pemanfaatan Membran Zeolit dan Metal-Organic Frameworks (MOFs) dalam Pemisahan Karbon Dioksida: A Review: Utilization of Zeolite and Metal-Organic Frameworks (MOFs) Membrane in the Separation of Carbon Dioxide Miranda Silaban, Eka; Septia Sametri, Ni Wayan; Putra, Riandy
Bohr: Jurnal Cendekia Kimia Vol 3 No 01 (2024): Bohr: Jurnal Cendekia Kimia Vol 03 No 01
Publisher : Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Palangka Raya

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Teknologi membran yang menggunakan zeolit dan MOFs telah terbukti memiliki selektivitas yang tinggi dalam pemisahan CO2 dari campuran gas. Dalam review artikel ini, kami melakukan tinjauan literatur tentang penggunaan kedua teknologi tersebut dalam pemisahan gas CO2. Kami menyoroti penelitian terbaru yang menunjukkan kemampuan zeolit dalam meningkatkan selektivitas membran terhadap CO2 dan integrasi MOFs dalam membran untuk meningkatkan kinerja pemisahan gas. Metodologi penelitian pada tinjauan literatur ini menggunakan data sekunder dari penelitian-penelitian terdahulu. Hasil tinjauan ini menunjukkan bahwa kedua teknologi tersebut memiliki potensi besar dalam pemisahan gas CO2 dan menjadi solusi yang efektif untuk tantangan lingkungan yang terkait dengan gas CO2. Tinjauan ini memberikan wawasan yang komprehensif tentang potensi zeolit dan MOFs dalam pemisahan gas CO2, serta pentingnya pengembangan lebih lanjut dalam bidang ini untuk mengatasi perubahan iklim.

Peningkatan Produktivitas Hasil Pertanian Melalui Pelatihan Pembuatan Pupuk Organik Cair dari Tanaman Purun Kalalinggi, Septaria Yolan; Kumalasari, Meiyanti Ratna; Beladona, Siti Unvaresi Misonia; Putra, Riandy; Pratika, Remi Ayu
Journal of Appropriate Technology for Community Services Vol. 6 No. 1 (2025)
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/jattec.vol6.iss1.art9

The influence of the utilization of chemical fertilizers on agricultural land has a negative impact on the environment since it can reduce soil fertility and pollute air and water. Currently, the use of chemical fertilizers is starting to be reduced. The development of organic fertilizers derived from natural ingredients began to be developed, where the advantages of using organic fertilizers are easy to obtain, environmentally friendly, and low production costs. The Community Empowerment Assistance Lecturer Program was carried out in Tuwung Village, Pulang Pisau Regency, Central Kalimantan. This program is carried out in order to empower farmers as an effort to increase the productivity of their agricultural products. The aims of this program are; 1). Provide training to farmers related to how to make liquid organic fertilizer from purun plants; and 2). Determine the effectiveness of the implementation of training on increasing farmers' knowledge in making liquid organic fertilizer. Training activities were presented to the introduction of purun plants and their potential as materials for making liquid organic fertilizer. Next, the activity continued with a demonstration of how to make liquid organic fertilizer from purun plants. Finally, the farmers were asked to practice directly making liquid organic fertilizer. The results of this training had an positive response on the knowledge and skills of farmers in Tuwung Village, Pulang Pisau Regency, in making liquid organic fertilizer. In addition, this activity is considered effective and efficient based on the results of the evaluation in accordance with the target achievement.

A Review on Development of Porous Aluminosilicate-Based Zeolite Adsorbent for Heavy Metal Pollution Treatment Hakim, Muh. Supwatul; Iqbal, Rendy Muhamad; 'Adany, Fildzah; Putra, Riandy; Nitriany, Ici; Telaumbanua, Idam Sulastri; Sitorus, Raya Uli; Dewi, Rey Kamala
Jurnal Sains Materi Indonesia Vol. 25 No. 2 (2024): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2024.1076

Heavy metal contamination endangers human health and has been identified as a global issue. The rising concentration of heavy metals in industrial and domestic wastewater has prompted the quest for effective technologies and treatments to remove them. Zeolite is a promising material for eliminating heavy metals from diverse sources that pollute wastewater. Zeolite is a crystal comprised of hydrated aluminosilicates of alkali and alkaline earth metals in a threedimensional crystal network composed of easily controllable SiO4 4− and AlO4 5− . This review focuses on the critical analysis of the application of several zeolites for the adsorption of heavy metals from wastewater, namely Cd(II), As(III and V), Cr(III and VI), Cu(II), Pb(II), Ni(II), Mn(II), and Hg(II). The results of heavy metal removal reported by zeolites are summarized, and the chemical modification of zeolites with acid/base/salt reagents, surfactants, and metal reagents has been investigated, compared, and discussed. The adsorption/desorption capabilities, systems, operational parameters, isotherms, and kinetics of zeolites are then explained and compared.

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