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All Journal JURNAL KIMIA SAINS DAN APLIKASI Jurnal Bahan Alam Terbarukan PROSIDING SEMINAR KIMIA Jurnal Kimia Mulawarman ALCHEMY Jurnal Penelitian Kimia JURNAL ATOMIK Jurnal Bahan Alam Terbarukan
Noor Hindryawati, Noor
Jurusan Kimia, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Mulawarman
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Environmental Science Materials Science & Nanotechnology

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Journal : PROSIDING SEMINAR KIMIA

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MINI REVIEW: SINTESIS DAN KARAKTERISASI NANOPARTIKEL ZnO DAN APLIKASINYA SEBAGAI FOTOKATALIS Setiawan, M. Pratsojo; Hindryawati, Noor; Aziz, Abdul
PROSIDING SEMINAR KIMIA Vol 2 No 2 (2024): Prosiding SNKT III 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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This mini review will explore the multifunctional of ZnO nanomaterials. ZnO The multifunctional ZnO nanomaterial due to its inexpensive nature, eco-friendly, structure-dependent properties, and complete mineralization of pollutants make them more efficient semiconducting photocatalysts than other materials and good UV absorption. ZnO has many applications in everyday life such as for photocatalysts, antibacterials, edible coatings, and others. Based on the literature review, ZnO material can be synthesized using sol-gel, hydrothermal, solvothermal, precipitation and coprecipitation methods. So, this article reviews the recent developments in the degradation of Methylene Blue and Rhodamine B, which are cationic dyes, by examining operational parameters such as reaction time, initial dye concentration, and catalyst concentration. Keywords: Nanoparticles, Nano materials, Photocatalyst.
SYNTHESIS AND CHARACTERIZATION OF GRAPHENE OXIDE USING LIQUID PHASE EXFOLIATION (LPE) DAN HUMMER’S METHOD: MINI REVIEW Duratulhikmah, Nur Fadhilah; Hindryawati, Noor; Syaima, Husna
PROSIDING SEMINAR KIMIA Vol 2 No 1 (2023): Prosiding SNK 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Graphene oxide (GO) is a 2D material that has various oxygen functional groups on its surface and edges. The existence of these clusters makes GO have enormous potential to be applied in various fields. Currently various methods have been developed to synthesize these materials including Liquid Phase Exfoliation (LPE) and Hummer's. This review will present the synthesis of Graphene oxide along with the results of its characterization using Fourier Transform Infra Red (FTIR), Raman Spectroscopy, and UV-Vis spectrophotometer. Literature results show that in FTIR the typical functional groups that will appear are the O-H, C=O, and C-O epoxy groups, on Raman spectroscopy it shows peaks of 1300-1400 cm-1 (D-band) and peaks of 1500-1600 cm-1 (G -band) and there is a maximum absorption peak value at a wavelength of 200-235 nm from the results of UV-Vis characterization Keywords: Graphene Oxide, Hummer’s, Liquid Phase Exfoliation, Raman Spectroscopy
SYNTHESIS AND CHARACTERIZATION OF ZnO NANOPARTICLES: MINI REVIEW Wulandari, Siti Aprilia; Hindryawati, Noor; Ashari, Irfan
PROSIDING SEMINAR KIMIA Vol 2 No 1 (2023): Prosiding SNK 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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This mini review will explore the manufacture of ZnO nanomaterials. ZnO material has the advantages of high electron mobility, wide bandgap, high temperature resistance, and good UV absorption. ZnO has many applications in everyday life such as for photocatalysts, antibacterials, edible coatings, and others. Based on the literature review, ZnO material can be synthesized using sol-gel, hydrothermal, solvothermal, precipitation and coprecipitation methods. The resulting synthesis results are 7.4 nm-170 nm in size, have a hexagonal wurtzite crystal structure, have a bandgap of 3.23 eV-3.50 eV, and produce a surface area of 91.87 m2/g-113.37 m2/g. Based on the review conducted, it can be concluded that the method that produces ZnO nanoparticles with the smallest size and the largest surface area is synthesis using the solvothermal method. Keywords: Nano materials, Semiconductors, Nanoparticles.
SYNTHESIS OF SILVER NANOPARTICLES USING BIOREDUCTORS: MINI REVIEW Indriani, Isah Waliah; Hindryawati, Noor; Hiyahara, Irfan Ashari
PROSIDING SEMINAR KIMIA Vol 2 No 1 (2023): Prosiding SNK 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Synthesis of silver nanoparticles can be carried out using bioreductors which are natural reducing agents from natural materials containing antioxidant compounds or polyols which can reduce silver due to the nucleophilic nature of phenolic compounds in plant secondary metabolites. The use of bioreductors in the manufacture of nanoparticles can reduce the adverse effects and hazardous waste generated due to reduced adsorption of the toxic properties of the solvent used. The content of organic compounds in bioreductors can be utilized, for example secondary metabolites such as terpenoids, flavonoids and tannins which act as antioxidants and capping agents, where Ag+ ions in AgNO3 can be reduced into silver nanoparticles, so bioreductors can replace the role of synthetic reducing agents. Based on the literature used, several plants whose extracts can be used as bioreductors, namely gambier, gotu kola leaves, water hyacinth leaves, bilimbi leaves, cempedak bark and bay leaves using variations in the concentration and composition of the AgNO3 solution. The results of silver nanoparticles were synthesized using bioreductors, namely various nano-sized particles and based on UV-Vis spectrophotometry data, silver nanoparticles appeared at wavelengths between 410 - 450 nm. Keywords: Secondary metabolites, Bioreductors, Silver Nanoparticles
STUDI LITERATUR SINTESIS MATERIAL METAL-ORGANIC FRAMEWORKS-5 (MOF-5) MENGGUNAKAN METODE SOLVOTERMAL DAN APLIKASINYA Mid, Arsy Aprilia; Syaima, Husna; Hindryawati, Noor
PROSIDING SEMINAR KIMIA Vol 2 No 2 (2024): Prosiding SNKT III 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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This review article endeavours to comprehensively gather, compare, and scrutinize recent studies pertaining to the solvothermal synthesis of MOF-5 and its diverse applications. MOF-5 with the molecular formula Zn4O(BDC)3 which can be synthesized from a metal salt of zinc (Zn) with its organic ligands 1,4-benzene dicarboxylic acid (BDC) or terephthalic acid. In the last recent years, research on MOF-5 has continued to evolve and a variety of different synthesis methods have been tested. The synthesis process generally involves the use of polar organic solvents, such as N'N-diethylformamide (DEF) or N'N-dimethylformamide (DMF) at high temperatures and pressures. The solvothermal method is the most frequently used technique and allows good control over crystal size, morphology, and surface area. Factors such as solvent, temperature, reaction time, and metal/ligand ratio affect the properties of the resulting MOF-5 crystal. MOF- 5 is widely applied as a drug carrier material in drug delivery systems. MOF-5 has a high surface area that supports drug loading efficiency and significant hydrogen storage capacity. In addition, MOF-5's ability to release guest molecules in a controlled manner makes it an attractive choice for continuous applications. MOF-5 is also used in a variety of other applications including liquid and gas separation, catalysis, and adsorption. Research on modifying the structure of MOF-5 continues to evolve to meet the needs of increasingly diverse applications. Keywords : Synthesis, Terephtalic Acid, MOF-5, Solvothermal
SYNTHESIS OF SILVER NANOPARTICLES USING CHEMICAL REDUCTOR: MINI REVIEW Az Zahra, Upi Fathimah; Panggabean, Aman Sentosa; Hindryawati, Noor
PROSIDING SEMINAR KIMIA Vol 2 No 1 (2023): Prosiding SNK 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Silver nanoparticles are particles whose range ranges from 1-100 nm. Formation of metal nanoparticles can be done by top down (physics) and bottom up (chemistry) methods. Chemical reduction is a very commonly used method because it is relatively simple, easy and effective to produce AgNPs. Synthesis of silver nanoparticles was carried out by forming a colloidal silver solution using the silver nitrate reduction method with a chemical reducing agent. Some chemical reducing agents that can be used are ascorbic acid, citric acid, hydrazine and NaBH4. In addition, a stabilizing agent is needed to prevent agglomeration of the formed nanoparticles. The purpose of this article review is to determine the characteristics of silver nanoparticles synthesized using chemical reducing agents based on UV-Vis, PSA, TEM and SEM spectrophotometer data. The method used is the method of literature review. The results show that the synthesis of silver nanoparticles by reducing silver nitrate with sodium borohydride and poly acrylic acid (PAA) stabilizer produces an average size of 71.8 nm silver particles, the PVP stabilizer produces an average size of 96.0 nm silver particles, synthesis of silver nanoparticles using reducing agents ethylene glycol and polyvinylpyrrolidone (PVP) produces an average size of silver particles of less than 10 nm, synthesis of silver nanoparticles using reducing agents hydrazine hydrate and polyvinyl alcohol produces an average size of silver particles of 10-60 nm. Keywords: silver nanoparticle, NaBH4, stabilizer
DEPOLIMERISASI LIMBAH POLIETILEN TEREFTALAT (PET) MENJADI ASAM TEREFTALAT (SUMBER LINKER MOF-5) DENGAN METODE HIDROLISIS ASAM BASA Mid, Arsy Aprilia; Syaima, Husna; Hindryawati, Noor
PROSIDING SEMINAR KIMIA Vol 3 No 1 (2024): Prosiding SNK 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Terephthalic acid is an important ligand in the manufacture of MOF-5 which has been obtained from the depolymerization of PET (polyethylene terephthalate) recycled from PET plastic waste. Depolymerization of PET polymers into terephthalic acid ligands (linkers) is carried out using the acid-base hydrolysis method at room temperature using H2SO4 and NaOH. The yield was obtained at 40.95% (8.19 grams). PET monomers in the form of terephthalic acid were then tested by Thin Layer Chromatography (TLC) using n-hexane and ethyl acetate solvents (1:2). The TLC results showed the same stain spot between depolymerized terephthalic acid and commercial terephthalic acid. Depolymerized terephthalic acid and commercial terephthalic acid were then analyzed using Fourier Transform Infrared (FTIR) which showed the presence of functional groups C=O, C-O, C-H, and O-H and analyzed with a UV-Visible Spectrophotometer and obtained a maximum wavelength in both materials of 306 nm. Keywords: Terephthalic Acid, depolymerization, polyethylene terephthalate
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

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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
MINI REVIEW: SINTESIS NANOKOMPOSIT TiO2/Fe3O4 DAN PENGGUNAANNYA SEBAGAI FOTOKATALIS Putriani, Elsa Avrilia; Hindryawati, Noor
PROSIDING SEMINAR KIMIA Vol 3 No 2 (2025): Prosiding SNKT 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Mini Review on Synthesis and Characterization of TiO2/Fe3O4 Nanocomposites as Photocatalysts aims to compare the photocatalytic activity of TiO2/Fe3O4 nanocomposites in the process of dye degradation. TiO2/Fe3O4 nanocomposites are used because they have good photocatalytic activity properties in the process of dye photocatalysis. Based on existing literature, TiO2/Fe3O4 nanocomposites can be synthesized using several methods such as sol-gel, impregnation, precipitation and coprecipitation. Then applied to the degradation of dyes by considering time, type of light, dye concentration and catalyst. So, this article reviews the latest developments in TiO2/Fe3O4 nanocomposites, especially in photocatalysts of methylene blue and methyl orange dyes by looking at the concentration of TiO2/Fe3O4 used. Keywords : Photocatalysis, Fe3O4 Magnetite, Nanocomposites, TiO2.
A MINI REVIEW: SINTESIS DAN KARAKTERISASI NANOKOMPOSIT Fe3O4/ZnO SERTA APLIKASINYA Apriliana, Nina; Hindryawati, Noor
PROSIDING SEMINAR KIMIA Vol 3 No 2 (2025): Prosiding SNKT 2024
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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The Fe3O4/ZnO nanocomposites have an interesting combination due to their constituent composition. Fe3O4 is a ferromagnetic material that can react with magnetic fields, while ZnO is a semiconductor material that has a large band gap and strong photocatalytic properties. This article aims to analyze research on Fe₃O₄/ZnO nanocomposites and their applications. Based on several articles, Fe₃O₄/ZnO nanocomposites can be made using several methods including sonochemical, co-presipitasi, sol-gel, hydrothermal, ultrasonication, solid-state, layer-by-layer self assembly and poliol methods. Characterization can be done using XRD (X-Ray Diffraction), SEM (Scanning Electron Microscope) and TEM (Transmission Electron Microscope) instruments. The Fe3O4/ZnO nanocomposites can be used as photocatalysts for dyes, antibiotics and p-nitrophenol. The ability of Fe₃O₄/ZnO nanocomposites in photocatalysis can vary depending on several factors such as pH, contact time, concentration of Fe₃O₄/ZnO nanocomposites or degraded substances, etc. In addition, Fe₃O₄/ZnO nanocomposites can also act as antibacterial agents that have quite good activity on several bacteria, namely Eschericia coli. (-), Bacilis subtilis. (+) and Staphylococcus aureus. (+). Keywords : Application, Nanocomposite, Synthesis
Co-Authors -, Rahayuningsih Abdul Aziz Adhaina, Karina Aditya, Adrian Maulana Ahmad, Atika Aulia Akbar, Muhammad Marion Alimuddin Alimuddin Aman Sentosa Panggabean Apriliana, Nina Arief, M. Syaiful Ashari, Irfan Audi Zahid Iswaradi Az Zahra, Upi Fathimah Bergita, Angela Br Ginting, Survina Osalia Chairul Saleh Corebima, Damianus Develistur Daniel -, Daniel Daniel Daniel Duratulhikmah, Nur Fadhilah Elean, Samuel Erwin Erwin Eva Marliana, Eva Gaanty Pragas Maniam, Gaanty Pragas Hariati, Hariati Hariati, Hariati Helbianurramdan, Helbianurramdan Hiyahara, Irfan Ashari Husna Syaima Indriani, Isah Waliah Kusmiaty, Prilianda Laksono, Annuary Larasati, Zarra Udyani Laurentha, Nantha Mid, Arsy Aprilia Muhammad Marion Akbar N. S, R. R. Dirgarini Julia N., R.R. Dirgarini N., R.R. Dirgarini Julia Nanang Tri Widodo Octavianus, Riyan Octavianus, Riyan Oktaviani, Reka Palentin, Ersa Rizkita Pasuluran, Nirwanto Prastiwi, Mela puah, Siti Mar Putra, Narundana Perdana Putri, Rinda Anisyah Putriani, Elsa Avrilia Rahayuningsih Rahayuningsih, Rahayuningsih RAHMAT GUNAWAN Rahmat Gunawan Rakhmad, Rakhmad Ratna Kusuma Ronaldy, Igo Marsat Rudi Kartika, Rudi Saputra, Herdian Sari, Ermalia Lintang Sari, Helbyarti Mawar Setiawan, M. Pratsojo Soerja Koesnarpadi Subagyono, Dirgarini Julia Nurlianti Subagyono, R.R. Dirgarini Julia Nurlianti Subagyono, R.R. Dirgarini Julia Nurlianti Subagyono, RR Dirgarini Julia Nurlianti Subagyono, RR Dirgarini Julia Nurlianti Sukanadi, I Putu Sumarni Sumarni Syukri, Irma Syukri, Irma Tandirerung, Edman Tanjung, Faisal Teguh Wirawan Teguh Wirawan, Teguh Tika Widyastuti Wahyuni Ramadhani Wilsoma, Wilsoma Winanti, Renita Anggun Winni Astuti, Winni Wulandari, Duwi Devi Wulandari, Siti Aprilia Yuli Yana