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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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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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Abstract

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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Abstract

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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Abstract

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
Green Synthesis Of Silver Nanoparticles Using Ketapang Leaf Extract (Terminalia Catappa L.) Assisted By Ultrasound Syaima, Husna; Hindryawati, Noor; Hiyahara, Irfan Ashari; Wirawan, Teguh; Arief, M. Syaiful; Widodo, Nanang Tri; Ahmad, Atika Aulia; Maniam, Gaanty Pragas
Jurnal Bahan Alam Terbarukan Vol 12, No 2 (2023): December 2023 [Nationally Accredited Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v12i2.48809

Abstract

Green synthesis of silver nanoparticles using plants has been interesting in recent years. In the present study, the silver nanoparticles were synthesized using a bioreductor from ketapang leaf extract (Terminalia catappa L.) assisted by sonochemical methods. This green synthesis provides an economic, eco-friendly, and clean synthesis route for silver nanoparticles. Different concentrations of AgNO3 precursors (0.5; 1.0 and 1.5 mM) were initially reacted with ketapang leaf extract with PVA 1% solution as stabilizers that were sonicated for 30 minutes. Silver nanoparticle colloidal solutions were characterized using UV-Vis spectrophotometers, Particle Size Analyzers (PSA), and Transmission Electron Microscopes (TEM). Maximum absorption of silver nanoparticles was obtained at wavelength 420-450 nm. Based on UV data, the silver nanoparticles showed stability for up to 3 weeks. The XRD peaks indicated that the (111) crystallographic plane was more predominant than other planes. The average size of the silver nanoparticles was 79.7 nm from the PSA result. TEM imaging depicted that the nanoparticles were spherical. Finally, the result proved that the silver nanoparticles effectively removed the methylene blue up to 76.43% within optimum conditions (3 ppm of methylene blue, 15 minutes contact time, and 8% nanoparticle concentration).
Mini Review: Citrus sinensis Sebagai Bioreduktor Dalam Green Synthesis Nanopartikel Hiyahara, Irfan Ashari; Hindryawati, Noor; Syaima, Husna; Akbar, Muhammad Marion; Duratulhikmah, Nur Fadhilah; Putra, Narundana Perdana; Wulandari, Siti Aprilia; Larasati, Zarra Udyani; Rahayuningsih, Rahayuningsih; Indriani, Isah Waliah
JURNAL ATOMIK Vol 8 No 1 (2023)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Green synthesis is an eco-friendly approach that provides a viable alternative to traditional physical and chemical methods for the production of nanoparticles. This technique employs non-toxic and safe materials, such as plants, microorganisms, algae, bacteria, yeast, and fungi, to generate stable and less toxic nanoparticles. Citrus sinensis, commonly known as sweet orange, is a plant that contains various active compounds. These bioactive compounds can be extracted and used as bioreductants in green synthesis of nanoparticles. This mini review aimed to provide an overview of the current state of research on the utilization of Citrus sinensis as a bioreductant in the production of nanoparticles. A systematic search strategy was employed to identify research articles that met the criteria of discussing green synthesis of nanoparticles with Citrus sinensis as a bioreductant. The nanoparticles produced using Citrus sinensis extract can be either metal nanoparticles or metal oxide nanoparticles. The review highlights the distribution of nanoparticles produced with Citrus sinensis extract, their applications, and the extraction process of Citrus sinensis commonly employed in green synthesis of nanoparticles. Hopefully this review serves as a useful reference for researchers and practitioners who are interested in employing the Citrus sinensis plant as a bioreductant in the green synthesis of nanoparticles.
CORRELATION OF Pb METAL ION LEVELS ON PROTEIN CONCENTRATION IN CRUSH CONSTRUCTION (Gafrarium tumidium) TAKEN IN THE COAST OF BONTANG, EAST KALIMANTAN Corebima, Damianus Develistur; Kartika, Rudi; Hindryawati, Noor
JURNAL ATOMIK Vol 5 No 2 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Research on the correlation of Pb metal ion levels to protein content in crush clams (Gafrarium tumidium) taken at the coast of the East Kalimantan Rhino Estuary has been conducted. This study aims to determine the levels of Pb metal ions and protein levels in blood clams based on the size and location of different samples. Correlation of Pb metal ion levels and protein in blood clams was tested using the Least Square method and Pearson product moment. Analysis of Pb metal ion levels using SSA (Atomic Absorption Spectrophotometer) and protein content analysis using the Kjeldahl method. In this study, the Pb metal ion level was obtained at the public port of Tanjung Limau, PPI Tanjung Limau and beach Lallo Sekangat with an average of 0.7474 mg/L, 0.5513 mg/L, and 0.2804 mg/L respectively. Crush clam protein content at Tanjung Limau, PPI Tanjung Limau and beach Lallo Sekangat with an average of 19.6544%, 14.6902%, and 10.9135% respectively. The correlation of Pb metal levels to protein levels in crush clams (Gafrarium tumidium) was stated positively with coefficient correlation results was strong (r = 0.7910).
Daya Antibakteri Ekstrak Metanol Buah Okra (Abelmoschus esculentus (L.) Moench) puah, Siti Mar; Astuti, Winni; Hindryawati, Noor
JURNAL ATOMIK Vol 6 No 2 (2021)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

ABSTRACT Phytochemical test and antibacterial activity of methanol extract of Okra (Abelmoschus esculentus (L.) Moench) fruit have been carried out. Extraction using maceration method. The methanol extract of Okra fruit contains phenolic secondary metabolites, alkaloids and steroids. Antibacterial activity opposes the agar diffusion method against the bacteria Salmonella typhi and Steprococcus mutans. The Minimum Inhibitory Concentration Value of Okra fruit methanol extract against Salmonella typhi bacteria at a concentration of 0.625-1.25% and against Streptococcus mutans bacteria 1.25% -2.5%. Okra fruit methanol extract has antibacterial activity with wide variations. Keywords : Abelmoschus esculentus (L.) Moench, antibacterial activity, secondary metabolites, Minimum Inhibitory Concentration (MIC).
SINTESIS DAN KARAKTERISASI NANOPARTIKEL PERAK TERMODIFIKASI KITOSAN MENGGUNAKAN REDUKTOR NaBH4 Az Zahra, Upi Fathimah; Hindryawati, Noor; Panggabean, Aman Sentosa
JURNAL ATOMIK Vol 9 No 2 (2024)
Publisher : Jurusan Kimia FMIPA UNMUL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ja.v9i2.1406

Abstract

The research about synthesis of chitosan-modified silver nanoparticles using NaBH4 reducing agents has been carried out. This research aims to determine the optimum AgNO3 concentration, optimum pH and optimum stirring time. The chitosan-modified silver nanoparticles obtained were then characterized using a UV Vis Spectrophotometer, Particle Size Analyzer and Transmission Electron Microscopy instruments. The results of measurements using a UV-Vis Spectrophotometer, the synthesis of chitosan-modified silver nanoparticles was obtained was obtained at the optimum condition of AgNO3 concentration of 3x10-3 M, pH 4 and the optimum stirring time was 2 hours. The formation of AgNPs is characterized by the presence of typical absorption peaks at maximum wavelengths of 402 nm-434 nm. Keywords: Silver Nanoparticles, Chitosan, NaBH4
Co-Authors -, Rahayuningsih Abdul Aziz Adhaina, Karina 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 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