Jurnal Sains Materi Indonesia最新文献

{"title":"ANALISIS STRUKTUR DAN POROSITAS KOMPSOSIT Fe3O4-KARBON AKTIF DARI LIMBAH KERTAS SEBAGAI ADSORBEN MAGNETIK","authors":"Adel Fisli, R. Safitri, Nurhasni Nurhasni, Deswita Deswita","doi":"10.17146/jsmi.2018.19.4.4886","DOIUrl":"https://doi.org/10.17146/jsmi.2018.19.4.4886","url":null,"abstract":"ANALISIS STRUKTUR DAN POROSITAS KOMPOSIT Fe 3 O 4 -KARBON AKTIF DARI LIMBAH KERTAS SEBAGAI ADSORBEN MAGNETIK . Komposit partikel magnet-karbon aktif dari limbah kertas telah berhasil dibuat. Karbon aktif dibuat dengan cara bahan kertas bekas dibakar dan selanjutnya direndam dalam asam kuat. Komposit Fe 3 O 4 -karbon aktif dibuat dengan mencampurkan garam besi Fe 3+ /Fe 2+ (rasio mol 2 : 1) dengan suspensi karbon aktif dalam air. Larutan campuran garam besi-karbon aktif ditambahkan larutan NaOH tetes demi tetes pada kondisi suhu 70 o C. Analisis struktur, morfologi, ikatan kimia, sifat magnet dan porositas diselidiki dengan berbagai alat, berturut-turut menggunakan alat XRD, SEM, FTIR, VSM dan adsorpsi-desorpsi N 2 Quantasorb. Hasil karakterisasi menunjukkan bahwa nanopartikel Fe 3 O 4 telah berhasil tercangkok pada struktur karbon melalui interaksi gugus hidroksil. Bahan komposit mempunyai sifat magnetik berkelakuan superparamagnetik. Keberadaan nanopartikel Fe 3 O 4 pada struktur karbon membentuk sistem mesopori baru, dimana volume pori meningkat dari 0,07 cc/g menjadi 0,464 cc/g (meningkat 6 kali untuk karbon tanpa aktivasi dan meningkat dari 0,1053 cc/g menjadi 0,525 cc/g (meningkat 5 kali) untuk karbon aktivasi dengan sebaran ukuran pori rata-rata 17,5 nm. Hasil uji adsorpsi menunjukkan bahwa senyawa fenol dan metil jingga hanya mampu diserap 30% dalam larutan air, tetapi untuk senyawa metilen biru mampu diserap 96,3% pada kondisi yang sama. Bahan komposit partikel magnet Fe 3 O 4 /karbon aktif limbah kertas dapat digunakan sebagai bahan alternatif menghilangkan zat warna metilena biru dalam limbah cair.","PeriodicalId":365391,"journal":{"name":"Jurnal Sains Materi Indonesia","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121098193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PENGARUH SUHU DAN WAKTU PEMANASAN TERHADAP KARAKTERISTIK LAPISAN ELEKTROLES Ni-P PADA BAJA TAHAN KARAT MARTENSITIK SS 420","authors":"Bahtiar Nurhakim, Arini Nikitasari, Efendi Mabruri","doi":"10.17146/JSMI.2017.18.4.4121","DOIUrl":"https://doi.org/10.17146/JSMI.2017.18.4.4121","url":null,"abstract":"ABSTRAK PENGARUH SUHU DAN WAKTU PEMANASAN TERHADAP KARAKTERISTIK LAPISAN ELEKTROLES Ni-P PADA BAJA TAHAN KARAT MARTENSITIK SS 420. Telah dilakukan pelapisan elektroles Nikel-Posfor (Ni-P) pada baja tahan karat martensitik SS 420 dengan berbagai variasi suhu dan waktu pemanasan. Karakteristik lapisan elektroles Ni-P yang terbentuk dianalisa untuk mengetahui pengaruh variasi suhu dan waktu pemanasan. Variasi suhu perlakuan panas yang digunakan yaitu 200oC, 300oC, 400oC, dan 500oC, sedangkan variasi waktu pemanasan yang digunakan antara lain 60 menit, 120 menit, dan 180 menit. Hasil yang diperoleh menunjukkan bahwa kenaikan suhu dan waktu pemanasan menyebabkan lapisan elektroles Ni-P yang terbentuk menjadi lebih seragam dan ketahanan material terhadap korosi juga semakin meningkat. Terjadi peningkatan kadar unsur Nikel dan Posfor dalam lapisan elektroles Ni-P dengan adanya perlakuan panas. Kadar unsur Nikel dan Posfor tertinggi pada suhu pemanasan 400oC dan waktu pemanasan selama 180 menit. Kata kunci: Elektroles,  Nikel-Posfor, Martensitik, Korosi ABSTRACT  EFFECT OF TEMPERATURE AND HEATING TIME ON THE COATING CHARACTERISTICS OF MARTENSITIC SS 420 ELECTROLESS Ni-P. Electroless nickel phosphorus (Ni-P) coating has been done in the martensitic stainless steel SS 420 with a variety of temperature and heating time. Electroless Ni-P coating characteristics formed was analyzed to determine the effect of variations in temperature and heating time. Variations in the temperature of the heat treatment used is 200oC, 300oC, 400oC and 500oC, while the variation of heating time is used, 60 minutes, 120 minutes and 180 minutes. The results obtained showed that the rise in temperature and heating time causes elektroles Ni-P coating formed becomes more uniform and material resistance to corrosion is also increasing. Increased levels of nickel and phosphorus elements in electroless coating of Ni-P with heat treatment. The highest nickel and phosphorus elements at 400oC heating temperature and 180 minute heating time. Keywords: Electroless, Nickel-Phosphor, Martensitic, Corrosion","PeriodicalId":365391,"journal":{"name":"Jurnal Sains Materi Indonesia","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126523832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"KARAKTERISASI SIFAT MAGNETIK DAN SERAPAN GELOMBANG MIKRO Ni(0,5-X)LaXFe2,5O4 HASIL SINTESIS DENGAN METODE KO-PRESIPITASI","authors":"Yunasfi Yunasfi, Nurdini Awaliyah, Hendrawati Hendrawati","doi":"10.17146/jsmi.2018.19.4.4962","DOIUrl":"https://doi.org/10.17146/jsmi.2018.19.4.4962","url":null,"abstract":"KARAKTERISASI SIFAT MAGNETIK DAN SERAPAN GELOMBANG MIKRO Ni (0,5-x) La x Fe 2,5 O 4 HASIL SINTESIS DENGAN METODE KO-PRESIPITASI . Telah dilakukan sintesis bahan penyerap gelombang mikro Ni (0,5-x) La x Fe 2,5 O 4 dengan metode ko-presipitasi. Serbuk Ni (0,5-x) La x Fe 2,5 O 4 (dengan x = 0; 0,2; dan 0,4) disintesis dengan mencampurkan serbuk NiCl 2 , LaCl 3 dan FeCl 3 sesuai dengan perbandingan molnya dengan larutan pengendap NH 4 OH 4 M. Serbuk Ni (0,5-x) La x Fe 2,5 O 4 yang terbentuk disinter pada suhu 1000 o C selama 5 jam. Hasil identifikasi fasa dengan X-Ray Diffractometer (XRD) menunjukan bahwa pada serbuk Ni0,5Fe2,5O4 (x = 0,0) terbentuk fasa NiFe 2 O 4 dan Fe 2 O 3 . Substitusi ion La 3+ menyebabkan munculnya fasa baru yang ditandai dengan munculnya fasa NiFe 2 O 4 , Fe 2 O 3 dan FeLaO 3 OH. Fasa NiFe 2 O 4 berkurang, sedangkan fasa Fe 2 O 3 dan FeLaO 3 OH semakin meningkat seiring dengan bertambahnya kandungan ion La 3+ . Karakterisasi sifat magnet serbuk Ni (0,5-x) La x Fe 2,5 O 4 dengan Vibrating Sample Magnetometer (VSM) menunjukkan perilaku feromagnetik, nilai Ms semakin rendah dari 31 emu/g hingga 21 emu/g sedangkan nilai Hc semakinmeningkat dari 123 Oe sampai 149Oe seiring dengan peningkatan kandungan ion La 3+  . Peningkatan kadungan ion La 3+ juga berhubungan dengan kemampuan penyerapan gelombang mikro. yang diukur dengan Vector Network Analyzer (VNA). Diketahui bahwa serapan gelombang mikro semakin meningkat seiring dengan peningkatan kandungan ion La3+, yaitu pada kisaran ~80 % sampai ~94 %.","PeriodicalId":365391,"journal":{"name":"Jurnal Sains Materi Indonesia","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124548270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SINTESIS DAN KARAKTERISASI Au-SiO2 MENGGUNAKAN SILICA GEL DENGAN VARIASI pH","authors":"Intan Paramudita, D. Risanti","doi":"10.17146/JSMI.2018.19.4.4967","DOIUrl":"https://doi.org/10.17146/JSMI.2018.19.4.4967","url":null,"abstract":"SINTESIS DAN KARAKTERISASI AuSiO 2 MENGGUNAKAN SILIKA GEL DENGAN VARIASI pH . Au dan SiO 2 banyak digunakan sebagaimaterial tambahan untuk fotoanoda TiO 2 karena dapat meningkatkan performansi DSSC. Au dapat meningkatkan pemanenan cahaya sedangkan silika bertindak sebagai material penghambur dan penghambat rekombinasi. Penelitian yang dilakukan adalah sintesis dan karakterisasi Au-SiO 2 menggunakan silika gel dengan variasi pH. Silika gel dipilih karena mudah didapat, banyak tersedia dan harga yang murah. Au disintesis berdasarkan metode Turkevich. Larutan silika gel didapatkan dengan cara menggerus silika gel hingga diameter 44 μm (325 mesh), kemudia ditambahkan ke dalam campuran etanol, ammonia dan aquadest. Karakterisasi XRD menunjukkan puncak yang mengindikasi adanya SiO 2 dan Au pada semua variasi pH. Ukuran nanopartikel emas yang disintesis pada pH 7 paling kecil dengan jumlah fraksi paling banyak. Sedangkan nanopartikel emas yang disintesis pada pH 2 berukuran paling besar dengan jumlah fraksi paling sedikit. Hal ini menunjukkan bahwa semakin rendah pH, maka semakin cepat proses pengintian dan pertumbuhan nanopartikel, dan sebaliknya. Celah energi Au-SiO 2 menggunakan silika gel dengan variasi pH sekitar 2,5 eV hingga 3,2 eV. Berdasarkan hasil pengukuran J-V, Au-silika gel yang disintesis pada pH 7 memiliki peningkatan efisiensi tertinggi.","PeriodicalId":365391,"journal":{"name":"Jurnal Sains Materi Indonesia","volume":"os-57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127720597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MORPHOLOGY AND TENSILE PROPERTIES OF PVA/SNAIL MUCIN NANOFIBER MEMBRANES","authors":"A. W. Nugroho, I. Sholeh, H. Sosiati","doi":"10.17146/jsmi.2018.19.4.4974","DOIUrl":"https://doi.org/10.17146/jsmi.2018.19.4.4974","url":null,"abstract":"MORPHOLOGY AND TENSILE PROPERTIES OF PVA/SNAIL MUCIN NANOFIBER  MEMBRANES . Snail mucin has been widely known to contain agents with wound healing properties. A preliminary research with regard to the potential to manufacture composite nanofibrous membranes of polyvinyl alcohol (PVA) and snailmucin (SM) by the electrospinning technique forwound dressing applications has been conducted. The effect of SM concentration on the morphology and tensile properties of PVA/SM nanomembrane has been investigated. The PVA/SMsolutions with various concentration of SM(0%, 2%, 4%, dan 6%)(w/v) were electrospun at the optimized process parameters. The morphology nanofiber membranes was observed by scanning electronmicroscopy and the average diameters of prepared nanofibers was determined by image analysis technique. The tensile test was conducted to examine the tensile properties of the nanofiber membranes being prepared according to ASTM D882. The PVA/SM nanofibre membrane possessing the tensile strength and tensile strain ranging between 3.48-5.37 MPa and 101.25- 157.13 %, respectively were successfully fabricated. Themembrane of 10%(w/v) PVA/ 2%(w/v) SMachieved the highest values of tensile strength. This phenomenon has been associated to the uniformity of fiber size diameter distribution within the membranes. It was expected that further optimization of the processing would allow development of the tensile properties compatibility requirement with this being the subject of future work by the authors.","PeriodicalId":365391,"journal":{"name":"Jurnal Sains Materi Indonesia","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121994103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THE IMPROVEMENT OF RAMIE FIBER PROPERTIES AS COMPOSITE MATERIALS USING ALKALIZATION TREATMENT: NaOH CONCENTRATION","authors":"U. Jamilah, S. Sujito","doi":"10.17146/jsmi.2021.22.3.6182","DOIUrl":"https://doi.org/10.17146/jsmi.2021.22.3.6182","url":null,"abstract":"THE IMPROVEMENT OF RAMIE FIBER PROPERTIES AS COMPOSITE MATERIALS USING ALKALIZATION TREATMENT: NaOH CONCENTRATION. Ramie fiber is a plant fiber that has good quality and potential as a constituent of composite materials. In this study, ramie fiber surface modification was conducted through alkalization with various at 0%, 4%, 5%, 6%, 7%, 8%, and 9% concentrations of NaOH using a magnetic stirrer with a speed of 200 rpm at 70οC for 5 hours. Alkaline ramie fibers are characterized using the Cheson method to determine the chemical composition of ramie fiber, FT-IR test to determine the function group of ramie fiber, morphological test to know the surface structure and diameter of ramie fiber, as well as tensile test to know the tensile strength and tensile modulus of PLA/ramie composite. Overall, the increase of NaOH concentration up to 8% percentage was able to increase the level of cellulose and lignin ramie fibers by 88.180 % and 2.444 %, as well as lower hemicellulose levels of 1.446 %. The alkalization treatment of 8% NaOH, optimally reduces the hydrophilic properties of the fiber. The increased concentration of NaOH makes the fiber surface cleaner and the diameter smaller, but the fiber structure is damaged at a concentration of NaOH more than 8%. Tensile test results showed that alkalized ramie fibers with an 8% concentration of NaOH produced PLA/ramie composites with the highest tensile strength and tensile modulus of 57.37 MPa and 248.25 MPa. Thus, the optimum ramie fiber properties are increased using alkalization with an 8% concentration of NaOH.","PeriodicalId":365391,"journal":{"name":"Jurnal Sains Materi Indonesia","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116951639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SYNTHESIS POLYMER MATRIX COMPOSITE EPOXY FeNdB-Cu FOR RADAR ABSORBER COATING APPLICATION","authors":"Sri Mulyati Latifah, D. Prajitno, M. Syukron","doi":"10.17146/jsmi.2021.22.3.6269","DOIUrl":"https://doi.org/10.17146/jsmi.2021.22.3.6269","url":null,"abstract":"SYNTHESIS POLYMER MATRIX COMPOSITE EPOXY FeNdB-Cu FOR RADAR ABSORBER COATING APPLICATION. Radar (Radio Detection and Ranging) is a technology using the principle of electromagnetic for detecting, measuring, and mapping target coordinates. So stealth technology was created to tackle these threats, one of which is the radar absorber coating method (RAC). This research aims to identify the effect addition of Cu to Fe-Nd-B radar absorber material as polymer matrix composite (PMC). The processes were done by powder metallurgy method, started by milling and mechanical alloying process using planetary ball mill for 60 minutes 1000 rpm, 25 kg/mm2 of compaction load, and sintering at the temperature 1000 oC for 3 hours. The coating process was carried out conventional method as much as 1 layer, the variation of resin and magnetic powder are (95:5), (90:10), and (85:5) with the addition of Cu 1%wt. Based on the characterization the lowest RL was obtained at the composition (85:15) with the value 32.08 dB at the frequency of 10.36 GHz, magnetic characterization after doping addition coercivity 0.096 kOe and Saturation 5.22 kG. PMC hardness was raising following to addition of magnetic powder with the 29.2 HD Shore D, and adhesivity value was decreased following to addition of magnetic powder to 0.5 MPa.","PeriodicalId":365391,"journal":{"name":"Jurnal Sains Materi Indonesia","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123506258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A SYNERGISTIC ABSORPTION AND PLASMONIC EFFECT OF SiO2@Au@TiO2 IN TiO2 PHOTOANODE FOR DYE-SENSITIZED SOLAR CELLS","authors":"Matius Nata Pakpahan, Aldi Hartanto, Yonatan Davidson Gultom, N. Fadhilah, D. Risanti","doi":"10.17146/jsmi.2021.22.3.6175","DOIUrl":"https://doi.org/10.17146/jsmi.2021.22.3.6175","url":null,"abstract":"A SYNERGISTIC ABSORPTION AND PLASMONIC EFFECT OF SiO2@Au@TiO2 IN A TiO2 PHOTOANODE FOR DYE-SENSITIZED SOLAR CELLS. A method for increasing the visible-light harvesting of a TiO2 anatase photoanode in dye-sensitized solar cells by incorporating plasmonic nanostructures was developed. Sidoarjo mud as the SiO2 source was used to successfully synthesized core/multishell SiO2@Au@TiO2, with varying amounts of Au (60, 90, and 120 mL). In addition, the core/multishell fractions in TiO2 paste were varied, i.e., 0.5%, 1%, and 5%. The UV–Vis spectrum shows that a more ripple spectrum at higher wavelengths is obtained with increasing Au content, as suggested by the presence of large Au nanoparticles; however, a similar value of efficiency is observed for all sample variations studied compared to a pure TiO2 photoanode. The incident photon-to-current efficiency reveals that all photoanodes containing the core/multishell SiO2@Au@TiO2 studied show somewhat broader and enhanced spectra for all studied wavelengths compared to the pure TiO2 photoanode, resulting from the synergistic effect between plasmonic nanostructures and the presence of silica that boost the absorption to higher wavelengths.","PeriodicalId":365391,"journal":{"name":"Jurnal Sains Materi Indonesia","volume":"157 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133157611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SODIUM LAURETH SULFATE (SLS) DECORATED α-PbO NANOCRYSTALS: OPTICAL, STRUCTURE, AND MORPHOLOGY, PROPERTIES","authors":"Tika E. Putri, I. Saputra, A. H. Saputro, Yogi Nopiandi Permana, Y. Yulizar, S. Sudirman","doi":"10.17146/jsmi.2021.22.3.6209","DOIUrl":"https://doi.org/10.17146/jsmi.2021.22.3.6209","url":null,"abstract":"SODIUM LAURETH SULFATE (SLS) DECORATED α-PbO NANOCRYSTALS: OPTICAL, STRUCTURE, AND MORPHOLOGY PROPERTIES. The α-PbO nanocrystals were successfully decorated using sodium laureth sulfate (SLS) anionic surfactant. The method used is one-pot synthesis approach. The precursor used is lead nitrate (Pb(NO3)2). The UV-Vis spectrophotometer showed the absorption peak of α-PbO nanocrystals was seen at wavelength of 237 nm and an absorbance value of 0.7. The optical properties of PbO nanocrystals can be seen at the bandgap value of 4.2 eV. FT-IR spectroscopy showed the shift of absorption peak at the wavenumber of 1358 cm-1. XRD spectroscopy showed the crystals of PbO at diffraction angles (2θ) of 10-80o: 29.17, 32.54, 37.85, 39.62, 45.16, 46.21, 56.12, and 61.73 with miller indices of (111), (200), (201), (121), (220), (030), (311), and (032), respectively. The crystal size average of PbO was 56.32 nm. The results of PSA and PZC shows the particle size distribution of PbO is 71.5 nm with inter-particle charge of -25 mV. SEM-EDX data shows the PbO nanocrystals have an irregularly spherical with a compounds composition of Pb (83.12%) and O (16.88%). From the data of characterization, it can be concluded the PbO nanocrystals was successfully decorated using the surfactant anionic of sodium laureth sulfate.","PeriodicalId":365391,"journal":{"name":"Jurnal Sains Materi Indonesia","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123046081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CHARACTERIZATION OF GOLD NANOPARTICLES FROM CLOVE FLOWER WATER EXTRACT AND ITS ANTIOXIDANT ACTIVITY","authors":"G. A. D. Lestari, Kadek Duwi Cahyadi, I. Suprihatin","doi":"10.17146/jsmi.2021.22.3.6292","DOIUrl":"https://doi.org/10.17146/jsmi.2021.22.3.6292","url":null,"abstract":"CHARACTERIZATION OF GOLD NANOPARTICLES FROM CLOVE FLOWER WATER EXTRACT AND ITS ANTIOXIDANT ACTIVITY. Green chemistry is a safe and cost effective method for producing metal nanoparticles, characterize and tested the antioxidant activity of gold nanoparticles (AuNPs). In this research gold nanoparticles were synthesized using HAuCl₄ as the gold precursor and water extract of Syzygium aromaticum (L.) flowers 0.5% as the bioreductor. Characterization of the gold nanoparticles was carried out using UV-Vis spectrophotometer to measure the maximum wavelength, zeta analyzer to determine the particle size, and SEM EDS to investigate the morphology and content of the gold nanoparticles. The antioxidant activity was determined by measuring its free radical scavenging activity using the DPPH method. The research found the AuNPs has a maximum wavelength at 533 nm, and particle size of 73.52 nm. Furthermore, the AuNPs show free radical scavenging activities of up to 70%.","PeriodicalId":365391,"journal":{"name":"Jurnal Sains Materi Indonesia","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130015842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}