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Sintesis Grafena Oksida (GO) dan GO/ZnO sebagai Fotokatalis untuk Mendekolorisasi Larutan Metilena Biru Eka Febrianti; Sandi Muhamad Arifin; Arief Iyustiana; Eko Prabowo Hadisantoso; Soni Setiadji
Gunung Djati Conference Series Vol. 44 (2024): Seminar Nasional (SEMNAS) Kimia Tahun 2024
Publisher : UIN Sunan Gunung Djati Bandung

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Abstract

Grafena oksida (GO) dapat diaplikasikan sebagai bahan fotokatalis karena kemampuannya dalam mendekolorisasi beberapa jenis zat pewarna organik seperti metilena biru. Pada penelitian ini, GO disintesis dari grafit menggunakan prosedur modifikasi Hummer’s. Sampel GO yang dihasilkan kemudian dikompositkan dengan larutan Zn(NO3)2.6H2O 0,1 M melalui metode kopresipitasi dengan menambahkan larutan NH4OH untuk mengendapkan sampel komposit GO/ZnO. pH endapan GO/ZnO dinetralkan kemudian dikeringkan pada suhu 70ºC selama 8 jam. Sampel GO dan GO/ZnO dikarakterisasi menggunakan X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM) dan Fourier Transform - Infra Red Spectroscopy (FT-IR). Hasil XRD menunjukan bahwa sampel GO dan kompositnya telah terbentuk. Namun GO yang dihasilkan masih belum murni. GO dan GO/ZnO lalu diaplikasikan sebagai fotokatalis dalam mendekolorisasi larutan metilena biru (MB) dengan penyinaran cahaya tampak dan sinar matahari. Kondisi optimum fotokatalitik sampel GO, GO/ZnO dan ZnO dapat mendekolorisasi larutan metilen biru 10 ppm dengan sinar cahaya tampak secara berturut-turut sebesar 98.15%, 97.76%, dan 90.92%, sedangkan dengan sinar matahari sebesar 99.16%, 98.35%, dan 99.01% selama 180 menit penyinaran dengan massa fotokatalis 0,05 gram.
Characterization and Application of Hydroxyapatite From Chicken Egg Shell with Green Template as a Potential Drug Delivery System Irwansyah, Ferli Septi; Nurizal, Abshar Fathur Rochman; Hadisantoso, Eko Prabowo; Zain, Shariffuddin Bin Md
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 10, No. 2, November 2024
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v10i2.41699

Abstract

Hydroxyapatite (HAp) is a calcium phosphate biomaterial widely studied in the medical field because of its good biocompatibility properties. This study aims to identify the effect of increasing variations in banana peel template concentration on the characteristics of hydroxyapatite so that it has the potential as a drug delivery system. This study includes the characterization and application of the potential of the hydroxyapatite drug delivery system with the addition of variations in the concentration of green template. Then, hydroxyapatite was characterized using X-ray diffraction (XRD) and a surface area analyzer (SAA). This study's results indicate that adding a banana peel template affects the characteristics of hydroxyapatite. The higher the template concentration, the smaller the crystallite size, pore size, pore volume, and surface area, but the degree of crystallinity is greater. The results showed that the characterization of hydroxyapatite K15% with a crystal size of 34.73 nm, a degree of crystallinity of 89%, a pore size of 7.2178 nm, a surface area of 30.111 m2/g, and a pore volume of 0.1145 cc/g. The results of the study of the potential of the drug delivery system obtained a loading efficiency value of 67% for ibuprofen. However, the ibuprofen release process results at time intervals tend to be unstable.
Characterization and Application of Hydroxyapatite From Chicken Egg Shell with Green Template as a Potential Drug Delivery System Irwansyah, Ferli Septi; Nurizal, Abshar Fathur Rochman; Hadisantoso, Eko Prabowo; Zain, Shariffuddin Bin Md
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 10, No. 2, November 2024
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v10i2.41699

Abstract

Hydroxyapatite (HAp) is a calcium phosphate biomaterial widely studied in the medical field because of its good biocompatibility properties. This study aims to identify the effect of increasing variations in banana peel template concentration on the characteristics of hydroxyapatite so that it has the potential as a drug delivery system. This study includes the characterization and application of the potential of the hydroxyapatite drug delivery system with the addition of variations in the concentration of green template. Then, hydroxyapatite was characterized using X-ray diffraction (XRD) and a surface area analyzer (SAA). This study's results indicate that adding a banana peel template affects the characteristics of hydroxyapatite. The higher the template concentration, the smaller the crystallite size, pore size, pore volume, and surface area, but the degree of crystallinity is greater. The results showed that the characterization of hydroxyapatite K15% with a crystal size of 34.73 nm, a degree of crystallinity of 89%, a pore size of 7.2178 nm, a surface area of 30.111 m2/g, and a pore volume of 0.1145 cc/g. The results of the study of the potential of the drug delivery system obtained a loading efficiency value of 67% for ibuprofen. However, the ibuprofen release process results at time intervals tend to be unstable.