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All Journal Jurnal Sains Materi Indonesia Journal of Current Studies in SDGs Journal of Current Studies in SDGs
Dina Kartika Maharani
State University of Surabaya
Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Environmental Science Materials Science & Nanotechnology Social Sciences Other

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THE EFFECT OF CALCINATION TEMPERATURE TO THE COMPOSITE CHARACTERISTICS OF TiO2SiO2 NANOPARTICLE Della Dwi Ananda; Dina Kartika Maharani
Jurnal Sains Materi Indonesia Vol 22, No 1: OCTOBER 2020
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jsmi.2020.22.1.6020

Abstract

THE EFFECT OF CALCINATION TEMPERATURE TO THE COMPOSITECHARACTERISTICS OF TiO2SiO2 NANOPARTICLE. Self-cleaning material is a material that utilizes the photocatalytic property to degrade organic and inorganic compounds with the help of UV light. One of the materials that have good photocatalytic property is TiO2, the photocatalytic property causes TiO2 to be amphiphilic: becomes hydrophilic when there is light and becomes hydrophobic when there is no light. The photocatalytic property of TiO2 can be improved with the addition of buffer material such as SiO2. TiO2SiO2 nanoparticle was synthesized using a sol-gel method with Titanium (IV) Isopropoxide (TTIP) precursors for TiO2 and Tetraethyl Orthosilicate (TEOS) precursors for SiO2 and followed by a variation of calcination temperature of 400 °C, 450 °C, 500 °C, and 550 °C for 2 hours. TiO2SiO2 composite was synthesized using composition TiO2 sol 75% and SiO2 25%. The result of the synthesis TiO2SiO2 composite was characterized by Fourier Transform Infra-Red (FT-IR) instrument to determine the functional groups in the composites and X-Ray Diffraction (XRD) instruments to determine the phase, crystallite size and degree of crystallinity in the composite. The purpose of this research is to synthesized TiO2SiO2 nanoparticle as a self cleaning agent with variation of the calcination temperature, to obtain composite characteristics that can support self cleaning. The self-cleaning ability was based on a produced composite characteristic of TiO2SiO2. The result of FTIR characterization showed that at calcination temperature of 400 °C, 450 °C, 500 °C, and 550 °C there was a Ti-OSi bond at the peak of 948.91 cm-1, 950.77 cm-1, 941.13 cm-1, 942.13 cm-1. The result of XRD characterization showed that at the temperature of 400 °C had the best characteristics, the 75.27% anatase phase and brookite phase 24.72%. Calcinations temperature 400 °C had best degree of crystallinity of 91.66%.
Functionalization of L-Cystein On Magnetite As Magnetic Adsorbent  Metals for SDG 14 Amaria Amaria; Dina Kartika Maharani; Amalia Putri Purnamasari; Sari Edi Cahyaningrum; Aisha Setiyanti
Journal of Current Studies in SDGs Vol. 3 No. 1 (2027): March
Publisher : Sekolah Tinggi Agama Islam Sabilul Muttaqin Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63230/jocsis.3.1.251

Abstract

Objective: The increasing consumption of gold (Au) in the electronics, catalysis, and medical sectors has led to the depletion of primary ore resources while increasing the accumulation of electronic waste (e-waste) which reaches 62 million tons per year globally. Therefore, the development of selective, efficient, and environmentally friendly Au(III) recovery technology from secondary sources is very urgent. This study aims to synthesize and characterize magnetic adsorbents based on magnetite (Fe3O4@Cys) functionalized with L-Cysteine (Fe3O4@Cys) and evaluate its performance in the recovery of Au(III) ions from aqueous solutions. Method: L-Cysteine was chosen because it contains a thiol group (-SH) which has a high affinity for Au(III) based on the hard-soft acid-base (HSAB) theory. The synthesis was conducted through silica coating followed by L-cysteine immobilization using GPTMS as a coupling agent.  Results:  FTIR analysis confirmed the presence of Fe–O, Si–O–Si, and Si–OH groups, indicating successful functionalization. XRD results showed that the magnetite crystal structure was retained after modification, with a crystallite size of 16.43 nm and the presence of amorphous silica.  Novelty: The synthesized Fe3O4@Cys exhibited good acid stability, demonstrating its potential as a selective magnetic adsorbent for Au(III) recovery from secondary resources.
Functionalization of L-Cystein On Magnetite As Magnetic Adsorbent  Metals for SDG 14 Amaria Amaria; Dina Kartika Maharani; Amalia Putri Purnamasari; Sari Edi Cahyaningrum; Aisha Setiyanti
Journal of Current Studies in SDGs Vol. 3 No. 1 (2027): March
Publisher : Sekolah Tinggi Agama Islam Sabilul Muttaqin Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63230/jocsis.3.1.251

Abstract

Objective: The increasing consumption of gold (Au) in the electronics, catalysis, and medical sectors has led to the depletion of primary ore resources while increasing the accumulation of electronic waste (e-waste) which reaches 62 million tons per year globally. Therefore, the development of selective, efficient, and environmentally friendly Au(III) recovery technology from secondary sources is very urgent. This study aims to synthesize and characterize magnetic adsorbents based on magnetite (Fe3O4@Cys) functionalized with L-Cysteine (Fe3O4@Cys) and evaluate its performance in the recovery of Au(III) ions from aqueous solutions. Method: L-Cysteine was chosen because it contains a thiol group (-SH) which has a high affinity for Au(III) based on the hard-soft acid-base (HSAB) theory. The synthesis was conducted through silica coating followed by L-cysteine immobilization using GPTMS as a coupling agent.  Results:  FTIR analysis confirmed the presence of Fe–O, Si–O–Si, and Si–OH groups, indicating successful functionalization. XRD results showed that the magnetite crystal structure was retained after modification, with a crystallite size of 16.43 nm and the presence of amorphous silica.  Novelty: The synthesized Fe3O4@Cys exhibited good acid stability, demonstrating its potential as a selective magnetic adsorbent for Au(III) recovery from secondary resources.
Co-Authors Aisha Setiyanti Amalia Putri Purnamasari Amaria Amaria Della Dwi Ananda Sari Edi Cahyaningrum