Sintesis Keramik Komposit ZrO2-ZnFe2O4 sebagai Fotokatalis Magnetik untuk Degradasi Metilen Biru

Abstract

<p><span id="docs-internal-guid-68508cfe-7fff-d25e-0f84-7350cca15ad0"><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;">Metilen biru merupakan salah satu zat pewarna dalam limbah cair tekstil yang dapat merusak ekosistem perairan dan mempunyai nilai ambang batas 5 mg/L. Salah satu cara untuk mengolah MB dalam larutan yaitu dengan fotokatalisis mengingat sederhana, cepat, dan mudah diregenerasi. Namun, cara ini memiliki kekurangan yakni waktu pemisahan yang lama. Penambahan sifat magnetik ke dalam material fotokatalis yang kemudian disebut fotokatalis magnetik dapat mengatasi kelemahan dari fotokatalis konvensional. Dalam penelitian ini, fotokatalis magnetik berbasis komposit ZrO</span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: 0.6em; vertical-align: sub;">2</span></span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;">-ZnFe</span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: 0.6em; vertical-align: sub;">2</span></span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;">O</span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: 0.6em; vertical-align: sub;">4</span></span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;"> telah berhasil disintesis menggunakan metode kopresipitasi sederhana dengan memanfaatkan mineral lokal pasir Zircon. Komposit yang dihasilkan dikarakterisasi menggunakan </span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-style: italic; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;">X-Ray Diffraction</span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;"> (XRD), </span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-style: italic; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;">Scanning Electron Microscopy with Energy Dispersive Spectroscopy </span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;">(SEM/EDS), </span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-style: italic; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;">Surface Area Analyzer</span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;"> (SAA). Evaluasi terhadap kinerja fotokatalis diamati menggunakan metode spektrofotometri UV-Vis. ZrO</span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: 0.6em; vertical-align: sub;">2</span></span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;">-ZnFe</span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: 0.6em; vertical-align: sub;">2</span></span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;">O</span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: 0.6em; vertical-align: sub;">4 </span></span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;">yang dihasilkan mengandung kristal ZnFe</span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: 0.6em; vertical-align: sub;">2</span></span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;">O</span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: 0.6em; vertical-align: sub;">4 </span></span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;">berstruktur kubik. Partikel komposit memiliki bentuk irregular dan teraglomerasi. Komposit mengandung 6,52 Zr; 9,31 Zn; 23,58 Fe; dan 58,73 O dalam %atom, sesuai dengan stoikiometrinya. Luas permukaan spesifik ZrO</span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: 0.6em; vertical-align: sub;">2</span></span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;">-ZnFe</span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: 0.6em; vertical-align: sub;">2</span></span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;">O</span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: 0.6em; vertical-align: sub;">4 </span></span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;">sebesar 112,375 m</span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: 0.6em; vertical-align: super;">2</span></span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;">/g. Sifat magnet dikonfirmasi menggunakan medan magnet ekstenal yang menunjukkan bahwa komposit ZrO</span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: 0.6em; vertical-align: sub;">2</span></span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: transparent; font-variant-numeric: normal; font-variant-east-asian: normal; vertical-align: baseline; white-space: pre-wrap;">-ZnFe</span><span style="font-size: 8.5pt; font-family: 'Times New Roman'; background-color: t