Magnetization Study of Iron Sand from Sabang, Indonesia: The Potential of Magnetic Materials in the Photocatalytic Field
BULLETIN OF CHEMICAL REACTION ENGINEERING AND CATALYSIS(2023)
摘要
The magnetization of iron sand from Anoi Itam beach, Sabang, Indonesia, was investigated through sample test-ing and synthesis using the co-precipitation method. The purpose of this study is to analyze the magnetic proper-ties of iron sand and review its potential in photocatalytic processes. Before being synthesized, the natural ironsand was separated and milled. The iron sand was dissolved in 37% v/v HCl, stirred, and heated for 30 min. Thissolution was filtered and precipitated with 6.5 M NH4OH while stirring and heating for 30 min. The magnetiteformed was washed repeatedly with distilled water until it reached a normal pH, and then dried. Magnetite char-acterization tests were performed using XRF, XRD, VSM, and UV-Vis spectroscopy. The test results showed thatthe iron sand had a high magnetic quality with a concentration of 91.17% after the synthesis process. The result-ing magnetite phase structure had a spinal inverse cubic shape, with the highest peak at the Miller index (311).From the VSM test, it is known that the resulting magnetite exists in a soft magnetic form with superparamagnet-ic groups. From optical absorption, magnetite has a gap energy of approximately 2.8 eV. It can be concluded thatthe magnetite from Anoi Itam Sabang has potential as a photocatalytic absorbent in the visible light wavelengthregion
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关键词
Magnetite,co-precipitation method,iron sand,optical absorption,photocatalytic
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