The structure of hematite pigment from lathe waste using guava leave extract by Hydrothermal Method

Khoiroh, Lilik Miftahul ORCID: https://orcid.org/0000-0001-6634-6571, Nisa, DIta Aidatun and Akbar, Ramadana Fatahillah Al (2025) The structure of hematite pigment from lathe waste using guava leave extract by Hydrothermal Method. Presented at The Structure of Hematite Pigment from Lathe Waste Using Guava Leave Extract by Hydrothermal Method, Oktober, Malang.

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Abstract

Lathe waste contains 97% iron, which has the potential as a raw material for producing hematite pigment (α-Fe2O3). Guava leaf extract contains tannin, a reducing agent in synthesizing hematite. In this study, hematite was synthesized using the hydrothermal method at temperatures of 120, 140, and 160°C, then calcined for 3 hours at a temperature of 750°C. XRD, Color reader, FTIR, and SEM characterized the resulting products. The XRD characterization shows that the product before and after calcination was hematite with a rhombohedral structure. Hematite before calcination resulted in an amorphous phase and formed high crystallinity and purity after calcination. The crystal size of hematite ranges from 24.8-34.2 nm. The Color values such as the degree of redness, yellowness, brightness, chroma, and hue are by the hematite pigment standard. The results of FTIR identiXication on samples before and after calcination have formed hematite with a typical Fe-O group at wave numbers 471 and 575 cm-1. SEM results show that the resulting morphology was not uniform, and aggregate occurs, the necessity for further research to optimize the material's properties, thereby improving its functionality for applications as a pigment and in other relevant Xields.

Item Type:	Conference (Paper)
Keywords:	Amorphous; Crystalline; Guava Leaf; Hematite; Hydrothermal
Subjects:	03 CHEMICAL SCIENCES > 0303 Macromolecular and Materials Chemistry > 030301 Chemical Characterisation of Materials
Divisions:	Faculty of Mathematics and Sciences > Department of Chemistry
Depositing User:	lilik miftahul khoiroh
Date Deposited:	24 Jan 2025 14:54

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