Excellent nitroarene reduction activity of ilmenite nanochips prepared by facile template-free hydrothermal synthesis. Issue 19 (1st October 2022)

• Record Type: Journal Article
• Authors: Sekar, Sankar; Kumar, Subalakshmi; Lee, Youngmin; Jun, Hyewon; Yun, Jiseop; Maiyalagan, Thandavarayan; Lee, Sejoon
• Is Part Of: Ceramics international. Volume 48:Issue 19(2022)Part B
• Page Start: 29421
• Page End: 29428
• Publication Date: 2022-10-01
• Subjects: FeTiO3 -- Catalyst -- 4-Nitrophenol -- 4-Aminophenol -- Reduction; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.06.143
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Aiming at demonstrating the highly-efficient catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP), we synthesized the ilmenite (FeTiO3 ) nanochips by using the facile template-free hydrothermal growth technique, and characterized their material properties and catalytic reduction activities. To investigate the effects of the hydrothermal reaction temperatures on the morphological, textural, and 4-NP reduction characteristics, the rhombohedral FeTiO3 nanochips were prepared at three different temperatures of 120, 150, and 180 °C. Among them, the FeTiO3 nanochips prepared at 180 °C displayed to possess more homogeneous distributions in their morphological shape and average size, compared to those of other samples. Furthermore, the high porosity ( i . e ., specific surface area: 95.3 m 2 /g, total pore volume: 0.1275 cm 3 /g) and the high charge transfer activity (Fe 2+ + Ti 4+ → Fe 3+ + Ti 3+ ) of the 180 °C-synthesized FeTiO3 nanochips enabled us to demonstrate the excellent 4-NP–to–4-AP reduction performances with a high reduction rate (∼91%) for a short reduction time (6 min). The results advocate that the FeTiO3 nanochips can be effectively utilized as a 4-NP reduction catalyst for future environmental technology.