Cu/Fe3O4@carboxylate-rich carbon composite: One-pot synthesis, characterization, adsorption and photo-Fenton catalytic activities. (September 2020)

• Record Type: Journal Article
• Authors: Le, Van Thuan; Doan, Van Dat; Tran, Vy Anh; Le, Hoang Sinh; Tran, Dai Lam; Pham, Thanh Minh; Tran, Thi Huong; Nguyen, Hoai Thuong
• Is Part Of: Materials research bulletin. Volume 129(2020)
• Publication Date: 2020-09
• Subjects: A. Cu/Fe3O4@carboxylate-rich carbon -- B. One-pot synthesis -- D. Adsorption -- D. Photo-Fenton -- D. Catalytic activity; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2020.110913
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Cu/Fe3 O4 @carboxylate-rich carbon composite was prepared via a one-pot synthesis. The composite showed the excellent adsorption and catalytic activities toward MB. Optimal experimental conditions for the adsorption and photo-Fenton process were examined. The possible mechanisms for the adsorption and degradation of MB were proposed. The catalyst remained high degradation efficiency of about 90 % after five cycles. Abstract: A novel Cu/Fe3 O4 nanocomposite supported on carboxylate-rich carbon (Cu/Fe3 O4 @CRC) was successfully synthesized and characterized. The prepared composite was applied as an adsorbent and photo-Fenton-like catalyst for removal of methylene blue (MB). The results indicate that Cu/Fe3 O4 @CRC exhibited the highest adsorption and catalytic activities toward MB at the Fe/Cu molar ratio of 1:1 and 1:0.5, respectively. The adsorption process was thermodynamically spontaneous, endothermic, and followed well pseudo-first-order kinetic and the Freundlich isotherm models. The maximum adsorption capacity was found to be 240.27 mg g −1 at pH 7, the contact time of 40 min and temperature of 25 °C. The photo-Fenton degradation efficiency achieved 97.5 % under visible light irradiation for 40 min at optimal conditions of MB concentration of 40 mg L −1, catalyst dosage of 0.2 g L −1, pH 6.0, and H2 O2 concentration of 4 mmol L −1 . Besides, Cu/Fe3 O4 @CRC displayed a high removal efficiency and stability after five reaction cycles.