Enhanced catalytic reduction of p-nitrophenol and azo dyes on copper hexacyanoferrate nanospheres decorated copper foams. (15th July 2022)

• Record Type: Journal Article
• Authors: Chen, Fei; Yan, Xinlong; Hu, Xiaoyan; Feng, Rui; Li, Tianbo; Li, Xiaobing; Zhao, Guofeng
• Is Part Of: Journal of environmental management. Volume 314(2022)
• Publication Date: 2022-07-15
• Subjects: copper Hexacyanoferrate -- Structured catalyst -- Nitrophenol -- Catalytic reduction -- Interface; Environmental policy -- Periodicals; Environmental management -- Periodicals; Environment -- Periodicals; Ecology -- Periodicals; 363.705
• DOI: 10.1016/j.jenvman.2022.115075
• Languages: English
• ISSNs: 0301-4797

Abstract

Abstract: Catalytic reduction of nitroaromatic compounds using low-cost non-precious metal containing catalyst remains an essential topic in wastewater treatment. Herein, copper hexacyanoferrate nanospheres decorated copper foams (CF) were prepared by a facile method, and it was used as structured catalysts for the reduction of p-nitrophenol (p-NP) and azo dyes. The catalyst obtained by calcination at 200 °C shows the highest catalytic activity, with an almost complete reduction of p-NP within 3 min with a rate of 2.057 min −1 at room temperature, and it exhibited excellent reusability in successive 6 cycles. The effects of temperature, initial concentration, pH, and flow rate on p-NP reduction were investigated. Moreover, the mechanistic investigation revealed that fast electron transfer ability and enhanced adsorption for p-NP contributed to its enhanced catalytic performances. This work put forward an efficient approach for the construction of structured catalysts with enhanced performance in catalytic reduction applications. Graphical abstract: Image 1 Highlights: Prussian-blue-analogues hollow spheres decorated copper foams catalyst was prepared. The catalyst exhibited ideal catalytic performance for p -nitrophenol hydrogenation. With ∼100% of p -nitrophenol reduced within 3 min and a high k app = 2.507 min −1 . Both Cu and Fe in the surface of the catalyst participate in the redox reaction. The electron transfer and affinity to p -nitrophenol contributes to the performance.