Work

Preparation of Recyclable Magnetic Catalyst (Pd/PDA@Fe3O4) and the Catalytic Degradation of 4-Nitrophenol and Rhodamine B

Year: 2025

Type: article

Abstract: A magnetic shell-structured nano-catalyst was prepared by self-polymerization of dopamine wrapped by ferric oxide as the carrier, which was loaded with palladium nanoparticles (Pd/PDA@Fe3O4). The presence of magnetic Fe3O4 made it easy for nanoscale palladium particles to recover and prevent the loss of palladium nanoparticles that is unavoidable in traditional usage and preparation procedures. The catalyst was characterized by X-ray diffraction, fourier transform infrared spectroscopy, scanning electron microscopy, thermal weight loss analysis, Raman spectroscopy, X-ray photo-electron spectroscopy, and magnetic properties analysis. The catalytic performance of the prepared catalyst was investigated taking 4-nitrophenol (10 mg/L) and rhodamine B (15 mg/L) as the target pollutants. The results showed that under the conditions of 35 °C, pH = 7 and a catalyst dosage of 3 mg, the catalytic reduction efficiency of 4-nitrophenol, rhodamine B, and the mixture of them all can reach 99%. The catalytic efficiency of Pd/PDA@Fe3O4 remained above 90% after being used 10 times. The shell structure of Fe3O4 made it possible and easy to recover and recycle the nanoscale palladium, which was a real problem in the usage of nano-catalysts. At the same time, the problem of separation and recovery of palladium nano-catalyst is solved by magnetism, which provides research ideas for the recycling and utilization of nano-materials.

Source: Catalysts

DOI: 10.3390/catal15020175

Authors: Wei Wang, Jiaqi Liu, Guang Shi, Shiqi Wu, Shihan Zhang, Ruixia Yuan

Institutions: Northeast Petroleum University, Daqing Oilfield of CNPC

Language: English

Topic: Nanomaterials for catalytic reactions

Subfield: Organic Chemistry

Field: Chemistry

Domain: Physical Sciences

SDG: Responsible consumption and production

Open Access status: gold

Estimated APC paid: $2,654