Catalytic performance of boron-containing magnetic metal nanoparticles in methylene blue degradation reaction and mixture with other pollutants

• Published in: Inorganic chemistry communications Vol. 126; p. 108474
• Main Authors: Meydan, Engin, Demirci, Sahin, Aktas, Nahit, Sahiner, Nurettin, Ozturk, Omer Faruk
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.04.2021
• Subjects: Activation parameters; Catalysts; Methylen blue degradation; Shelf-life; TOF values; Shelf-life; TOF values; Activation parameters; Catalysts; Methylen blue degradation
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2021.108474

In this study, magnetic metal nanoparticles formed by using Fe, Co, Ni(II) metals were obtained in AOT reverse microemulsion system with NaBH4 reducing agent. The catalytic activities of its with magnetic effects in MB degradation reaction were investigated at different temperatures. The best catalytic activity was 37 ± 6 nm Co-MNPs with 90.6 ± 3.2% yield and TOF value of 0.040 (mole of MB) (molcatalyst.min)−1 in 13 min. at 30 °C. Its achieved the best catalytic effect with 85.4% conversion after 30 days on the shelf life. [Display omitted] •The Co-MNPs have better catalytic activity than Fe-MNPs and Ni-MNPs.•37±6 nm size of Co-MNPs achieved the best catalytic effect with 85.4% conversion.•The open air did not a disadvantage in terms of deformation of Co-MNPs surfaces.•The Co-MNPs can be used as an industrial catalyst in mixed pollutants environments. The catalytic effects of metal nanoparticles (MNPs) synthesized in sodium bis(2-ethylhexyl) sulfosuccinate (AOT) microemulsion system by using M(II) salts (M = Fe, Co, Ni) and NaBH4 reducing agent on methylene blue (MB) degradation reaction were investigated. It was determined that Co-MNPs gave the best catalytic activity among them. Influence of the reaction parameters e.g., reaction time, temperature, the size of catalyst and the MNP types on the catalytic performance were studied. It was found that 37 ± 6 nm Co-MNPs revealed the best catalytic activity in all studies. The best activation parameters were calculated as 13.6 ± 1.1 kJ mol−1 and ΔH = 10.7 ± 1.0 kJ mol−1 and ΔS = -87.9 ± 5.4 J mol−1 K−1. The activity % of Co-MNPs was calculated as 85.4 after 30 days on the shelf life study. The reusability studies were carried out and the activity of Co-MNPs at the 5th reuse was calculated as 70 ± 5%. Finally, the catalytic activity of Co-MNPs was investigated inside equal volumes of single and multiple solution mixtures containing MB, 4-Nitrophenol (4-NP) and Eosin Y (EY). In the examinations, it was observed that the nanocatalyst was effective as a reducing agent in all equal amount solutions (MB/4-NP, MB/EY, 4-NP/EY, and MB/4-NP/EY). And also, TOF (mole of MB/4-NP/EY) (mol catalyst.min)−1 values ​​of catalytic activities were also calculated.