TY - JOUR

T1 - Nitrogen-rich covalent organic polymer-hybridized CuFe2O4-based magnetic nanoparticles for efficient iodine adsorption and Cr(VI) reduction

AU - Askari, Saeed

AU - Mehdi Khodaei, Mohammad

AU - Benassi, Enrico

PY - 2024/9/11

Y1 - 2024/9/11

N2 - In this study, a magnetic covalent organic polymer nanohybrid, CuFe2O4@CGP, was prepared by a reaction between cyanuric chloride and guanidinium chloride in the presence of CuFe2O4, and fully characterized. The CuFe2O4@CGP nanohybrid showed promising activity for the adsorption of I2 in cyclohexane compared to previous works with a theoretical maximum adsorption capacity (Qmax) of 769.23 mg/g and a removal efficiency of 98.31 % of I2 which was significantly higher than that of bare CuFe2O4 due to a conjugated π-electron system, N–H-containing and surface –OH groups. The pseudo-second-order kinetic model and the Langmuir model provided a better fit for I2 adsorption over CuFe2O4@CGP. The process of I2 adsorption on the CuFe2O4@CGP surface was also investigated by quantum chemical calculations. Furthermore, the CuFe2O4@CGP acted as a bifunctional catalyst for the efficient decomposition of HCOOH to H2 and CO2 and the reduction of highly toxic Cr(VI) to low-toxic Cr(III) in an aqueous medium. The CuFe2O4@CGP nanohybrid was more efficient than the bare CuFe2O4 NPs with a higher rate constant (0.36 min−1) and activity parameter (0.30 s−1 g−1). The CuFe2O4@CGP nanohybrid showed recoverability and reusability up to six- and five times for the adsorption/desorption process and reduction, respectively.

AB - In this study, a magnetic covalent organic polymer nanohybrid, CuFe2O4@CGP, was prepared by a reaction between cyanuric chloride and guanidinium chloride in the presence of CuFe2O4, and fully characterized. The CuFe2O4@CGP nanohybrid showed promising activity for the adsorption of I2 in cyclohexane compared to previous works with a theoretical maximum adsorption capacity (Qmax) of 769.23 mg/g and a removal efficiency of 98.31 % of I2 which was significantly higher than that of bare CuFe2O4 due to a conjugated π-electron system, N–H-containing and surface –OH groups. The pseudo-second-order kinetic model and the Langmuir model provided a better fit for I2 adsorption over CuFe2O4@CGP. The process of I2 adsorption on the CuFe2O4@CGP surface was also investigated by quantum chemical calculations. Furthermore, the CuFe2O4@CGP acted as a bifunctional catalyst for the efficient decomposition of HCOOH to H2 and CO2 and the reduction of highly toxic Cr(VI) to low-toxic Cr(III) in an aqueous medium. The CuFe2O4@CGP nanohybrid was more efficient than the bare CuFe2O4 NPs with a higher rate constant (0.36 min−1) and activity parameter (0.30 s−1 g−1). The CuFe2O4@CGP nanohybrid showed recoverability and reusability up to six- and five times for the adsorption/desorption process and reduction, respectively.

KW - Catalytic reduction

KW - Covalent organic polymer

KW - CuFe2O4 MNPs

KW - DFT

KW - Environmental treatment

KW - Iodine adsorption and release

UR - https://www.mendeley.com/catalogue/5fb302a8-355f-3549-951e-5d63865a04d8/

U2 - 10.1016/j.inoche.2024.113136

DO - 10.1016/j.inoche.2024.113136

M3 - Article

VL - 169

JO - Inorganic Chemistry Communication

JF - Inorganic Chemistry Communication

SN - 1387-7003

M1 - 113136

ER -