One-step synthesis of nitrogen-grafted copper-gallic acid for enhanced methylene blue removal

Santoso, Shella Permatasari, Bundjaja, Vania, Angkawijaya, Artik Elisa, Gunarto, Chintya, Go, Alchris Woo, Yuliana, Maria, Nguyen Tran, Phuong Lan, Hsieh, Chang-Wei and Ju, Yi-Hsu (2021) One-step synthesis of nitrogen-grafted copper-gallic acid for enhanced methylene blue removal. One-step synthesis of nitrogen-grafted copper-gallic acid for enhanced methylene blue removal, 11 (8). p. 12021. ISSN 20452322, Jurnal Internasional Bereputasi SJR(2020): 1.24, Q1, H-Index: 213

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Abstract

Nitrogen-grafting through the addition of glycine (Gly) was performed on a metal- phenolic network (MPN) of copper (Cu2+) and gallic acid (GA) to increase its adsorption capacity. Herein, we reported a one-step synthesis method of MPN, which was developed according to the metal–ligand complexation principle. The nitrogen grafted CuGA (Ng-CuGA) MPN was obtained by reacting Cu2+, GA, and Gly in an aqueous solution at a molar ratio of 1:1:1 and a pH of 8. Several physicochemical measurements, such as Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), N2 sorption, X-ray diffraction (XRD), and thermal gravimetry analysis (TGA), were done on Ng-CuGA to elucidate its characteristics. The analysis revealed that the Ng-CuGA has non-uniform spherical shaped morphology with a pore volume of 0.56 cc/g, a pore size of 23.25 nm, and thermal stability up to 205 °C. The applicational potential of the Ng-CuGA was determined based on its adsorption capacity against methylene blue (MB). The Ng-CuGA was able to adsorb 190.81 mg MB per g adsorbent at a pH of 6 and temperature of 30 °C, which is 1.53 times higher than the non-grafted CuGA. Detailed assessment of Ng-CuGA adsorption properties revealed their pH- and temperature-dependent nature. The adsorption capacity and affinity were found to decrease at a higher temperature, demonstrating the exothermic adsorption behavior.

Item Type: Article
Additional Information: Jurnal Internasional Bereputasi SJR(2020): 1.24, Q1, H-Index: 213
Subjects: Engineering > Chemical Engineering
Divisions: Journal Publication
Depositing User: F.X. Hadi
Date Deposited: 13 Jul 2022 07:10
Last Modified: 03 Aug 2022 01:24
URI: http://repository.ukwms.ac.id/id/eprint/31458

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