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Li J, Hua Y, Yuan Q, Gou W, Sun H, Lin L, Wang M, Yu M, Qin A. Fabrication of the Fe-Doped Corona Schiff Base for Enhanced Microwave Absorption Performance. ACS OMEGA 2023; 8:38885-38894. [PMID: 37901571 PMCID: PMC10600886 DOI: 10.1021/acsomega.3c02956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 10/04/2023] [Indexed: 10/31/2023]
Abstract
A corolla-shaped Schiff base polymer was synthesized from terephthalaldehyde (TPAD), glutaraldehyde (GA), and p-phenylenediamine (PPD) by block copolymerization, and Schiff base iron complexes were formed by doping with FeCl3. The microscopic morphology, crystal structure, and elemental valence state were characterized by field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Comparing the change of conductivity before and after Fe3+ doping, it was found that the conductivity did not break away from the category of insulator, and the doped sample is a paramagnetic material. Morphological changes were observed by adjusting the ratio of GA to TPAD, and it was found that the corolla-like structure was most complete when the ratio of GA to TPAD was 2:1, and its Schiff base iron complex absorbed waves better. At a thickness of 3 mm, the absorption effect can reach below -10 dB at 12.44-15.16 GHz, and the maximum absorption value is -45.07 dB at a thickness of 3.8 mm; it is an organic absorbing agent with excellent impedance matching and absorbing properties.
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Affiliation(s)
- Jun Li
- Henan
Engineering Technology Research Center for Fiber Preparation and Modification, Zhengzhou 450000, P. R. China
- College
of Materials Engineering, Henan University
of Engineering, Zhengzhou 450000, P. R. China
| | - Yuhang Hua
- College
of Materials Engineering, Henan University
of Engineering, Zhengzhou 450000, P. R. China
| | - Qiannan Yuan
- College
of Materials Engineering, Henan University
of Engineering, Zhengzhou 450000, P. R. China
| | - Wenqi Gou
- College
of Materials Engineering, Henan University
of Engineering, Zhengzhou 450000, P. R. China
| | - Hao Sun
- College
of Materials Engineering, Henan University
of Engineering, Zhengzhou 450000, P. R. China
| | - Long Lin
- College
of Materials Engineering, Henan University
of Engineering, Zhengzhou 450000, P. R. China
| | - Mengtao Wang
- College
of Materials Engineering, Henan University
of Engineering, Zhengzhou 450000, P. R. China
| | - Mingxun Yu
- China
North Industries Group, Corporation Institute 53, Ji’nan 250031, P. R. China
| | - Aiwen Qin
- Henan
Engineering Technology Research Center for Fiber Preparation and Modification, Zhengzhou 450000, P. R. China
- College
of Materials Engineering, Henan University
of Engineering, Zhengzhou 450000, P. R. China
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Ghanbari N, Ghafuri H. Preparation of novel Zn-Al layered double hydroxide composite as adsorbent for removal of organophosphorus insecticides from water. Sci Rep 2023; 13:10215. [PMID: 37353547 DOI: 10.1038/s41598-023-37070-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 06/15/2023] [Indexed: 06/25/2023] Open
Abstract
In this work, a new and efficient composite LDH with high adsorption power using layered double hydroxide (LDH), 2,4-toluene diisocyanate (TDI), and tris (hydroxymethyl) aminomethane (THAM) was designed and prepared, which was used as an adsorbent to adsorb diazinon from contaminated water. The chemical composition and morphology of the adsorbent were evaluated using Fourier transform infrared (FTIR), X-ray diffraction (XRD), thermal gravimetric analysis (TGA), Energy dispersive X-ray (EDX) and Field emission scanning electron microscopy (FESEM) techniques. Also, the optimal conditions for adsorption of diazinon from water were determined by LDH@TDI@THAM composite. Various parameters like the effect of adsorbent dosage, pH, concentration and contact time of diazinon were studied to determine the optimal adsorption conditions. Then, different isotherm models and kinetic adsorption were used to describe the equilibrium data and kinetic. Also, the maximum adsorption capacity is obtained when the pH of the solution is 7. The maximum adsorption capacity for LDH@TDI@THAM composite was 1000 mg/g at 65 °C and the negative values of ΔG indicate that the adsorption process is spontaneous. After that, studying the reusability of LDH@TDI@THAM composite showed that the removal of diazinon by LDH@TDI@THAM was possible for up to four periods without a significant decrease in performance.
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Affiliation(s)
- Nastaran Ghanbari
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846‑13114, Iran
| | - Hossein Ghafuri
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846‑13114, Iran.
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Chand K, Zhang X, Chen Y. Recent Progress in MXene and Graphene based Nanocomposites for Microwave Absorption and EMI Shielding. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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