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Gai T, Jiang J, Wang S, Ren Y, Yang S, Qin Z, Shao L, Wu Q, Zhang J, Liao J. Photoreduced Ag +/sodium alginate supramolecular hydrogel as a sensitive SERS membrane substrate for rapid detection of uranyl ions. Anal Chim Acta 2024; 1316:342826. [PMID: 38969424 DOI: 10.1016/j.aca.2024.342826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 05/24/2024] [Accepted: 06/04/2024] [Indexed: 07/07/2024]
Abstract
BACKGROUND In the fields of environmental monitoring and nuclear emergency, in order to obtain the relevant information of uranyl-induced environmental pollution and nuclear accident, it is necessary to establish a rapid quantitative analytical technique for uranyl ions. As a new promising technique, surface-enhanced Raman scattering (SERS) is hopeful to achieve this goal. However, uranyl ions are easily desorbed from SERS substrates under acidic conditions, and the structures of SERS substrates will be destroyed in the strong acidic aqueous solutions. Besides, the quantitative detection ability of SERS for uranyl ions needs to be promoted. Hence, it is necessary to develop new SERS substrates for accurate quantitative detection of trace uranyl in environmental water samples, especially in acidic solutions. RESULTS In this work, we prepared silver ions/sodium alginate supramolecular hydrogel membrane (Ag+/SA SMH membrane), and the Ag+ ions from the membrane were transformed into Ag/Ag2O complex nanoparticles under laser irradiation. The Raman signal of uranyl was strongly enhanced under the synergistic interaction of electromagnetic enhancement derived from the Ag nanoparticles and charge transfer enhancement between uranyl and Ag2O. Utilizing the peak of SA (550 cm-1) as an internal standard, a quantitative detection with a LOD of 6.7 × 10-9 mol L-1 was achieved due to a good linear relation of uranyl concentrations from 1.0 × 10-8 mol L-1 to 2 × 10-6 mol L-1. Furthermore, foreign metal ions hardly affected the SERS detection of uranyl, and the substrate could determine trace uranyl in natural water samples. Particularly, the acidity had no obvious effect on SERS signals of uranyl ions. Therefore, in addition to the detection of uranyl ions in natural water samples, the proposed strategy could also detect uranyl ions in strong acidic solutions. SIGNIFICANCE AND NOVELTY A simple one-step method was used to prepare an Ag+/SA SMH membrane for rapid quantitative detection of uranyl ions for the first time. The proposed substrate successfully detected uranyl ions under acidic conditions by immobilizing uranyl ion in hydrogel structure. In comparison with the previous studies, a more accurate quantitative analysis for uranyl ions was achieved by using an internal standard, and the proposed strategy could determine trace uranyl in either natural water samples or strong acidic solutions.
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Affiliation(s)
- Tao Gai
- Institute of Materials, China Academy of Engineering Physics, PO Box 9071-11, Mianyang, PR China
| | - Jiaolai Jiang
- Institute of Materials, China Academy of Engineering Physics, PO Box 9071-11, Mianyang, PR China
| | - Shaofei Wang
- Institute of Materials, China Academy of Engineering Physics, PO Box 9071-11, Mianyang, PR China.
| | - Yiming Ren
- Institute of Materials, China Academy of Engineering Physics, PO Box 9071-11, Mianyang, PR China
| | - Shanli Yang
- Institute of Materials, China Academy of Engineering Physics, PO Box 9071-11, Mianyang, PR China
| | - Zhen Qin
- Institute of Materials, China Academy of Engineering Physics, PO Box 9071-11, Mianyang, PR China
| | - Lang Shao
- Institute of Materials, China Academy of Engineering Physics, PO Box 9071-11, Mianyang, PR China
| | - Qian Wu
- Institute of Materials, China Academy of Engineering Physics, PO Box 9071-11, Mianyang, PR China
| | - Jun Zhang
- Institute of Materials, China Academy of Engineering Physics, PO Box 9071-11, Mianyang, PR China
| | - Junsheng Liao
- Institute of Materials, China Academy of Engineering Physics, PO Box 9071-11, Mianyang, PR China.
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Wang Z, Gao Q, Hou B, Wang W, Xu L, Wang W. One-Step Synthesis of Silver Nanoparticles Embedded in Biobased Polyamide 56 Nanofibers with High Antibacterial Activity. ACS OMEGA 2024; 9:19272-19281. [PMID: 38708284 PMCID: PMC11064031 DOI: 10.1021/acsomega.4c00176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 03/11/2024] [Accepted: 04/09/2024] [Indexed: 05/07/2024]
Abstract
Embedded silver nanoparticles (Ag NPs) within nanofibers represent a highly promising alternative to common antimicrobial materials, due to the combined effective biocidal properties of Ag NPs with the biocompatibility and environmental friendliness of biobased polymers. In this study, we presented a novel one-step route to fabricate biobased polyamide 56 (PA56) nanofibers embedded with uniform Ag NPs. The process involved mixing reactive silver ammonia with PA56 solutions and then using formic acid as a reducing agent. Continuous electrospinning resulted in solvent evaporation, yielding Ag NPs highly dispersed within PA56 nanonet fibrous structures (PA56/Ag). Characterization assays confirmed the successful impregnation of Ag NPs in PA56 nanofibers, with an average size of about 32.4 nm. PA56/Ag nanofibers also displayed suitable morphology, mechanical properties, and good biocompatibility in vitro. Moreover, their antimicrobial effectiveness was evaluated against Staphylococcus aureus and Escherichia coli. Collectively, the proposed PA56/Ag nanofibers possess desirable characteristics suitable for antimicrobial applications.
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Affiliation(s)
- Zhen Wang
- The
First Hospital of Jiaxing, First Affiliated
Hospital of Jiaxing University, Jiaxing 314001, China
| | - Qing Gao
- The
First Hospital of Jiaxing, First Affiliated
Hospital of Jiaxing University, Jiaxing 314001, China
| | - Bailong Hou
- The
First Hospital of Jiaxing, First Affiliated
Hospital of Jiaxing University, Jiaxing 314001, China
| | - Wei Wang
- The
First Hospital of Jiaxing, First Affiliated
Hospital of Jiaxing University, Jiaxing 314001, China
| | - Liya Xu
- College
of Materials and Textile Engineering, Jiaxing
University, Jiaxing 314001, China
- Zhe
Jiang TaiHua New Material Co., Ltd., Jiaxing 314001, China
| | - Wei Wang
- College
of Materials and Textile Engineering, Jiaxing
University, Jiaxing 314001, China
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Synthesis and characterization of PVA embedded with peanut-shaped AgcAus nanoparticles: optical and electrical properties. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04396-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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