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Wang WL, Kanno A, Ishiguri A, Jin RH. Generation of sub-5 nm AuNPs in the special space of the loop-cluster corona of a polymer vesicle: preparation and its unique catalytic performance in the reduction of 4-nitrophenol. NANOSCALE ADVANCES 2023; 5:2199-2209. [PMID: 37056615 PMCID: PMC10089077 DOI: 10.1039/d2na00893a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 02/22/2023] [Indexed: 06/19/2023]
Abstract
The hybrid vesicle AuNP@LCCV, in which a large number of AuNPs with an average size of about 2.8 nm were densely and uniformly distributed in an isolated state throughout the corona of the unusual polymer vesicle, was prepared via in situ reduction of Au3+ ions, which were encapsulated in advance in the unique polymer vesicle (LCCV) consisting of a hydrophobic membrane of poly(2-phenyl-2-oxazoline) and a hydrophilic loop-cluster corona of polyethyleneimine. The vesicle was formed via self-assembly from a comb-like block copolymer in which a polystyrenic main chain was grafted densely with diblock polyethyleneimine-b-poly(2-phenyl-2-oxazoline) and acted as a reactor for the reduction of Au3+. The hybrid vesicle AuNP@LCCV showed powerful catalytic ability in the reduction of nitrophenols (NPs). Interestingly, the reduction reactions of NPs showed a remarkably long induction time, which could be shortened dramatically from 60 min to 1-2 min by greatly increasing the concentration of NaBH4. It is revealed that the oxygen adsorbed on the AuNPs significantly inhibited the reduction, causing the induction time. Once the oxygen is chemically cleaned from the surface of the AuNPs, the reduction of 4-NP proceeds gradually for a while and then completes suddenly. The reduction mechanism accompanying the oxygen-dependent induction time is proposed from the view of the strong oxygen affinity of the catalyst AuNP@LCCV.
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Affiliation(s)
- Wen-Li Wang
- Department of Material and Life Chemistry, Kanagawa University 3-27-1 Rokkakubashi Yokohama 221-8686 Japan
| | - Ayaka Kanno
- Department of Material and Life Chemistry, Kanagawa University 3-27-1 Rokkakubashi Yokohama 221-8686 Japan
| | - Amika Ishiguri
- Department of Material and Life Chemistry, Kanagawa University 3-27-1 Rokkakubashi Yokohama 221-8686 Japan
| | - Ren-Hua Jin
- Department of Material and Life Chemistry, Kanagawa University 3-27-1 Rokkakubashi Yokohama 221-8686 Japan
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2
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Tseng W, Wang I, Aiyu L, Hsieh M, Tseng W. Blue‐green
emission of
pepsin‐stabilized
copper nanoclusters ultrafast detection of hemoglobin in human urine. J CHIN CHEM SOC-TAIP 2022. [DOI: 10.1002/jccs.202200177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Wei‐Bin Tseng
- College of Ecology and Resource Engineering Wuyi University Jiangmen China
- Department of Chemistry National Sun Yat‐sen University Kaohsiung Taiwan
| | - Ing‐Ting Wang
- Department of Chemistry National Sun Yat‐sen University Kaohsiung Taiwan
| | - Lin Aiyu
- Department of Chemistry National Sun Yat‐sen University Kaohsiung Taiwan
| | - Ming‐Mu Hsieh
- Department of Chemistry National Kaohsiung Normal University Kaohsiung Taiwan
| | - Wei‐Lung Tseng
- Department of Chemistry National Sun Yat‐sen University Kaohsiung Taiwan
- School of Pharmacy, College of Pharmacy Kaohsiung Medical University Kaohsiung Taiwan
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3
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Riaz M, Sharafat U, Zahid N, Ismail M, Park J, Ahmad B, Rashid N, Fahim M, Imran M, Tabassum A. Synthesis of Biogenic Silver Nanocatalyst and their Antibacterial and Organic Pollutants Reduction Ability. ACS OMEGA 2022; 7:14723-14734. [PMID: 35557704 PMCID: PMC9088900 DOI: 10.1021/acsomega.1c07365] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 04/01/2022] [Indexed: 05/24/2023]
Abstract
Plant-mediated nanoparticles are gaining popularity due to biologically active secondary metabolites that aid in green synthesis. This study describes a simple, environmentally friendly, dependable, and cost-effective production of silver nanoparticles utilizing Cucumis sativus and Aloe vera aqueous leaf extracts. The aqueous leaf extracts of Cucumis sativus and Aloe vera, which worked as a reducing and capping agent, were used to biosynthesize silver nanoparticles (AgNPs). The formation of surface plasmon resonance peaks at 403 and 405 nm corresponds to the formation of colloidal Ag nanoparticles. Similarly, the Bragg reflection peaks in X-ray diffraction patterns observed at 2θ values of 38.01°, 43.98°, 64.24°, and 77.12° representing the planes of [111], [200], [220], and [311] correspond to the face-centered cubic crystal structure of silver nanoparticles. Fourier transform infrared spectroscopy confirms that bioactive chemicals are responsible for the capping of biogenic silver nanoparticles. The size, structure, and morphology of AgNPs with diameters ranging from 8 to 15 nm were examined using transmission electron microscopy. Water contamination by azo dyes and nitrophenols is becoming a more significant threat every day. The catalytic breakdown of organic azo dye methyl orange (MO) and the conversion of para-nitrophenol (PNP) into para-aminophenol using sodium borohydride was evaluated using the prepared biogenic nanoparticles. Our nanoparticles showed excellent reduction ability against PNP and MO with rate constants of 1.51 × 10-3 and 6.03 × 10-4s-1, respectively. The antibacterial activity of the nanomaterials was also tested against four bacteria: Staphylococcus aureus, Klebsiella pneumoniae, Enterobacter, and Streptococcus pneumoniae. These biogenic AgNPs displayed effective catalytic and antibacterial characteristics by reducing MO and PNP and decreasing bacterial growth.
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Affiliation(s)
- Muhammad Riaz
- Department
of Biological Sciences, International Islamic
University Islamabad, Islamabad 44000, Pakistan
- School
of Electrical Engineering and Computer Science, University of Ottawa, Ottawa K1N 6N5, Ontario, Canada
| | - Uzma Sharafat
- Institute
of Chemical Sciences, University of Swat, Swat 19200, Khyber Pakhtunkhwa, Pakistan
| | - Nafeesa Zahid
- Department
of Botany, Mirpur University of Science
and Technology, Mirpur 10250, Azad Kashmir, Pakistan
| | - Muhammad Ismail
- Department
of Chemistry, Kohat University of Science
& Technology, Kohat 26000, Khyber Pakhtunkhwa, Pakistan
| | - Jeongwon Park
- School
of Electrical Engineering and Computer Science, University of Ottawa, Ottawa K1N 6N5, Ontario, Canada
- Department
of Electrical and Biomedical Engineering, University of Nevada, Reno 89557, Nevada, United States
| | - Bashir Ahmad
- Department
of Biological Sciences, International Islamic
University Islamabad, Islamabad 44000, Pakistan
| | - Neelum Rashid
- Department
of Botany, Mirpur University of Science
and Technology, Mirpur 10250, Azad Kashmir, Pakistan
| | - Muhammad Fahim
- Department
of Biological Sciences, International Islamic
University Islamabad, Islamabad 44000, Pakistan
| | - Muhammad Imran
- Department
of Biological Sciences, International Islamic
University Islamabad, Islamabad 44000, Pakistan
| | - Aisha Tabassum
- Department
of Biochemistry, University of Sialkot, Sialkot 51040, Pakistan
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4
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Jiang W, Wu Y, Zhang X, Chen D, Ma Y, Yang W. Novel Bismaleimide Porous Polymer Microsphere by Self-Stabilized Precipitation Polymerization and Its Application for Catalytic Microreactors. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00098] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Wenxing Jiang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yingxue Wu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xianhong Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Dong Chen
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yuhong Ma
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- Key Laboratory of Carbon Fiber and Functional Polymers of the Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Wantai Yang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- Key Laboratory of Carbon Fiber and Functional Polymers of the Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- Beijing Advanced Innovation Centre for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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