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Strapasson GB, de C Flach E, Assis M, Corrêa SA, Longo E, Machado G, Santos JFL, Weibel DE. Eco-friendly Synthesis of Silver Nanoparticles and its Application in Hydrogen Photogeneration and Nanoplasmonic Biosensing. Chemphyschem 2023; 24:e202300002. [PMID: 37535823 DOI: 10.1002/cphc.202300002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 07/31/2023] [Accepted: 08/02/2023] [Indexed: 08/05/2023]
Abstract
Environmentally friendly methods for silver nanoparticles (AgNPs) synthesis without the use of hazardous chemicals have recently drawn attention. In this work, AgNPs have been synthesized by microwave irradiation using only honey solutions or aqueous fresh pink radish extracts. The concentrations of honey, radish extract, AgNO3 and pH were varied. AgNPs presented mean sizes between 7.0 and 12.8 nm and were stable up to 120 days. The AgNPs were employed as co-catalyst (TiO2 @AgNPs) to increase the hydrogen photogeneration under UV-vis and only visible light irradiation, when compared to pristine TiO2 NPs. The prepared photocatalyst also showed hydrogen generation under visible light. Additionally, AgNPs were used to assemble a nanoplasmonic biosensor for the biodetection of extremely low concentrations of streptavidin, owing to its specific binding to biotin. It is shown here that green AgNPs are versatile nanomaterials, thus being potential candidates for hydrogen photogeneration and biosensing applications.
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Affiliation(s)
- Guilherme B Strapasson
- Institute of Chemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves 9500, P.O.Box 15003, 91501-970, Porto Alegre, RS, Brazil
| | - Eduarda de C Flach
- Institute of Chemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves 9500, P.O.Box 15003, 91501-970, Porto Alegre, RS, Brazil
| | - Marcelo Assis
- Department of Analytical and Physical Chemistry, University Jaume I (UJI), Castelló, 12071, Spain
| | - Silma A Corrêa
- Institute of Chemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves 9500, P.O.Box 15003, 91501-970, Porto Alegre, RS, Brazil
| | - Elson Longo
- CDMF, Federal University of Sao Carlos - UFSCar, P.O. Box 676, 13565e905, São Carlos, São Paulo, Brazil
| | - Giovanna Machado
- Centro de Tecnologias Estratégicas do Nordeste (CETENE), Av. Prof. Luís Freire, n° 01 - CidadeUniversitária, Recife/PE, 50.740-545, Brazil
- Current Adress: Institute of Chemistry, University of Campinas, UNICAMP, Campinas, 13083-970, São Paulo, Brazil
| | - Jacqueline F L Santos
- Institute of Chemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves 9500, P.O.Box 15003, 91501-970, Porto Alegre, RS, Brazil
| | - Daniel E Weibel
- Institute of Chemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves 9500, P.O.Box 15003, 91501-970, Porto Alegre, RS, Brazil
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Skiba M, Vorobyova V. Evaluation of antibacterial, antioxidant, photocatalytic activities of silver-decorated TiO2 comparison green and classic capping agent. APPLIED NANOSCIENCE 2023. [DOI: 10.1007/s13204-022-02748-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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A Recent Study on Remediation of Direct Blue 15 Dye Using Halloysite Nanotubes. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11178196] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A set of lab-scale experiments were designed and conducted to remedy Direct Blue 15 (DB15) dye using nontoxic halloysite nanotubes (HNT) with the view to be utilized in a textile industrial effluent (TIE). The DB15 adsorbed-HNT “sludge” was used as a reinforcing agent and plastic waste to fabricate the composite. To advance the knowledge and further understand the chemical phenomena associated with DB15 adsorption on HNT, different factors like pH value, adsorbate initial concentration, adsorbent dosage, and temperature on the composite were affected experimentally tested. To estimate the adsorption capacity of HNT, nine isotherm models were applied, and it was identified that the Brouers–Sotolongo adsorption isotherm model represented the best accuracy for predicting the adsorption behavior of the HNT. Likewise, the pseudo-second-order reaction was the predominant mechanism for the overall rate of the multi-step dye adsorption process. Additionally, it was demonstrated that the mass transfer during the process is diffusion-controlled, and thermodynamic assessments showed that the process is physisorption.
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