Ex-situ and in-situ post-photosynthesis of silver nanoparticles on polyamide fabric using daylight irradiation

Silver nanoparticles (AgNPs) have been ex-situ post-synthesized in an aqueous solution and in-situ synthesized on polyamide fabric through a simple chemical reduction method by using silver nitrate (AgNO3), stannous chloride (SnCl2) and cetyltrimethylammonium bromide (CTAB) under daylight irradiation. SnCl2 and CTAB act as reducing and stabilizing agents in the colloidal silver nanoparticles solution respectively. Post in-situ synthesis of Ag NPs have been carried out on polyamide fabric by spraying solution of AgNO3, CTAB and SnCl2 on the fabric and then irradiating under daylight for 2 h. Ag NPs solutions and Ag NPs loaded polyamide fabrics are characterized by UV-vis spectroscopy, dynamic light scattering (DLS), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Appearing a strong plasmon resonance peak at 400 nm in UV-visible spectrum, XRD patterns and SEM images are found to clearly confirm the formation of silver nanoparticles. The UV-vis spectra also confirm no Ag NPs formation without daylight irradiation

Simultaneous in situ synthesis of nanosilver and dyeing of polyamide 6 fabric

In this research, in situ synthesis of silver nanoparticles (Ag NPs) has been established in an aqueous solution alongwith the dyeing of polyamide 6 fabric through a simple chemical reduction method by using silver nitrate (AgNO3),stannous chloride (SnCl2) and cetyltrimethylammonium bromide (CTAB). SnCl2 is used as a reducing agent in synthesis ofAg NPs and also as mordant in the dyeing of polyamide 6 fabric. The formation and distribution of Ag NPs on surface of thefabric are characterized by X-ray diffraction, scanning electron microscope and energy dispersive X-ray. The SEM imagesindicate the covering of fabric surface with Ag NPs. Loading of Ag NPs on the fabric surface leads to higher color strengthand change in colour. The presence of stannous and silver ions also leads to change in the reflectance behaviour of the dyedfabrics. CTAB has antibacterial properties and shows stabilizing effects in synthesis of Ag NPs, which further showssynergistic effect in antibacterial activities of Ag NPs loaded fabrics

<i><span style="font-size:15.0pt;mso-bidi-font-size: 16.0pt;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:Mangal;mso-ansi-language:EN-GB;mso-fareast-language:EN-US; mso-bidi-language:HI;mso-bidi-font-weight:bold" lang="EN-GB">Ex-situ</span></i><span style="font-size:15.0pt;mso-bidi-font-size:16.0pt;font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:Mangal; mso-ansi-language:EN-GB;mso-fareast-language:EN-US;mso-bidi-language:HI; mso-bidi-font-weight:bold;mso-bidi-font-style:italic" lang="EN-GB"> <span style="font-size:15.0pt;mso-bidi-font-size:16.0pt;font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:Mangal; mso-ansi-language:EN-GB;mso-fareast-language:EN-US;mso-bidi-language:HI; mso-bidi-font-weight:bold" lang="EN-GB">and <i>in-situ</i> post-photosynthesis of silver nanoparticles on polyamide fabric using daylight irradiation</span></span>

55-61Silver nanoparticles (AgNPs) have been ex-situ post-synthesized in an aqueous solution and in-situ synthesized on polyamide fabric through a simple chemical reduction method by using silver nitrate (AgNO3), stannous chloride (SnCl2) and cetyltrimethylammonium bromide (CTAB) under daylight irradiation. SnCl2 and CTAB act as reducing and stabilizing agents in the colloidal silver nanoparticles solution respectively. Post in-situ synthesis of Ag NPs have been carried out on polyamide fabric by spraying solution of AgNO3, CTAB and SnCl2 on the fabric and then irradiating under daylight for 2 h. Ag NPs solutions and Ag NPs loaded polyamide fabrics are characterized by UV-vis spectroscopy, dynamic light scattering (DLS), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Appearing a strong plasmon resonance peak at 400 nm in UV-visible spectrum, XRD patterns and SEM images are found to clearly confirm the formation of silver nanoparticles. The UV-vis spectra also confirm no Ag NPs formation without daylight irradiation

Simultaneous <em>in situ</em> synthesis of nanosilver and dyeing of polyamide 6 fabric

488-494In this research, in situ synthesis of silver nanoparticles (Ag NPs) has been established in an aqueous solution along with the dyeing of polyamide 6 fabric through a simple chemical reduction method by using silver nitrate (AgNO3), stannous chloride (SnCl2) and cetyltrimethylammonium bromide (CTAB). SnCl2 is used as a reducing agent in synthesis of Ag NPs and also as mordant in the dyeing of polyamide 6 fabric. The formation and distribution of Ag NPs on surface of the fabric are characterized by X-ray diffraction, scanning electron microscope and energy dispersive X-ray. The SEM images indicate the covering of fabric surface with Ag NPs. Loading of Ag NPs on the fabric surface leads to higher color strength and change in colour. The presence of stannous and silver ions also leads to change in the reflectance behaviour of the dyed fabrics. CTAB has antibacterial properties and shows stabilizing effects in synthesis of Ag NPs, which further shows synergistic effect in antibacterial activities of Ag NPs loaded fabrics

Designing 3D Ternary Hybrid Composites Composed of Graphene, Biochar and Manganese Dioxide as High-Performance Supercapacitor Electrodes

Biochar derived from waste biomass has proven to be an encouraging novel electrode material in supercapacitors. In this work, luffa sponge-derived activated carbon with a special structure is produced through carbonization and KOH activation. The reduced graphene oxide (rGO) and manganese dioxide (MnO2) are in-situ synthesized on luffa-activated carbon (LAC) to improve the supercapacitive behavior. The structure and morphology of LAC, LAC-rGO and LAC-rGO-MnO2 are characterized by the employment of X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), BET analysis, Raman spectroscopy and scanning electron microscopy (SEM). The electrochemical performance of electrodes is performed in two and three-electrode systems. In the asymmetrical two-electrode system, the LAC-rGO-MnO2//Co3O4-rGO device shows high specific capacitance (SC), high-rate capability and excellent cycle reversibly in a wide potential window of 0–1.8 V. The maximum specific capacitance (SC) of the asymmetric device is 586 F g−1 at a scan rate of 2 mV s−1. More importantly, the LAC-rGO-MnO2//Co3O4-rGO device exhibits a specific energy of 31.4 W h kg−1 at a specific power of 400 W kg−1. Overall, the synergistic effect between the ternary structures of microporous LAC, rGO sheets and MnO2 nanoparticles leads to the introduction of high-performance hierarchical supercapacitor electrodes

Comparison of atherogenic indices for predicting the risk of metabolic syndrome in Southwest Iran: results from the Hoveyzeh Cohort Study (HCS)

Abstract Background Metabolic syndrome (MetS) is a cluster of risk factors related to diabetes and cardiovascular disease (CVD). Given that early identification of MetS might decrease CVD risk, it is imperative to establish a simple and cost-effective method to identify individuals at risk of MetS. The purpose of this study was to explore the relationships between several atherogenic indices (including AIP, TyG index, non-HDL-C, LDL-c/HDL-c, and TC/HDL-c) and MetS, and to assess the ability of these indices to predict MetS. Methods The present cross-sectional study was conducted using baseline data from 9809 participants of the Hoveyzeh Cohort Study (HCS). MetS was defined based on the International Diabetes Federation (IDF). To examine the discriminatory abilities of each atherogenic indices in the identification of MetS, a receiver-operating characteristic curve was conducted. Logistic regression analysis was also performed to evaluate the relationship between atherogenic indices and MetS. Results All of the atherogenic indices including the TyG index, AIP, non-HDL-C, TC/HDL-c, and LDL-c/HDL-c were significantly higher in participants with MetS than in those without MetS. According to the ROC curve analysis, the TyG index revealed the highest area under the curve (0.79 and 0.85 in men and women, respectively), followed by the AIP (0.76 and 0.83 in men and women, respectively). The best cutoff values for the TyG index and AIP were 8.96 and 0.16 for men and 8.84 and 0.05 for women, respectively. The TyG index and AIP were also strongly associated with MetS. Conclusion Among the 5 atherogenic indices evaluated, the TyG index and AIP were strongly related to MetS. The TyG index also demonstrated superior discriminative ability compared to other atherogenic indices in predicting MetS