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Your search keyword '"T. Thu-Trang Ho"' showing total 3 results
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3 results on '"T. Thu-Trang Ho"'

1. Silver nanoparticles loaded on lactose/alginate: in situ synthesis, catalytic degradation, and pH-dependent antibacterial activity

Author

Nguyen Thi Thanh Tu, T. Lan-Anh Vo, T. Thu-Trang Ho, Kim-Phuong T. Dang, Van-Dung Le, Phan Nhat Minh, Chi-Hien Dang, Vinh-Thien Tran, Van-Su Dang, Tran Thi Kim Chi, Hieu Vu-Quang, Radek Fajgar, Thi-Lan-Huong Nguyen, Van-Dat Doan, and Thanh-Danh Nguyen

Subjects
alginate, bacterial activity, catalysis, lactose, silver nanoparticles, synthesis, Technology, Chemical technology, TP1-1185, Science, Physics, QC1-999
Abstract

We present the in situ synthesis of silver nanoparticles (AgNPs) through ionotropic gelation utilizing the biodegradable saccharides lactose (Lac) and alginate (Alg). The lactose reduced silver ions to form AgNPs. The crystallite structure of the nanocomposite AgNPs@Lac/Alg, with a mean size of 4–6 nm, was confirmed by analytical techniques. The nanocomposite exhibited high catalytic performance in degrading the pollutants methyl orange and rhodamine B. The antibacterial activity of the nanocomposite is pH-dependent, related to the alterations in surface properties of the nanocomposite at different pH values. At pH 6, the nanocomposite demonstrated the highest antibacterial activity. These findings suggest that this nanocomposite has the potential to be tailored for specific applications in environmental and medicinal treatments, making it a highly promising material.

Published
2023
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3. In situ synthesis of gold nanoparticles on novel nanocomposite lactose/alginate: Recyclable catalysis and colorimetric detection of Fe(III)

Author

Thanh-Danh Nguyen, T. Kim-Dung Hoang, T. Thu-Trang Ho, T. Kim-Chi Huynh, and Chi-Hien Dang

Subjects
Polymers and Plastics, Alginates, Surface Properties, Metal Nanoparticles, Lactose, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Ferric Compounds, Catalysis, Nanocomposites, Rhodamine, chemistry.chemical_compound, Limit of Detection, Spectroscopy, Fourier Transform Infrared, Materials Chemistry, Methyl orange, Fourier transform infrared spectroscopy, Particle Size, Coloring Agents, Nanocomposite, Organic Chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Microscopy, Electron, Biodegradation, Environmental, chemistry, Colloidal gold, Reagent, Colorimetry, Gold, 0210 nano-technology, Dispersion (chemistry), Water Pollutants, Chemical, Nuclear chemistry
Abstract

This work presents a simply new method for in situ synthesis of gold nanoparticles (AuNPs) using the biodegradable polysaccharides. A novel composite of lactose/alginate (Lac/Alg) could be prepared easily through ionotropic gelation mechanism which can reduce in situ gold ions into AuNPs. Lactose plays a crucial role as a reducing reagent which are demonstrated by FTIR analysis. The crystalline structure of AuNPs with a mean size of 10 nm has been confirmed by analysis techniques. The nanocomposite powder possesses highly catalytic performance for degradation of contaminants including 4-nitrophenol, methyl orange, rhodamine 6 G and rhodamine B. The dispersion solution of AuNPs@Lac/Alg was used as an effective probe for highly selective detection of Fe3+ ions. The detection mechanism replies on the aggregation of nanocomposite in the presence of Fe3+ ions. LOD value was found to be 0.8 μM in a linear range of 2.0–80.0 μM.

Published
2020

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