scholarly journals Simple and rapid colorimetric sensing of Ni(II) ions in tap water based on aggregation of citrate-stabilized silver nanoparticles

2019 ◽  
Vol 29 (1) ◽  
Author(s):  
Francis Eric P. Almaquer ◽  
John Salvador Y. Ricacho ◽  
Ryan Lee G. Ronquillo
Keyword(s):  
Silver Nanoparticles ◽  
Tap Water ◽  
Colorimetric Sensing ◽  
Water Based

scholarly journals Facile and Green Fabrication of Carrageenan-Silver Nanoparticles for Colorimetric Determination of Cu2+ and S2−

Nanomaterials ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 83 ◽  
Author(s):  
Yesheng Wang ◽  
Xueyi Dong ◽  
Li Zhao ◽  
Yun Xue ◽  
Xihui Zhao ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Lake Water ◽  
Color Change ◽  
Tap Water ◽  
Environmental Water ◽  
Colorimetric Determination ◽  
Capping Agent ◽  
Colorimetric Sensing ◽  
Green Method

In the present work, silver nanoparticles (AgNPs) were prepared by a simple and green method using carrageenan as reducing and capping agent. The as-synthesized carrageenan-AgNPs was demonstrated as an effective duel colorimetric sensing for selective and sensitive recognition of Cu2+ and S2−, which could be used to detect these ions with naked eyes. In addition, the possible sensing mechanism was that Cu2+ ions caused serious aggregation of carrageenan-AgNPs, which led to the color change of carrageenan-AgNPs. AgNPs were etched by S2− forming Ag2S, which played an important role in the determination of S2− ions. Furthermore, it has been successfully applied to the determination of Cu2+ and S2− in tap water and lake water, showing its great potential for the analysis of environmental water samples.

scholarly journals Dual colorimetric sensing of ascorbic acid and thyroxine using Ag–EGCG–CTAB via a DFT approach

RSC Advances ◽  
2021 ◽  
Vol 11 (58) ◽  
pp. 36698-36706
Author(s):  
Nirangkush Borah ◽  
Amlan Jyoti Kalita ◽  
Ankur kanti Guha ◽  
Manash R. Das ◽  
Chandan Tamuly
Keyword(s):  
Silver Nanoparticles ◽  
Ascorbic Acid ◽  
Epigallocatechin Gallate ◽  
Cost Effective ◽  
Colorimetric Sensing

In this work, a colorimetric approach for the detection of ascorbic acid and thyroxine was developed by synthesizing cost-effective silver nanoparticles (AgNPs) decorated with epigallocatechin gallate (EGCG) and CTAB.

scholarly journals The Synthesis and Stability Study of Silver Nanoparticles Prepared by Using p-Aminobenzoic Acid as Reducing and Stabilizing Agent

2018 ◽  
Vol 18 (3) ◽  
pp. 421 ◽  
Author(s):  
Dian Susanthy ◽  
Sri Juari Santosa ◽  
Eko Sri Kunarti
Keyword(s):  
Silver Nanoparticles ◽  
Reaction Time ◽  
Silver Nitrate ◽  
Tap Water ◽  
Nitrate Solution ◽  
Silver Nitrate Solution ◽  
Stability Study ◽  
Synthesis Process ◽  
Aminobenzoic Acid ◽  
Stabilizing Agent

A study to examine the performance of p-aminobenzoic acid as both reducing agent for silver nitrate to silver nanoparticles (AgNPs) and stabilizing agent for the formed AgNPs has been done. The synthesis of AgNPs was performed by mixing silver nitrate solution as precursor with p-aminobenzoic acid solution and heating it in a boiling water bath. After the solution turned to yellow, the reaction stopped by cooling it in tap water. The formed AgNPs were analyzed by using UV-Vis spectrophotometry to evaluate their SPR absorption in wavelength range of 400–500 nm. The synthesis process was highly depend on the pH, reaction time, and mole ratios of the reactants. The synthesis only occur in pH 11 and at reaction time 30 min, the particle size of the formed AgNPs was 12 ± 7 nm. Longer reaction time increased the reducing performance of p-aminobenzoic acid in AgNPs synthesis but decreased its stabilizing performance. The increase of silver nitrate amount relative to p-aminobenzoic acid in the synthesis increased the reducing and stabilizing performance of p-aminobenzoic acid and the optimum mole ratio between AgNO3 and p-aminobenzoic acid was 5:100 (AgNO3 to p-aminobenzoic acid).

Water-based synthesis of gold and silver nanoparticles with cuboidal and spherical shapes using luteolin tetraphosphate at room temperature

2018 ◽  
Vol 5 (4) ◽  
pp. 917-932 ◽  
Author(s):  
Francis J. Osonga ◽  
Phuong Le ◽  
David Luther ◽  
Laura Sakhaee ◽  
Omowunmi A. Sadik
Keyword(s):  
Silver Nanoparticles ◽  
Metal Nanoparticles ◽  
Room Temperature ◽  
Synthetic Methods ◽  
Gold And Silver Nanoparticles ◽  
Water Based

The demand for eco-friendly synthetic methods of metal nanoparticles is on the rise.

A novel and ultrasensitive yellow to taupe brown colorimetric sensing and removal method for Hg(ii) based on the thermosensitive poly(N-isopropyl acrylamide) stabilized silver nanoparticles

2019 ◽  
Vol 43 (40) ◽  
pp. 15879-15885 ◽  
Author(s):  
Chenxue Zhu ◽  
Jie Bian ◽  
Yuxi Li ◽  
Junshen Liu ◽  
Xunyong Liu ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Colorimetric Sensing ◽  
Colorimetric Probe ◽  
Removal Method ◽  
Dual Functional ◽  
Isopropyl Acrylamide ◽  
Removal System

AgNP/PNIPAm was developed as a dual-functional colorimetric probe and removal system for Hg2+.

Picric acid capped silver nanoparticles as a probe for colorimetric sensing of creatinine in human blood and cerebrospinal fluid samples

The Analyst ◽  
2016 ◽  
Vol 141 (4) ◽  
pp. 1488-1498 ◽  
Author(s):  
Ankita K. Parmar ◽  
Nikunj N. Valand ◽  
Kalpesh B. Solanki ◽  
Shobhana K. Menon
Keyword(s):  
Silver Nanoparticles ◽  
Cerebrospinal Fluid ◽  
Human Blood ◽  
Picric Acid ◽  
Colorimetric Sensing ◽  
Ag Nps ◽  
New Approach

A new approach has been proposed for the traditional Jaffe's reaction by coating Ag NPs with picric acid to form an assembly that can selectively detect creatinine. This sensor proficiently and selectively recognizes creatinine due to the ability of picric acid to bind with it and form a complex.

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