Development of a reusable fluorescent nanosensor based on rhodamine B immobilized in Stöber silica for copper ion detection

2021 ◽  
Author(s):  
Rafael da Silva Fernandes ◽  
Ivo M. Raimundo
Keyword(s):  
Aqueous Solution ◽  
Silica Nanoparticles ◽  
Rhodamine B ◽  
Copper Ion ◽  
Ion Detection ◽  
Stöber Method ◽  
Modified Stöber Method

This work has the goal of developing and evaluating a reusable fluorescent nanosensor for detection of Cu(ii) ion in aqueous solution, based on the immobilization of rhodamine B in silica nanoparticles prepared according to a modified Stöber method.

scholarly journals Simultaneous Adsorption and Degradation of Cr(VI) and Cd(II) Ions from Aqueous Solution by Silica-Coated Fe0Nanoparticles

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Yongchao Li ◽  
Hongpu Ma ◽  
Bozhi Ren ◽  
Tielong Li
Keyword(s):  
Aqueous Solution ◽  
Active Site ◽  
Removal Rate ◽  
Core Shell ◽  
Simultaneous Removal ◽  
Stöber Method ◽  
Removal Capacity ◽  
Batch Tests ◽  
One Step ◽  
Modified Stöber Method

Core-shell silica-coated Fe0nanoparticles (Fe@SiO2) were prepared in one-step synthesis by aqueous reduction combined with modified Stöber method. The as-prepared Fe@SiO2were then used for simultaneous removal of Cr(VI) and Cd(II) from aqueous solution. Batch tests indicated that Fe@SiO2exhibited high removal capacity toward Cr(VI) and Cd(II). Cr(VI) was removed by Fe@SiO2through reduction rather than adsorption, while Cd(II) removal was mainly through adsorption. The removal rate increased with increasing initial Fe NPs dose and decreased with increasing initial Cr(VI) and Cd(II) concentrations. Cd(II) adsorption was also strengthened by Cr(VI) reduction with the release of OH−. The removals of Cr(VI) and Cd(II) were weakened in the presence of cations or humic acid, as a result of aggregation and less active site of Fe@SiO2. Overall, the simply prepared Fe@SiO2were potential material for the heavy metals removed from water.

Application of Silica Nanoparticles in the Determination of Herbicides in Environmental Water Samples Using Liquid Chromatography-Mass Spectroscopy

2020 ◽  
Vol 16 (5) ◽  
pp. 748-756
Author(s):  
Mir Waqas Alam ◽  
Tentu Nageswara Rao ◽  
Yarasani Prashanthi ◽  
Vourse Sridhar ◽  
Adil Alshoaibi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Liquid Chromatography ◽  
Silica Nanoparticles ◽  
Solid Phase ◽  
Silica Nanoparticle ◽  
Environmental Water ◽  
Phase Extraction ◽  
Functionalized Nanoparticles ◽  
Supporting Material

Background: Herbicides are very beneficial in the crop yield with the aid of controlling weeds within the agriculture, but several herbicides are chronic in soil. Objective: In this study, nanoparticles and the packages of synthesized novel silica nanoparticles were studied for the preconcentration of herbicides. Methods: These nanoparticles prepared by the Stöber mechanism were purified and functionalized. Nanoparticles thus prepared successfully were used as supporting material for the preconcentration of residues of herbicides in the water. Results: Preconcentration was achieved by preparing the silica-based solid-phase-extraction cartridges. Nanoparticles used for this purpose were within the range of 50-250 nm. An SPE cartridge was prepared by packing 200 mg of silica nanoparticle in the empty cartridge of diameter 5.5 cm and length 0.6 cm in between PTFE frits. Aqueous solutions of 0.1 μg/ml of herbicides were prepared separately, and 10 ml of the solution was passed through the cartridge at the rate of 0.2 ml/min. After passing 10 ml volume of the aqueous solution, residues adsorbed on the cartridge were eluted using 2 ml of acetonitrile. The eluate was injected to determine the herbicide residue adsorbed on the SPE cartridge. Conclusion: In the study, it was found that greater than 90% of the herbicide residues were trapped on silica nanoparticle-based SPE cartridge. An analytical method was developed for the simultaneous determination of these herbicides. The residues were quantified by LC-MS/MS with ESI mode.

scholarly journals Self-Assembled Nanomaterials Based on Complementary Sn(IV) and Zn(II)-Porphyrins, and Their Photocatalytic Degradation for Rhodamine B Dye

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3598
Author(s):  
Nirmal K. Shee ◽  
Hee-Joon Kim
Keyword(s):  
Aqueous Solution ◽  
Visible Light Irradiation ◽  
Rhodamine B ◽  
Self Assembly ◽  
The Self ◽  
Assembly Process ◽  
Absorption Bands ◽  
Ligand Coordination ◽  
Rhodamine B Dye ◽  
Metal Ligand

A series of porphyrin triads (1–6), based on the reaction of trans-dihydroxo-[5,15-bis(3-pyridyl)-10,20-bis(phenyl)porphyrinato]tin(IV) (SnP) with six different phenoxy Zn(II)-porphyrins (ZnLn), was synthesized. The cooperative metal–ligand coordination of 3-pyridyl nitrogens in the SnP with the phenoxy Zn(II)-porphyrins, followed by the self-assembly process, leads to the formation of nanostructures. The red-shifts and remarkable broadening of the absorption bands in the UV–vis spectra for the triads in CHCl3 indicate that nanoaggregates may be produced in the self-assembly process of these triads. The emission intensities of the triads were also significantly reduced due to the aggregation. Microscopic analyses of the nanostructures of the triads reveal differences due to the different substituents on the axial Zn(II)-porphyrin moieties. All these nanomaterials exhibited efficient photocatalytic performances in the degradation of rhodamine B (RhB) dye under visible light irradiation, and the degradation efficiencies of RhB in aqueous solution were observed to be 72~95% within 4 h. In addition, the efficiency of the catalyst was not impaired, showing excellent recyclability even after being applied for the degradation of RhB in up to five cycles.

scholarly journals Adsorptive removal of Rhodamine B dye from aqueous solution by using graphene–based nickel nanocomposite

Heliyon ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. e06851
Author(s):  
Usha Jinendra ◽  
Dinesh Bilehal ◽  
B.M. Nagabhushana ◽  
Avvaru Praveen Kumar
Keyword(s):  
Aqueous Solution ◽  
Rhodamine B ◽  
Adsorptive Removal ◽  
Rhodamine B Dye

A colorimetric chemosensor for the sequential detection of copper ion and amino acids (cysteine and histidine) in aqueous solution

RSC Advances ◽  
2015 ◽  
Vol 5 (39) ◽  
pp. 31179-31188 ◽  
Author(s):  
Yong Sung Kim ◽  
Gyeong Jin Park ◽  
Seul Ah Lee ◽  
Cheal Kim
Keyword(s):  
Aqueous Solution ◽  
Amino Acids ◽  
Copper Ion ◽  
Sequential Detection ◽  
Colorimetric Chemosensor

A simple and selective colorimetric chemosensor was reported for the sequential detection of Cu2+, cysteine and histidine.

scholarly journals Adsorption of Copper Ion in Acidic Aqueous Solution Using Rice Bran and Heat Treatment

2008 ◽  
Vol 31 (12) ◽  
pp. 749-754
Author(s):  
Kazuhiro HONDA ◽  
Takayuki YOSHIKAWA ◽  
Tuyoshi SASAKI ◽  
Tadashi SASAMOTO
Keyword(s):  
Heat Treatment ◽  
Aqueous Solution ◽  
Rice Bran ◽  
Copper Ion ◽  
Acidic Aqueous Solution

Electrolytic removal of Rhodamine B from aqueous solution by peroxicoagulation process

2014 ◽  
Vol 21 (14) ◽  
pp. 8585-8594 ◽  
Author(s):  
Puthiya Veetil Nidheesh ◽  
Rajan Gandhimathi
Keyword(s):  
Aqueous Solution ◽  
Rhodamine B

UV/H2O2 treatment of Rhodamine B in aqueous solution: Influence of operational parameters and kinetic modeling

Desalination ◽  
2008 ◽  
Vol 230 (1-3) ◽  
pp. 16-26 ◽  
Author(s):  
N. Daneshvar ◽  
M.A. Behnajady ◽  
M. Khayyat Ali Mohammadi ◽  
M.S. Seyed Dorraji
Keyword(s):  
Aqueous Solution ◽  
Kinetic Modeling ◽  
Rhodamine B ◽  
Operational Parameters ◽  
H2o2 Treatment
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