Tunable Dual-Thermoresponsive Phase Behavior of Zwitterionic Polysulfobetaine Copolymers Containing Poly(N,N -dimethylaminoethyl methacrylate)-Grafted Silica Nanoparticles in Aqueous Solution

2013 ◽  
Vol 215 (1) ◽  
pp. 111-120 ◽  
Author(s):  
Zhixin Dong ◽  
Jun Mao ◽  
Dapeng Wang ◽  
Muquan Yang ◽  
Weicai Wang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Phase Behavior ◽  
Silica Nanoparticles ◽  
Dimethylaminoethyl Methacrylate

pH-modulated double LCST behaviors with diverse aggregation processes of random-copolymer grafted silica nanoparticles in aqueous solution

RSC Advances ◽  
2015 ◽  
Vol 5 (105) ◽  
pp. 86584-86592 ◽  
Author(s):  
Xiaolu Chen ◽  
Hui Sun ◽  
Jian Xu ◽  
Xia Han ◽  
Honglai Liu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Silica Nanoparticles ◽  
Random Copolymer ◽  
Hybrid Nanoparticles ◽  
One Pot ◽  
Dimethylaminoethyl Methacrylate ◽  
Aggregation Processes ◽  
Silica Core

Thermo-responsive hybrid nanoparticles composed of silica-core and poly(N,N-dimethylaminoethyl methacrylate-co-N-isopropylacrylamide) P(DMAEMA-co-NIPAM) copolymer-shell were prepared through a one-pot ATRP technique.

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.

Effects of Alcohols and Counterions on the Phase Behavior of 1-Octyl-3-methylimidazolium Chloride Aqueous Solution

2007 ◽  
Vol 111 (40) ◽  
pp. 11708-11713 ◽  
Author(s):  
Guodong Zhang ◽  
Xiao Chen ◽  
Yurong Zhao ◽  
Yizhou Xie ◽  
Huayu Qiu
Keyword(s):  
Aqueous Solution ◽  
Phase Behavior

scholarly journals Determination of berberine hydrochloride using a fluorimetric method with silica nanoparticles as a probe

RSC Advances ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 6075-6082 ◽  
Author(s):  
Qing Liu ◽  
Zhihai Xie ◽  
Tao Liu ◽  
Jin Fan
Keyword(s):  
Aqueous Solution ◽  
Silica Nanoparticles ◽  
Berberine Hydrochloride ◽  
Fluorimetric Method ◽  
Spectrofluorimetric Method

A simple, green and sensitive spectrofluorimetric method was proposed for the determination of berberine hydrochloride (BRH) in aqueous solution.

Functionalized Magnetic Silica Nanoparticles for Highly Efficient Adsorption of Sm3+ from a Dilute Aqueous Solution

Langmuir ◽  
2018 ◽  
Vol 34 (8) ◽  
pp. 2674-2684 ◽  
Author(s):  
Yue Wang ◽  
Hari Katepalli ◽  
Tonghan Gu ◽  
T. Alan Hatton ◽  
Yundong Wang
Keyword(s):  
Aqueous Solution ◽  
Silica Nanoparticles ◽  
Highly Efficient ◽  
Dilute Aqueous Solution ◽  
Magnetic Silica ◽  
Magnetic Silica Nanoparticles

scholarly journals Anisotropic Interactions in Protein Mixtures: Self Assembly and Phase Behavior in Aqueous Solution

2012 ◽  
Vol 3 (6) ◽  
pp. 731-734 ◽  
Author(s):  
Anıl Kurut ◽  
Björn A. Persson ◽  
Torbjörn Åkesson ◽  
Jan Forsman ◽  
Mikael Lund
Keyword(s):  
Aqueous Solution ◽  
Phase Behavior ◽  
Self Assembly ◽  
Anisotropic Interactions
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