Aggregation and stabilization of multiwalled carbon nanotubes in aqueous suspensions: influences of carboxymethyl cellulose, starch and humic acid

RSC Advances ◽  
2016 ◽  
Vol 6 (71) ◽  
pp. 67260-67270 ◽  
Author(s):  
Wen Liu ◽  
Xiao Zhao ◽  
Zhengqing Cai ◽  
Bing Han ◽  
Dongye Zhao

Aggregation and stability of multiwalled carbon nanotubes in aqueous solutions were investigated with two polysaccharide stabilizers (carboxymethyl cellulose and a water soluble starch) and a natural organic matter (leonardite humic acid).

2019 ◽  
Vol 53 (11) ◽  
pp. 6255-6263 ◽  
Author(s):  
Rodolfo Cruz-Silva ◽  
Yoshihiro Takizawa ◽  
Auppatham Nakaruk ◽  
Michio Katouda ◽  
Ayaka Yamanaka ◽  
...  

2009 ◽  
Vol 43 (23) ◽  
pp. 8979-8984 ◽  
Author(s):  
Ki-Tae Kim ◽  
Aaron J. Edgington ◽  
Stephen J. Klaine ◽  
Jae-Weon Cho ◽  
Sang D. Kim

2020 ◽  
Vol 9 ◽  
pp. 100058
Author(s):  
Céline Jacquin ◽  
Diya Yu ◽  
Michael Sander ◽  
Kamila W. Domagala ◽  
Jacqueline Traber ◽  
...  

2010 ◽  
Vol 29 (11) ◽  
pp. 2511-2518 ◽  
Author(s):  
Aaron J. Edgington ◽  
Aaron P. Roberts ◽  
Leigh M. Taylor ◽  
Matt M. Alloy ◽  
Jason Reppert ◽  
...  

2020 ◽  
Vol 16 (7) ◽  
pp. 905-913
Author(s):  
Youyuan Peng ◽  
Qingshan Miao

Background: L-Ascorbic acid (AA) is a kind of water soluble vitamin, which is mainly present in fruits, vegetables and biological fluids. As a low cost antioxidant and effective scavenger of free radicals, AA may help to prevent diseases such as cancer and Parkinson’s disease. Owing to its role in the biological metabolism, AA has also been utilized for the therapy of mental illness, common cold and for improving the immunity. Therefore, it is very necessary and urgent to develop a simple, rapid and selective strategy for the detection of AA in various samples. Methods: The molecularly imprinted poly(o-phenylenediamine) (PoPD) film was prepared for the analysis of L-ascorbic acid (AA) on gold nanoparticles (AuNPs) - multiwalled carbon nanotubes (MWCNTs) modified glass carbon electrode (GCE) by electropolymerization of o-phenylenediamine (oPD) and AA. Experimental parameters including pH value of running buffer and scan rates were optimized. Scanning electron microscope (SEM), fourier-transform infrared (FTIR) spectra, cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were utilized for the characterization of the imprinted polymer film. Results: Under the selected experimental conditions, the DPV peak currents of AA exhibit two distinct linear responses ranging from 0.01 to 2 μmol L-1 and 2 to 100 μmol L-1 towards the concentrations of AA, and the detection limit was 2 nmol L-1 (S/N=3). Conclusion: The proposed electrochemical sensor possesses excellent selectivity for AA, along with good reproducibility and stability. The results obtained from the analysis of AA in real samples demonstrated the applicability of the proposed sensor to practical analysis.


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