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Facile synthesis of Ti3C2Tx@gold nanoparticle-arginine and serine-functionalized graphene quantum dot aerogel for electrochemical detection of chloramphenicol.
- Source :
- New Journal of Chemistry; 10/28/2023, Vol. 47 Issue 40, p18547-18554, 8p
- Publication Year :
- 2023
-
Abstract
- Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript> has been extensively used as a promising sensing material for the construction of electrochemical sensors because of its excellent conductivity, surface area and mechanical properties, but the two-dimensional structure and poor catalytic activity of Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript> limit the improvement of its analytical behavior. This paper reports a facile method for the synthesis of a Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript>@gold nanoparticle-arginine- and serine-functionalized graphene quantum dot aerogel (Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript>@Au–AS-GQD). AS-GQD was prepared by heating a mixture of citric acid, arginine and serine. The formed AS-GQD was used to reduce chloroauric acid to produce gold nanoparticles. The gold nanoparticles protonated with hydrochloric acid were dropped into a Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript> aqueous solution to form Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript>@Au–AS-GQD. The Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript>@Au–AS-GQD shows one three-dimensional structure. Small gold nanoparticles were uniformly dispersed on the Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript> sheets. The introduction of AS-GQD resulted in the formation of Schottky heterojunction and enhanced the catalytic activity. The electrochemical sensor fabricated with Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript>@Au–AS-GQD exhibited high sensitivity, selectivity and repeatability in the electrochemical detection of chloramphenicol. The differential pulse voltammetric current at −0.6 V linearly increased with the increase in chloramphenicol within 0.003–100 μM, exhibiting a detection limit of 0.0012 μM (S/N = 3). The sensitivity of our sensor toward chloramphenicol was better than those of other electrochemical sensors. This study also paves an avenue for the construction of Ti<subscript>3</subscript>C<subscript>2</subscript>T<subscript>x</subscript> composites with excellent catalytic activity in sensing, catalysis and energy storage and conversion. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 47
- Issue :
- 40
- Database :
- Complementary Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 173011282
- Full Text :
- https://doi.org/10.1039/d3nj03319h