4.6 Article

Pillar[6]arene-modified gold nanoparticles grafted on cellulose nanocrystals for the electrochemical detection of bisphenol A

期刊

NEW JOURNAL OF CHEMISTRY
卷 45, 期 31, 页码 14126-14133

出版社

ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nj02040d

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资金

  1. Agriculture Joint Research Program of Yunnan Province [2018FG001-006]
  2. Yunnan Applied Basic Research Excellent Youth Project [202001AW070017]
  3. National Natural Science Foundation of China [21864024, 32071688, 32060323]
  4. National Post-Doctoral Innovative Talent Support Program of China [BX20190291]
  5. Program for Leading Talents, Department of Science and Technology of Yunnan Province [2017HA013]
  6. Natural Science Foundation of Chongqing [cstc2020jcyjmsxmX0341]

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In this study, a CP6-AuNP-functionalized CNC nanohybrid with high electrocatalytic activity and excellent selective molecular recognition capability for BPA detection was prepared. The host-guest interactions were studied through fluorescence titration experiments, revealing a high binding constant between CP6 and BPA. The electrochemical sensing method showed satisfactory results for detecting BPA in tap water and milk samples.
In this study, a macrocyclic cationic pillar[6]arene (CP6)-modified gold nanoparticle (CP6-AuNP)-functionalized cellulose nanocrystal (CNC) nanohybrid is prepared. The obtained CNC@CP6-AuNP nanohybrid exhibits high electrocatalytic activity and excellent selective molecular recognition capability towards the electrochemical determination of bisphenol A (BPA). The electrode, operated at a working potential of 0.3 to 0.9 V, works in the concentration range of 0.05-100 and 100-500 mu M BPA and has a 12 nM detection limit. The host-guest interactions are studied via fluorescence titration experiments, indicating more affinity and a high binding constant (K-a) of 4.29 x 10(4) M-1 by electrostatic interactions and hydrophobic interactions between CP6 and BPA. The electrochemical sensing has also been used to detect BPA in tap water and milk samples with satisfactory results. Finally, this study can provide a novel method for the design of a macrocycle host-modified metal nanoparticle-functionalized hybrid material for catalysis, sensing, materials science and other fields.

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