Atul Kapoor, Nilojyoti Sahoo, Saurabh K. Rajput, Pralok K. Samanta and V. Suresh Mothika*,
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引用次数: 0
Abstract
Functional conjugated microporous polymers (CMPs) were studied for chemical sensing and photocatalytic application. However, CMPs showing dual functional properties of electrochemical sensing and photocatalytic activity are rare yet unique and are associated with the choice of building blocks. Herein, we demonstrate a dual-function conjugated microporous polymer, pTPETTz (SBET = 331.8 m2 g–1) and lpTPETTz (SBET = 11.4 m2 g–1), based on conducting and photo functional thiazolothiazole (TTz) units for selective detection of metronidazole (MNZ) and photocatalytic degradation of micropollutants. pTPETTz-modified electrodes (glassy carbon and screen-printed electrode) exhibited a selective current response to MNZ among other antibiotics, interfering biomolecules etc. Among them, pTPETTz@GC showed the lowest detection limit (LoD) of 5.74 nM. The pTPETTz@SPE showed similar detection limits as pTPETTz@GC in the urine sample analysis and showed a high recovery percentage. Interestingly, the sensing response of pTPETTz is significantly higher than that of lpTPETTz due to the lower charge transfer resistance (Rct) of pTPETTz (259.84 Ω cm2) compared to lpTPETTz (360.41 Ω cm2) and bare ITO (642.35 Ω cm2) as evidenced by electrochemical impedance spectroscopy (EIS). Apart from this, pTPETTz (Eg = 2.41 eV) and lpTPETTz (Eg = 2.37 eV) also showed efficient photocatalytic degradation (up to 98.21%) of aqueous food colorants under direct sunlight due to the formation of a highly reactive species superoxide anion (O2•–) and photogenerated holes (h+). The degradation follows pseudo-first-order kinetics with a relatively higher rate constant (k = 0.05 min–1).
期刊介绍：
ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers.
The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.
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