• LING WANG

Articles written in Bulletin of Materials Science

• Electrochemical sensor based on Na$^+$-doped g-C$_3$N$_4$ for detection of phenol

In this work, a novel and enhanced electrochemical sensor based on Na$^+$-doped g-C$_3$N$_4$ was constructed for the detection of phenol. First, the g-C$_3$N$_4$ was formed through polymerizing melamine under 520$^{\circ}$C. And then the Na$^+$-doped g-C$_3$N$_4$ was fabricated by a simple wet chemical method. The electrochemical sensor was constructed by modifying the carbon paper with the resulting Na$^+$-doped g-C$_3$N$_4$. The morphology, chemical compositions and structure of Na$^+$-dopedg-C$_3$N$_4$ were characterized by scanning electron microscopy, transmission electronic microscopy, energy-dispersive X-ray detector and X-ray diffraction. The Na$^+$-doped g-C$_3$N$_4$ electrode was used for the cyclic voltammetry and amperometric response detection of phenol in a 0.1 M phosphate buffer (pH 9.0). Under the optimal conditions, the prepared sensordisplayed good performance for the electrochemical detection of phenol with a wide linear range of 1–110 $\mu$M, as well as low detection limit of 0.23 $\mu$M.

• Construction of MOFs-based AgI/Ag/Cu$_3$(BTC)$_2$ ternary composites as Z-scheme photocatalysts for effective degradation of tetracycline

Ternary Z-scheme photocatalysts were constructed using metal-organic frameworks-based AgI/Ag/Cu$_3$(BTC)$_2$ composites via a facile procedure. The morphology, structure, chemical composition, optical and photo-electrochemical properties of the photocatalysts were analyzed by scanning electron microscopy (SEM), X-ray diffraction(XRD), X-ray photoelectron spectroscopy (XPS) and UV–vis diffuse reflectance (DRS) spectroscopy. The photocatalytic tetracycline (TC) degradation demonstrated that all the AgI/Ag/Cu$_3$(BTC)$_2$ photocatalysts have higher photocatalytic activity than that of pure Cu$_3$(BTC)$_2$ and 20% AgI/Ag/Cu$_3$(BTC)$_2$ has the highest TC degradation efficiency. Moreover,20% AgI/Ag/Cu$_3$(BTC)$_2$ also has greatly enhanced photocatalytic activities with TC degradation rate 3.41 times and 4.42times higher than that of AgI/Cu-BTC and Cu-BTC, respectively. A possible indirect Z-scheme mechanism was alsoproposed according to the trapping experiment and band structures of the photocatalyst. The improved photocatalytic activity of the composite can be attributed to the incorporation of Ag and its Z-scheme structures.

• # Bulletin of Materials Science

Volume 44, 2021
All articles
Continuous Article Publishing mode

• # Dr Shanti Swarup Bhatnagar for Science and Technology

Posted on October 12, 2020

Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020