Indicator/catalyst displacement assay: Design of a latent catalyst for the selective detection and degradation of cyanide by Prussian blue analog-modified TiO₂ nanoparticles

Chang SHEN, Anxun ZHENG, Min HUANG, Qian TANG, Chengbin GONG, Cheuk Fai Stephen CHOW

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Abstract

Prussian blue bimetallic analog (PBA)-modified TiO₂ particles (NP1–3) were explored as a new generation of latent catalytic materials for the simultaneous detection and removal of cyanide using the indicator/catalytic displacement approach (ICDA). These PBAs not only act as the ‘colored coats’ but also quench the oxidative degradation properties of TiO₂ by facilitating the recombination of its electrons and holes. The obtained results revealed that among common organic/inorganic pollutants (e.g., cyanide, aniline, 1,5-naphthalenedisulfonic acid, benzoic acid, and 4-nitrophenol), only CN⁻ could selectively induce a colorimetric response and the photocatalytic oxidative degradation of TiO₂, while analytes bearing amine, sulfate, carboxylate, and phenol functionalities did not induce any response. These functional materials were also found to be applicable in real water bodies. Copyright © 2019 Royal Society of Chemistry.
Original languageEnglish
Pages (from-to)8585-8592
JournalJournal of Materials Chemistry C
Volume7
Issue number28
Early online date13 May 2019
DOIs
Publication statusPublished - 28 Jul 2019

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Citation

Shen, C., Zheng, A., Huang, M., Tang, Q., Gong, C.-B., & Chow, C.-F. (2019). Indicator/catalyst displacement assay: Design of a latent catalyst for the selective detection and degradation of cyanide by Prussian blue analog-modified TiO₂ nanoparticles. Journal of Materials Chemistry C, 7(28), 8585-8592. doi: 10.1039/C9TC00368A