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

Research output: Contribution to journalArticle

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
JournalJournal of Materials Chemistry C
Volume7
Issue number28
Early online date13 May 2019
DOIs
Publication statusE-pub ahead of print - 13 May 2019

Fingerprint

Cyanides
Assays
Bearings (structural)
Nanoparticles
Degradation
Catalysts
Benzoic Acid
Functional materials
Benzoic acid
Aniline
Phenol
Sulfates
Phenols
Amines
Acids
Electrons
Water
ferric ferrocyanide
1,5-naphthalenedisulfonic acid
4-nitrophenol

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