Sensitive detection of 4-nitrophenol based on pyridine diketopyrrolopyrrole-functionalized graphene oxide direct electrochemical sensor

Abstract

For highly sensitive detection of 4-nitrophenol (4-NP) in the environment, a novel pyridine diketopyrrolopyrrole-functionalized graphene oxide (PDPP–GO) composite was constructed for the first time by an improved Hummers' method.

Plasmonic coupling of silver nanospheres loaded on cobalt–iron layered double hydroxides: a robust SERS probe for 4-nitrophenol detection

“…Various analytical techniques have been used to determine 4-NP, including electrochemical sensors, 15 surface enhanced Raman spectroscopy (SERS), 16 high-performance liquid chromatography, 17 mass spectrometry, 18 surface plasmon resonance, 19 capillary electrophoresis, 20 ultraviolet-visible spectrophotometry, 21 fluorescence spectrometry, 22 and indirect enzymatic immunosorbent assay. 23 Among them, SERS has emerged as a powerful nanophotonic technology to detect the spectral signals of analytes even at the single-molecular level owing to its high sensitivity, unique fingerprint characteristics, high accuracy, non-destructiveness, excellent repeatability, rapid acquisition, and multiplexed detection ability.…”

A diazonium-functionalized silver electrode for the sensitive amperometric detection of p-nitrophenol in water over a wide range of concentrations

“…33 Using a graphene oxide sensor functionalized with pyridine diketopyrrolopyrrole, Jia et al have also obtained two different linear ranges depending on the concentration of pNP: lower or higher than 50 μM. 34 The origin of this problem has remained unclear, but some authors have associated it with the adsorption of pNP or one of its derivatives on the electrode surface. For example, Su et al have claimed that this phenomenon is related to the decrease in active sites at high concentrations due to a different adsorption/diffusion ratio.…”