Potassium Ferrate(VI) as a Highly Efficient and Environmentally Friendly Chemiluminescence Reagent in Acidic Solution

Abstract

Herein we report that the reactions of potassium ferrate (VI) with a number of reductants can produce strong chemiluminescence (CL) in acidic aqueous solution. The CL Spectra were registered and compared with the classical KMnO4 and NaClO-H2O2 CL systems. The characteristic emission peaks at 1268 and 1050 nm were observed, which are consistent to the spectrum obtained from the NaClO–H2O2 system. Additional emission bands at 680 nm further confirmed the formation of singlet oxygen dimers. The high CL intensity and the chemically green nature of K2FeO4, prompt us to further develop it as a novel CL reagent. Sensitive response and wide calibration ranges were obtained for dopamine, ascorbic acid, and ethanol. The linear range for the determination of three analytes were 50 nM to 50 μM for dopamine (LOD: 20 nM), 5.0 μM to 1.0 mM for ascorbic acid (LOD: 2.21 μM), and 0.5 μM to 1.0 mM for ethanol (LOD: 0.30 μM). Thus, K2FeO4 has a great potential for the postcolumn detection of those UV featureless compounds.

Tartaric acid stabilized iridium nanoparticles with excellent laccase-like activity

“…Three kinds of free radical quenching agents, i.e. , p -benzoquinone as an ˙O 2 − quenching agent, 51 isopropyl alcohol as an ˙OH quenching agent, 52 and tryptophan as an 1 O 2 quenching agent, 53 were applied to the Tar-IrNPs catalysis system, and the changes in absorbance were recorded. As shown in Fig.…”

“…Free radical quenching experiments were subsequently performed to explore the possible involvement of reactive oxygen species (ROS) in the Tar-IrNPs catalyzed oxidation of PPD. Three kinds of free radical quenching agents, i.e., p-benzoquinone as an O 2 À quenching agent, 51 isopropyl alcohol as an OH quenching agent, 52 and tryptophan as an 1 O 2 quenching agent, 53 were applied to the Tar-IrNPs catalysis system, and the changes in absorbance were recorded. As shown in Fig.…”

Reinvestigation of Ferrate(VI) Oxidation of Bisphenol A over a Wide pH Range

“…It is reported that the redox potential of Fe­(VI) under acidic and alkaline conditions reaches +2.20 V and +0.70 V, respectively . In acidic solutions, Fe­(VI) is considered to be one of the most advanced oxidants since its redox potential is greater than that of ozone (2.08 V) and permanganate (1.67 V). − In the past few decades, Fe­(VI) serves as a multifunctional reagent and has been widely used to control inorganic compounds, , heavy metals, and sludge disintegration and dewatering. , Moreover, Fe­(VI) oxidation is promising in eliminating EDCs, such as phenolics, amines, organosulfur compounds, etc. Additionally, the major reductive product of Fe­(VI) is Fe­(OH) 3 , which can work as an adsorbent or coagulant reagent, and further contribute to the removal of organic contaminants …”

Kinetically Controlled, Scalable Synthesis of γ‐FeOOH Nanosheet Arrays on Nickel Foam toward Efficient Oxygen Evolution: The Key Role of In‐Situ‐Generated γ‐NiOOH

“…[ 16 ] As the reaction time attains 6 h, the solution without NaOH (0 m ) changes to orange, and shows a typical Tyndall effect when a red laser goes through it (Figure S12, Supporting Information), reflecting the formation of Fe(OH) 3 colloid according to Equation (1). [ 17 ] While no obvious changes are observed in the solutions with NaOH ranging from 1 to 12 m , indicative of a different hydrolysis pathway based on Equation (2). As the reaction time continuously proceeds for 12 h, the consumption of FeO 4 2− leads to lighter color of the solutions, in particular, the 1 m NaOH one.…”