Effects of humidity on cellulose pellets loaded with potassium titanium oxide oxalate for detection of hydrogen peroxide vapor in powders

Kastvig, Maria H.; Hirschberg, Cosima; Berg, Frans W.J. van den; Rantanen, Jukka; Andersen, Mogens L.

doi:10.1016/j.powtec.2020.02.043

Cited by 9 publications

(4 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fluorescence emission intensity was recorded as soon as DI water had filled the channel. The fluorescence intensity increased rapidly, and the maximum value was reached after 10 s. Quantitative analysis of H 2 O 2 generation in the microfluidic channel was performed by using potassium titanium oxalate (PTO; K 2 TiO(C 2 O 4 ) 2

H 2 O) according to a previously reported method ( 6 , 21 ). SI Appendix , Fig.…”

Section: Resultsmentioning

confidence: 99%

Water–solid contact electrification causes hydrogen peroxide production from hydroxyl radical recombination in sprayed microdroplets

Chen

Xia

et al. 2022

Proc. Natl. Acad. Sci. U.S.A.

110

View full text Add to dashboard Cite

Contact electrification between water and a solid surface is crucial for physicochemical processes at water–solid interfaces. However, the nature of the involved processes remains poorly understood, especially in the initial stage of the interface formation. Here we report that H 2 O 2 is spontaneously produced from the hydroxyl groups on the solid surface when contact occurred. The density of hydroxyl groups affects the H 2 O 2 yield. The participation of hydroxyl groups in H 2 O 2 generation is confirmed by mass spectrometric detection of 18 O in the product of the reaction between 4-carboxyphenylboronic acid and 18 O–labeled H 2 O 2 resulting from 18 O 2 plasma treatment of the surface. We propose a model for H 2 O 2 generation based on recombination of the hydroxyl radicals produced from the surface hydroxyl groups in the water–solid contact process. Our observations show that the spontaneous generation of H 2 O 2 is universal on the surfaces of soil and atmospheric fine particles in a humid environment.

show abstract

H 2 O) according to a previously reported method ( 6 , 21 ). SI Appendix , Fig.…”

Section: Resultsmentioning

confidence: 99%

Water–solid contact electrification causes hydrogen peroxide production from hydroxyl radical recombination in sprayed microdroplets

Chen

Xia

et al. 2022

Proc. Natl. Acad. Sci. U.S.A.

110

View full text Add to dashboard Cite

show abstract

“…The above results indicated that the enhanced electron local density at Cu active sites indeed reduced the activation energy and drove the rapid catalytic reaction process. In addition, through the quantitative analysis of decomposition behavior of H 2 O 2 and the generation concentration of • OH radicals (Figure b,c), we found that this higher local electron density distribution in the Cu 2 Se/H 2 O 2 system could also promote the faster decomposition of H 2 O 2 to • OH radicals and the concentration of • OH radicals generated increased from 18 μM in Cu 2 O/H 2 O 2 to 66 μM in the Cu 2 Se/H 2 O 2 system. , The proportion of H 2 O 2 decomposed into • OH radicals per unit in the Cu 2 Se system was higher than that in the two other systems (Figure S4). Thus, we have reasons to believe that the catalytic activity of Fenton’s reaction can be regulated by altering the electron cloud density of active atoms.…”

Section: Resultsmentioning

confidence: 81%

“…40 The above results indicated that the enhanced electron local density at Cu active sites indeed reduced the activation energy and drove the rapid catalytic reaction process. In addition, through the quantitative analysis of decomposition behavior of H 2 O 2 and the generation concentration of 31,41 The proportion of H 2 O 2 decomposed into • OH radicals per unit in the Cu 2 Se system was higher than that in the two other systems (Figure S4). Thus, we have reasons to believe that the catalytic activity of Fenton's reaction can be regulated by altering the electron cloud density of active atoms.…”

Section: Effect Of Enhanced Local Electron Density On Catalytic Mecha...mentioning

confidence: 99%

Chalcogen Elements in Regulating the Local Electron Density of Cu₂X for an Efficient Heterogeneous Fenton-like Process

Dai

Sheng

Xia

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

In this work, a novel strategy for Fenton activity improvement of Cu 2 X was reported, in which the local electron density of Cu sites was regulated via manipulation of simple chalcogen elements (O, S, and Se). Among them, Cu 2 Se catalysts show excellent catalytic activity to activate H 2 O 2 for the complete removal of ofloxacin (10 mg/L) at an initial pH of 6.5 within 120 min. Radical scavenger experiments and electron spin resonance spectroscopy confirm that • OH radicals are the primary oxygen reactive species to drive ofloxacin degradation. In addition, density functional theory calculations further proved that electrons would migrate from X and accumulate on Cu active sites in the order Se > S > O. Compared with Cu 2 O and Cu 2 S, the highly concentrated electron density of Cu atoms in Cu 2 Se not only decreased the activation energy of the Fenton-like reaction but also boosted the Cu 2+ /Cu + cycle with the generation of more • OH radicals (18−66 μm) and the maintenance of high stability of catalysts, leading to excellent catalytic activity and application potential. We believe this work will lay the foundation for designing excellent Fenton catalysts for practical applications since developing a heterogeneous Fenton system with the highest oxidation efficiency has always been the long-term goal in this field.

show abstract

“…Titanyl salts react with hydrogen peroxide and form yellow-colored epoxides ( Fig. 1 ) [6] . We here report a method based on cellulose particles loaded with titanyl salt to measure H 2 O 2 vapor in powder systems.…”

Section: Methods Detailsmentioning

confidence: 99%

Measurement of hydrogen peroxide vapor in powders with potassium titanium oxide oxalate loaded cellulose pellets as probes

Kastvig

Boetker

et al. 2021

MethodsX

Self Cite

View full text Add to dashboard Cite

An image-based method for determining H 2 O 2 vapor pressures in powder systems was developed based on cellulose pellets loaded with potassium titanium oxide oxalate (PTO Pellets) as probe particles. Solid titanyl salts change color after exposure to hydrogen peroxide vapor and the quantitative response of PTO pellets to H 2 O 2 has been established by comparing reactions with H 2 O 2 in liquid and solid states. Analysis of pictures of the color changes of PTO Pellets mixed into powders can be used to monitor the presence of ppm levels of H 2 O 2 vapor inside powder systems such as bleach containing dry detergent powders. H 2 O 2 vapor quantification in dry systems with titanyl loaded cellulose particles. Simple fabrication of H 2 O 2 probe particles. High sensitivity with LOD 0.190 ppm H 2 O 2 .

show abstract

Effects of humidity on cellulose pellets loaded with potassium titanium oxide oxalate for detection of hydrogen peroxide vapor in powders

Cited by 9 publications

References 24 publications

Water–solid contact electrification causes hydrogen peroxide production from hydroxyl radical recombination in sprayed microdroplets

Water–solid contact electrification causes hydrogen peroxide production from hydroxyl radical recombination in sprayed microdroplets

Chalcogen Elements in Regulating the Local Electron Density of Cu₂X for an Efficient Heterogeneous Fenton-like Process

Measurement of hydrogen peroxide vapor in powders with potassium titanium oxide oxalate loaded cellulose pellets as probes

Contact Info

Product

Resources

About

Effects of humidity on cellulose pellets loaded with potassium titanium oxide oxalate for detection of hydrogen peroxide vapor in powders

Cited by 9 publications

References 24 publications

Water–solid contact electrification causes hydrogen peroxide production from hydroxyl radical recombination in sprayed microdroplets

Water–solid contact electrification causes hydrogen peroxide production from hydroxyl radical recombination in sprayed microdroplets

Chalcogen Elements in Regulating the Local Electron Density of Cu2X for an Efficient Heterogeneous Fenton-like Process

Measurement of hydrogen peroxide vapor in powders with potassium titanium oxide oxalate loaded cellulose pellets as probes

Contact Info

Product

Resources

About

Chalcogen Elements in Regulating the Local Electron Density of Cu₂X for an Efficient Heterogeneous Fenton-like Process