Efficient removal of direct yellow dye using chitosan crosslinked isovanillin derivative biopolymer utilizing triboelectric energy produced from homogeneous catalysis

Alabbad, Eman A.; Bashir, Sajid; Liu, Jingbo Louise

doi:10.1016/j.cattod.2021.06.017

Cited by 9 publications

(2 citation statements)

References 61 publications

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“…Regarding the disparity in MO degradation observed between Al2O3 I and Al2O3 II, it is likely attributed to the fact that Al2O3 I, with its much smaller particles, forms more friction with silicon single crystals compared to Al2O3 II when subjected to the same magnetic stirring conditions. In tribo-catalytic investigations, it is widely accepted that friction energy excites electron-hole pairs in materials during friction [45][46][47], which subsequently induces redox reactions in ambient environments. Given the degradation of MO solutions associated with silicon single crystals observed in this study, it is reasonable to assume that, through the friction between Al2O3 particles and silicon single crystals in magnetic stirring, as shown in Figure 7, electron-hole pairs are excited in silicon:…”

Section: Resultsmentioning

confidence: 99%

Tribo-Catalytic Degradation of Methyl Orange Solutions Enhanced by Silicon Single Crystals

Cui,

Guo,

Lei

et al. 2023

Coatings

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Coating materials on the bottoms of reactors/beakers has emerged as an effective method to regulate tribo-catalytic reactions. In this study, silicon single crystals were coated on the bottoms of glass beakers, in which 30 mg/L methyl orange (MO) solutions suspended with alumina nanoparticles were subjected to magnetic stirring using Teflon magnetic rotary disks. With a gentle rotating speed of 400 rpm for the Teflon disks, the MO solutions were changed from yellow to colorless and the characteristic absorption peak of MO at 450 nm in the UV-Vis spectrum disappeared entirely within 120 min. Mass spectrometry tests were further performed to gain insights into the degradation process, which suggested that the degradation was initiated with the cleavage of the nitrogen-nitrogen double bond in ionized MO molecules by the attack of •OH radicals. Through comparison experiments, we established that the observed degradation was related to the friction between alumina and silicon during magnetic stirring, and hydroxyl and superoxide radicals were formed from the friction, according to electron paramagnetic resonance analysis. It is proposed that electron-hole pairs are excited in silicon single crystals through friction with alumina, which diffuse to the surface of the single crystals and result in the degradation.

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Section: Resultsmentioning

confidence: 99%

Tribo-Catalytic Degradation of Methyl Orange Solutions Enhanced by Silicon Single Crystals

Cui,

Guo,

Lei

et al. 2023

Coatings

View full text Add to dashboard Cite

show abstract

“…18 This then generates free radicals with water and oxygen in the environment to realize tribocatalytic reactions. 19 The generation of electrons and holes is mainly determined by the energy band structure of the catalyst.…”

Section: Introductionmentioning

confidence: 99%