Hot Electron‐induced Electrochemiluminescence with Dimethyl Silicone Oil Coated Electrode for the Determination of Puerarin

Xue, Yuan; Xia, Yong; Han, Yu; Peng, Chao; Li, Jing; Wang, Erkang

doi:10.1002/elan.202100435

Cited by 3 publications

(1 citation statement)

References 42 publications

(33 reference statements)

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“…The electrochemical properties of the prepared n + Si/Al 2 O 3 samples were characterized in a three-electrode quartz cell on the electrochemical workstation (CHI760E, Chenhua Instruments Co., China), with a Ag/AgCl (3 M NaCl) placed nearby the working electrode and Pt plate with the same size (20 mm × 20 mm) as a counter electrode. Electrochemiluminescence (ECL) signals were recorded on an LK5100 instrument (LK5100, Lanlike Co., China) using Ru(bpy) 3 2+ as probes (ECL emission wavelength at ∼624 nm), where the luminophore probes of Ru(bpy) 3 2+* were initiated due to the participation of e solv – …”

Section: Methodsmentioning

confidence: 99%

Tunneling Electron-Mediated Electrochemical Activation of Peroxydisulfate for the Removal of Refractory Pollutants

Liu,

Mao,

Wang

et al. 2024

ACS EST Eng.

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In the SO 4 •− radical-based advanced oxidation processes (AOPs), activation of peroxydisulfate (PS) is an effective method for the removal of refractory organic pollutants. Within this context, we report a novel electrochemical activation of PS (E-PS) by solvated electrons generated via the electron tunneling effect. The results demonstrated that the sulfamethoxazole (SMX) could be completely degraded (∼100% degradation efficiency) within 30 min (k = 0.0957 min −1 ) at the pH-neutral conditions when n + Si/Al 2 O 3 was employed as the cathode. Further investigations based on electron paramagnetic resonance (EPR) and scavenger tests indicated that both SO 4•− and • OH were responsible for SMX degradation. Electrochemiluminescence (ECL) and current−voltage (I−V) characterization fitted by the tunneling models revealed the dominance of the direct electron tunneling effect at negative potential on the metal oxide semiconductor (MOS)-structured n + Si/Al 2 O 3 cathode. The tunneling electrons were accepted by the lowest unoccupied orbital energy level (LUMO) of the water molecule to produce solvated electrons (e solv − ) for subsequent PS activation and SMX removal. This study represents a paradigm shift to advance the electrochemical advanced oxidation process by creating an electron tunneling effect.

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Section: Methodsmentioning

confidence: 99%

Tunneling Electron-Mediated Electrochemical Activation of Peroxydisulfate for the Removal of Refractory Pollutants

Liu,

Mao,

Wang

et al. 2024

ACS EST Eng.

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Polymer brush functional ratiometric fluorescent sensors coupled with aptamer for visible detection of puerarin and ginsenoside via smartphone

Yang

et al. 2023

Microchemical Journal

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Reductive Degradation of Florfenicol by Electrogenerated Hydrated Electrons via the Electron Tunneling Effect

Wang,

Liu,

et al. 2024

ACS EST Eng.

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Degradation of fluorinated organic pollutants remains a challenge due to the strong electronegativity of fluorine and the high structural stability of C−F bonds. Advanced reduction processes (ARPs) based on strong reducibility of hydrated electrons (e aq − ) are effective for destroying recalcitrant fluorinated organic pollutants. Ultraviolet (UV) photolysis is a frequently used method for producing e aq − , but it is limited by the need for chemical addition and lightshielding effects. This study reported the generation of e aq − via electron tunneling based on the n + Si/Al 2 O 3 cathode with a metal−insulator-semiconductor (MIS) structure for the rapid reductive degradation of a halogenated emerging pollutant (florfenicol, FLO). The results demonstrate that the n + Si/ Al 2 O 3 cathode achieved 97.5% degradation (30 min), accounting for 92.3% defluorination and 97.0% dechlorination (120 min). The electrogenerated e aq − was responsible for the degradation and dehalogenation of FLO, as indicated by electron spin resonance (ESR) measurements, scavenger experiments, and electrochemiluminescence (ECL) tests. The theoretical calculations revealed the occurrence of electron tunneling on the thin Al 2 O 3 film at the n + Si/Al 2 O 3 cathode, where the tunneling electron jumped to the water to form e aq − . The ARPs based on electrogenerated e aq − also demonstrated efficient degradation of chloramphenicol (CAP), hydroxychloroquine (HCQ), and levofloxacin (LVF). This study not only provides a simple approach to e aq − generation via the electron tunneling effect but also suggests a possible strategy for developing ARPs to remove halogenated emerging organic pollutants in water.

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Hot Electron‐induced Electrochemiluminescence with Dimethyl Silicone Oil Coated Electrode for the Determination of Puerarin

Cited by 3 publications

References 42 publications

Tunneling Electron-Mediated Electrochemical Activation of Peroxydisulfate for the Removal of Refractory Pollutants

Tunneling Electron-Mediated Electrochemical Activation of Peroxydisulfate for the Removal of Refractory Pollutants

Polymer brush functional ratiometric fluorescent sensors coupled with aptamer for visible detection of puerarin and ginsenoside via smartphone

Reductive Degradation of Florfenicol by Electrogenerated Hydrated Electrons via the Electron Tunneling Effect

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