Photoelectrochemical detection of superoxide anions released from mitochondria in HepG2 cells based on the synergistic effect of MnO2@Co3O4 core-shell p-n heterojunction

Recent Progress in Photoelectrochemical Sensing of Pesticides in Food and Environmental Samples: Photoactive Materials and Signaling Mechanisms

“…Also, the strong redox ability of photogenerated charges reduces the dependence on the applied potential, thus endowing PEC sensing superior performance compared to electrochemical analysis [42]. Owing to these advantages, PEC sensing has been widely used in many fields such as disease diagnosis [43][44][45], health monitoring [46][47][48], and medical science [49,50]. Meanwhile, it meets the demand for rapid, convenient, sensitive, and accurate detection of pesticide residues in food and environmental samples [41,51,52].…”

Photocurrent Polarity Reversal Induced by Electron-Donor Release for the Highly Sensitive Photoelectrochemical Detection of Vascular Endothelial Growth Factor 165

“…For example, Zhao et al enhanced the anodic PEC performance of the MnO 2 @Co 3 O heterostructure by using ascorbic acid (AA) as an electron donor to consume the produced holes. 13 Zhang's team achieved cathodic photocurrent enhancement by using dissolved oxygen (O 2 ) as an electron acceptor. 14 Nevertheless, the formation of an insulating biomolecular layer on the PEC sensor inhibited electron transfer between the added electron sacrifice and the electrode surface.…”

“…In the PEC process, the electron donor can consume photogenerated holes to prevent the recombination of electron–hole pairs and generate anodic photocurrent when the valence band (VB) position of the photoactive material is lower than the VB position of the electron donor. − In contrast, the conduction band (CB) position being higher than that of the electron acceptor can facilitate the reduction reaction to produce a cathodic photocurrent. − Overall, the generation of cathodic/anodic photocurrent requires a well-matched energy level between the photoelectrode material and the electron donor/acceptor. − Therefore, the addition of an electron donor/acceptor with a suitable energy band in the electrolyte can promote photocurrent enhancement. For example, Zhao et al enhanced the anodic PEC performance of the MnO 2 @Co 3 O heterostructure by using ascorbic acid (AA) as an electron donor to consume the produced holes . Zhang’s team achieved cathodic photocurrent enhancement by using dissolved oxygen (O 2 ) as an electron acceptor .…”

Chemiluminescence‐driven photoelectrochemical sensor: A mini review

“…The continual expansion in photoactive materials and sensing strategies has significantly propelled the rapid progress in PEC analysis [14][15][16][17]. As a result of these advancements, numerous PEC sensing platforms have been successfully established and applied for detecting various analytes, including ions [18], small molecules [19][20][21][22][23][24][25], biomacromolecules [26][27][28][29], cells [30][31][32][33], microorganisms [34][35][36][37], and in vivo detection [38][39][40].…”

“…The continual expansion in photoactive materials and sensing strategies has significantly propelled the rapid progress in PEC analysis [14–17]. As a result of these advancements, numerous PEC sensing platforms have been successfully established and applied for detecting various analytes, including ions [18], small molecules [19–25], biomacromolecules [26–29], cells [30–33], microorganisms [34–37], and in vivo detection [38–40]. A number of key reviews have comprehensively summarized significant research advancements in PEC detection, covering topics such as photoactive materials [13, 28, 41–52], sensing modalities [53–58], and target analytes [37, 59–64].…”