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- W4311457583 abstract "In this work, a uniform nickel hydroxide (Ni(OH)2) overlayer was deposited on the surface of hematite (Fe2O3) via a facile one-step hydrothermal method. The resulting Ni(OH)2 decorated Fe2O3 (Ni(OH)2/Fe2O3) exhibits excellent PEC glucose oxidation with a high photocurrent of 102.6 μA at −0.26 V vs SCE, which is ca. 5 times higher than that of bare Fe2O3 toward 1 mM glucose. In addition, the onset potential displays ca. 120 mV cathodic shift, indicative of an accelerated glucose oxidation kinetics over Fe2O3. Comprehensive investigations reveal that the improved PEC performance is attributed to the dual roles of Ni(OH)2, that is, (i) Ni(OH)2 could passivate the surface states of Fe2O3, thus suppress the surface charge recombination; and, (ii) the decoration of Ni(OH)2 enlarged band bending at the interface of Fe2O3/electrolyte, thus facilitated the charge separation and transfer. Being used as PEC sensor, Ni(OH)2/Fe2O3 exhibited two linear ranges between the photocurrent (I) and the concentration of glucose (c). Under low c (0.01–0.10 mM), I is in linear relationship with c with the sensitivity of 248.8 µA·mM−1·cm−2; while at high c (0.10–10 mM), I is proportional to the logarithm of c. The limit of detection of glucose is calculated to be as low as 2.2 μM. Ni(OH)2/Fe2O3 sensor also exhibits good selectivity, excellent reproducibility and remarkable long-term stability. Especially, Ni(OH)2/Fe2O3 PEC sensor could be used for the detection of glucose in various real samples, such as bread, toast and glucose injection, with comparable results to high performance liquid chromatography. The results provide useful information for the exploration of novel semiconductor-based PEC sensors for glucose detection." @default.
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- W4311457583 date "2023-01-01" @default.
- W4311457583 modified "2023-09-22" @default.
- W4311457583 title "A sensitive photoelectrochemical sensor based on hematite decorated with nickel hydroxide for the detection of glucose" @default.
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- W4311457583 doi "https://doi.org/10.1016/j.jelechem.2022.117035" @default.
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