Highly sensitive detection of chromium (VI) by photoelectrochemical sensor under visible light based on Bi SPR-promoted BiPO4/BiOI heterojunction

Li, Mengyin; Zhang, Guangxue; Feng, Chuanqi; Wu, Huimin; Mei, He

doi:10.1016/j.snb.2019.127449

Cited by 58 publications

(22 citation statements)

References 44 publications

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“…To investigate the structural features of the as-fabricated samples, XRD measurement was performed. The XRD patterns of the samples presented in Figure 2 indicate that the main diffraction peak positions were located at the (110), (101), (202), (021), (130), and (040) crystal planes of BiPO4, at 2θ values of 21.3°, 23.4°, 27.6°, 41.5° and 50.9° [39], respectively. Additionally, the diffraction peaks were observable at 2θ values of 22.3° and 26.8°, which corresponded to the crystalline planes of PPy and graphene [40,41].…”

Section: Materials Characterizationsmentioning

confidence: 99%

Conductive Polymer (Graphene/PPy)–BiPO4 Composite Applications in Humidity Sensors

Zhu

Lin²,

Lin

et al. 2021

Polymers

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In this particular experiment, a chain of conductive polymer graphene/polypyrrole (Gr/PPy) and BiPO4—or (Gr/PPy)–BiPO4—materials were prepared and used as moisture-sensitive materials. The structure and morphology of the conductive polymer (Gr/PPy)–BiPO4 materials were analyzed using an X-ray diffractometer, scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray spectroscopy. Moreover, properties such as hysteresis loop, impedance, sensing response, and response and recovery time were calculated and evaluated using an inductance–capacitance–resistance analyzer. The data expressed that PPy/BiPO4, as prepared in this study, exhibited excellent sensing properties, with impedance changing by only a few orders of range. Furthermore, the response time and time of recovery were 340 s and 60 s, respectively, and negligible humidity hysteresis occurred at different relative humidities. Therefore, conductive PPy/BiPO4, as prepared in the present study, is an excellent candidate for application in humidity sensors.

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Section: Materials Characterizationsmentioning

confidence: 99%

Conductive Polymer (Graphene/PPy)–BiPO4 Composite Applications in Humidity Sensors

Zhu

Lin²,

Lin

et al. 2021

Polymers

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“…During the last years, extensive use of BiOI has been carried out for the elaboration of the photoelectrochemical sensor (PEC) owing to its excellent absorption ability of visible light. However, its use is limited by its low energy conversion efficiency [ 81 , 82 , 83 ]. Recently, Mengying Li et al [ 81 ] developed a PEC sensor designed by composites of BiOI along with Bi/BiOI-X for Cr(VI) monitoring in water samples with a satisfactory recovery of 98–102% at a concentration as low as 15.6 µg·L −1 .…”

Section: Electrochemical Sensors For Hexavalent Chromium Determinamentioning

confidence: 99%

“…Then, the consumed electrons lead to the enhancement of photocurrent density. The same research group proposed another PEC sensor for Cr(VI) detection based on bismuth surface plasmon resonance fostered BiPO 4 /BiOI heterostructures [ 82 ]. An improvement of the energy conversion efficiency has carried out owing to the benefits of the p-n heterojunction structure of BiPO 4 /BiOI and the effect of Bi metal SPR.…”

Section: Electrochemical Sensors For Hexavalent Chromium Determinamentioning

confidence: 99%

Recent Advances in Electrochemical Monitoring of Chromium

Hilali

Mohammadi

Amine

et al. 2020

Sensors

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The extensive use of chromium by several industries conducts to the discharge of an immense quantity of its various forms in the environment which affects drastically the ecological and biological lives especially in the case of hexavalent chromium. Electrochemical sensors and biosensors are useful devices for chromium determination. In the last five years, several sensors based on the modification of electrode surface by different nanomaterials (fluorine tin oxide, titanium dioxide, carbon nanomaterials, metallic nanoparticles and nanocomposite) and biosensors with different biorecognition elements (microbial fuel cell, bacteria, enzyme, DNA) were employed for chromium monitoring. Herein, recent advances related to the use of electrochemical approaches for measurement of trivalent and hexavalent chromium from 2015 to 2020 are reported. A discussion of both chromium species detections and speciation studies is provided.

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“…However, a remaining challenge is to improve PEC detection sensitivity, which can be addressed by two strategies. One is surface modification via nanomaterials, such as BiPO 4 /BiOI [ 20 ], PbS [ 21 ], and TiO 2 [ 22 ], for Cr(VI) detection in water samples [ 21 , 22 ]. Among various nanomaterials, scheelite monoclinic BiVO 4 is one of the most promising visible-light-responsive electrode materials due to a wide bandgap, excellent stability, and low toxicity [ 23 ] that is widely used in optoelectronics research [ 24 ] and a potential nanomaterial for photoelectric detection of the heavy metal Cr(VI).…”

Section: Introductionmentioning

confidence: 99%

Carnation-like Morphology of BiVO4-7 Enables Sensitive Photoelectrochemical Determination of Cr(VI) in the Food and Environment

Tan

Chen

et al. 2022

Biosensors

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Hexavalent chromium, namely, Cr(VI), is a significant threat to ecological and food safety. Current detection methods are not sensitive to Cr(VI). A photoelectrochemical (PEC) sensor based on bismuth vanadate (BiVO4) was developed for sensitive detection of Cr(VI). First, BiVO4-X (X: the pH of the reaction precursor solution) was synthesized using a facile surfactant-free hydrothermal method. The BiVO4-X morphology was well controlled according to pH values, showing rock-like (X = 1), wrinkled bark-like (X = 4), carnation-like (X = 7), and the collapsed sheet-like morphologies (X = 9, 12). BiVO4-7 exhibited excellent photoelectric performance due to a proper band structure under visible light and a large specific surface area. Then, BiVO4-7 was used to construct a PEC sensor to detect Cr(VI), which was demonstrated to have a low detection limit (10 nM) and wide detection range (2–210 μM). The BiVO4-7 PEC sensor had a stable output signal, as well as excellent reproducibility, repeatability, and selectivity. We used the BiVO4-7 PEC sensor to detect Cr(VI) in real environmental and food samples, resulting in a satisfactory recovery of 90.3–103.0%, as determined by comparison with results obtained using a spectrophotometric method. The BiVO4-7 PEC sensor is promising for practical application to heavy metal detection in the food and environment.

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Highly sensitive detection of chromium (VI) by photoelectrochemical sensor under visible light based on Bi SPR-promoted BiPO4/BiOI heterojunction

Cited by 58 publications

References 44 publications

Conductive Polymer (Graphene/PPy)–BiPO4 Composite Applications in Humidity Sensors

Conductive Polymer (Graphene/PPy)–BiPO4 Composite Applications in Humidity Sensors

Recent Advances in Electrochemical Monitoring of Chromium

Carnation-like Morphology of BiVO4-7 Enables Sensitive Photoelectrochemical Determination of Cr(VI) in the Food and Environment

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