Abstract:Electrochemical Sensors Recently, several detection strategies for nitrite have been utilized, i.e., spectrophotometry, [3][4][5] chromatography, [6][7][8] chemiluminescence, [9][10][11] and capillary electrophoresis. [12,13] However,
“…Nitrites from anthropogenic activities of agriculture i. e., usage of N based fertilizers and industrial effluents, is the one of the major reason for the ever growing pollution of ground water . Contamination of nitrite in drinking water results in stomach cancer and blue baby syndrome by the formation of N ‐ nitrosoamines . Thus, the detrimental effect of nitrite on environment and human health makes its monitoring of utmost importance in public health and food industries.…”
Section: Introductionmentioning
confidence: 54%
“…The detection limit of the sensor towards nitrite is calculated as per the IUPAC formula i. e., D L =3 S/m; S=standard deviation of the current response, 3=signal‐to‐noise ratio, m=slope of inset, Figure B and it was found to be 0.1 μM. Note that the calculated D L is lesser than the approved level of nitrite concentration in the potable water . The obtained analytical parameters i. e., sensitivity and linearity of the developed sensor is comparable with various nitrite sensors which are constructed based on the molybdenum based TMD composites (Table ) .…”
The present work reports a simple and single‐step hydrothermal synthesis of MoSe2−MoO3 composite for highly sensitive and selective electrochemical oxidation of nitrite. FESEM of the MoSe2−MoO3 hybrid revealed the formation of composite as laminated structure of different sizes piled up together as finger‐like MoSe2 bars whilst other physico‐chemical characterizations (XRD, FTIR, UV‐Vis, XPS) confirmed that co‐existence of MoO3 as a major by‐product of hydrothermal synthesis. The as‐fabricated MoSe2−MoO3 composite based nitrite sensor showed remarkable selectivity and reproducibility with <3s of response time, excellent sensitivity and detection limit of 10.84 A M−1 cm−2 (R2=0.996) and 0.1 μM, respectively, in the range of 2.5–80 μM. The obtained sensitivity can be credited to the high surface area obtained from 1T phase MoSe2 and α phase MoO3 as the sensing material. The developed sensor was effectively evaluated for electrochemical recognition of nitrite in the water samples (potable and tap water) gathered from an industrial area. This new and efficient MoSe2−MoO3 based electrode material offers a new frontier for the progress of a novel composites by simple and single‐step approach which can be used for progress of non‐enzymatic and inexpensive electrochemical sensors for a wide range of analytical applications.
“…Nitrites from anthropogenic activities of agriculture i. e., usage of N based fertilizers and industrial effluents, is the one of the major reason for the ever growing pollution of ground water . Contamination of nitrite in drinking water results in stomach cancer and blue baby syndrome by the formation of N ‐ nitrosoamines . Thus, the detrimental effect of nitrite on environment and human health makes its monitoring of utmost importance in public health and food industries.…”
Section: Introductionmentioning
confidence: 54%
“…The detection limit of the sensor towards nitrite is calculated as per the IUPAC formula i. e., D L =3 S/m; S=standard deviation of the current response, 3=signal‐to‐noise ratio, m=slope of inset, Figure B and it was found to be 0.1 μM. Note that the calculated D L is lesser than the approved level of nitrite concentration in the potable water . The obtained analytical parameters i. e., sensitivity and linearity of the developed sensor is comparable with various nitrite sensors which are constructed based on the molybdenum based TMD composites (Table ) .…”
The present work reports a simple and single‐step hydrothermal synthesis of MoSe2−MoO3 composite for highly sensitive and selective electrochemical oxidation of nitrite. FESEM of the MoSe2−MoO3 hybrid revealed the formation of composite as laminated structure of different sizes piled up together as finger‐like MoSe2 bars whilst other physico‐chemical characterizations (XRD, FTIR, UV‐Vis, XPS) confirmed that co‐existence of MoO3 as a major by‐product of hydrothermal synthesis. The as‐fabricated MoSe2−MoO3 composite based nitrite sensor showed remarkable selectivity and reproducibility with <3s of response time, excellent sensitivity and detection limit of 10.84 A M−1 cm−2 (R2=0.996) and 0.1 μM, respectively, in the range of 2.5–80 μM. The obtained sensitivity can be credited to the high surface area obtained from 1T phase MoSe2 and α phase MoO3 as the sensing material. The developed sensor was effectively evaluated for electrochemical recognition of nitrite in the water samples (potable and tap water) gathered from an industrial area. This new and efficient MoSe2−MoO3 based electrode material offers a new frontier for the progress of a novel composites by simple and single‐step approach which can be used for progress of non‐enzymatic and inexpensive electrochemical sensors for a wide range of analytical applications.
“…In addition to the nanostructured NRs form of ZnO, surface-modified ZnO NRs with metals/metal oxides have been used to fabricate biosensors [397][398][399][400]. ZnO seed layer followed by hydrothermal growth of ZnO NRs and Au deposition (Fig.…”
An easy, stable, and reproducible nanomaterial deposition/growth method is crucial for the realization of fabricated biosensor devices' performance, such as device stability, and reproducibility, as well as other sensing properties. Key challenges for optimum deposition include stability, reproducibility, repeatability, and the ability of deposited nanomaterials to address these challenges is critiqued.
“…In another report, Ahmad et al fabricated a non-enzymatic based nitrite sensor using Fe 2 O 3 NPs coated ZnO NRs [ 44 ]. In this method, ZnO NRs were synthesized using a solution based approach and modified by dipping in a precursor solution followed by characterizations of the as-synthesized nanostructure material using X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM), which confirmed the synthesis and surface modification.…”
Section: Metal Oxide Modified Zno Nanosheets Based Biosensormentioning
Advancing as a biosensing nanotechnology, nanohybrids present a new class of functional materials with high selectivity and sensitivity, enabling integration of nanoscale chemical/biological interactions with biomedical devices. The unique properties of ZnO combined with metal oxide nanostructures were recently demonstrated to be an efficient approach for sensor device fabrication with accurate, real-time and high-throughput biosensing, creating new avenues for diagnosis, disease management and therapeutics. This review article collates recent advances in the modified ZnO nanostructured metal oxide nanohybrids for efficient enzymatic and non-enzymatic biosensor applications. Furthermore, we also discussed future prospects for nanohybrid materials to yield high-performance biosensor devices.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
