Recent advances in electrochemical non-enzymatic glucose sensors - A review.

Supercapacitors have become the most significant energy conversion and storage system in recent renewable and sustainable nanotechnology. Due to its large energy capacity and supply with relatively short time and longer lifetime, supercapacitors breakthrough in advance energy applications. This review presents a comparative study of different materials, working principles, analysis, applications, advantages and disadvantages of various technologies available for supercapacitors. The aim of this article is to discuss the possibility of hybrid supercapacitor for the next generation of energy technology. The development of composite materials containing a wide range of active constituents (e.g., graphene, activated carbon, transition metals, metal oxides, perovskites and conducting polymers) by in-situ hybridization and ex-situ recombination is also discussed. This review consecrated largely the contribution of combining all materials (electrode and electrolyte) and their synthesis process and electrochemical performance. Enduringly, the potential issues and the perspectives for future research based on hybrid supercapacitors in energy applications are also presented.

Advanced materials and technologies for hybrid supercapacitors for energy storage – A review

Herein, we report a multitasking Cu-MOF/rGO hybrid, fabricated by simple ultra-sonication of slow diffusion driven Cu-MOF crystals with chemically synthesized reduced graphene oxide (rGO). The molecular structure of the Cu-MOF was authenticated by single crystal X-ray studies. The prepared materials have been probed by various physicochemical characterization techniques. Due to the positive synergistic effects between Cu-MOF crystals and rGO nanosheets, the newly synthesized Cu-MOF/rGO hybrid delivers high charge storage efficiency (685.33 F g−1 at 1.6 A g−1), high energy (137.066 W h kg−1) and power density (4800.04 W kg−1) and excellent rate ability (retains 71.01% of its initial capacitance at 8 A g−1). Furthermore, the long cycle life (91.91% after 1000 cycles) of this hybrid indicates its high stability on the electrode surface. Additionally, the electrode modified with the Cu-MOF/rGO hybrid performs exceptionally towards the electrochemical detection of nitrite in a wide dynamic linear range of 3–40 000 μM (R2 = 0.99911), with a notable detection limit of 33 nm and a high sensitivity of 43.736 μA μM−1 cm−2. The versatility of the Cu-MOF/rGO modified electrode can be observed by distinguished selectivity in the presence of some common interfering species and also ability to detect nitrite in real samples.

A fascinating multitasking Cu-MOF/rGO hybrid for high performance supercapacitors and highly sensitive and selective electrochemical nitrite sensors

https://pubs.rsc.org/en/content/articlepdf/2020/cc/d0cc05650b

Electrochemical non-enzymatic glucose sensors: recent progress and perspectives

Metal oxide based non-enzymatic electrochemical sensors for glucose detection

Hydrothermally grown α-MnO2 nanorods as highly efficient low cost counter-electrode material for dye-sensitized solar cells and electrochemical sensing applications

Herein, we have reported a novel composite of nitrogen doped reduced graphene oxide (N-rGO) and strontium zirconate (SrZrO3). This new composite (N-rGO/SrZrO3) was synthesized using the reflux method. The physicochemical properties of N-rGO/SrZrO3 were determined using different advanced techniques such XRD, FE-SEM, EDX, FTIR and BET. Furthermore, a glassy carbon electrode was modified with N-rGO/SrZrO3 (GCE-2). This modified electrode was employed for the sensing of HQ. The electrochemically active surface area (ECSA) of this modified electrode (GCE-2) was calculated by employing the Randles–Sevcik equation. Furthermore, GCE-2 exhibited a good detection limit (0.61 μM) including high selectivity towards HQ.

/pdf/a-highly-sensitive-and-selective-hydroquinone-sensor-based-4tetvztjak.pdf

A highly sensitive and selective hydroquinone sensor based on a newly designed N-rGO/SrZrO3 composite

In this study, zinc oxide-graphitic carbon nitride (ZnO-CN) nanohybrid has been synthesized via a facile in-situ one pot solid-state thermal decomposition method, here [Zn(hmp-H)2(H2O)(μ-Cl)Zn(μ-Cl)(Cl)3] was used as single-source molecular precursor (SSMP) for ZnO and urea was taken as a source for graphitic carbon nitride (CN). Synthesized ZnO-CN nanohybrid was used as a modifier towards the fabrication of a binder free glassy carbon electrode surface (ZnO-CN/GCE) for detection of –NO2 containing aromatic compounds. The developed sensor shows the remarkable sensitive lower detection limit responses of 100 nM, 110 nM, 202 nM towards the 4-nitrotoluene (4-NT); 2,4-dinitrotuluene (2,4-DNT); 2,4,6-trinitrophenol (2,4,6-TNP), respectively. Further, a superior and rapid photo-catalytic degradation of Chicago Sky Blue (CSB), Congo Red (CR) and Methylene Blue (MB) was also achieved by employing ZnO-CN as a photo-catalyst with the percentage degradation of ∼85-99.6%. The alluring performance of the ZnO-CN nanohybrid towards the sensing of -NO2 containing aromatics and degradation of organic pollutants was ascribed to high surface area of as synthesized nanohybrid and heterojunction formed between the interfaces of ZnO and graphitic carbon nitride. These properties may facilitate the electron transfer process due to the higher electron conductivity and the separation of photo-induced electron−hole pairs.

Zinc oxide-graphitic carbon nitride nanohybrid as an efficient electrochemical sensor and photocatalyst

A (CH3NH3)3Bi2I9 Perovskite Based on a Two-Step Deposition Method: Lead-Free, Highly Stable, and with Enhanced Photovoltaic Performance

A highly selective Fe@ZnO modified disposable screen printed electrode based non-enzymatic glucose sensor (SPE/Fe@ZnO)

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