A novel electronic nose for sensing (E)-2-hexenal based on Mn-MOF nanonets with NADPH-like activity.

Bioreceptors are increasingly popular for selective aroma sensing but face challenges with receptor separation and cell culture. Here, we developed a bioreceptor-free electronic nose employing Mn-metal organic framework (Mn-MOF) nanonets as sensing materials for rapid electrochemical quantification of (E)-2-hexenal, a characteristic aroma commonly found in various foods. A simple solvent-mediated morphology engineering technology was proposed to create Mn-MOF structures, including nanoparticles, nanowires, and nanonets.

Correction: Celery-derived porous carbon materials for superior performance supercapacitors.

[This corrects the article DOI: 10.1039/D1NA00342A.].

Correction: Bio-inspired hierarchical nanoporous carbon derived from water spinach for high-performance supercapacitor electrode materials.

[This corrects the article DOI: 10.1039/D1NA00636C.].

Correction: Effect of pomelo seed-derived carbon on the performance of supercapacitors.

[This corrects the article DOI: 10.1039/D0NA00778A.].

Correction: A hierarchical porous P-doped carbon electrode through hydrothermal carbonization of pomelo valves for high-performance supercapacitors.

[This corrects the article DOI: 10.1039/D0NA00211A.].

Correction: A hierarchical integrated 3D carbon electrode derived from gingko leaves hydrothermal carbonization of HPO for high-performance supercapacitors.

[This corrects the article DOI: 10.1039/D3NA90045B.][This corrects the article DOI: 10.

The Enhancement Mechanism of Different Single-Transition Metal Atomic Catalysts/Sulfur Cathode on High-Performance of Li-S Batteries.

Materials with various single-transition metal atoms dispersed in nitrogenated carbons (M─N─C, M = Fe, Co, and Ni) are synthesized as cathodes to investigate the electrocatalytic behaviors focusing on their enhancement mechanism for performance of Li-S batteries. Results indicate that the order of both electrocatalytic activity and rate capacity for the M─N─C catalysts is Co > Ni > Fe, and the Co─N─C delivers the highest capacity of 1100 mAh g at 1 C and longtime stability at a decay rate of 0.05% per cycle for 1000 cycles, demonstrating excellent battery performance.

Correction: A hierarchical integrated 3D carbon electrode derived from gingko leaves hydrothermal carbonization of HPO for high-performance supercapacitors.

[This corrects the article DOI: 10.1039/D2NA00758D.].

A hierarchical integrated 3D carbon electrode derived from gingko leaves hydrothermal carbonization of HPO for high-performance supercapacitors.

Electrochemical ultracapacitors derived from green and sustainable materials could demonstrate superior energy output and an ultra-long cycle life owing to large accessible surface area and obviously shortened ion diffusion pathways. Herein, we have established an efficient strategy to fabricate porous carbon (GLAC) from sustainable gingko leaf precursors by a facile hydrothermal activation of HPO and low-cost pyrolysis. In this way, GLAC with a hierarchically porous structure exhibits extraordinary adaptability toward a high energy/power supercapacitor (∼709 F g at 1 A g) in an aqueous electrolyte (1 M KOH).

Bio-inspired hierarchical nanoporous carbon derived from water spinach for high-performance supercapacitor electrode materials.

Due to various properties, green carbon nanomaterials with high specific surface area and environmentally friendly features have aroused extensive interest in energy storage device applications. Here, we report a facile, one-step carbonization of water spinach to synthesize porous carbon that exhibits a high specific surface area of ∼1559 m g, high specific capacitance (∼1191 F g at 1 A g), a low intercept (0.9 Ω), outstanding rate capability and superior cycling stability (94.

A Battery-Like Self-Selecting Biomemristor from Earth-Abundant Natural Biomaterials.

Using the earth-abundant natural biomaterials to manufacture functional electronic devices meets the sustainable requirement of green electronics, especially for the practical application of memristors in data storage and neuromorphic computing. However, the sneak currents flowing though the unselected cells in a large-scale cross-bar memristor array is one of the major problems which need to be tackled. The self-selecting memristors can solve the problem to develop compact and concise integrated circuits.

Oxygen-defect-rich 3D porous cobalt-gallium layered double hydroxide for high-performance supercapacitor application.

In this work, oxygen-defect-rich, three-dimensional (3D) cobalt-gallium layered double hydroxides (Co-Ga-LDH) assembled by porous and ultrathin nanosheets are prepared by a simple one-step strategy. Briefly, an aqueous solution containing Co and Ga is quickly pouring into the aqueous solution of hexamethylenetetramine, the state-of-the-art LDH was obtained followed by a mild and fast hydrothermal reaction. This mild and rapid synthesis strategy introduces a large number of pores into the ultrathin LDH nanosheets, resulting in a high concentration of oxygen vacancies in the Co-Ga-LDH, and the concentration of oxygen vacancies can be arbitrarily modulated, which has been corroborated by X-ray photoelectron spectroscopy and electron spin resonance measurements.

Celery-derived porous carbon materials for superior performance supercapacitors.

Supercapacitors are of paramount importance for next-generation applications, demonstrating high energy output and an ultra-long cycle life, and utilizing green and sustainable materials. Herein, we utilize celery, a common biomass from vegetables, by a facile low-cost pyrolysis and activation method for use in high-voltage, high-energy, and high-power supercapacitors. The as-synthesized hierarchically porous carbon materials with a high surface area of 1612 m g and a large quantity of nitrogen and phosphorus heteroatoms exhibit a high specific capacitance of 1002.

Effect of pomelo seed-derived carbon on the performance of supercapacitors.

Electrochemical ultracapacitors derived from green and sustainable materials could demonstrate superior energy output and an ultra-long cycle life, which could contribute to next-generation applications. Herein, we utilize pomelo seeds, a bio-waste from pomelo, in high-energy and high-power supercapacitors by a facile low-cost pyrolysis and activation method. The as-synthesized hierarchically porous carbon is surface-engineered with a large quantity of nitrogen and sulfur heteroatoms to give a high specific capacitance of ∼845 F g at 1 A g.

A hierarchical porous P-doped carbon electrode through hydrothermal carbonization of pomelo valves for high-performance supercapacitors.

Porous carbon materials are synthesized from pomelo valves by the hydrothermal activation of HPO followed by simple carbonization. The as-synthesized hierarchically porous carbon electrode exhibits a high specific capacitance of 966.4 F g at 1 A g and an ultra-high stability of 95.

Evolution map of the memristor: from pure capacitive state to resistive switching state.

Memristors possess great application prospects in terabit nonvolatile storage devices, memory-in-logic algorithmic chips and bio-inspired artificial neural network systems. However, "what is the origin state of the memristor?" has remained an unanswered question for half a century. While many applications rely on the memristor, its origin state is becoming a fundamental issue.

3D honeycomb-like carbon foam synthesized with biomass buckwheat flour for high-performance supercapacitor electrodes.

A facile, one-step carbonization of buckwheat flour is innovated to synthesize honeycomb-like porous carbon, which exhibits specific capacitance (767 F g-1 at 1 A g-1) and stability with a retention of up to 92.6% after 10 000 cycles.

Atomic matching catalysis to realize a highly selective and sensitive biomimetic uric acid sensor.

A main challenge for biomimetic non-enzyme biosensors is to achieve high selectivity. Herein, an innovative biomimetic non-enzyme sensor for electrochemical detection of uric acid (UA) with high selectivity and sensitivity is realized by growing Prussian blue (PB) nanoparticles on nitrogen-doped carbon nanotubes (N-doped CNTs). The enhancement mechanism of the biomimetic UA sensor is proposed to be atomically matched active sites between two reaction sites (oxygen atoms of 2, 8-trione, 6.

Borate-ion intercalated NiFe layered double hydroxide to simultaneously boost mass transport and charge transfer for catalysis of water oxidation.

Borate ion-intercalated NiFe layered double hydroxide (NiFe LDH) is synthesized as a highly active electrocatalyst toward oxygen evolution reaction (OER) for the first time. With the intercalation of borate ions, the interlayer spacing and specific surface area of the NiFe LDH are increased, meanwhile the pore size distribution shifts to a larger pore size range. The borate ion-intercalated catalyst prepared at 20% of Fe content in presence of 0.

F-Doping effects on carbon-coated LiV(PO) as a cathode for high performance lithium rechargeable batteries: combined experimental and DFT studies.

F-Doping effects on polyaniline-derived carbon coated Li3V2(PO4)3 (Li3V2(PO4)3-xFx@C) as a cathode for high performance Li rechargeable batteries are systematically investigated with a combined experimental and DFT theoretical calculation approach. The results clearly indicate that the doping amount has a significant impact on the rate capability and long cycle life. The optimal material (Li3V2(PO4)2.

Center-iodized graphene as an advanced anode material to significantly boost the performance of lithium-ion batteries.

Iodine edge-doped graphene can improve the capacity and stability of lithium-ion batteries (LIBs). Our theoretical calculations indicate that center-iodization can further significantly enhance the anode catalytic process. To experimentally prove the theoretical prediction, iodine-doped graphene materials were prepared by one-pot hydrothermal and ball-milling approaches to realize different doping-sites.

Hydrothermal Preparation and White-Light-Controlled Resistive Switching Behavior of BaWO Nanospheres.

In this work, BaWO nanospheres were successfully prepared by hydrothermal process. The bipolar resistive switching behavior of Ag/BaWO/FTO device is observed. Moreover, this resistive switching behavior can be modulated by white light.