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Electrochemical water splitting is a promising approach to produce hydrogen gas, but sluggish four-electron transfer of the oxygen evolution reaction (OER) severely limits the overall energy conversion efficiency of water splitting. Herein, as an excellent OER electrocatalyst, a technique of synthesizing Fe doped CoNiSe2 nanosheet (Fe-CoNiSe2) whole series using CoFe prussian blue analog produced by Co-ZIF-L reaction as a template is proposed here. The introduction of iron ions promotes the redistribution of the cobalt-nickel charge density, which enhances the OER kinetics. In view of the abovementioned points, Fe-CoNiSe2/NF has excellent activity, electrocatalytic properties and excellent stability in alkaline media, which only demands a lower overpotential of 244 mV and 271 mV to deliver a current density of 10 mA cm-2 and 50 mA cm-2, respectively. The material also exhibits excellent stability for at least 24 h during the OER process. This work may provide some new insights into the assembly of advanced and highly-active materials for a variety of other energy conversion applications.Despite of great interests in aqueous asymmetric supercapacitors (ASC), their performance is often restricted by unsatisfactory specific capacitance of anode materials. Herein, accordion-like V2CTx MXene has been prepared and exploited as novel anode material for aqueous ASC in neutral ZnSO4 electrolyte. Profitting from the layered structure with expanded interlayer distance, the V2CTx electrode exhibits a high specific capacitance of 481F g-1 at 1 A g-1, a reasonable rate performance and intriguing cycling stability with capacitance retention of 84.3% after 60,000 cycles at 10 A g-1 in 2 M ZnSO4 electrolyte. Furthermore, an ASC device based on the V2CTx as anode and activated carbon (AC) as cathode was successfully assembled in the ZnSO4 electrolyte, which achieves a wide potential window up to 1.8 V. Remarkably, the V2CTx//AC ASC delivers a high energy density of 34 W h kg-1 at a power density of 954 W kg-1, as well as superb cycling stability with capacitance retention of 79% even after 100,000 charge/discharge cycles at 10 A g-1. The intriguing electrochemical performance, especially the ultralong cycling life, make the V2CTx MXene electrode promising in aqueous energy storage devices.Phosphorus is anon-renewable resource. Supplies are limited and muchphosphorusis currently wasted during the production and utilization process, causing concerns about future supplies and widespread environmental problems. To solve these problems, a new type of NiFe-LDH/rGO electrically switched ion-selective (ESIX) film is designed, based on the dominant mechanism of inner-sphere complexation. An ESIX process allows the NiFe-LDH/rGO hybrid film to achieve a controllably selective uptake and release of the phosphate anions. This route involves tuning potential steps to regulate the redox states of the composite film and the variable metal (e.g., Ni, Fe (II)/(III)) in coordination centers, as the inner-sphere complexation of the metals to phosphate anions is combined with the assistance of the outer electric field. A high absorption capacity (270 mg·g-1) and regeneration rate (>85%) were achieved, together with good cycle stability.Although the evaporation efficiency of photothermal materials (PMs) in pure water and brine solutions has been extensively studied, there few research on the performance in complex oily wastewater. Herein, a new monolithic solar steam generator derived from kapok fiber-based MXene composite aerogel (named as KFs-MXene) was fabricated by dipping the aerogels (KFs) which composed of kapok fiber and sodium alginate (SA) as substrates in the suspension of MXene. Benefitting from the outstanding light absorption (about 97%), better thermal insulation (thermal conductivity, 0.05039 W m-1 K-1), abundant porosity (95.60%) and rapid water transportation. KFs-MXene show good interfacial solar steam generation (ISSG) performance, resulting in a high water evaporation rate of 1.47 kg m-2h-1 with an outstanding evaporation efficiency of 90.4% under 1 kW m-2 irradiation. To improve the antifouling performance of KFs-MXene, chemically hydrophilic and oleophobic modification was applied, making the KFs-MXene can also be widely used in oily wastewater. Under 1 kW m-2 illumination, the evaporation rate and energy conversion efficiency of KFs-MXene with hydrophilic and oleophobic modification (O-KFs-MXene) in 1 wt% oily water can reach to 1.40 kg m-2h-1 and 82.87%, and the evaporation efficiency and rate of O-KFs-MXene remain stable in the continuous 6 h solar driven interface evaporation process.

Inflammatory bowel disease (IBD) is a chronic inflammation disease and still faces many therapeutic challenges, such as ineffective treatments, antibiotic resistance, and systematic toxicity. read more In order to improve the therapeutic efficacy of IBD, it is thus urgent to develop efficient, non-toxic and conveniently-administrated nanoagents to replace the currently used medicines. Casein phosphopeptide (CPP) has been found capable of chelating transition metal ions to suppress reactive oxygen species (ROS) generation, showing the potential for the treatment of IBD. However, CPP easily suffers from hydrolysis and enzymatic degradation, which limits its further clinical application. Covalent assembly of CPP to form nanoparticles (GCPP NPs) may be an efficient way to enhance the CPP stability in physiological environment and finally improve its capability of in vivo antioxidation and IBD treatment.

We synthesized GCPP NPs through covalent assembly of Genipin and CPP, followed by characterizing their physicochemica, have great potential in the anti-inflammatory treatment of IBD by oral administration.

GCPP NPs are robust and stable to overcome easy degradation of CPP even under the harsh gastrointestinal environments, which are adapted for oral administration. As-prepared GCPP NPs show benign antioxidant activity to scavenge ROS. Meanwhile, nanoscale GCPP NPs can passively accumulate and maintain at inflamed sites. The body weight and colon length of DSS-induced colitis mice treated by GCPP NPs perform a rehabilitation trend. These results indicate that GCPP NPs, as peptide-based therapeutic nanoagents, have great potential in the anti-inflammatory treatment of IBD by oral administration.Herein, a facile green synthetic protocol for nanoporous NiFe-LDH/MoOx/BiVO4 had been established via an electrochemical deposition method for enhanced photoelectrochemical cell (PEC) performance. The rational design of nanoporous NiFe-LDH/MoOx/BiVO4 played a vital role in improving the photocurrent density and achieving 2.7 mA /cm2 at 1.23 VRHE (3.9 - fold higher than BiVO4) with a negative onset potential of 267 mV offset. Moreover, the holes were efficiently consumed for water splitting through the cyclic reaction of NiFe-LDH layer. Thus, the nanoporous NiFe-LDH/MoOx/BiVO4 photoanode dramatically improved bulk charge transfer efficiency and surface charge injection efficiency reaching nearly 50% and 95% at 1.23 VRHE, respectively. In addition, the accumulated charge test proved that Mo oxide had the function of transferring holes. And the highest photovoltage and lowest charge recombination kinetics of composite photoanode also presented that the oxide species of Mo and NiFe-LDH had the properties of a passivation layer which were characterized by OCP (Open Circuit Potential) and IMPS (Intensity Modulated Photocurrent Spectroscopy) test. The excellent photocurrent density and facile layer-by-layer synthesis of NiFe-LDH/MoOx/BiVO4 nanocomposite made it a promising photocatalytic material for practical applications. This newly designed strategy was anticipated to be applied in future promising photoanodes for PEC water splitting.Monodisperse gold-copper nanocubes and AuCu-cuprous sulfide (Cu1.96S) heterodimers were fabricated by a step-wise polyol reduction with the aid of oleylamine and 1-dodecanethiol. The geometric configuration was mediated by simply varying the Cu/Au atomic ratio Au-Cu cubes with sizes of 6.4 and 4.3 nm were yielded at Cu/Au atomic ratios of 1/3 and 1/1, respectively; while AuCu-Cu1.96S heterodimer, consisting of a AuCu cube of 4.6 nm and a Cu1.96S sphere of 6.3 nm was obtained at Cu/Au atomic ratio of 3/1. Detailed structural analysis on the intermediate products, collected at different intervals during the synthesis, revealed that small-sized Au seeds formed at 423 K, followed by the growth of Cu and Cu1.96S crystals at 473 K. Oleylamine coordinated to Au3+ and Cu2+ and thus mediated the particle size; while 1-dodecanethiol bonded to Au3+ and directed the cubic morphology. Excessive Cu2+, at the Cu/Au atomic ratio of 3/1, interacted with 1-dodecanethiol and formed Cu1.96S spherical particle that epitaxially grew over the AuCu cube, resulting in a heterodimer structure. Due to the enriched surficial Cu atoms and their electronic interactions with Au atoms, Au-Cu nanocubes and AuCu-Cu1.96S heterodimers showed pronounced activities for the catalytic reduction of 4-nitrophenol to 4-aminophenol with NaBH4 at 298 K.Magnetoelectric coupling is a key strategy to obtain high-performance microwave absorption materials. Especially for carbon matrix composites, the absorbing capacity can be optimized via the tuning of the graphitization degree and the content ratio of the magnetic and dielectric components. Based on this theory, a simple strategy, consisting of the solvothermal method and annealing in an inert atmosphere, is adopted in this study to combine CoNi magnetic alloys with graphitized carbon into micron-scale composite spherical particles. Additionally, special attention is paid to the correlation among the graphitization degree of carbon matrix, component proportion, and dielectric response ability, so as to achieve a flexible micromorphology design and a tunable microwave absorption performance. When the pyrolysis temperature is offset to the best of 700 ℃, a broadband absorption of 6.61 GHz (reflection loss less then - 10 dB) is achieved at an ultrathin matching thickness of 1.9 mm. Adjusting the carbon content can further optimize the impedance matching and realize a high-intensity absorption with a reflection loss of - 72.7 dB. Our work proposes a useful strategy to realize the effective combination of the magnetic and dielectric loss mechanisms and boost the microwave absorption capacity toward achieving the desired broadband and a high-efficiency absorption performance.Detailed evaluations of the antigen and antibody interaction rate and strength of the immune complex formed are very important for medical and bioanalytical applications. These data are crucial for the development of sensitive and fast immunosensors suitable for continuous measurements. Therefore, combined spectroscopic ellipsometry (SE) and quartz crystal microbalance with dissipation (QCM-D) technique (SE/QCM-D) was used for the evaluation (i)of covalent immobilization of SARS-CoV-2 nucleocapsid protein (SCoV2-N) on QCM-D sensor disc modified by self-assembled monolayer based on 11-mercaptoundecanoic acid and (ii)interaction of immobilized SCoV2-N with specific polyclonal anti-SCoV2-N antibodies followed by immune complex formation process. The results show that the SCoV2-N monolayer is rigid due to the low energy dissipation registered during the QCM-D measurement. In contrast, the anti-SCoV2-N layer produced after interaction with the immobilized SCoV2-N formed a soft and viscous layer. It was determined, that the sparse distribution of SCoV2-N on the surface affected the spatial arrangement of the antibody during the formation of immune complexes.