Size Effect of Surface Defects Dictates Reactivity for Nitrogen Electrofixation.

Electrocatalytic nitrogen reduction reaction (eNRR) offers a sustainable pathway for ammonia (NH3) production. Defect engineering has emerged as a promising strategy to enhance eNRR activity; however, it can concurrently amplify the competing hydrogen evolution reaction (HER), posing challenges for achieving high selectivity. Herein, VOx with systematically tuned defect sizes was engineered to establish a structure-activity relationship between defect size and eNRR performance.

A novel quantum dot-based ratiometric fluorescence sensor array: For reducing substances detection and Baijiu quality discrimination.

Background: Discriminating the quality of baijiu is critical for fostering the growth of the China baijiu market and safeguarding customers' rights. However, establishing a small-scale and rapid baijiu discriminating sensor assay still remains a challenge.

Results: Here, we first introduced ratiometric fluorescence sensor array for the detection of reducing substances in baijiu to achieve baijiu discrimination.

formed CuSn alloy from multivariate metal-organic frameworks for tunable CO electroreduction.

A molecular ligand separation method based on multivariate metal-organic frameworks (MOF) is developed to precisely regulate CuSn alloy for tuning the selectivity of HCOOH and CO in CO reduction. With this method, the agglomeration and heterogeneous nucleations of metals are effectively inhibited during the electrochemical transformation of CuSn-MOFs into highly pure CuSn alloy. The low Sn content favors CO production, while the high Sn concentration facilitates HCOOH formation.

Toxic effects and mechanistic insights of cadmium telluride quantum dots on the homeostasis and regeneration in planarians.

The widespread application of quantum dots (QDs) in recent years has raised concerns about potential environmental and human health risks. Although the toxicity of cadmium telluride quantum dots (CdTe QDs) has been partially studied, their effects on stem cells, tissue regeneration, neurodevelopment, and neurobehavioral toxicity remain unclear. This study aimed to investigate the combined toxic effects and mechanisms of CdTe QDs on planarians at the individual, tissue, cellular, and molecular levels.

Optimized synergistic effects in sweat glucose detection with a Pt single-atom catalyst on NiO for fingertip wearable biosensors.

For the approximately 8.5 % of the global population living with diabetes, puncture-based glucose testing is often an unpleasant experience. Non-invasive sweat glucose testing not only reduces pain and the risk of wound infection but also offers a more suitable method for real-time glucose monitoring.

Simultaneous detection of tyrosine and uric acid in sweat using CoWO@CNT with a hydrogel modified electrochemical biosensor.

The levels of uric acid (UA) and tyrosine (Tyr) in sweat reflect a person's overall health. However, simultaneously identifying several components in sweat remains challenging. Here, we achieve simultaneous detection of UA and Tyr by synthesizing CoWO@CNT in a single step using a hydrothermal method.

Rapid, portable, and sensitive detection of CaMV35S by RPA-CRISPR/Cas12a-G4 colorimetric assays with high accuracy deep learning object recognition and classification.

Fast, sensitive, and portable detection of genetic modification contributes to agricultural security and food safety. Here, we developed RPA-CRISPR/Cas12a-G-quadruplex colorimetric assays that can combine with intelligent recognition by deep learning algorithms to achieve sensitive, rapid, and portable detection of the CaMV35S promoter. When the crRNA-Cas12a complex recognizes the RPA amplification product, Cas12 cleaves the G-quadruplex, causing the G4-Hemin complex to lose its peroxide mimetic enzyme function and be unable to catalyze the conversion of ABTS to ABTS, allowing CaMV35S concentration to be determined based on ABTS absorbance.

Biomimetic Design of a Dynamic M-O-V Electron Bridge for Enhanced Nitrogen Electroreduction.

Electrochemical nitrogen reduction reaction (eNRR) offers a sustainable route for ammonia synthesis; however, current electrocatalysts are limited in achieving optimal performance within narrow potential windows. Herein, inspired by the heliotropism of sunflowers, we present a biomimetic design of Ru-VOH electrocatalyst, featuring a dynamic Ru-O-V electron bridge for eNRR within a wide potential range. spectroscopy and theoretical investigations unravel the fact that the electrons are donated from Ru to V at lower overpotentials and retrieved at higher overpotentials, maintaining a delicate balance between N activation and proton hydrogenation.

A novel design of Cu(I) active site on the metal-organic framework for exploring the structural transformation of Fenton-like catalysts through in situ "capturing" OH.

The mutual transformation of reactive oxygen species may affect the structural transformation of catalysts during the Fenton-like processes. Its in-depth understanding is essential to achieve high catalytic activity and stability. In this study, a novel design of Cu(I) active sites based on the metal-organic framework (MOF) is proposed to "capture" OH produced via Fenton-like processes and re-coordinate the oxidized Cu sites.

HO activation by two-dimensional metal-organic frameworks with different metal nodes for micropollutants degradation: Metal dependence of boosting reactive oxygen species generation.

The existence of organic micropollutants (OPMs) in water poses a considerable threat to the environment. A centralized approach towards pollutants abatement has dominated over the recent decades wherein heterogeneous Fenton-like based advanced oxidation processes can be a promising technology. The application of engineered nanomaterials offers more opportunities to enhance their catalyst properties.

Electrocatalytical oxidation of arsenite by reduced graphene oxide via in-situ electrocatalytic generation of HO.

Preoxidation of As(III) to As(V) is required for the efficient removal of total arsenic in the treatment of wastewater. In this work, the electro-Fenton oxidation of As(III) with a high efficiency was successfully achieved by using the system of the stainless steel net (SSN) coating with reduced graphene oxide (RGO@SSN) as the cathode and stainless steel net (SSN) as the sacrificial anode. The RGO@SSN was synthesized by electrophoretic deposition-annealing method.