Single-atom Zn sites decorated with ZnO clusters by in-situ carbon reduction and limited evaporation for boosting oxygen reduction.

The regulation of electron distribution of single-atom catalysts (SACs) by metal oxide groups is an effective strategy for boosting their intrinsic activity of oxygen reduction reaction (ORR). However, it remains a challenge to precisely control synthesis and achieve high activity of the catalyst. Herein, single-atomic Zn sites decorated with ZnO clusters on porous hollow carbon spheres (Zn/ZnO@NC) was constructed by in-situ carbon reduction and limited evaporation strategy.

Modulating the peroxidase-like activity of Fe single-atom nanozymes via atomic-scale inter-site distance engineering.

Developing single-atom nanozymes (SAzymes) with neighboring metal atom active centers composed of homogeneous metal atoms and precisely regulating the distance of atom pair is still purposeful but challenging. Herein, we report an atomic-scale inter-site distance engineering for rationally designing Fe-SAzymes by regulating the inter-site distance of Fe active centers. The resulting Fe-SAzymes displayed enhanced and tunable peroxidase-like activity and Michaelis-Menten kinetics.

Red-emitting fluorescent probe with excellent water solubility for the in situ monitoring of endogenous HS in wheat under salt and Al stress.

Hydrogen sulfide (HS) is a pivotal signaling molecule in plants and appropriate levels are essential for normal growth. As such the real-time detection of HS in plants is required since it enables timely targeted interventions. However, most fluorescent probes for detecting HS reported to date exhibit fluorescence quenching in aqueous solution thereby significantly constraining their potential for in vivo applications.

DFT and comparative adsorption study of NiO, MnO, and MnNiO nanomaterials for the removal of amaranth dye from synthetic water.

In the current study, NiO nanoparticles, MnO nanoparticles, and MnNiO nanocomposites (Ni-NPs, Mn-NPs and MN-NCs, respectively) were synthesized using a facile hydrothermal method, and their performance in the removal of amaranth (AM) dye from synthetic wastewater was compared. XRD, FTIR spectroscopy, SEM, BET analysis, and TGA were performed to characterize the produced catalysts. The effect of pertinent parameters, including pH, dosage of catalysts, temperature, and shaking speed on the uptake of AM was investigated through batch experiments.

Polyphenol-Based Bicontinuous Porous Spheres Via Amine-Mediated Polymerization-Induced Fusion Assembly.

Bicontinuous porous materials, which possess 3D interconnected network and pore channels facilitating the mass diffusion to the interior of materials, have demonstrated their promising potentials in a large variety of research fields. However, facile construction of such complex and delicate structures is still challenging. Here, an amine-mediated polymerization-induced fusion assembly strategy is reported for synthesizing polyphenol-based bicontinuous porous spheres with various pore structures.

MgO-modified biochar by modifying hydroxyl and amino groups for selective phosphate removal: Insight into phosphate selectivity adsorption mechanism through experimental and theoretical.

Metal oxides-modified biochars have been widely studied as promising adsorbents for removing phosphate from wastewater discharge. Yet, the low adsorption selectivity towards phosphate severely limits its potential in practical applications. In this study, MgO-modified biochar modified by hydroxyl and amino groups (OH/NH@MBC) is developed for selective phosphorus recovery from wastewater.

Single-atom Zn with nitrogen defects on biomimetic 3D carbon nanotubes for bifunctional oxygen electrocatalysis.

Single atoms catalysts (SACs) have promising development in electrocatalytic energy conversion. Nevertheless, rational design SACs with reversible oxygen electrocatalysis still remain challenge. Herein, we synthesized atomically dispersed Zn with N defect on three-dimensional (3D) biomimetic carbon nanotubes by secondary pyrolysis (Zn-N-C-2), which possesses excellent oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) bifunctional catalytic activities.