98%
921
2 minutes
20
A substantial development in nanoscale materials possessing catalytic activities comparable with natural enzymes has been accomplished. Their advantages were owing to the excellent sturdiness in an extreme environment, possibilities of their large-scale production resulting in higher profitability, and easy manipulation for modification. Despite these advantages, the main challenge for artificial enzyme mimetics is the lack of substrate selectivity where natural enzymes flourish. This review addresses this vital problem by introducing substrate selectivity strategies to three classes of artificial enzymes: molecularly imprinted polymers, nanozymes (NZs), and DNAzymes. These rationally designed strategies enhance the substrate selectivity and are discussed and exemplified throughout the review. Various functional mechanisms associated with applying enzyme mimetics in biosensing and bioassays are also given. Eventually, future directives toward enhancing the substrate selectivity of biomimetics and related challenges are discussed and evaluated based on their efficiency and convenience in biosensing and bioassays.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1016/j.cis.2024.103233 | DOI Listing |
Anal Chem
September 2025
Institute of Digitized Medicine and Intelligent Technology, Wenzhou Medical University, Wenzhou 325000, P. R. China.
Surface-enhanced Raman spectroscopy (SERS) has shown potential for early disease diagnosis via urinary metabolomics, but still faces challenges in achieving stable hot spots and processing complex clinical data. In this study, the preparation of chiral gold nanostars with precisely controllable branch size, number, and sharpness was realized by investigating the effects of l-GSH and CTA ( indicates halides) on site occupancy, reduction rate, and selective adsorption on crystal facets. Raman spectroscopic characterization using rhodamine 6G (R6G) as a reporter molecule revealed that nanoparticles with fewer branches, larger branch bases, and smoother surfaces exhibited excellent SERS activity, with an analytical enhancement factor (AEF) of 5.
View Article and Find Full Text PDFInt J Biol Macromol
September 2025
School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China; School of Resources and Civil Engineering, GanNan University of Science and Technology, Ganzhou, 341000, China.
Herein, organic/inorganic multiple adsorption sites were constructed on halloysite to intensify the selective adsorption performance of the adsorbent for Al(III) in rare earth solutions. The adsorption heat behavior and thermodynamics of the composite for different ion systems were investigated using microcalorimetry. The results showed that chitosan formed a mesoporous membrane on the acid-treated calcined halloysite (HalH) substrate through a strong electron interaction between the nitrogen atom of the amino group and the oxygen atom of SiO structure on HalH.
View Article and Find Full Text PDFJ Colloid Interface Sci
September 2025
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650093, China.
Encapsulation of non-noble bimetallic nanoparticles within a zeolite framework can improve the stability and accessibility of active sites, but the single microporous structure and poor metal stability decreased the catalytic performance of the catalyst. Here, 3D hierarchical ZSM-5 zeolite encapsulated NiCo nanoparticles (NiCo@3DHZ5) were synthesized by Bottom-up confined steam-assisted crystallization (SAC) one-pot hydrothermal method and applied to the hydrodeoxygenation of vanillin. A series of characterizations showed that highly stable alloyed NiCo nanoparticles were encapsulated in a framework of 3DHZ5, the strong metal-zeolite interactions resulted in highly dispersed NiCo nano-alloys facilitated hydrogen adsorption and spillover of active hydrogen atoms, and the 3D hierarchical structure promoted oxygenated substrate diffusion, the synergy interaction between the alloy particles confined in the 3DHZ5 pores and the acidic sites on the zeolite surface promoted the selective conversion of vanillin.
View Article and Find Full Text PDFJ Am Chem Soc
September 2025
State Key Laboratory of Chemistry for NBC Hazards Protection, College of Chemistry, Fuzhou University, Fuzhou 350116, P. R. China.
The activation of methane and other gaseous hydrocarbons at low temperature remains a substantial challenge for the chemistry community. Here, we report an anaerobic photosystem based on crystalline borocarbonitride (BCN) supported Fe-O nanoclusters, which can selectively functionalize C-H bonds of methane, ethane, and higher alkanes to value-added organic chemicals at 12 °C. Scanning transmission electron microscopy and X-ray absorption spectroscopy corroborated the ultrafine FeOOH and FeO species in Fe-O clusters, which enhanced the interfacial charge transfer/separation of BCN as well as the chemisorption of methane.
View Article and Find Full Text PDFInorg Chem
September 2025
Yunnan Key Laboratory of Crystalline Porous Organic Functional Materials, College of Chemical and Materials Engineering, Qujing Normal University, Qujing 655011, China.
Sequential assembly of donor-acceptor components at the molecular level within a MOF is an effective strategy to achieve efficient electron-hole separation for enhancing the activity of photocatalysts. Meanwhile, the highly efficient and selective functionalization of tetrahydroisoquinoline (THIQ) under mild conditions remains an urgent demand in both the scientific and industrial communities. This work reports a donor-acceptor MOF photocatalyst () constructed by the coordinated assembly of donor and acceptor components, in which a naphthalene unit serves as an electron donor and a perylenediimide unit as an electron acceptor.
View Article and Find Full Text PDF