Recent progress made in biomaterials and their clinical applications is well known. In the last five decades, great advances have been made in the field of biomaterials, including ceramics, glasses, polymers, composites, glass-ceramics and metal alloys. A variety of bioimplants are currently used in either one of the aforesaid forms. Some of these materials are designed to degrade or to be resorbed inside the body rather than removing the implant after its function is served. Many properties such as mechanical properties, non-toxicity, surface modification, degradation rate, biocompatibility, and corrosion rate and scaffold design are taken into consideration. The current review focuses on state-of-the-art biodegradable bioceramics, polymers, metal alloys and a few implants that employ bioresorbable/biodegradable materials. The essential functions, properties and their critical factors are discussed in detail, in addition to their challenges to be overcome.
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http://dx.doi.org/10.3390/jfb8040044 | DOI Listing |
Phys Chem Chem Phys
January 2025
School of Chemistry & Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China.
The hydrogenation of bicarbonate, a byproduct of CO captured in alkaline solutions, into formic acid (FA) using glycerol (GLY) as a hydrogen source offers a promising carbon-negative strategy for reducing CO emissions. While Pd-based catalysts are effective in this reaction, they often require high temperatures, leading to low FA yield due to strong hydrogen adsorption on Pd surfaces. In this work, metal-organic framework derived N-doped carbon encapsulated CoNi alloy nanoparticles (CoNi@NC) were prepared, acid-leached, and employed as a support to modulate the electronic structure of Pd-based catalysts.
View Article and Find Full Text PDFNano Lett
January 2025
State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, MOE Engineering Research Center of Photoresist Materials, Jiangsu Key Laboratory of Advanced Organic Materials, Tianchang New Materials and Energy Technology Research Center, Institute of Green Chemistry and Engineering, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
The sluggish redox kinetics of polysulfides and the resulting shuttle effect remain significant challenges for the practical utilization of lithium-sulfur (Li-S) batteries. To address the unidirectional catalytic limitations of conventional electrocatalysts, we herein report a binary metal (CoNi) alloy embedded in a carbon matrix on carbon nanofibers (CoNi@C-CNFs) as a highly efficient electrocatalyst to accelerate bidirectional polysulfide conversions. Time-of-flight secondary ion mass spectrometry (TOF-SIMS) reveals a significantly improved catalytic effect of the CoNi alloy toward polysulfide conversions after introducing the Ni component.
View Article and Find Full Text PDFACS Appl Mater Interfaces
January 2025
National Energy Metal Resources and New Materials Key Laboratory, Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Hunan Provincial Key Laboratory of Nonferrous Value-Added Metallurgy, School of Metallurgy and Environment, Central South University, Changsha 410083, P. R. China.
Rechargeable Zn-air batteries (RZABs) are poised for industrial application, yet they require low-cost, high-performance catalysts that efficiently facilitate both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). The pivotal challenge lies in designing multimetal active sites and optimizing the carbon skeleton structure to modulate catalyst activity. In this study, we introduce a novel hierarchical porous carbon-supported FeCoNi bifunctional catalyst, synthesized via a spray combustion method.
View Article and Find Full Text PDFNat Commun
January 2025
School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, Australia.
Regulating favorable assemblies of metallic atoms in the liquid state provides promise for catalyzing various chemical reactions. Expanding the selection of metallic solvents, especially those with unique properties and low cost, enables access to distinctive fluidic atomic structures on the surface of liquid alloys and offers economic feasibility. Here, Sn solvent, as a low-cost commodity, supports unique atomic assemblies at the interface of molten SnInCu, which are highly selective for H synthesis from hydrocarbons.
View Article and Find Full Text PDFBiomed Mater
January 2025
Chemistry, Manipal University Jaipur, Jaipur, Jaipur, 303007, INDIA.
Hydroxyapatite (HAP) nano-coatings on titanium alloys (for example, Ti6Al4V) have been used for prosthetic orthopedic implants in recent decades due to their osseointegration, bioactivity, and biocompatibility. HAP is brittle with low mechanical strength and poor adhesion on metallic surfaces, which limits its durability and bioactivity. Surface modification techniques have alleviated the imperfection of biomaterials by coating the substrate.
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