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Chemically Robust Cationic Porous Organic Polymer (POP) for Selective Detection and Removal of ReO4- as a Surrogate of Radioactive 99TcO4.
Chemistry
December 2024
IISER Pune, Chemistry, IISER PUNE , HOMIBHABA ROAD, NCL COLONY, 411008, PUNE, INDIA.
The efficient removal of 99TcO4- from alkaline nuclear waste is vital for optimizing nuclear waste management and safeguarding the environment. However, current state-of-the-art sorbent materials are constrained by their inability to simultaneously achieve high alkali resistance, rapid adsorption kinetics, large adsorption capacity, and selectivity. In this study, we synthesized a urea-rich cationic porous organic polymer, IPM-403, which demonstrates exceptional chemical stability, ultrafast kinetics (~92% removal within 30 seconds), high adsorption capacity (664 mg/g), excellent selectivity, along with multiple-cycle recyclability (up to 7 cycles), making it highly promising for the removal of ReO4- (surrogate of 99TcO4-) from nuclear wastewater.
View Article and Find Full Text PDFOverview of chitin dissolution, hydrogel formation and its biomedical applications.
J Biomater Sci Polym Ed
December 2024
Polymeric Biomaterials Lab, School of Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi, India.
Chitin hydrogel and hydrogel-based products are some of the frequently reported biomaterials for biomedical applications. Yet there is a void in understanding chitin's dissolution mechanism and its most suitable solvent system(s). Chitin is a natural polysaccharide polymer which can be dissolved in solvents such as calcium chloride- methanol, sodium hydroxide/urea (NaOH/urea), lithium chloride diacetamide (LiCl/DMAc), ionic liquids and deep eutectic solvents.
View Article and Find Full Text PDFHigh dielectric energy storage properties of chitin matrix composites regulated by SiO.
Int J Biol Macromol
December 2024
Sanya Science and Education Innovation Park, Wuhan University of Technology, Sanya 572024, China; School of Materials Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China; Shenzhen Institute, Wuhan University of Technology, Shenzhen 518000, China. Electronic address:
High-performance polymer-based dielectric materials have attracted much attention in the field of energy storage due to high breakdown field strength and low cost. However, partial polymer-based materials are derived from traditional fossil energy derivatives, which are characterized by non-renewable and low dielectric constants, which are not conducive to the improvement of energy storage. In this paper, dissolved chitin through alkali/urea system is composited with SiO prepared by electrostatic spinning.
View Article and Find Full Text PDFInterfacial crack self-healing by Sporosarcina pasteurii: From medium optimization to spore encapsulation.
Biointerphases
November 2024
State Key Laboratory of Digital Medical Engineering, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
Self-healing cement takes advantage of microbial induced carbonate precipitation (MICP), a meritorious biological process, to achieve automatic healing of cement cracks. In this study, two beneficial factors, optimization of the bacteria culture medium and encapsulation of bacterial spores, were used to improve the MICP efficiency of Sporosarcina pasteurii in self-healing cement. On the one hand, in medium optimization, we compared the growth of Sporosarcina pasteurii fed with two generally used nitrogen sources, e.
View Article and Find Full Text PDFPreparation and Antibacterial Performance Study of CeO/g-CN Nanocomposite Materials.
Molecules
November 2024
School of Material and Chemical Engineering, Zhengzhou University of Light Industry, 136 Kexue Road, Zhengzhou 450002, China.
In response to the challenges of food spoilage and water pollution caused by pathogenic microorganisms, CeO/g-CN nanocomposites were synthesized via one-step calcination using thiourea and urea as precursors. Steady-state photoluminescence (PL) spectroscopy analysis demonstrated that 8 wt% CeO/g-CN exhibited superior electron-hole separation efficiency. Quantitative antimicrobial assays demonstrated that the nanocomposites displayed enhanced bactericidal activity against , , and .
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