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La2O3–CeO2–Fe3O4composite nanofibers (LCF NFs) were fabricated via a facile electrospinning - calcination approach, and evaluated as an adsorbent for defluoridation from aqueous solution under batch mode. The pseudo-second-order (PSO) model described defluoridation characteristics well under 20 and 50 mg/L. F−adsorption under 288.15–308.15 K obeyed the Langmuir adsorption isotherm better with the maximum uptakes of 202.43–229.89 mg/g, respectively. The obtained thermodynamics constants involving Gibbs free energies change (ΔG < 0), enthalpy (ΔH9.90 kJ/mol), and entropy (ΔS56.63 J/mol/K) unveiled that the defluoridation process was spontaneous natural as well as endothermic. After four repeated cycles, the developed LCF11 NFs revealed favorable regeneration ability, indicating that LCF11 NFs are auspicious and stable candidates for defluoridation of wastewater.

The application of scaffolding materials is believed to hold enormous potential for tissue regeneration. Despite the widespread application and rapid advance of several tissue-engineered scaffolds such as natural and synthetic polymer-based scaffolds, they have limited repair capacity due to the difficulties in overcoming the immunogenicity, simulating in-vivo microenvironment, and performing mechanical or biochemical properties similar to native organs/tissues. Fortunately, the emergence of decellularized extracellular matrix (dECM) scaffolds provides an attractive way to overcome these hurdles, which mimic an optimal non-immune environment with native three-dimensional structures and various bioactive components. The consequent cell-seeded construct based on dECM scaffolds, especially stem cell-recellularized construct, is considered an ideal choice for regenerating functional organs/tissues. Herein, we review recent developments in dECM scaffolds and put forward perspectives accordingly, with particular focus on the concept and fabrication of decellularized scaffolds, as well as the application of decellularized scaffolds and their combinations with stem cells (recellularized scaffolds) in tissue engineering, including skin, bone, nerve, heart, along with lung, liver and kidney.