A cotton fabric/titanium dioxide-nanocellulose (TiO ₂ -Cot.) flexible and recyclable composite material with highly photocatalytic degradation of dyes and antibacterial properties was synthesized.

In this paper, we report an antibacterial, recyclable nanocellulose–titanium dioxide/polyester nonwoven fabric (NC-TiO₂/PET) composite for the highly efficient photocatalytic degradation of dyes. The NC-TiO₂ was loaded onto the surface of flexible PET nonwoven fabric through a simple swelling and dipping method. The NC-TiO₂ in the particle size range of ~10 nm were uniformly attached to the surface of the PET fibers. The NC-TiO₂/PET composite has the ability to achieve the stable photocatalytic degradation of dyes and presents antibacterial properties. The degradation rates to methylene blue (MB) and acid red (AR) of the NC-TiO₂/PET composite reached 90.02% and 91.14%, respectively, and the inhibition rate of Escherichia coli was >95%. After several rounds of cyclic testing, the photocatalytic performance, antibacterial performance, and mechanical stability of the NC-TiO₂/PET composite remained robust.

Cellulose-based hierarchical porous beads exhibit significant application potential in adsorption and separation systems due to their degradation and biocompatibility. However, the current fabrications of cellulose beads show poor mechanical properties and a difficult-to-regulate hierarchical porous structure, reducing their lifespan of use and limiting their application in fine separation. Here, we reported the facile creep–drop method to prepare cellulose beads that enabled systemic regulation of the macro-size, micropore structures, and mechanical properties by optimizing injection nozzle diameter, the composition of the coagulation bath, the temperature of the coagulation bath, and cellulose concentration. Notably, during the molding process, the H₂SO₄-Na₂SO₄ composite solidification bath endowed cellulose beads with a dense shell layer and a loose core layer, which achieved the integration of mechanical properties and high porosity. The cellulose beads exhibited high porosity (93.38–96.18%) and high sphericity (86.78–94.44%) by modulating the shell thickness of the cellulose beads. In particular, the cellulose beads exhibited excellent mechanical properties with a high compressive strength of 544.24 kPa at a 5% cellulose concentration. It is expected that these cellulose beads with tunable microstructures can realize their potential for applications in the fields of wastewater treatment, chemical engineering, bioengineering, medicine, and pharmaceuticals.

GMTZP hydrogel integrates GelMA, Zn-coordinated tea polyphenols, and polydopamine for multifunctional wound care, exhibiting antioxidant, hemostatic, cytocompatible, and NIR-triggered photothermal antibacterial properties.