Characterization of nanoporous gold disks for photothermal light harvesting and light-gated molecular release

Due to photothermal effects, the light-gated, multi-stage release of pre-adsorbed dye molecules from nanoporous gold disk arrays has been demonstrated.

Preparation of BSA-ZnWO4Nanocomposites with Enhanced Adsorptional Photocatalytic Activity for Methylene Blue Degradation

This study explains the effect of adsorption on dye degradation using bovine serum alum and ZnWO4based nanocomposite (BSA-ZnWO4). The synthesis of BSA-ZnWO4was performed by a hydrothermal method involving the encapsulation of ZnWO4with BSA. BSA-ZnWO4was characterized by SEM, TEM, XRD, FTIR, and UV-Vis spectral techniques. The photocatalytic experiments were performed under solar light. The dye removal was investigated under different reaction conditions. The photocatalytic efficiency of solar/BSA-ZnWO4process was higher compared to solar/ZnWO4, dark/BSA-ZnWO4, solar/BSA, dark/ZnWO4, and solar light systems. The simultaneous adsorption and photodegradation process (A + P) was the most efficient process due to rapid destruction of adsorbed dye molecules. BSA-ZnWO4showed superior degradation efficiency and reusability over ZnWO4for MB degradation.

Adsorption and degradation of synthetic dyes on the mycelium of Trametes versicolor

Adsorption and degradation of three synthetic dyes with representative chromophores (azo, anthraquinone and indigo) were investigated on living mycelium of white rot fungus, Trametes versicolor. The maximum adsorption capacity (Qmax) and adsorption affinity (K) of the dead and living fungal mycelia to the three dyes were measured and estimated by using the Langmuir model; Qmax has a range from 50 to 105 mg dye/g dry mycelium and K from 17 to 120 mg dye/L. The adsorbed dye molecules could be degraded by the extracellular and/or intracellular enzymes that were produced by a 10-day old fungal mycelium after the essential nitrogen nutrient (NH4+) had been consumed completely. Fungal mycelium was saturated by the dyes in one hour and its adsorption capacity was regenerated at different rates depending on dye structure and enzymes. Compared to the enzymatic regeneration of dye-saturated living mycelium (8-19 mg dye/g dry mycelium. h), physical desorption of adsorbed dye molecules was consistent ranging from 2-3 mg dye/g dry mycelium. h.