A review on the diverse interactions between microalgae and nanomaterials: Growth variation, photosynthetic performance and toxicity.

Vast improvements in nanotechnology have led to the wide usage of nanomaterials (NMs) in daily products. This study reviews the interactions between NMs and microalgae in terms of impacts on growth and photosynthetic efficiency, and their toxicity on microalgae. All types of NMs such as carbon-based NMs (CNMs), metal oxide-based NMs (MONMs) and noble metal-based NMs (NMNMs) improve microalgal growth and photosynthetic efficiency at low concentration, typically ranging between 1 and 15 mg/L depending on the type of NMs, due to hormetic responses by microalgae.

MOF-deviated zinc-nickel-cobalt ZIF-67 electrode material for high-performance symmetrical coin-shaped supercapacitors.

In this study, an MOF-derived ternary zinc-nickel-cobalt hollow polyhedron (ZNC ZIF-67) is synthesized via a facile and scalable templated method and evaluated as the electrode material for supercapacitors. Several physical methods, including XRD, EDX, SEM, TEM, and HR-TEM, are used to characterize the morphology, structure, and composition of this material, and electrochemical methods, such as cyclic voltammetry, galvanostatic charge and discharge, and electrochemical impedance spectroscopy, are also used to evaluate the electrode performance. The porous polyhedral structure of ZNC ZIF-67 with different shell compositions consisting of interconnected nanoparticles is found to play an important role in increasing the specific surface area of the material.