Mechanistic study of visible light driven photocatalytic degradation of clofibric acid using Fe-based metal organic frameworks (MOFs).

Although a series of past studies proved the potential usage of Fe-based metal-organic frameworks (MOFs) as photocatalysts, there remains a knowledge gap of the photocatalytic mechanism stemming from the challenge to separate the simultaneous sorption and photocatalytic degradation. Thus, this article aimed to suggest a novel approach by desorbing target molecules during photocatalysis to excavate the underlying mechanisms of sorption and photocatalytic degradation. In this study, two Fe-based MOFs, MIL-101(Fe) and MIL-101(Fe)-NH, were selected to remove clofibric acid under visible light irradiation.

Nanobubble Reactivity: Evaluating Hydroxyl Radical Generation (or Lack Thereof) under Ambient Conditions.

Nanobubble (NB) generation of reactive oxygen species (ROS), especially hydroxyl radical (OH), has been controversial. In this work, we extensively characterize NBs in solution, with a focus on ROS generation (as OH), through a number of methods including degradation of OH-specific target compounds, electron paramagnetic resonance (EPR), and a fluorescence-based indicator. Generated NBs exhibit consistent physical characteristics (size, surface potential, and concentration) when compared with previous studies.

Effects of MoS Layer Thickness on Its Photochemically Driven Oxidative Dissolution.

The distinctive optical and electronic properties of two-dimensional (2D) molybdenum disulfide (MoS) make it a promising photocatalyst and photothermal agent in aqueous applications. In terms of environmental stability, MoS has been considered insoluble, but 2D MoS nanosheets can be susceptible to dissolution, owing to their large surface areas and highly accessible reactive sites, including defects at the basal plane and edge sites. Under light illumination, the dissolution of 2D MoS nanosheets can be further accelerated by their photochemical reactivity.

Distribution and in situ proliferation patterns of intravenously injected immortalized human neural stem-like cells in rats with focal cerebral ischemia.

Neural stem cells are considered as a candidate for cell replacement therapy in various neurological diseases. To investigate whether human neural stem cells can migrate into the adult ischemic rat brain, we transplanted immortalized human neural 'tem-like' cells intravenously 24 h after focal cerebral ischemia. The intravenously injected human neural stem-like cells were found around the infarcted area, differentiated into neurons and astrocytes in the lesioned areas, and survive up to 56 days after transplantation.