Narrating the basic knowledge of nanofibrous filters. The mechanical-dependent and electrostatic-dependent nanofibrous filters were summarized according to their mechanical adsorption and electrostatic adsorption to the nanoparticles, respectively, which will help to understand and design better performance nanofibrous filters.
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IMAGE: Schematic representation of the dependence of the main proton transport pathway in polymer thin films on the carboxylic acid group concentration. view more
Credit: Yuki Nagao
Ishikawa, Japan - Protons subatomic particles with a positive electric charge are one of the first particles to have formed after the universe began and are a constituent of every atom today out there. The movement of protons plays a key role in energy conversion processes, such as photosynthesis and respiration, in biological systems. In addition, proton conduction is an important factor for hydrogen fuel cells, which are often touted as the ideal clean energy source for the next generation.
Developing a novel and convenient method to prepare dual emission nitrogen-doped carbon dots, which can be used as a ratiometric fluorescent probe for detecting dopamine based on the variation of the ratio (I595nm/I435nm).
Developing new ultrathin metal electrodes has allowed researchers to create semitransparent perovskite solar cells that are highly efficient and can be coupled with traditional silicon cells to greatly boost the performance of both devices, said an international team of scientists. The research represents a step toward developing completely transparent solar cells.
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IMAGE: Synthesis diagram of Ni5.2WCu2.2 and a Ni5.2WCu2.2 electrode of size 3×10cm2 obtained in this way. view more
Credit: QIN Shuai et al.
As the cleanest renewable energy, hydrogen energy has attracted special attention in the research. Yet the commercialization of traditional proton exchange membrane fuel cells (PEMFCs), which consume hydrogen and produce electricity, is seriously restricted due to the chemical reaction of PEMFCs cathode largely relies on expensive platinum-based catalysts.
A solution is to change the acidic electrolyte of PEMFCs to alkaline. Such fuel cells are called anion exchange membrane fuel cells (AEMFCs), and they allow for the use of cheaper metal elements like Co, Ni or Mn to design electrocatalysts.