We developed a high-efficiency rotating triboelectric nanogenerator (R-TENG) enhanced polyimide (PI) nanofiber air filter for particulate matter (PM) removal in ambient atmosphere. The PI electrospinning nanofiber film exhibited high removal efficiency for the PM particles that have diameters larger than 0.5 μm. When the R-TENG is connected, the removal efficiency of the filter is enhanced, especially when the particle diameters of the PM are smaller than 100 nm. The highest removal efficiency is 90.6% for particles with a diameter of 33.4 nm and the highest efficiency enhancement reaches 207.8% at the diameter of 76.4 nm where the removal efficiency enhanced from 27.1% to 83.6%. This technology with zero ozone release and low pressure drop offers an approach for air cleaning and haze treatment.

Poly (o-toluidine) (POT), poly (m-toluidine) (PMT) and poly (p-toluidine) (PPT) were chemically oxidized by ammonium persulfate (APS) as both oxidant and dopant through a very simple self-assembly process. The structure characterizations by elemental analysis, XPS and FTIR demonstrated that APS is served as both oxidant and dopant due to the proton acid produced during polymerization, which is proven by the decreasing pH value of the reaction solution along with the increase of polymerization time. Besides, the influences of the alkyl-substitution position on the molecular structure, polymerization process, morphology and electrical properties are also discussed.

A continuous C70 nanowire arrays are prepared using a simple electrophoretic deposition method, composed of two steps: generation of the cluster; and deposition of cluster in the alumina membrane, which is proved to be a practicable technique to fabricate other fullerene low-dimensional nanostructures.