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In this work, Eu2O3/Au/SnO2 ternary nanofibers were prepared via a synergetic approach including electrospinning and calcination. The sensor based on Eu2O3/Au/SnO2 nanofibers exhibited a remarkable response (~65) to 100 ppm acetone at a relatively low operating temperature (200 °C), furthermore, the fast response-recovery kinetics and selective acetone detection had been observed simultaneously. The enhancement of acetone sensing properties can be attributed to the construction of Eu2O3/SnO2 heterostructures and the chemical sensitization of Au nanocatalysts, suggesting a pathway to develop high-efficient acetone sensors for health security.

Chemical vapor deposition copolymerization (CVDCP) of 4-carboxyl-[2,2] paracyclophane (4-carboxyl-PCP) and 4-amino-[2,2] paracyclophane (4-amino-PCP) is carried out. It is shown in FTIR and 13 C NMR spectra of the copolymer that an amide or imide bond is formed during the pyrolysis and the transportation of the pyrolysis products. Partial crosslinking, caused by the amidation or imidation of –COOH and –NH 2 among different chains in the copolymer, is possible during the transportation and deposition process. Compared with poly(carboxyl- p -xylylene-co- p -xylylene) (PPX-Carb), the thermal stability of the copolymer is improved. The crystallinity of the copolymer is reduced which is confirmed by transmittance and XRD results of the copolymer.

The soft magnetic composite of reduced iron particles encapsulated with polysiloxane shell was prepared by hydrolysis–condensation polymerization of tetraethylorthosilicate (TEOS) on the surface of iron particles. The structure, morphology, magnetic properties, and chemical stability of the polysiloxane coated iron particles were studied. The thickness of the shell was about 60 nm according to the results of transmission electron microscopy (TEM) and laser particle size analysis, while the mean diameter of the iron particle was 4.45 μm. The chemical stability of the soft magnetic composites was greatly improved, though its magnetic properties were declined a little. However, encapsulated iron particles are still useful in MR fluids as its magnetic properties are much better than other soft magnetic particles like Fe 3 O 4 , etc.

The multiwalled carbon nanotubes (MWCNT) covalently bonded by polyvinylimidazole (PVI) (MWCNT-b-PVI) were synthesized and both their chemical and aggregated structures were characterized by means of TEM, IR, XRD and SEM measurements. MWCNT-b-PVI showed enhanced chemical stability in many common solvents and enhanced thermal stability. It will supply a new way to synthesize functional materials with new optical, magnetic and electrical properties, combining excellent mechanics, heat-stabilization, optical, electrical, processing and film forming properties of carbon nanotubes and heterocyclic polymer.

Nanoscale azo pigment immobilized on the outer shell of multiwalled carbon nanotubes (MWCNT–AZO) were prepared by modified liquid phase reprecipitation method, and the MWCNT–AZO hybrid was characterized by means of TEM, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV–VIS absorption. The photoconductivity of single-layered photoreceptors, where MWCNT–AZO served as the charge generation material (CGM), was studied by the xerographic photoinduced discharge method. The results indicated that the MWCNT–AZO nano hybrid showed broader and enhanced photosensitivity than MWCNT/bulk azo pigments (AZO) blend or the bulk AZO did, which was interpreted in terms of nanometer size effect of MWCNT–AZO hybrid and charge transfer from AZO nanoparticles to MWCNT.