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Abstract: Electrospun nanofibers of poly (vinyl alcohol) (PVA)/Lanthanum (Ш) chloride (LaCl3) composite were employed to prepare the LaOCl nanofibers by calcination. TG-DSC was used to investigate the thermal property of precursor, while FT-IR, XRD, FESEM and TPD were employed to characterize the derived LaOCl nanofibers. Results indicate that the addition of LaCl3 leads to the formation of fork segments in the structure of electrospun PVA/LaCl3 composite nanofibers, therefore, changing the decomposition behavior of the fibers. Pure LaOCl fibers with a diameter range of 90–220nm can be obtained by calcination of electrospun PVA/LaCl3 composite nanofibers at 700°C for 7h. The resultant LaOCl nanofibers show a good sensing behavior for CO2 gas. [Copyright &y& Elsevier]

Abstract: LaOCl nanotubes were fabricated by calcination of the coaxial electrospun PVP/LaCl3@Oil composite nanofibers, in which oil is the core layer while PVP/LaCl3 forms the shell one respectively. A series of tests such as FTIR, XRD, FESEM, (HR)TEM, EDS, N2 adsorption–desorption and CO2-TPD were conducted to characterize the prepared nanomaterials. XRD and EDS results show that the resultant materials consist of pure tetragonal LaOCl, while FESEM and (HR)TEM images indicate that the materials are nanotubes with a rush surface. The inner diameter and the wall thickness of nanotubes are calculated to be around 200 and 50nm, respectively. The BET surface area of the obtained nanotubes is calculated to be 67.5m2/g. And CO2-TPD experiment shows that the nanotubes possess a high CO2 adsorptive capacity of 0.3352mL/g. It would be used as gas sensing materials. [Copyright &y& Elsevier]