Search

Ag/AgCl composite as an alternative visible-light photocatalyst has attracted extensive interests; however, the high charge carrier recombination rate and short-term photocatalytic durability limit their practical application. In the present work, TiO 2 hollow nanofibers (ELTiO 2 ) grafted Ag/AgCl is fabricated via electrospinning-precipitation method. Compared with Ag/AgCl and Ag/AgCl-SGTiO 2 (sol-gel synthetized TiO 2 ), 2.89 and 1.59-fold enhancement in the photodegradation rate toward MO is observed over Ag/AgCl-ELTiO 2 under visible light irradiation. The enhancement of photocatalytic activity is mainly attributed to the higher content of the exposed AgCl {1 1 1} facet, which is beneficial for the separation of photogenerated carriers and accounts for more active sites. Moreover, Ag/AgCl-ELTiO 2 shows better photostability than bare Ag/AgCl. [ABSTRACT FROM AUTHOR]

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]

In present research, Fe-doped brushite bone cements were synthesized. The setting time, microstructure and antibacterial property of samples were investigated. The results showed that the setting time of cements was retarded to about 20 min and 123 min, respectively, as iron doping content increasing from 1 mol% to 5 mol% in β-TCP powder. Moreover, Fe-doped cements had much bigger crystal particles and calcium iron phosphate was identified in them. Furthermore, Fe-doped cements performed well in inhibiting the growth of Staphylococcus aureus and Pseudomonas aeruginosa, and larger inhibition halo was obtained with more iron content. Nevertheless, the Fe-loaded cements were not so sensitive to Escherichia coli as to the other two bacteria. [ABSTRACT FROM AUTHOR]

Abstract: PVC-based carbon nanofibers with graphitic nanoparticles were fabricated by an electrospinning–carbonization technique and characterized by SEM, (HR)TEM and XRD. The hydrogen storage capability of the resultant nanofibers was evaluated using the volumetric method. The results show that the PVC-based carbon nanofibers obtained from the electrospun PVC/NiCl2 nanofibers consist of both amorphous carbon and a well-grown graphite layered sphere with a diameter of 35nm. It is clear that the iodine treatment is essential for retaining a fibrous shape during the carbonization, and Ni is beneficial to the growth of graphitization at low temperatures. The hydrogen storage capacity of the PVC-based carbon nanofibers obtained at 1000°C is 0.30wt%, suggesting that the resultant nanofibers are a potential energy storage material. [Copyright &y& Elsevier]

Abstract: La(III)-doped ZnO/C nanofibers with core–shell structure were prepared by calcination of electrospun PAN(polyacrylonitrile)/La(NO3)3/Zn(Ac)2 composite nanofibers and characterized by XRD, FESEM, (HR)TEM, and EDS respectively. The photocatalytic activity of La(III)-doped ZnO/C nanofibers in the decomposition of RhB under UV–lamp light irradiation was also investigated. The results show that the prepared composite fibers possess a rough surface and flower-like morphology with diameters from 50 to 100nm and exhibit high photocatalytic activity in the decomposition of RhB solution. It is also found that the La(III) doping concentration plays an important role in photocatalytic performance during the degradation reaction of RhB. 2% La(III) is suggested to be the optimum doping dosage. [Copyright &y& Elsevier]

Abstract: Ag/TiO2 nanofibers heterostructure were fabricated by calcination of electrospun PVP/Ti(OiPr)4/AgNO3 composite nanofibers and characterized by XRD, FESEM, EDS, and (HR)TEM. The photocatalytic activity of Ag/TiO2 in the decomposition of parathion was also investigated. It was found that the prepared heterostructure composite included Ag nanoparticles distributed uniformly in the TiO2 nanofibers. Comparing with pure TiO2 nanofibers and Ag nanofibers, Ag/TiO2 heterostructure photocatalyst exhibited enhanced photocatalytic activity under ultraviolet light irradiation in the decomposition of parathion aqueous solution. The content of Ag nanoparticles on TiO2 nanofibers played an important role in photocatalytic performance during the parathion degradation reaction. 4% Ag was found to be the optimum doping dosage. [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]