Thin PVA/nickel acetate composite fibres were prepared by using sol-gel processing and electrospinning technique. After calcination of the above precursor fibres, NiO nanofibres with a diameter of 50-150 nm could be ...Thin PVA/nickel acetate composite fibres were prepared by using sol-gel processing and electrospinning technique. After calcination of the above precursor fibres, NiO nanofibres with a diameter of 50-150 nm could be successfully obtained. The fibres were characterized by SEM, FT-IR, WAXD, respectively.展开更多
Thin PVA/cobalt acetate composite fibers were prepared by using sol-gel processing and electrospinning technique. After calcination of the above precursor fibers, Co3O4 nanofibers with a diameter of 50-150 nm could be...Thin PVA/cobalt acetate composite fibers were prepared by using sol-gel processing and electrospinning technique. After calcination of the above precursor fibers, Co3O4 nanofibers with a diameter of 50-150 nm could be successfully obtained. The fibers were characterized by SEM, FT-IR, WAXD, respectively.展开更多
Thin PVA/nickel acetate composite fibers were prepared by using sol-gel processing and electrospinning technique. After the calcination of the above precursor fibers,NiO nanofibres with a diameter of 50—100 nm could ...Thin PVA/nickel acetate composite fibers were prepared by using sol-gel processing and electrospinning technique. After the calcination of the above precursor fibers,NiO nanofibres with a diameter of 50—100 nm could be successfully obtained. The fibers were characterized by TG-DTA, FT-IR,WAXD and SEM respectively. The results showed that the crystalline phase and morphology of NiO fibres were greatly influenced by the calcination temperature. [WT5HZ]展开更多
A thin PVA/FeCl_3 composite fiber was prepared by using sol-gel processing and electrospinning techniques. A nanofiber of α-Fe_2O_3 with the diameter of 50_150 nm was obtained via high temperature calcination of the ...A thin PVA/FeCl_3 composite fiber was prepared by using sol-gel processing and electrospinning techniques. A nanofiber of α-Fe_2O_3 with the diameter of 50_150 nm was obtained via high temperature calcination of the PVA/FeCl_3 composite fiber. The material was characterized by infra-red(IR) spectroscopy, X-ray diffraction(XRD), and scanning electron microscopy(SEM). The results show that the fiber after the calcination at 700 ℃ was a pure α-Fe_2O_3 nanofiber.展开更多
Beads free polyvinyl alcohol(PVA)/NiO nanofibers with an average diameter of 400 nm were successfully prepared through the electrospinning method.NiO nanograins were formed along the axis of the nanofiber due to the c...Beads free polyvinyl alcohol(PVA)/NiO nanofibers with an average diameter of 400 nm were successfully prepared through the electrospinning method.NiO nanograins were formed along the axis of the nanofiber due to the calcination of asspun fibers for 24 h at 450℃ and their presence was confirmed by FESEM.NiO nanograins were characterized by XRD,XPS and FTIR.The characterization results showed the presence of NiO in nanograins and its polycrystalline nature with ionic states.The sensing studies of NiO nanograins were performed towards the pulmonary disease breath markers and they showed better response towards formaldehyde vapour at 350℃.Calcined NiO grains showed a good response towards the 11-1145 ppm of formaldehyde vapour at the operating temperature of 350℃.NiO nanograins also showed quick response time(37 s)and recovery time(14 s)towards 46 ppm of formaldehyde.A sensing mechanism was proposed for the formaldehyde vapour interaction at 350℃ with NiO nanograins.展开更多
文摘Thin PVA/nickel acetate composite fibres were prepared by using sol-gel processing and electrospinning technique. After calcination of the above precursor fibres, NiO nanofibres with a diameter of 50-150 nm could be successfully obtained. The fibres were characterized by SEM, FT-IR, WAXD, respectively.
文摘Thin PVA/cobalt acetate composite fibers were prepared by using sol-gel processing and electrospinning technique. After calcination of the above precursor fibers, Co3O4 nanofibers with a diameter of 50-150 nm could be successfully obtained. The fibers were characterized by SEM, FT-IR, WAXD, respectively.
文摘Thin PVA/nickel acetate composite fibers were prepared by using sol-gel processing and electrospinning technique. After the calcination of the above precursor fibers,NiO nanofibres with a diameter of 50—100 nm could be successfully obtained. The fibers were characterized by TG-DTA, FT-IR,WAXD and SEM respectively. The results showed that the crystalline phase and morphology of NiO fibres were greatly influenced by the calcination temperature. [WT5HZ]
基金Supported by the Natural Science Foundation of Jilin Province(No.2 0 0 2 0 6 13)
文摘A thin PVA/FeCl_3 composite fiber was prepared by using sol-gel processing and electrospinning techniques. A nanofiber of α-Fe_2O_3 with the diameter of 50_150 nm was obtained via high temperature calcination of the PVA/FeCl_3 composite fiber. The material was characterized by infra-red(IR) spectroscopy, X-ray diffraction(XRD), and scanning electron microscopy(SEM). The results show that the fiber after the calcination at 700 ℃ was a pure α-Fe_2O_3 nanofiber.
基金K.R.K thank Council of Scientific and Industrial Research(CSIR)India for the financial support(09/1095/0017/2016-EMRI)the authors extend to thank the SASTRA Deemed to be University for providing the infrastructural facility to carry out the research work.
文摘Beads free polyvinyl alcohol(PVA)/NiO nanofibers with an average diameter of 400 nm were successfully prepared through the electrospinning method.NiO nanograins were formed along the axis of the nanofiber due to the calcination of asspun fibers for 24 h at 450℃ and their presence was confirmed by FESEM.NiO nanograins were characterized by XRD,XPS and FTIR.The characterization results showed the presence of NiO in nanograins and its polycrystalline nature with ionic states.The sensing studies of NiO nanograins were performed towards the pulmonary disease breath markers and they showed better response towards formaldehyde vapour at 350℃.Calcined NiO grains showed a good response towards the 11-1145 ppm of formaldehyde vapour at the operating temperature of 350℃.NiO nanograins also showed quick response time(37 s)and recovery time(14 s)towards 46 ppm of formaldehyde.A sensing mechanism was proposed for the formaldehyde vapour interaction at 350℃ with NiO nanograins.
