In this paper, Bi2S3 nanorods were successfully synthesized via a facile one-pot hydrothermal method and characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscop...In this paper, Bi2S3 nanorods were successfully synthesized via a facile one-pot hydrothermal method and characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. Then the Bi2S3 nanorods were deposited on Au interdigital electrodes by dip-coating to fabricate photodetectors. The photoresponse properties using Bi2S3 nanorods as a representative system showed a significantly enhanced conductivity and the current-voltage （I-V） characteristic exhibited about ca. 2 orders of magnitude larger response and decay time was than the dark current. The estimated to be -371.66 and 386 ms, respectively, indicating Bi2S3 may be an excellent candidate for high speed and high-sensitivity photoelectrical switches and light sensitive devices.展开更多
In this work, we demonstrate an effective method to improve capacitive performance of NaV6O（15） intrinsically by annealing. NaV6O（15） nanorods（NRs） prepared by a simple annealing treatment exhibit significantly ...In this work, we demonstrate an effective method to improve capacitive performance of NaV6O（15） intrinsically by annealing. NaV6O（15） nanorods（NRs） prepared by a simple annealing treatment exhibit significantly improved electrochemical performance compared with the untreated NaV6O（15） electrode, and yield a high specific capacitance（402.8 F/g at 300 mA/g）. Furthermore, the annealing treated nanorods show excellent rate capability and cycling stability（ca. 80% capacitance retention after 1000 cycles at a scan rate of100 mV/s）. Our results have confirmed that the annealing treatment has great influence on the capacitive performance of NaV6O（15）, which may be attributed to the intrinsic three dimensional（3D） tunneled structures of NaV6O（15）, and NR morphology. These findings may further broaden the application of NaV6O（15）-based materials for high performance supercapacitors（SCs）, aqueous rechargeable lithium batteries and Li-ion capacitors.展开更多
文摘In this paper, Bi2S3 nanorods were successfully synthesized via a facile one-pot hydrothermal method and characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. Then the Bi2S3 nanorods were deposited on Au interdigital electrodes by dip-coating to fabricate photodetectors. The photoresponse properties using Bi2S3 nanorods as a representative system showed a significantly enhanced conductivity and the current-voltage （I-V） characteristic exhibited about ca. 2 orders of magnitude larger response and decay time was than the dark current. The estimated to be -371.66 and 386 ms, respectively, indicating Bi2S3 may be an excellent candidate for high speed and high-sensitivity photoelectrical switches and light sensitive devices.
基金supported by the National Basic Research Program of China (Grant No. 2012CB619302)the Science and Technology Bureau of Wuhan City (No. 2014010101010003)+2 种基金the Key Laboratory of Infrared Imaging Materials and Detectors,Shanghai Institute of Technical Physics,Chinese Academy of Sciences (Grant No. IIMDKFJJ-15-07)the National Natural Science Foundation of China (Grant No. 11574166)the Director Fund of WNLO
文摘In this work, we demonstrate an effective method to improve capacitive performance of NaV6O（15） intrinsically by annealing. NaV6O（15） nanorods（NRs） prepared by a simple annealing treatment exhibit significantly improved electrochemical performance compared with the untreated NaV6O（15） electrode, and yield a high specific capacitance（402.8 F/g at 300 mA/g）. Furthermore, the annealing treated nanorods show excellent rate capability and cycling stability（ca. 80% capacitance retention after 1000 cycles at a scan rate of100 mV/s）. Our results have confirmed that the annealing treatment has great influence on the capacitive performance of NaV6O（15）, which may be attributed to the intrinsic three dimensional（3D） tunneled structures of NaV6O（15）, and NR morphology. These findings may further broaden the application of NaV6O（15）-based materials for high performance supercapacitors（SCs）, aqueous rechargeable lithium batteries and Li-ion capacitors.
