A novel method,bath smelting process,was developed to treat molybdenite concentrate aiming at the existing problems of traditional process.To understand the dissolving behavior of MoS2 in white matte,the binary phase ...A novel method,bath smelting process,was developed to treat molybdenite concentrate aiming at the existing problems of traditional process.To understand the dissolving behavior of MoS2 in white matte,the binary phase diagram of Cu2S-Mo2S was measured by the cooling curve method.The result shows that this system is a simple binary eutectic with a eutectic temperature of（1117.0±3.0）℃ and a eutectic composition of（1.70±0.20）% MoS2 in mass fraction.When the MoS2 addition exceeds 4.48%,MoS2 and Cu2S can form the ternary compound containing CuMo2S3 or Cu2Mo6S8.In the temperature range of copper smelting,1200-1300℃,molybdenite can dissolve in the cuprous sulfide.At 1200℃,the solubility of molybdenite can reach 14.8%.展开更多
The metallic phase of molybdenum disulfide(M-MoS2)and semiconductor phase of molybdenum disulfide(S-MoS2)was synthesized by hydrothermal method,using cetyltrimethylammonium bromide(CTAB)as a surfactant.The structural ...The metallic phase of molybdenum disulfide(M-MoS2)and semiconductor phase of molybdenum disulfide(S-MoS2)was synthesized by hydrothermal method,using cetyltrimethylammonium bromide(CTAB)as a surfactant.The structural and elemental composition confirmed the formation of M-MoS2 and S-MoS2.From the morphological analysis layered nanosheets with an inter-layered distance of 0.62 nm for M-MoS2 and 0.95 nm for S-MoS2 was observed.Fourier-transform infrared(FT-IR)spectral analysis was used to investigate the existence of CTAB functional group.The peak at 885 cm-1 attributed to the CH3 bond which confirmed the presence of CTAB in the S-MoS2.The anodic and cathodic peak separation(Epp)values of the counter electrode(CE)has showed at 468.28 mV(M-MoS2)and 540.87 mV(S-MoS2).The M-MoS2 thin film shows higher catalytic activity when compared to S-MoS2 due to more active sites and electronic conductivity.The power conversion efficiency of M-MoS2 CE based device exhibits higher efficiency compared to S-MoS2 CE based device.展开更多
Substantial effort has been made to search for electrode materials of Na-ion batteries with high energy/power density. The application of S-saturated zigzag MoS2 nanoribbons （MoSzNRs） for Na-ion batteries has been e...Substantial effort has been made to search for electrode materials of Na-ion batteries with high energy/power density. The application of S-saturated zigzag MoS2 nanoribbons （MoSzNRs） for Na-ion batteries has been explored through density function theory （DFT）. The theoretical maximum specific capacity reaches 386.4 mAh,g t via dou- ble-side and special edge adsorption mode. The electronic structure reveals that there exists charge transfer between Na and MoS2NRs. The diffusion barrier on MoS2NRs （0.17 eV） is much lower than that of bulk MoS2 （1.15 eV）, indicating an excellent diffusion kinetics, in addition, the S-edge in MoS2NRs plays a key role. Firstly, the Mo edge was half saturated by S, which helps to stabilize the MoS2NRs as well as offer more intercalation sites for Na. On the other hand, Na migrates much faster on the S edge route in MoS2NRs. Our computational results show that S-saturated MoSzNRs exhibit a great potential as electrode materials for Na-ion batteries with high performance.展开更多
基金Project(50974137)supported by the National Natural Science Foundation of China
文摘A novel method,bath smelting process,was developed to treat molybdenite concentrate aiming at the existing problems of traditional process.To understand the dissolving behavior of MoS2 in white matte,the binary phase diagram of Cu2S-Mo2S was measured by the cooling curve method.The result shows that this system is a simple binary eutectic with a eutectic temperature of（1117.0±3.0）℃ and a eutectic composition of（1.70±0.20）% MoS2 in mass fraction.When the MoS2 addition exceeds 4.48%,MoS2 and Cu2S can form the ternary compound containing CuMo2S3 or Cu2Mo6S8.In the temperature range of copper smelting,1200-1300℃,molybdenite can dissolve in the cuprous sulfide.At 1200℃,the solubility of molybdenite can reach 14.8%.
文摘The metallic phase of molybdenum disulfide(M-MoS2)and semiconductor phase of molybdenum disulfide(S-MoS2)was synthesized by hydrothermal method,using cetyltrimethylammonium bromide(CTAB)as a surfactant.The structural and elemental composition confirmed the formation of M-MoS2 and S-MoS2.From the morphological analysis layered nanosheets with an inter-layered distance of 0.62 nm for M-MoS2 and 0.95 nm for S-MoS2 was observed.Fourier-transform infrared(FT-IR)spectral analysis was used to investigate the existence of CTAB functional group.The peak at 885 cm-1 attributed to the CH3 bond which confirmed the presence of CTAB in the S-MoS2.The anodic and cathodic peak separation(Epp)values of the counter electrode(CE)has showed at 468.28 mV(M-MoS2)and 540.87 mV(S-MoS2).The M-MoS2 thin film shows higher catalytic activity when compared to S-MoS2 due to more active sites and electronic conductivity.The power conversion efficiency of M-MoS2 CE based device exhibits higher efficiency compared to S-MoS2 CE based device.
文摘Substantial effort has been made to search for electrode materials of Na-ion batteries with high energy/power density. The application of S-saturated zigzag MoS2 nanoribbons （MoSzNRs） for Na-ion batteries has been explored through density function theory （DFT）. The theoretical maximum specific capacity reaches 386.4 mAh,g t via dou- ble-side and special edge adsorption mode. The electronic structure reveals that there exists charge transfer between Na and MoS2NRs. The diffusion barrier on MoS2NRs （0.17 eV） is much lower than that of bulk MoS2 （1.15 eV）, indicating an excellent diffusion kinetics, in addition, the S-edge in MoS2NRs plays a key role. Firstly, the Mo edge was half saturated by S, which helps to stabilize the MoS2NRs as well as offer more intercalation sites for Na. On the other hand, Na migrates much faster on the S edge route in MoS2NRs. Our computational results show that S-saturated MoSzNRs exhibit a great potential as electrode materials for Na-ion batteries with high performance.
