摘要：
To improve the dispersion of graphene oxide (GO) and form effective synergistic effect between GO and WS2 nanosheets, the layer-by-layer electrostatic assembly method was used to synthesize three-dimensional (3D) reduced graphene oxide/WS2 nanosheet/Mg-doped ZnO nanohybrid (rGOWMZ). The enhancement of photocatalytic activity of a reduced graphene oxide/Mg-doped ZnO composites (rGOMZ) was achieved through introducing WS2 nanoplate, in which the decomposition rate of Rhodamine B (RhB) reached 100% within 5 min. Furthermore, the rGOWMZ hybrids possess better anti-bacterial activity in dark than rGOMZ hybrid. The enhanced sunlight-driven photocatalytic and anti-bacterial activities are mainly attributed to defect and efficient electron-hole separation.
摘要：
Carbon nanotubes/taper zinc oxide composite powdrs were prepared by refluxing using zinc chloride as raw material and ammonia as precipitator. The morphology, structure and optical property of composite powdrs were charactered by scanning electron microscopy (SEM), X-ray diffraction (XRD) and flourescence spectra. The experimental results show that the ultraviolet emission peaks at 354 tun are observed by the combination with carbon nanotubes and taper zinc oxide. Moreover, the intensity of ZnO characteristic peaks are reduced with increasing refluxing time, and the intensity of ultraviolet emission peaks at 354 nm is evidently improved.
作者机构：
[陈传盛] State Key Lab. for Powder Metallurgy, Central South Univ., Changsha 410083, China;[刘天贵; 姚凌江] School of Physics and Microelectronics Sci., Hunan Univ., Changsha 410082, China;[陈小华; 陈传盛] College of Materials Sci. and Eng., Changsha Univ. of Sci. and Technol., Changsha 410076, China
通讯机构：
State Key Lab. for Powder Metallurgy, Central South Univ., China
摘要：
In order to improve optical property of the multi-walled carbon nanotubes (MWNTs), MWNTs were decorated with europium oxide (Eu2O3) nanoparticles by using co-deposition method. The MWNTs/Eu2O3 composites were examined by XRD, scanning electron microscopy, transmission electron microscopy, and VUV-Vis Luminescence spectroscopy and citric acid (CA) molecules were introduced onto the surface of MWNTs. The results show that there are many oxygenated functional groups on the surface of the MWNTs after the treatment of mixture acid, such as carboxy, hydroxl, carbony and amidocyanogen. The results of electron microscopy illuminate that the MWNTs are coated by nano-europium oxide after annealed at 750 degrees C. The MWNTs/Eu2O3 composite emits much strong red light at about 610 nm under UV excitation.
作者机构：
[Chen Xiao-hua] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410076, Peoples R China.;[Chen Xiao-hua; Li Wen-hua; Wang Yan-guo; Xu Long-shan; Yang Zhi; Chen Chuan-sheng] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Peoples R China.
通讯机构：
[Chen Xiao-hua] C;Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410076, Peoples R China.
关键词：
碳纳米管;纳米材料;排列形态;气溶胶
摘要：
A novel aerosol method for the production of alighed carbon nanotubes was presented. Multi-walled carbon nanotubes (MWNTs) with fairly uniform diameters and aligned MWNT bundles were obtained by using solutions of organometallics such as ferrocene in hydrocarbon solvents. A hollow and multi-walled structure was observed with diameter ranging from 15 to 50 nm, leading aspect ratio to be over 200. The quality of the product is dependent on the pyrolysis temperature, carrier gas flow rate and the catalyst precursor concentration. For the sample synthesized at 900 degrees C, G/D is 1.81. G/D of samples obtained at 850 degrees C and 800 degrees C are 1.18 and 0.77, respectively. The inclusion of acetylene to an atomized spray of ferrocene in hexane yield aligned MWNT bundles with a narrow diameter distribution.
摘要：
Cu matrix composites reinforced by carbon nanotubes(CNTs) were prepared. The effect of carbon nanotubes on mechanical and tribological properties of the Cu matrix composites were investigated. The chemical method for coating CNTs was reported. The morphology of the fracture surfaces and worn surface were examined by SEM.The results show that Cu/coated-CNTs composites have higher hardness, much better wear resistance and antifriction properties than those of the reference Cu alloy (Cu-10Sn) and Cu/uncoated-CNTs composite sintered under the same conditions. The optimal mechanical properties of the composites occurred at 2. 25% (mass fraction) of CNTs. The excellent wear resistance and anti-friction properties are attributed to the fiber strengthening effect of CNTs and the effect of the spherical wear debris containing carbon nanotubes on the tribo-surface.
