Synthesis And Application Of One-dimension Inorganic Nanomaterials

One-dimensional nanomaterials have attracted much attention recently for their novel optical,electrical,magnetic and mechanical properties different from those of bulk or nanoparticles.This kind of substances was convenient for manipulation,which has potential application in numerous areas.The aim of this thesis is to synthesis of ultra-long one-dimension inorganic nanomaterials with excellent electrochemical properties,and the focus of our work were their application in electrochemical.Now let's summary as follows:Carbon nanotubes(CNTs)with the average inner(outer)diameter of 10-20 nm(20-40 nm)and length up to 100s of nanometers were synthesized via Wurtz reaction at 400℃for 12 h,using C₂Cl₆ and Na as reactants.These CNTs,having more defects because of the sp³ bonding raw material of C₂Cl₆,were used as electrode material to detect dopamine(DA)via cyclic voltammetry(CV).The results showed that there existed linear relation between peak currents and DA concentration in the range of 2×l0^-7～2.8×l0^-4mol L^-1.The linear regression equation was expressed as Ip(μA)= 0.089 + 0.134c(μmol L^-1).This CNTs-modified electrode exhibited high sensitivity with detection limit of 1xl0^-7molL^-1.Large-scale,high-purity and uniformβ-AgVO₃ nanoribbon bundles were prepared.These bundles were single-crystalline with length up to hundreds of micrometers.X-ray powder diffraction,scanning electron microscopy,transmission electron microscopy,and high-resolution transmission electron microscopy were employed to characterize the morphology and structure of the as-prepared products.The conductivity of a single nanoribbon was the first report to determined as 2.8x10^-3S cm^-1at room temperature,which was higher than the reported values of silver ionic conductor.Ultra-long Silicon nanowires were synthesized by Oxide-assisted growth method.X-ray powder diffraction,scanning electron microscopy, and high-resolution transmission electron microscopy were employed to characterize the morphology and structure of the as-prepared products. And they were used to modify gold electrode to detect DA via cyclic voltammetry method for the first time.The electrode showed high-sensitivity comparing with bare gold electrode and had potential application in sensors.