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Preparation and Properties of porous the Quartet cone ZnO and the rod GdPO_4 nanoparticles

Author: LiuKe
Tutor: BaoJianChun
School: Nanjing Normal University
Course: Physical and chemical
Keywords: Polyethylene glycol ZnO GdPO4 Nanoparticles
CLC: O614.4
Type: Master's thesis
Year: 2007
Downloads: 81
Quote: 0
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Abstract


This thesis to polyethylene glycol (PEG) as a structure directing agent, were the pyramidal ZnO and rod GdPO of of porous Quartet 4 Nanoparticles and nature study, using X-ray diffraction (XRD) X-ray energy dispersive spectroscopy analyzer (EDS), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), UV-visible spectroscopy (UV-vis) Fourier transform infrared spectroscopy (FT-IR), Raman scattering spectrometer, thermal gravimetric analysis (TG) of sample characterization and structural analysis. The main results are as follows: 1. The first time in the polyethylene glycol solution prepared the Quartet Scrippsiella ZnO nanoparticles, particle size of about 65nm. HRTEM showed that the nanoparticle surface pore structure. A preliminary discussion of the growth mechanism of the nanoparticles found the PEG their crystal growth and the formation of the pore structure has a very important role. This novel nanoparticles specific surface area is 43m 2 / g, a specific surface area greater than the same size of the nonporous Quartet tapered ZnO nanoparticles (31m 2 / g ). The nanoparticles for degradation of methyl orange. The nanoparticles in biosensors. Modified DMSO / GC (dimethyl sulfoxide / glassy carbon) electrode with porous tetragonal tapered ZnO nanoparticles and fixed on the cell surface horseradish peroxidase (HRP) is not denatured, can be performed quasi-reversible direct electrochemical reaction , H 2 O 2 restore good electrocatalytic activity, stability and reproducibility. Porous tetragonal tapered ZnO nanoparticles modified GC (Glassy Carbon) electrodes fixed to glucose oxidase (GO x ) in the cell surface without denaturation, quasi-reversible electrochemical reaction directly. GO x -ZnO electrodes can also be used for bio-fuel cell has good application prospects. 2. The got in polyethylene glycol solution system rod, filamentous GdPO 4 nanoparticles. The coryneform GdPO 4 nanoparticles length at 90 ~ 140 nm, about 10nm in diameter, selected area electron diffraction test showed that the nanoparticles are monocrystalline. The the filamentous GdPO 4 nanoparticles in length of about 30 ~ 50nm. Rod-like and filamentous GdPO 4 the optical properties of the nanoparticles are different, and this might be closely related to the crystalline form, shape. The study found that the concentration of PEG and the Gd 3 the coordination role H rod GdPO 4 formation of nanoparticles has important implications.

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CLC: > Mathematical sciences and chemical > Chemistry > Inorganic Chemistry > Metal elements and their compounds > Section Ⅳ group metal elements and their compounds
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