UC知道有会翻译化学的吗
来源：百度知道 编辑：UC知道 时间：2024/05/29 05:04:23
identify and characterize carbon nanotubes. Specimens for
TEM observation were prepared by ultra-sonicating carbon
nanotubes in alcohol, then dipping a TEM sample grid into
the dispersion. Nitrogen adsorption isotherms of nanotube
samples were measured at 77.5 K by an ASAP 2010
volumetric sorption analyzer (Micromeritics) with addi-
tional options for the micropore analysis. The volume of
adsorbed nitrogen at 77.5 K was measured as a function of
25 the equilibrium pressure over a range from 10 Torr to
the saturation vapor pressure. Prior to adsorption measure-
ments, samples were outgassed under vacuum at 573 K for
3 h. The pore size distributions (PSD) of samples were
obtained by analyzing the isotherm with BJH equation. To
check any significant chemical modification, the raw and conpurified
sample was analyzed by X-ray photoelectron
spectroscopy (XPS), re
carbon nanotubes碳纳米管
micropore analysis微孔分析.
adsorbed nitrogen吸附态氮
saturation vapor pressure饱和蒸汽压
pore size distributions孔径分布
X-ray photoelectron spectrometer X射线光电子能谱
binding energies结合能
Thermo-gravimetric analysis热解重量分析(TGA)
Fe catalyst铁催化剂
external standard外标
Micromeritics比表面积-微孔洞测定仪
容量吸附分析仪volumetric sorption analyzer
透射电子显微学Transmission Electron Microscopy
透射电子显微镜(TEM)用于鉴定和测量碳纳米管。透射电子显微镜观察的样品在乙醇中用超声碳纳米管来制备，然后浸入TEM样品滤网进行分散。纳米管样品在77.5 K时的氮吸附等温线用ASAP-2010型容量吸附分析仪(比表面积-微孔洞测定仪) 测定，还可以用来做微孔分析。77.5 K时吸附态氮的体积测定条件是从10 Torr到饱和蒸汽压的恒压下。吸附测定前，样品在573 K 温度下在真空中烘3小时。样品的孔径分布(PSD)用BJH方程分析其等温线得到。为了检查任何显著的化学变化，样品的粗品和纯化产品分别用用X射线光电子能谱仪(XPS)分析。样品的光电子能谱用PHI5300型带有铝-Ka源的X射线光电子能谱(PE公司)测定。能谱在室温下高真空中得以记录。所有样品的结合能(BE)用碳的结合能作为外标 (284.6 eV)进行矫正。所有数据用Applle Series 3500型热解重量分析仪(TGA)分析。热解重量分析仪用于确定样品中铁催化剂的含量，用CAHN2000型热解重量分析仪用来检测样品以108度/分钟的速率加热到11008度（属于程序升温的，我做过）在空气中氧化损失的重量。外标
传输电子显微镜术(TEM) 使用辨认和描绘碳nanotubes 。标本为TEM 观察由超声波处理的碳nanotubes