bulk phase
1.The bulk -phase and surface structure of the catalysts were determined by XRD and XPS respectively. The surface basicity and acidity were measured by TPD of CO2,NH3-TPD and IPA conversion reaction.
2.In the course of crystallization, Al atoms of the bulk phase of zeolite migrate gradually to the surface phase and achieve an equilibrium. As the protracting of the crystallization time, NH4+ ions take gradually the place of Na+ ions in solid product, and residual Na+, Na+/(Na++NH4+) =0.45, orients on the strong acid sites of zeolite. Kinetics of the crystallization of ZSM-5 has been studied.
7.Meissner effect measurements have shown that there are two superconducting phases,110 K phase and 85 K phase,in the high Tc oxide Bi2-xPbxSr2Ca2Cu3Oy bulk superconductors,that the volume fraction of 110 K phase is much larger than that of 85 K phase,and that the dia-inagnetic transitions begin at the temperature of about 103 K.
9.The deactivation of LILa 0.5Ti0. 5O2+λ catalysts prepared from LiNO3 is mainly caused by the loss of surface lithium. Inthe course of the coupling reaction the bulk lithium diffuses to the surface, leading to the de-composition of active phase containing lithium and lowering the amount of oxygen vacancies.
10.3. The paper determines the best extraction and separation condition, that is, 3.0mL4.5moL/L H_2SO_4 solution, 2.0mL30% KI solution, 1.0mL0.24% CV solution, complex stable ions add 10mL30% Tween80 solution, the total bulk of fixed system is 25mL, add 6g ammonium, polymer solution was separated two phase.
