Q.F. Meng
,
K.R. Liu
,
L. Jiang
,
Q. Han
,
J.S. Chen
,
X.J. Wei
金属学报(英文版)
The nano-crystal composite WO3-TiO2 photocatalyst was prepared by ultrasonic assisted sol-gel process. The e®ects of various factors, such as the crystal form, the
substrates, the pH, the dissolved oxygen and the ultrasonic on the photocatalytic activity were investigated in view of the photodegradation of Rhodamine B. The results
show that the crystal form of WO3-TiO2 film with highest photocatalytic activity is
rutile. The introduction of ultrasonic to the course of preparation can accelerate the
deposit time of the sol and increase the photocatalytic activity signi¯cantly in view of
the highest photodegradation of Rhodamine B being 72.7% in 5 hours. The porous
titanium plate is the most suitable substrate in four kinds of investigated materials.
Meanwhile the smaller the pH and the higher the concentration of the dissolved oxygen
in the solution is, the higher the photodegradation is.
关键词:
ultrasonic
,
null
,
null
,
null
Q. Han
,
J.S. Chen
,
K.R. Liu
金属学报(英文版)
NiSCo catalytic cathodes were obtained by electrodeposition in a typical Watt cellwith addition of NH2 CSNH2 and CoCl2. Using CoCl2 concentration, current density,temperature and pH value as main factors, an orthogonal experiment was designed todetermine the optimum technological conditions according to HER overpotentials. Theoptimum technological conditions were obtained from the minimum HER overpoten-tial -70m V. The corresponding electrochemical parameters (Tafel slope b, exchangecurrent density to) were determined by steady-state polarization curves. The contentof S, Co and its microstructure were measured by EPMA and XRD.
关键词:
NiSCo alloy
,
null
,
null
