While under the conditions of pH value being 10,Active Carbon powder doping content of 10mg/ml,the ultraviolet(UV) lamp 300W and irridation time 120 min,the 2,4-dichlorophenol removal rate can achieve 96.75%.
The results show that their magnetic properties are completely different: With the doping content increasing,the magnetization curve of La_(0.7-x)Gd_xSr_(0.3)MnO_3 system exhibits the transi- tion from ferromagnetism to cluster then to antiferromagnetism at low temperature;
Li1+δMxV3-xO8 that is doping material of Li1+δV3O8 of Ti、 Fe、 Ni、 Co four transitional elements was synthesized by tradition high temperature solid reaction. We studied the effects of doping elements and doping amount into Li1+δV3O8 on its electrochemical properties.
Sr optimal doping amount is 0.5,and the methylene blue photodegradation rate irradiated for 3h reaches 91.88% when La0.5Sr0.5FeO3 serves as the photocatalyst,which exceeds 27% when the LaFeO3 as the catalyst.
The experiment illustrated that the sensing temperature zone has been lowered with the doping of ZrO2. When doping amount is 1%, ZrO2-SnO2 thick film has better gas sensitivity toward H2S(β= 5. 2) at working temperature 200 ℃, its response and recover time is shorter than 1 min.
Effect of Zn~(2+) doping amount on the conductance and gas-sensing properties of In_2O_3
When x=0.10,0.12,the system establishes charge ordering(CO) state,AFM/CO states coexist below the transition temperature,and the charge ordering temperature T_(CO) increases with the increase of the doping amount.
In addition, gas-sensing mechanism of the materials was explained with catalytic effect of NiO and ABO_3 oxides. NiO-SnO_2 sensors can be used to detect inflammable gases and selectively detect H_2or C_2h_4OH by changing heating power and doping quantity of NiO.
When ratio of water to alcohol was 1: 0, hydrotherm treatment was kept at 200℃ for 48 h, dopant content was 1%, the best result of photocatalysis degradation is received. The photoactivity degradation efficiency of La-doped TiO_2 was higher than pure TiO_2 by 24%.
A series of investigation were done, which include the relations of the dopant content of Al TiC 0.47 B, the ratio of Al, TiC 0.47 in binder and the sintering temperature with the compressing strength, the abrasion resistance and the cutting property of PCBN.
研究了 Al- Ti C0 .47- B系结合剂掺杂合成的 PCBN的抗压强度、磨耗比、连续切削性能与结合剂的掺杂量 ,Al、Ti C0 .47各自在结合剂中的含量及合成温度诸因素的关系。
The effects of doping content of Ce ions and synthesis temperature on valence control were discussed in detail.
The temperature-dependent dc-conductivity suggests a decrease of the oxygen vacancy density by almost 20 times and a slightly declined activation energy U for oxygen vacancies, upon increasing of the Ca-doping content from 0.0 to 0.2.
However, an optimal doping content exists and is around 50?mol% Ag.
impedance measurements show that the compositions of system have better conductivities in low doping content of Ca2+, but the conductivity goes down from 1.039·10-4 Scm-1 to 1.173·10-5 Scm-1 with increasing the content of Ca2+.
The sum of both occupancy ratios agreed almost well with the doping content.
It is revealed that the intensity of the luminescence associated with the aggregate centers (λmax=508-523 nm) is maximum at an EuOBr content of less than or equal to 0.1 mol % and decreases with an increase in the dopant content.
The intensity of photostimulated luminescence in the CsBr: EuOBr crystals irradiated with x-ray photons is found to increase as the dopant content increases.
It is demonstrated that CsBr: EuOBr crystals at a dopant content in the range 0.3-0.4 mol % can be used as x-ray storage phosphors for visualizing x-ray images with high spatial resolution.
The modification of the temperature dependences of the thermopower coefficient for the Tl2Ba2Ca1 - xYxCu2 - yCoyOz system is investigated as a function of the dopant content.
The photoluminescence spectra of these crystals are studied as a function of the dopant content.