The emission and Fourier transformation infrared spectra of freshly prepared porous silicon(PS) and the silicon wafer were examined. Increasing temperature generally led to a decrease in the emission intensities of the PS samples, however, the freshly prepared sample showed an unusually large and sudden increase in its emission intensity at the specific temperature at which the hydrogen ion conductivity in the silicon wafer increased. The O-H vibrations of the silicon wafer also showed a sudden decrease at the same temperature. These results are consistent with the assumption that the luminescence of fresh PS comes from the carrier-bound exciton in its confined nanostructure.
Ni/MgO 催化剂的一种新类型用大气的高周波的分泌物寒冷血浆被准备。加在催化活动的锻烧方法的常规方法,血浆方法,和血浆的影响被学习,甲烷改过的 CO2 被选择为探查反应。催化剂被 X 光检查描绘衍射(XRD ) ,传播电子显微镜(TEM ) , X 光检查光电子光谱学,和 CO2 规划温度的表面反应技术。结果建议血浆加锻烧方法准备的基于镍的催化剂拥有了一种更小的粒子尺寸和活跃部件,更好低温度的活动和提高的反焦炭能力的更高的分散。分别地, CO2 和 CH4 的变换是 90.70% 和 89.37% ,没有明显的释放,反应在 101.325 kPa 下面持续了 36 h 并且 750 吗??