Chemical solution deposited CdSe particulate film possess nanocrystalline structure and exhibit quantum size effects. By changing the temperature of chemical deposition and subsequent annealing, CdSe particulate films...Chemical solution deposited CdSe particulate film possess nanocrystalline structure and exhibit quantum size effects. By changing the temperature of chemical deposition and subsequent annealing, CdSe particulate films with different particle sizes can be obtained.展开更多
The Photocatalytic characterization of TiO2 supported on active carbon was investigated for photocatalytic decomposition of dichloroacetic acid. It was found that TiO2 / AC exhibited a higher photocatalytic activity t...The Photocatalytic characterization of TiO2 supported on active carbon was investigated for photocatalytic decomposition of dichloroacetic acid. It was found that TiO2 / AC exhibited a higher photocatalytic activity than pure TiO2. The reason is that active carbon acting as powerful adsorbent supports makes high concentration environments of organic pollutant molecules around TiO2 particles.展开更多
Abstract: Transient photocurrents induced by shoft light pulses at lanice-mathed GaAs/Alx.Ga1-x multiple quantum well (MQW) electrodes were studied as a function of electrode potential. Dual exponential photocurrent d...Abstract: Transient photocurrents induced by shoft light pulses at lanice-mathed GaAs/Alx.Ga1-x multiple quantum well (MQW) electrodes were studied as a function of electrode potential. Dual exponential photocurrent decay indents were observed at various potentials. By analysis of the dual exponented decay transients, information on steady state photocurrents (Is). surface collection of photoexcoted mmority cCarriers(GO) and lifetimes of surfaCe states (Ts) was obtained. The kinetic behaviors of photoprocesses at illuminated MQW/electrolyte interface were discussed.展开更多
Nanocrystalline CdTe thin films were prepared by asymmetric rectangular pulse electrodeposition in organic solution at 110 degreesC. STM image shows a porous network morphology constructed by interconnected spherical ...Nanocrystalline CdTe thin films were prepared by asymmetric rectangular pulse electrodeposition in organic solution at 110 degreesC. STM image shows a porous network morphology constructed by interconnected spherical CdTe crystallites with a mean diameter of 4.2 nm. A pronounced size quantization was indicated in the action and absorption spectra. Potentials dependence dual conductive behavior was revealed in the photocurrent-potential (I-V) curves.展开更多
AFM has been utilized to study the surface topography and the local conductivity of nanocrystalline TiO2 films. Improving the local conductivity by Ti(iso-C3H7O)4 treatment is characterized by quantitative analysis o...AFM has been utilized to study the surface topography and the local conductivity of nanocrystalline TiO2 films. Improving the local conductivity by Ti(iso-C3H7O)4 treatment is characterized by quantitative analysis of the simultaneous current image. The mechanism of Ti(iso C3H7O)4 treatment is discussed.展开更多
文摘Chemical solution deposited CdSe particulate film possess nanocrystalline structure and exhibit quantum size effects. By changing the temperature of chemical deposition and subsequent annealing, CdSe particulate films with different particle sizes can be obtained.
基金the National Natural Science Foundation of China (No.29877025).
文摘The Photocatalytic characterization of TiO2 supported on active carbon was investigated for photocatalytic decomposition of dichloroacetic acid. It was found that TiO2 / AC exhibited a higher photocatalytic activity than pure TiO2. The reason is that active carbon acting as powerful adsorbent supports makes high concentration environments of organic pollutant molecules around TiO2 particles.
文摘Abstract: Transient photocurrents induced by shoft light pulses at lanice-mathed GaAs/Alx.Ga1-x multiple quantum well (MQW) electrodes were studied as a function of electrode potential. Dual exponential photocurrent decay indents were observed at various potentials. By analysis of the dual exponented decay transients, information on steady state photocurrents (Is). surface collection of photoexcoted mmority cCarriers(GO) and lifetimes of surfaCe states (Ts) was obtained. The kinetic behaviors of photoprocesses at illuminated MQW/electrolyte interface were discussed.
文摘Nanocrystalline CdTe thin films were prepared by asymmetric rectangular pulse electrodeposition in organic solution at 110 degreesC. STM image shows a porous network morphology constructed by interconnected spherical CdTe crystallites with a mean diameter of 4.2 nm. A pronounced size quantization was indicated in the action and absorption spectra. Potentials dependence dual conductive behavior was revealed in the photocurrent-potential (I-V) curves.
基金This work was supported by National Research Fund for Fundamental Key Project (G2000028205) Innovative Foundation of Chinese Academy of Sciences and the Project of the National Natural Science Foundation of China (29873057). We thank Dr. D.S. Zhang for
文摘AFM has been utilized to study the surface topography and the local conductivity of nanocrystalline TiO2 films. Improving the local conductivity by Ti(iso-C3H7O)4 treatment is characterized by quantitative analysis of the simultaneous current image. The mechanism of Ti(iso C3H7O)4 treatment is discussed.
