Wenji Zheng

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Multishelled NiO hollow microspheres for high-performance supercapacitors have been prepared and the formation mechanism has been investigated. By using resin microspheres to absorb Ni(2+) and subsequent proper calcinations, the shell numbers, shell spacing and exterior shell structure were facilely controlled via varying synthetic parameters. Particularly,(More)
Interpenetrated networks between graphitic carbon infilling and ultrafine TiO2 nanocrystals with patterned macropores (100-200 nm) were successfully synthesized. Polypyrrole layer was conformably coated on the primary TiO2 nanoparticles (∼8 nm) by a photosensitive reaction and was then transformed into carbon infilling in the interparticle mesopores of the(More)
We report in this Letter that wavelength-tunable photodetectors (PDs) can be fabricated by dye-sensitized TiO2 nanoparticle film. The photoelectric response of the detectors is fast. The photocurrent intensity strongly depends on the absorption wavelength of the dye; thus the on/off ratio as a function of light wavelength can be tuned by absorbing different(More)
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