研究目的

Investigating the therapeutic effects of a specific herbal medicine on a particular disease.

研究成果

One-step hydrothermal-synthesized rGO/WS2 composite indicate much improved response to the low concentrations of ammonia from 10-50 ppm at room temperature compared with those of each component of rGO and WS2 based sensors. The enhanced sensitivity has been attributed to the unique properties contributed from both rGO and WS2 in the synthesized hybrid. The enhancement in the NH3 adsorption was due to the more functional groups in rGO nanosheets and the extra acid centers introduced by doping of the WS2 nanoflakes. The sensor also displays an excellent selectivity to several possible interferents such as NO2, alcohols, acetone and benzene, and pretty good long term stability.

研究不足

The recovery time is still too long. The reason may lie in that after a strong adsorption to the surface of rGO and WS2, it became difficult to be desorbed once the NH3 was removed from the testing chamber.