Hydrogen sensor based on palladium nanodendrite/graphene nanocomposite and method of fabricating the same

摘要

the present invention is palladium nano dendrite-graphene nano-composite based on the hydrogen sensor and relates to a manufacturing method, the palladium (Pd) nano dendrites (porous Pd nanospheres) in the present invention is Pd precursor salt was synthesized by a chemical route in the step 1 by the quick easy reaction processes. 60 ~ 70nm colloidal Pd Castle a very uniform with the size of the dendrite is then Pd dendrite yes in step 1 by the reaction of hydrazine (reducing agent) So as to form a pin-pin hybrid were simply reduced to flake. Pd dendrite yes resistance sensor used with the pins had a range that can be detected with good linearity from 1000ppm at room temperature for up to 1ppm. Further, hydrogen (H ₂ ) sensor is a low-hydrogen (H ₂ ) reaction with a clear difference even in a concentration range of from 1ppm at low working temperatures of the room temperature below 50 10ppm It can show. Pd Yes when contrasted with our previous invention for the pin complex / hybrid H2 detects based on, and new Pd dendrite graphene hybrid except for such a weakness that lowering the reaction (from 100 ) high temperature, higher the response values, and has a good repeatability, fast response / recovery time, and some of the benefits of less hysteresis at low temperature operation. Hydrogen (H ₂ ) calculated from the results of these advantages is the high porosity of the sensing and dendritic Pd nanostructures from a high surface area compared to volume ratio. ;