Amorphous SiO2 with no peaks of ZnO wurtzite structure was formed.
ZnO–SiO2 has a large surface area of 462xA0;m2/g.
ZnO–SiO2 was employed for the detection of phenyl hydrazine as chemical sensor.
The sensitivity and the limit of detection were 10.80xA0;μAxA0;cm−xA0;2xA0;mM−xA0;1 and 1.42xA0;μM.
The modified ZnO–SiO2 nanocomposite sensor electrode was extremely stable.