Fabrication of Cubic p-n Heterojunction-Like NiO/In₂O₃ Composite Microparticles and Their Enhanced Gas Sensing Characteristics

Figure 6

(a) The response time of pure In₂O₃ and NiO/In₂O₃ materials to 600 ppm methanal gas at different temperatures. (b) The recovery time of pure In₂O₃ and NiO/In₂O₃ materials to 600 ppm methanal gas at different temperatures.

(a)

(b)