Preparation And Its Properties Of Composite Materials Cobalt, Indium Oxide Nano-graphite

In this paper, the Co(OH)2/In(OH)3nanocomposites and Co(OH)2/In(OH)3/GOnanocomposites are prepared through simple reflux methods. The products arecharacterized by TEM, SEM, XRD, BET, FT-IR, etc., and its morphology and structureare analyzed. Gas sensing properties and electrochemical performance of the twonanocomposites are studied.Co(OH)2/In(OH)3nanocomposites have been synthesized via a simple refluxmethod. The surface of nanomaterials exist uniform mesoporous(2~3nm). The poroushierarchical nanostructures provide natural channels for the effective and fasttransportation of carriers. In addition, Co(OH)2/In(OH)3nanocomposites synthesizeunder the Co(NO3)2·6H2O and In (NO3)3mass ratio of5:1has good gas sensitivity toNOx. Co(OH)2/In(OH)3naocomposites are low detection limit of4.85×10-7, sensitivityis29.8%to9.7×10-5NOx. Also, Co(OH)2/In(OH)3nanocomposite has goodelectrochemical performance and good reversible, electrochemical performance ofCo(OH)2/In(OH)3naocomposites is superior to the pure Co(OH)2.Co(OH)2/In(OH)3/GO nanocomposite was prepared from Co(NO3)2·6H2O、In(NO3)3and GO in reflux methods method. When the Co(NO3)2·6H2O and In (NO3)3mass ratio of5:1, GO is added in an amount of1.012g, Co(OH)2/In(OH)3/GOnanocomposite has good gas sensitivity to NOx. Co(OH)2/In(OH)3nanocomposites areshort response time of6.7s to9.7×10-5NOx, sensitivity is61.3%to9.7×10-5NOx, lowdetection limit of4.85×10-7. Compared to the Co(OH)2/In(OH)3nanocomposites,Co(OH)2/In(OH)3/GO nanocomposites have higher sensitivity, more fast response time,better stebility. Electrochemical performance of Co(OH)2/In(OH)3/GO nanocompositesis superior to the Co(OH)2/In(OH)3nanocomposites, the result of study shows thatadditions of GO increase the composites conducitivity and gas transmission capacity.