Synthesis of WO3 materials with interwoven network structures for high-performance sensors

Tungsten oxide with interwoven network structure was prepared by a simple soakage procedure associated with subsequent sintered treatment, using natural eggshell membranes as the template. The synthesis conditions were further investigated by controlling the concentration of the precursor and gas-sensing properties were surveyed by using H₂S as target gas. The results show that the interwoven network structure helps to improve the gas-sensing properties effectively. More interestingly, the response to H₂S decreased with the increase of the concentration of tungstate precursor. Furthermore, the impact of operating temperature to recovery time was also studied and some plausible mechanisms were proposed.