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Electrical Conductivity and Ammonia Sensing Characteristics of Nanocrystalline Silver Molybdates Synthesized by Solution Chemistry Route

A soft chemical method has been developed for the synthesis of nano-crystalline powders of silver molybdates including Ag6Mo10O33 and Ag2Mo2O7. Electrical conductivity, silver ion transport number and gas sensing characteristics of Ag6Mo10O33 were measured. This compound was found to sense selectively ammonia at 503 K. Above 503 K, it has significant cross sensitivity to petroleum gas (PG). Ag2Mo2O7 showed sensitivity of about 46 % towards 100 vppm of ammonia at 623 K whose detailed results are reported in this paper.