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This is to certify that your paper entitled «In-situ synthesis and characterization of reduced graphene Oxide and sulfonated graphene-polypyrrole nano-composites for use in gas sensor» was indexed with 1 pages, in the CIVILICA citation database, code COI:IRANCC20_510, after evaluation and approval of the referees of the "20th Iranian Chemical Congress held in Davarzan 2018.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above conference and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.