File Name : figure s1.jpg

Caption : figure s1. ftir spectra of mb, aqs and ic.

File Name : figure s2.jpg

Caption : figure s2. tga curves of (a) mb&mb- rgo, (b) ic&ic- rgo, and (c) aqs&aqs-rgo composite with different mass ratios from room temperature to 800 °c under n2 atmosphere.

File Name : figure s3.jpg

Caption : figure s3. xps survey spectrum c 1s of go.

File Name : figure s4.jpg

Caption : figure s4. xps survey spectrum n 1s of ic-rgo.

File Name : figure s5.jpg

Caption : figure s5. xps survey scan spectrum s 2p of aqs-rgo.

File Name : figure s6.jpg

Caption : figure s6. sem images of rgo deposited on the surface of ides.

File Name : figure s7.jpg

Caption : figure s7. schematic diagram of (a) the preparation of typical graphene-based gas sensors and (b) the home-built gas sensing test system.

File Name : figure s8.jpg

Caption : figure s8. the eds spectra of (a) mb- rgo, (b) ic- rgo and (c) aqs-rgo.

File Name : figure s9.jpg

Caption : figure s9. current versus voltage curves of the blank, mb-rgo, ic-rgo and aqs- rgo sensor.