Constructing Sheet-On-Sheet Structured Graphitic Carbon Nitride/Reduced Graphene Oxide/Layered MnO 2 Ternary Nanocomposite with Outstanding Catalytic Properties on Thermal Decomposition of Ammonium Perchlorate

摘要

We unprecedentedly report that layered MnO 2 nanosheets were in situ formed onto the surface of covalently bonded graphitic carbon nitride/reduced graphene oxide nanocomposite (g-C 3 N 4 /rGO), forming sheet-on-sheet structured two dimension (2D) graphitic carbon nitride/reduced graphene oxide/layered MnO 2 ternary nanocomposite (g-C 3 N 4 /rGO/MnO 2 ) with outstanding catalytic properties on thermal decomposition of ammonium perchlorate (AP). The covalently bonded g-C 3 N 4 /rGO was firstly prepared by the calcination of graphene oxide-guanidine hydrochloride precursor (GO-GndCl), following by its dispersion into the KMnO 4 aqueous solution to construct the g-C 3 N 4 /rGO/MnO 2 ternary nanocomposite. FT-IR, XRD, Raman as well as the XPS results clearly demonstrated the chemical interaction between g-C 3 N 4 , rGO and MnO 2 . TEM and element mapping indicated that layered g-C 3 N 4 /rGO was covered with thin MnO 2 nanosheets. Furthermore, the obtained g-C 3 N 4 /rGO/MnO 2 nanocomposite exhibited promising catalytic capacity on thermal decomposition of AP. Upon addition of 2 wt % g-C 3 N 4 /rGO/MnO 2 ternary nanocomposite as catalyst, the thermal decomposition temperature of AP was largely decreased up by 142.5 ???°C, which was higher than that of pure g-C 3 N 4 , g-C 3 N 4 /rGO and MnO 2 , respectively, demonstrating the synergistic catalysis of the as-prepared nanocomposite.