Synthesis and characterization of NiS2 nanoparticles ingrained into the sulfur-doped carbon nitride nanosheets for application as efficient photocatalysts

A one-step, simple and low-cost strategy toward synthesis of NiS2/S-doped g-C3N4 (NiS2/CNS) composites was successfully accomplished. The hybrid photocatalyst materials with different amounts of NiS2 nanoparticles (NPs) were successfully in situ synthesized via thermal condensation of a mixture containing thiourea and nickel(II) nitrate. The hybrid materials were characterized by XRD, TEM, FT-IR, BET, XPS, PL and DRS analyses. Interestingly, thiourea showed two very important roles: (1) thiourea not only acted as a precursor to in situ produce the sulphur-doped carbon nitride materials, but also (2) sulphur atmosphere originated from polycondensation of thiourea provided a sulphur source for in situ production of NiS2 nanoparticles as a non-noble metal sulphide on the CNS sheets during the synthesis. The XRD patterns of the CNS exhibited two peaks near 13.1 and 27.4°, corresponding to diffractions from (100) and (002) planes, respectively. The sharp peak at 27.4° was attributed to the interplanar stacking units of aromatic system whereas the weak peak at 13.1° was associated to in-plane structural packing motif

کلیدواژه ها:

Nanoparticles ، Carbon nitride ، Sulfur doping ، NiS2 ، Synthesis