Abstract:
Bismuth sulphide (Bi
2S
3)/g-C
3N
4 composites were synthesized by an ionothermal method under defferent reaction temperature using Bi(NO
3)
3 as the bismuth source, thiourea as a sulphur source, and g-C
3N
4 as carrier in an ionic liquids reaction medium. The prepared samples were characterized by XRD, SEM, UV-vis spectrum and PL spectrum respectively. XRD results indicated that the prepared samples were only Bi
2S
3 phase and g-C
3N
4 phase in the Bi
2S
3/g-C
3N
4 composites. SEM results indicated that the Bi
2S
3 grains are nanorods. The UV-vis spectrum result indicated that the prepared samples exhibited stronger absorption over the entire visible light range. Especially when the reaction temperature was beyond 160℃, absorbance values of the prepared samples were beyond 0.5 over the entire visible light range. The PL spectrum result indicated that the fluorescence intensity of the prepared composites was obviously weakened with reaction temperature increasing. At the same time, the thermal conductivity of the prepared samples was tested. The result indicated that the thermal conductivity of the Bi
2S
3/g-C
3N
4 composites was increased with reaction temperature increasing.