Key Words:GRAPHITIC CARBON NITRIDE; HETEROJUNCTION; EXFOLIATION; CONVERSION; NANOSHEETS
Abstract:Ball milling (BM) is utilized to fabricate a composite photocatalyst composed of g-C3N4 material and ZnPc, which traditionally has been a sensitizer in TiO2 based solar cells yet usually having severe agglomeration problem. X-ray diffraction and FTIR results demonstrate that ZnPc has been immobilized onto g-C3N4 surfaces and that the inter-molecular bonds were also destroyed to a large extent, leading to improved dispersion of ZnPc. Further diffuse reflectance and photoluminescence characterization indicated distinct extended spectral response region at 600-700 nm as well as prohibited carrier recombination of the g-C3N4/ZnPc composite. When utilized as a photocatalyst, the properties of g-C3N4/ZnPc composites in the degradation of RhB were 3.1, 1.8 and 4.3 times higher than those of the pristine, ball-milled pure g-C3N4 and g-C3N4&ZnPc. By adding some scavengers, the main active species involved in the photocatalytic process were identified as center dot O-2. The improved photocatalytic performance could be ascribed to well-matched band gaps between ZnPc and g-C3N4, extended light-responsive range as well as the better ZnPc dispersion upon g-C3N4 surfaces.
Volume:8
Issue:3
Translation or Not:no