Abstract
The restricted visible light captivation and unwanted prompt recombination of photoinduced carriers remarkably hinder the activity of photocatalysts for the removal of organic pollutants. In this study, a new type heterojunction 1D/2D photocatalyst based on cobalt doped NiS nanorods (NRs) S-g-C3N4 nanosheets (NSs) was effectively fabricated by self-assembly technique, and its photocatalytic performance for methylene blue (MB) degradation and antibacterial activity under visible light were explored. The quick electron transport of S-g-C3N4 NSs and the compatible energy band positions of S-g-C3N4 and 4% Co-NiS NRs synergistic accelerate the separation and transmission of e- and h+ pairs across the Co-NiS/S-g-C3N4 heterointerface. The as-constructed heterostructures were assessed by cutting-edge analytical techniques such as SEM, XRD, EDX, FTIR, TEM, UV–vis, XPS, PL, transient photocurrent and BET. Additionally, this rational design enriches visible-light absorption and demonstrates a high BET surface area. Advantaging from the combing effect of 1D and 2D nanostructures, the 25% Co-NiS/S-g-C3N4 heterostructures achieve a significant photocatalytic MB removal rate of 98%, substantially enriched than that of undoped NiS NRs (32%), 4% Co-NiS NRs (55%) and S-g-C3N4 (29%). Simultaneously, the inherent photo-corrosion feature of S-g-C3N4 was stifled by concurrent coupling with Co-NiS NRs and modifying with Co, which was proved over a stability assessment with 6 repeated experimental results. Antibacterial activity of 25% 1D/2D Co-NiS/S-g-C3N4 nanocomposites (NCs) alongside four bacterial species was explored by irradiation of visible light. Our findings highlight the inordinate distinction of the successful heterointerface coupling of Co-NiS/S-g-C3N4 1D/2D heterojunction as a potential photocatalyst system for boosted photocatalytic removal of MB and decontamination of pathogens.
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•Novel cobalt modified 1D NiS NRs 2D S-g-C3N4 NSs coupled heterojunction photocatalyst was constructed.•The superior visible light-harvesting ability of designed 1D/2D heterojunction.•The photocatalytic organic pollutants degradation activity of Co-NiS/S-g-C3N4 is enlarged 3.34 times.•Rapid charge transportation found over 25% Co-NiS/S-g-C3N4 heterojunction.