Preparation and Photocatalytic Performance of g-C3N4-CdS Heterojunction
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摘要: 以尿素为前驱体,550℃热聚合反应5 h,制备了块状g-C3N4。然后将块状g-C3N4超声剥离得到片状g-C3N4,在g-C3N4纳米片上原位生长CdS (直径约130 nm),从而制备了g-C3N4-CdS异质结。g-C3N4-CdS异质结的吸收边约505 nm处,与g-C3N4(约460 nm)相比具有明显的红移,可吸收更多的可见光。此外,g-C3N4-CdS异质结可降解99%的罗丹明B,具有较高的光催化活性。Abstract: With urea as the precursor, bulk g-C3N4was thermal polymerized at 550℃ for 5 h.The g-C3N4nanosheets were prepared by exfoliation of g-C3N4bulk via ultrasound.Then CdS in-situ growing on g-C3N4nanosheets was realized by hydrothermal method.g-C3N4-CdS heterojunctions exhibit a broad photoabsorption at about 525 nm, revealing an obvious red-shift compared with g-C3N4 (about 460 nm).Furthermore, g-C3N4-CdS heterojunctions can degrade 99% of rhodamine B and possesses high photocatalytic activity.
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Key words:
- visible light /
- carbon nitride /
- cadmium sulfide /
- heterojunction
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