Fabrication of g-C3N4/SiO2-Au composite nanofibers with enhanced visible photocatalytic activity
Source abstract
Abstract
Abstract Graphitic carbon nitride (g-C 3 N 4 ) based ternary composite photocatalyst (g-C 3 N 4 /SiO 2 -Au NFs) was prepared using Au nanoparticles (NPs) decorated SiO 2 nanofibers (SiO 2 -Au NFs) as a support by employing a heat treatment with a mixture of urea powder and SiO 2 -Au NFs. The resulting Au NPs with the mean diameter of about 13 nm were evenly dispersed on the g-C 3 N 4 /SiO 2 -Au NFs. In addition, the thin g-C 3 N 4 nano-layers were found to be uniformly grown on the g-C 3 N 4 /SiO 2 -Au NFs as determined by electron microscopy and elemental mapping image analyses. Comparative studies revealed that the g-C 3 N 4 /SiO 2 -Au NFs showed better photocatalytic activity for the degradation of Rhodamine B (RhB) under visible light than g-C 3 N 4 /SiO 2 NFs, which was prepared by the same process. The photocurrent enhancement of the g-C 3 N 4 /SiO 2 -Au NFs also indicated an enhanced separation of photo-induced electron-hole pairs. In addition, both the g-C 3 N 4 /SiO 2 -Au and g-C 3 N 4 /SiO 2 NFs could be easily precipitated and separated, which resulted from their ultra-long one-dimensional nanostructure. Also, the g-C 3 N 4 /SiO 2 -Au NFs exhibited high stability could be reused with little loss of photocatalytic activity after three recycles.
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Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Perovskite Materials and Applications · Covalent Organic Framework Applications
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