Tailored Fabrication Of BiVO₄ Nanofibers And Their Photocatalysistic Activities

Bismuth vanadate（Bi VO₄） has fine chemical stability and non-toxic, with a band gap of Eg≈2.4 e V, which has been considered as a potentially attractive photocatalyst for photodegradation of organic pollutants under visible light irradiation.In this work, we fabricate and optimize the Bi VO₄ nanofibers with different morphology and structure by using the electrospinning technique. First of all, we realize the tailored fabrication of the thoroughly mesoporous nanofibers with adding different DIPA in the precussor solution. Subsequently, through adding the different ratio of PVP with different molecular mass in the precursor solution, the tailored fabrication of Bi VO₄ nanobelts can be realized. For improving the SBET of nanobelts, we realize the tailored fabrication of the thoroughly mesoporous nanobelts with adding different contents of DIPA. The main progresses of this work have been presented as below:（1） By adding PVP, VO（acac）2, Bi（NO3）3·5H2O as the raw materials, the Alcohol, HAc, H2 O as the solvent and the different contents of DIPA in the precursor solution, we realize the tailored fabrication of the thoroughly mesoporous Bi VO₄ nanofibers. The SBET and the degradation rate of the mesoporous nanofibers are are 4 times and 3 times to the conventional nanofibers, suggesting their promising applications as novel and efficient photocatalysts for the degradation of Rh B solution.（2） By adding the different ratio of PVPK30 and PVPK90 in the precursor solution, we realize the tailored fabrication of Bi VO₄ nanobelts. The SBET and the photocatalysis efficiency of Bi VO₄ nanobelts is 1.4 times and 1.7 times to that of the conventional nanofibers and the photocatalysis efficiency, respectively.（3） By adding the different contents of DIPA in the precursor solution, we realize the tailored fabrication of the thoroughly mesoporous Bi VO₄ nanobelts. The SBET and the degradation rate of the mesoporous nanobelts are 2 times and 2.4 times to the conventional nanofibers, respectively.