![]() The present study demonstrates that enhanced PCO of NO with photocatalyst nanofiber under solar light irradiation can be optimally realized. The activity of the nanofiber photocatalysts was improved by increasing the irradiation area and residence time and optimized at relative humidity of 50%.Conclusion % of Zn to the TiO2 photocatalyst, and this optimal amount of added dopant was in accord with the X-ray photoelectron spectroscopy measurement. The efficiency of PCO under irradiation from full spectrum of wave lengths was optimized by adding 0.10 wt. The TiO2/ZnO composite nanofiber photocatalyst has lower band-gap than TiO2 nanofibers, which favors photo-electron generation, because introduction of ZnO causes charge imbalance and formation of the unsaturated chemical bonds on the surface, increasing the catalyst surface oxygen vacancy and generation of the oxidation radicals, thereby increasing PCO. ![]() The nanopores formed between nano-crystallites of nanofibers were found to increase both adsorption and activity of the photocatalyst. There is a demand to develop nano-photocatalyst that has better performance as compared to existing TiO2 nanoparticles that are difficult to separate and reuse.ResultsBoth TiO2 and TiO2/ZnO composite nanofibers prepared using a sol–gel assisted electrospinning revealed higher photocatalytic oxidation (PCO) of NO than TiO2 nanoparticles of 100 nm.
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