Novel cake-like N-doped anatase/rutile mixed phase TiO2 derived from metal-organic frameworks for visible light photocatalysis
Source abstract
Abstract
Novel cake-like N-doped anatase/rutile mixed phase TiO2 (A/R N-TiO2) was successfully prepared through the pyrolysis of metal-organic frameworks MIL-125 and subsequent annealing in ammonia atmosphere. The morphology, structure and photocatalytic performance of A/R N-TiO2 in the degradation of Rhodamine B (RhB) were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, UV–vis absorption spectroscopy and electrochemical impedance spectra, respectively. The results show that the A/R N-TiO2 exhibits excellent photocatalytic performance. By optimizing the annealing temperature in ammonia atmosphere, a maximum RhB degradation rate of 93% under visible light irradiation is achieved. The improved photocatalytic performance is ascribed to the enhanced light absorption as well as the reduced electron-hole pair recombination after the N doping and the presence of stepwise energy levels in anatase and rutile TiO2.
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Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Advanced Nanomaterials in Catalysis · Polyoxometalates: Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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