The preparation of Fe doped triclinic-hexagonal phase heterojunction WO3 film and its enhanced photocatalytic reduction of Cr (VI)
Source abstract
Abstract
Abstract Hexavalent chromium (Cr (VI)) ion is especially harmful to water sources. Photocatalytic reduction of Cr (VI) is one of the most promising methods to remove it from wastewater. In this paper, Fe doped triclinic-hexagonal phase heterojunction WO3 film was prepared for the first time by a feasible hydrothermal process. The film sample was characterized by XRD, SEM, TEM, XPS, etc. The test results show that doping of Fe makes WO3 film transforming partially from a triclinic to a hexagonal crystal phase. Besides, the as-prepared film was also used to photocatalyticlly reduce the toxic Cr (VI) in wastewater. The reduction rate of Cr (VI) is effectively improved compared with general WO3 film. We propose that the triclinic-hexagonal phase heterojunction can effectively improve the separation of photogenerated electron-hole pairs, thus leading to the enhanced photocatalytic activity. The as prepared film also has high stability even recycled for 5 times.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Gas Sensing Nanomaterials and Sensors · Ga2O3 and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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