| Photocatalytic oxidation technology exhibits potential practical applications inenvironment treatment and using of solar energy, and the heart of this technology is thedevelopment of photocatalyst. Bi2WO6is a new photocatalyst, it has much wider responsespectrum and good physical properties, and show great potential power in photochemicalwater splitting and organic pollutant degrading. In this work, Bi2WO6is the researchobject and some primary contents below were studied systemically:1. Bi2WO6nanoparticles were synthesized by hydrothermal method and the productswere characterized by XRD, SEM, UV-vis DRS and BET. Taking precursor pH, reactiontime, reaction temperature and the doping metal as studied objects, the influence ofhydrothermal reaction conditions on crystal structure, morphology, light adsorption andsurface area of Bi2WO6were investigated.2. With the Bi2WO6to be the photocatalyst, the photocatalytic property wasdiscussed according to the degradation of phenol. The influences of operating conditionson degrading were researched, such as illumination intensity, catalyst amount, air flowand initial concentration et al. The results showed that Bi2WO6expressed great catalyticalability on phenol degrading, and the degrading rate was over98%when the reaction timeis90min.3. With the Bi2WO6to be the photocatalyst, dissolving thiophene into normal octaneto be simulative oil, the photocatalytic property on desulfurization was studied. Theinfluences of operating conditions on desulfurization were researched, such asillumination intensity, catalyst amount, air flow and initial concentration et al. The resultsshowed that Bi2WO6exhibited great catalytical ability desulfurization, and thedesulfurization rate was over83%when the reaction time is180min. 4. Reaction mechanism of Bi2WO6and the dynamic experiments were operated. Theresults showed that the photocatalytic degrading on phenol and the desulfurizationreaction all could be described by an apparent first-order reaction. |
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