| 铈掺杂WO3的表征及其光解水催化性能的研究 |
| WO3 Doped with Ce: Characterization and Photocatalytic Properties for Water Splitting |
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| 摘要: 采用固相烧结法制备了掺杂不同量铈的WO3催化材料，并用XRD，XPS，DRS和PL光谱对样品进行了表征，主要考察了铈含量和焙烧温度对WO3的性质及光催化分解水制氧活性的影响，初步探讨了样品的PL光谱与其光催化分解水制氧活性的关系。结果表明，铈的掺杂可以使WO3的光谱响应范围向可见光区拓展。铈的掺杂没有引发新的荧光现象，适量铈的掺杂能够增强催化剂样品的荧光强度。在可见光辐射下进行光催化分解水制氧，于600 ℃处理的掺杂铈为0.05%(wt)的WO3催化剂的催化活性最高，此时催化剂的析氧速率比未掺杂WO3提高了1.5～1.7倍。研究表明，样品的光催化活性与其PL信号强度顺序一致，即PL信号越强，光催化活性越高。 |
| 关键词: 铈掺杂三氧化钨 光催化 水分解 |
| 基金项目: |
| Abstract: WO3 samples doped with different mass fractions of Ce were prepared by the solid-state sintering method and characterized by XRD, XPS, DRS and PL spectroscopy. The effects of Ce dopping amount and calcination temperature on the properties and photocatalytic activity for oxygen evolution were investigated. The relationship between PL spectra and photocatalytic activity for oxygen evolution was discussed. The results showed that the dopping of Ce made the optic response range of WO3 samples expanded to the visual light. The dopping of Ce would not lead to new PL peaks, but an appropriate Ce dopping could increase the PL intensity. WO3 samples doped with 0.05%(wt) Ce calcined at 600 ℃ exhibited excellent photocatalytic activity for water splitting to oxygen under the visible radiation, at which the rate for oxygen evolution of Ce/WO3 was 1.5～1.7 times higher than that of undoped WO3. The results also showed that the photocatalytic activity order of samples was the same as that of their PL intensity i.e. the stronger the PL intensity, the higher the photocatalytic activity. |
| Keywords: Ce-doped tungsten trioxide photocatalysis water decomposition |
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| 摘要点击次数: 1214 |
| 全文下载次数: 1890 |
| 杜俊平,陈启元,赵娟,李洁.铈掺杂WO3的表征及其光解水催化性能的研究[J].无机化学学报,2007,23(6):1005-1010. |
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