| 摘要: | 本研究以在乙二醇(EG)溶液中，藉由聚二甲基二烯丙基氯化銨(PDDA)輔助的自模板法(self-templating route)，而後高溫煅燒的熱處理方式製備了新型的微米棒狀ZnTiO3且雙殼中空(DSH)結構，此外，本研究亦探討了微米棒狀DSH ZnTiO3在室溫下，常光下(visible light)對氨氣氣體感測特性。以掃描電子顯微鏡(SEM)、穿透式電子顯微鏡(TEM)和X射線繞射(XRD)分析微米棒狀DSH ZnTiO3薄膜的形態和組成，並詳細探討其微米棒狀雙層外殼中空結構成形的機制過程。比氨氣感測結果顯示，相較於實心微米棒狀TiO2和微米棒狀DSH ZnTiO3在暗室環境條件下，微米棒狀DSH ZnTiO3在室溫、常光下對氨氣具有更好的感測特性，並且，微米棒狀DSH ZnTiO3在室溫、常光下，對低濃度的氨氣也具有極高的反應特性。
A novel double-shelled hollow (DSH) structure of ZnTiO3 microrods was prepared by self-templating route with the assistance of poly(diallyldimethylammonium chloride) (PDDA) in an ethylene glycol (EG) solution, which was followed by calcining. Moreover, the NH3 gas-sensing properties of the DSH ZnTiO3 microrods were studied at room temperature. The morphology and composition of DSH ZnTiO3 microrods films were analyzed using scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffractometry (XRD). The formation process of double-shelled hollow microrods was discussed in detail. The comparative gas-sensing results revealed that the DSH ZnTiO3 microrods had a higher response to NH3 gas at room temperature than those of the TiO2 solid microrods and DSH ZnTiO3 microrods did in the dark. More importantly, the DSH ZnTiO3 microrods exhibited a strong response to low concentrations of NH3 gas at room temperature. |
