微乳化法合成奈米氧化鋅晶體之研究

Synthesis of Zinc Oxide Nanocrystal in Microemulsion

游世豪(Chris You)

指導教授 ： 王玉瑞

國立臺北科技大學/工程學院/材料及資源工程系所/碩士(2006年)

摘要

本研究嘗試以微乳化法及煆燒法合成一維形狀之奈米級氧化鋅粉末。首先以乳化法合成一維形狀的奈米級鋅鹽沉澱物，此一前趨物再經過各種溫度及時間之煆燒處理後，可以得到奈米級之等粒狀、片狀、柱狀或一維棒狀氧化鋅。實驗結果顯示鋅鹽沉澱物單純經由煆燒處理後，多形成等粒狀之氧化鋅，無法形成一維形狀的氧化鋅奈米線或奈米柱。將活性碳加入鋅鹽沉澱物再經煆燒，在500℃以上即可形成一維形狀氧化鋅，其生成機制初步研判應為VS機制，即鋅鹽經高溫分解生成氧化鋅、再經活性碳還原成金屬鋅、蒸發、再沉積於坩鍋內壁。

關鍵字

微乳化法 ； 氧化鋅 ； 煆燒 ； 成核

並列摘要

The purpose of this experiment is to synthesize 1-D zinc oxide nanorods using micro-emulsion and calcination. The precursor of nano-sized zinc precipitate was first synthesized using micro-emulsion process. Nano-sized zinc oxide with equi-axial particle form could be synthesized using calcinations, but 1-D zinc oxide was failed to obtain. For producing 1-D zinc oxide nanorods, zinc precipitate mixed with active carbon was calcined, and 1-D zinc oxide was formed at the temperature of above 500℃. The vapor-solid mechanism can be used to interpret the nucleation and crystal growth.

並列關鍵字

zinc oxide ； microemulsion ； calcination ； nucleation

參考文獻

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