由集塵灰及粗氧化鋅以碳熱還原法合成一維氧化鋅

Preparation of 1-D ZnO nanotubes from crude ZnO and EAFD by Carbothermic Reduction Method

劉書銜(Shu-hsien Liu)

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

目前世界各國處理集塵灰仍以火（乾）法中之碳熱還原回收鋅為主流，因為其具有處理量大及成本低等優點。目前大部份集塵灰資源化技術都是將鋅還原、蒸發再氧化，製造成粗氧化鋅，再進一步冶煉成鋅金屬。本研究擬以碳熱還原法回收鋅，並以溫度、氣氛以及不同之基板為主要實驗變數，直接將鋅製成奈米至微米級細微粉體之金屬鋅或氧化鋅。此外，由鋼聯產出之半成品粗氧化鋅也將進一步以本法加以精煉純化。
最後在氬氣：氧氣等於1：0的氣氛下，以有鍍金之矽基板可以成功合成出高附加價值之一維氧化鋅。另外在實驗末端以噴霧器合成之實驗則是可以合成出晶型完美而粒度分布在80nm-2μm 之氧化鋅。

關鍵字

碳熱還原 ； 氣相沉積 ； 煉鋼集塵灰 ； 一維氧化鋅

並列摘要

The treatment and recovery of EAFD have been intensively studied and many of the recycling and recovery processes have been commercialized in the past decades. Most of the processes focused on the recovery of zinc oxide and the direct-reducted iron using the carbon-thermal reduction process. Zinc Oxide has been widely used in various aspect of industrial application, especially in the form of ZnO nanorods, which hold a promising key to the world of nanotechnology. With its wide-band gap (3.37 eV), large excitonic binding energy (60 meV) and high breakdown strength, ZnO nanorods possess several advantages for use in electronic and photonic devices. In this work, 1-D ZnO nanotubes were synthesized by carbothermal reduction method with vapor-liquid-solid (VLS), and vapor-solid (VS) mechanism. The effects of temperature, atmosphere, and surface treatment of substrate on the formation of ZnO, were investigated.

並列關鍵字

electric arc furnace ； 1-D ZnO nanotubes ； vapor-liquid-solid (VLS) ； vapor-solid (VS) mechanism

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