本實驗使用乙二醇(EG)、聚二烯丙基二甲基氯化銨(PDDA)、氯化亞錫(SnCl2) 及2-乙基己酸鈦(TE)並利用一步多元醇法合成針葉狀二氧化錫鈦(TiSnO2)奈米棒混合金屬氧化物作為在室溫下感測H2S氣體的材料。利用掃描電子顯微鏡(SEM)探討合成時間與PDDA濃度對於合成結果的影響，並探討形貌、結構及感測特性，並說明針葉狀TiSnO2奈米棒混合金屬氧化物的生長機制。使用穿透式電子顯微鏡(TEM)、能量色散X射線光譜(EDX)和X光繞射儀(XRD)分析其形貌、相組成及晶體結構。實驗結果顯示，TiSnO2混合金屬氧化物結構形貌的改變與多元醇法的時間與PDDA濃度有關。從比較氣體反應的結果表示針葉狀TiSnO2奈米棒混合金屬氧化物在H2S濃度為1 ppm時具有最高反應的2.45%及最低偵測極限為0.20 ppm，且在室溫下對於1~15 ppm H2S氣體具有良好的線性R2= 0.9865。
Microconifer-like TiSnO2 nanorods mixed metal oxide was synthesized by the one-pot polyol method employing ethylene glycol (EG), poly(diallyldimethylammonium chloride) (PDDA), tin(II) chloride (SnCl2) and titanium (IV)-ethylhexanoate (TE) as the precursors for sensing H2S gas at room temperature. The effects of the polyol duration time and the concentration of capping agent (PDDA) were studied to investigate morphological, structural and gas-sensing properties and to propose the possible growth mechanisms of microconifer-like TiSnO2 nanorods mixed metal oxide using scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive x-ray spectroscopy (EDX) and X-ray diffractometry (XRD). The experimental results indicated that the morphology evolutions of structures of TiSnO2 mixed metal oxide strongly depend on polyol duration time and concentration of PDDA. Comparative gas-sensing results revealed that the microconifer-like TiSnO2 nanorods mixed metal oxide had the highest response (2.45%) at a concentration of H2S of 1 ppm, a low detection limit (0.20 ppm) and good linearity (R2 = 0.9865) over the range of 1–15 ppm of H2S gas at room temperature.
