溶膠-凝膠法合成摻雜鈦介孔二氧化錫及其性質研究

Characterization and properties of Ti-doped mesoporous SnO2 synthesized by sol-gel process

陳俊誠(Chun-cheng Chen)

指導教授 ： 張莉毓

國立屏東科技大學/工學院/機械工程系所/碩士(2015年)

https://doi.org/10.6346/NPUST.2015.00242

摘要

二氧化錫為n 型之寬能階(wide band gap)半導體材料，具有優異的導電及透光性質，且有著相當廣泛的應用潛力，如作為光觸媒、透明導電氧化物、氣體檢測器、太陽能電池等；而添加二氧化鈦可以使光觸媒及氣體檢測器反應較好。
　　本研究以三嵌段兩性共聚物(F127)作為模板，以硝酸錫為前驅物，摻雜不同比例二氧化鈦，本實驗使用溶膠-凝膠法，經由450℃、500℃及550℃煆燒後而生成介孔二氧化錫，再經由X-ray繞射分析(XRD)、掃描式電子顯微鏡(SEM)、穿透式電子顯微鏡(TEM)及光催化活性測試等各種分析，探討不同比例及煆燒溫度對於二氧化錫性質的影響。
　　由XRD分析得知，純二氧化錫及摻雜二氧化鈦之二氧化錫均為正方金紅石結構，由XRD計算晶粒大小，可發現藉由二氧化鈦的摻雜會抑制二氧化錫的晶粒成長。當TiO2/SnO2 為0.3/0.7時，經煆燒550℃後，晶粒大小為15.3 nm。可由TEM得知，二氧化錫晶粒大小及結晶形貌，並藉由EDS成份分析得知晶粒成份。最後光催化活性測試得知，當TiO2/SnO2 為0.3/0.7時，經煆燒550℃後，可以讓二氧化錫催化劑催化效率變好。

關鍵字

溶膠-凝膠法 ； 介孔二氧化錫 ； 摻雜 ； 三嵌段兩性共聚物

並列摘要

SnO2 is a semiconductor material of n-type wide band gap, it has good conductivity and transparency and has been extensively investigated in various applications including photocatalysts, transparent conductive oxide, gas sensor and solar cell. It is found that the TiO2 doping can enhance the reactivity of photocatalysts and gas sensor.
　　In this study, a triblock copolymer (F127) and cerium nitrate were used respectively as a template and as a precursor and doped with TiO2 at different ratios. This experiment employed the sol-gel process, in which mesoporous SnO2 was prepared by calcination at 450℃, 500℃ and 550℃. Then, the effects of doping and calcination temperatures on the properties of SnO2 were examined using X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and photocatalyst activity testing.
　　The XRD analysis revealed that both pure SnO2 and TiO2 doped SnO2 had tetragonal rutile crystal structures. The results of grain size calculations in the XRD further indicated that doping with TiO2 could suppress the growth of SnO2 grains. When TiO2/SnO2 is 0.3/0.7, after calcined at 550℃, the grain size is 15.3 nm. The TEM analysis and EDS composition analysis showed that the size of SnO2 grains and crystal topography as well as grain composition. Finally, the photocatalyst activity testing revealed that when TiO2/SnO2 was at the ratio of 0.3/0.7 and calcined at 550℃,performed a much better photocatalytic efficiency.

並列關鍵字

sol-gel method ； mesoporous SnO2 ； doping ； block copolymer

參考文獻

27. 張正明，2002，酸性溶液下中孔徑分子篩的反應機構之探討，中原大學化學系碩士論文，第1-3頁

23. 洪庭旭, 2007, 界面活性劑溶液濕潤疏水表面之行為,國立中央大學

14. 吳泉毅、楊宗樺、林鴻明, 2003, 奈米半導體材料之氣體感測性質,25卷第3期,405-415。

5. 郭清癸、黃俊傑、牟中原,2001,金屬奈米粒子的製造,物理雙月刊,23卷第6期

24. 賈魯強、黎璧賢，2001，「漫談顆粒體物理」，物理雙月刊，第23期，第503-510頁。