以氮改質的鉑/二氧化鈦於可見光下分解水製氫之研究

Study of Water Splitting Reaction on Pt/TiO2: N under Visible Light Irradiation

吳仁彰(Ren-Jang Wu) ； 洪珩婕(Heng-Chieh Hung) ； 謝穎杰(Ying-Chieh Hsieh)

《臺灣鑛業》 63卷2期 (2011/06) Pp. 25-36

https://doi.org/10.30014/TMI.201106.0005

摘要

本研究主要將二氧化鈦於自製的過程中，摻雜入含氮的化合物，以氮來改質二氧化鈦光觸媒，再用含浸法於二氧化鈦表面含浸Pt離子，製備一系列N-TiO2光觸媒。在可見光的範圍內，純的自製二氧化鈦是沒有分解水產生氫氣的能力，而以含浸法將鉑含浸至改質過的二氧化鈦的表面上，由於鉑具有引導電子的效能，可使氫氣產率普遍獲得提升。實驗結果顯示0.03 wt% Pt/TiO2單位時間氫氣產率達15.36 μ mol/1h．1g，若為N改質的二氧化鈦產氫的效果可提高，0.03 wt% Pt/N-TiO2 可達17.1 μ mol/1hr．1g。製備光觸媒的過程中，會因不同氮化合物的來源，使得單位時間內氫氣的產量有明顯的差異，產氫效果以氨水（Ammonia）較穩定。改變不同鈦和氮的莫耳比會有提升氫氣的產量，而N/Ti = 6為最佳比例，在單位時間內氫氣的產量最高可達到40.8 μ mol/1h．1g。

關鍵字

二氧化鈦 ； 光觸媒 ； 分解水 ； 產生氫氣

並列摘要

The purpose of this research is to investigate the process of doping nitrogen to titanium dioxide and the subsequent change in the structure of titanium dioxide by impregnation of platinum ion solution to precipitate platinum particle on the surface, in order to create a set of photo-catalytic N-TiO2. Under visible light irradiation, pure titanium dioxide does not produce hydrogen gas. Precipitation of platinum nano-particle on the surface of Titanium dioxide by impregnation platinum ion solution improves the performance of hydrogen gas generation by water splitting. Thus platinum has the ability to emit electrically this consequently.It was shown that the H2 generation efficiency with 0.03 wt% Pt/TiO2 were 15.36 μ mol/1h．1g, which was emitted by N-TiO2 which improved at 0.03 wt% Pt/N-TiO2 leading to 17.1 μ mol/1h．1g. During the process of preparing photo-catalysis, there are different outputs of hydrogen production within certain period of time due to the source. Among several nitrogen sources, Ammonia is the most stable one. However changing mole percentage of Ti and N can improve the output of hydrogen production, N/Ti = 6 is the best ratio. In addition, output of hydrogen yield could up must to 40.8 μ mol/1h．1g.

並列關鍵字

titanium dioxides ； photocatalyst ； water splitting ； hydrogen production