光催化分解水產(chǎn)氫ppt課件

1、1,孫凈雪，陳剛*，裴健，金仁成，李英宣,新型Bi1.5Zn1-xCuxTa1.5O7 光催化劑: 可見光分解水性能及電子結(jié)構(gòu)的研究,哈爾濱工業(yè)大學(xué)化學(xué)系,86)-451-86413753，；,第 12 屆全國氫能會議暨第 4 屆兩岸三地氫能研討會大會報告,2,煤、石油、天然氣等傳統(tǒng)能源面臨枯竭之勢，同時這些能源帶來的環(huán)境問題也日趨嚴(yán)重。 開發(fā)無污染、可再生的新能源及高效、環(huán)保的污染物處理技術(shù)勢在必行。 太陽能 半導(dǎo)體 自從Fujishima和Honda于1972年發(fā)現(xiàn)了TiO2光電化學(xué)分解水產(chǎn)生H2和O2以來，科學(xué)工作者為實現(xiàn)太陽能光解水制氫一直在作不懈的努力,制氫,降解,緒論,3,緒論,F

2、ig.1 Basic principle of overall water splitting on a heterogeneous photocatalyst,Sun JX, Chen G, etc. Energy Environ. Sci., 2011,4, 4052-4060,4,緒論,能隙寬度 導(dǎo)帶組成及位置 價帶組成及位置 躍遷類型及雜質(zhì)能級,Fig. 2 The band structures of common photocatalysts,J. Mater. Chem. 2010, 20, 627-641,5,緒論,Fig.3 Elements constructing het

3、erogeneous photocatalysts,涵蓋大多數(shù)元素 金屬氧化物 燒綠石/鈣鈦礦結(jié)構(gòu) 鉭酸鹽催化劑,Chem. Soc. Rev. 2009, 38, 253278,6,實驗部分,Fig. 4 The crystal structure of Bi1.5ZnTa1.5O7 (-BZT)showing the Bi1.5Zn0.5O6 sublattice (left) and the Zn0.5Ta1.5O sublattice (right,固相法提高結(jié)晶度、摻雜提高可見光響應(yīng)、精修及DTF計算研究晶體電子結(jié)構(gòu),J. Mater. Chem., 2011, 21, 149615

4、02,7,Fig. 5 (a) XRD patterns of Bi1.5Zn1-xCuxTa1.5O7 with different values of copper doped, and (b) the detailed magnifying of diffraction peak (222,結(jié)果與討論,8,結(jié)果與討論,Fig. 6 SEM images of (a) -BZT and (b) 0.01Cu-BZT,Fig. 7 UV-vis spectra of Cu-BZT. The inset is the corresponding Eg value,9,結(jié)果與討論,Fig. 8

5、Photocatalytic performance of Bi1.5Zn1-xCuxTa1.5O7 under (a) UV and (b) visible light,10,結(jié)果與討論,Fig. 9 The crystal structure of Bi1.5ZnTa1.5O7,Fig. 10 XRD and Rietveld refinement pattern of Bi1.5ZnTa1.5O7,Rwp=0.0871 Rp=0.0746,11,結(jié)果與討論,Fig. 11 The calculated energy band and density of states (DOS) of

6、-BZT: (a) the energy band and (b) the density of states,12,結(jié)果與討論,Fig. 11 The calculated energy band and density of states (DOS) of Cu-BZT: (a) the energy band and (b) the density of states,13,結(jié)果與討論,Fig. 12 Schematic diagram of band structure and light responding of Cu-BZT,14,結(jié)論,利用簡單的固相法合成出了一種新型的具有燒綠石型結(jié)構(gòu)的光催化劑Bi1.5ZnTa1.5O7