教師資料查詢 | 類別: 期刊論文 | 教師: 董崇禮 CHUNG-LI DONG (瀏覽個人網頁)

標題:Heterojunction of zinc blende/wurtzite in Zn1-xCdxS solid solution for efficient solar hydrogen generation: x-ray absorption/diffraction approaches
學年104
學期1
出版(發表)日期2015/09/24
作品名稱Heterojunction of zinc blende/wurtzite in Zn1-xCdxS solid solution for efficient solar hydrogen generation: x-ray absorption/diffraction approaches
作品名稱(其他語言)
著者Ying-Ya Hsu; Nian-Tzu Suen; Chung-Chieh Chang; Sung-Fu Hung; Chi-Liang Chen; Ting-Shan Chan; Chung-Li Dong; Chih-Chieh Chan; San-Yuan Chen; Hao Ming Chen
單位
出版者
著錄名稱、卷期、頁數ACS Applied Materials and Interfaces 7(40), pp.22558–22569
摘要In the past decade, inorganic semiconductors have been successfully demonstrated as light absorbers in efficient solar water splitting to generate chemical fuels. Pseudobinary semiconductors Zn1–xCdxS (0 ≤ x ≤ 1) have exhibited a superior photocatalytic reactivity of H2 production from splitting of water by artificial solar irradiation without any metal catalysts. However, most studies had revealed that the extremely high efficiency with an optimal content of Zn1–xCdxS solid solution was determined as a result of elevating the conduction band minimum (CBM) and the width of bandgap. In addition to corresponding band structure and bandgap, the local crystal structure should be taken into account as well to determine its photocatalytic performance. Herein, we demonstrated the correlations between the photocatalytic activity and structural properties that were first studied through synchrotron X-ray diffraction and X-ray absorption spectroscopy. The crystal structure transformed from zinc blende to coexisted phases of major zinc blende and minor wurtzite phases at a critical point. The heterojunction formed by coexistence of zinc blende and wurtzite phases in the Zn1–xCdxS solid solution can significantly improve the separation and migration of photoinduced electron–hole pairs. Besides, X-ray absorption spectra and UV–vis spectra revealed that the bandgap of the Zn0.45Cd0.55S sample extended into the region of visible light because of the incorporation of Cd element in the sample. These results provided a significant progress toward the realization of the photoelectrochemical mechanism in heterojunction between zinc blende and wurtzite phases, which can effectively separate the charge-carriers and further suppress their recombination to enhance the photocatalytic reactivity.
關鍵字hydrogen evolution reaction (HER);zinc−cadmium sulfide;heterojunction;X-ray absorption;density of states (DOS) and Rietveld structural refinements
語言英文(美國)
ISSN1944-8244;1944-8252
期刊性質國外
收錄於SCI;
產學合作
通訊作者C. L. Chen; T. S. Chan
審稿制度
國別美國
公開徵稿
出版型式,電子版,紙本
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