Efficient and stable photocatalytic hydrogen production from water splitting over ZnxCd1-xS solid solutions under visible light irradiation

Chih Chieh Chan, Chung Chieh Chang, Chia Hao Hsu, Yu Ching Weng, Kew Yu Chen, Hsiao Han Lin, Wen Chih Huang, Sheng Fa Cheng

研究成果: 雜誌貢獻文章同行評審

55 引文 斯高帕斯(Scopus)

摘要

A simple co-precipitation method was employed to synthesize a series of cubic zinc-blende phase of ZnxCd1-xS photocatalysts using Na2S as the S source. Structural, morphological and optical properties of the samples have been investigated by XRD, SEM, EDS, XRF, ICP, N2 physisorption and UV-vis diffuse reflectance techniques. The ZnxCd1-xS solid solution is not a simple compound mixture of ZnS and CdS, its XRD patterns show new structural peaks instead of mixture of original peaks. The lattice parameter a measured from the XRD patterns of the ZnxCd1-xS samples exhibits a slightly nonlinear relationship with the Zn mole fraction, which is slightly inconsistent with Vegard's law, thus suggesting that a nonhomogeneous alloy structure exists in ZnxCd1-xS solid solution. The photocatalytic H2 evolution from water splitting in the sacrificial reagents of 0.25 M Na 2S/0.35 M K2SO3 under visible light at 30°C and 55°C were also examined in the study. It is found that Zn xCd1-xS solid solution with composition x = 0.4-0.5 shows the highest photocatalytic H2 production performance. The studied ZnxCd1-xS exhibits at least 50 h stable photocatalytic activity under outdoor sunlight irradiation.
原文英語
頁(從 - 到)1630-1639
頁數10
期刊International Journal of Hydrogen Energy
39
發行號4
DOIs
出版狀態已發佈 - 一月 22 2014
對外發佈

ASJC Scopus subject areas

  • 可再生能源、永續發展與環境
  • 燃料技術
  • 凝聚態物理學
  • 能源工程與電力技術

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