期刊
CATALYSIS SCIENCE & TECHNOLOGY
卷 12, 期 9, 页码 3044-3053出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2cy00148a
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资金
- Scientific and Technological Research Council of Turkey (TUBITAK) [119C219]
Metal doping is an effective strategy to tune the energy levels of semiconductors. In this study, NiTi layered double hydroxide (NiTi-LDH) is doped with cobalt to prepare a ternary LDH, CoNiTi-LDH, which shows enhanced photocatalytic performance for water oxidation and hydrogen evolution.
Metal doping has been used as an effective strategy to tune the energy levels of semiconductors. Herein, we dope NiTi layered double hydroxide (NiTi-LDH) with cobalt to prepare a ternary LDH, CoNiTi-LDH, to enhance its photocatalytic performance towards both water oxidation and hydrogen evolution. A CoNiTi-LDH with smaller plate sizes and a higher degree of order is obtained, which allows the band gap to shrink from 2.7 eV to 2.4 eV. CoNiTi-LDH exhibits a photocatalytic water oxidation activity of 366 mu mol g(-1) h(-1), which is more than two times higher than NiTi-LDH (166 mu mol g(-1) h(-1)). We observed that appropriate energy levels of CoNiTi-LDH allow it to be an efficient photocatalyst also for hydrogen evolution. We performed detailed characterization studies to elucidate the effect of Co-doping on photocatalytic activity.
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