Visible-Light-Driven Photoelectrochemical and Photocatalytic Performance of NaNbO3 /Ag2 S Core-Shell Heterostructures

S. Kumar, A.P. Singh, C. Bera, Meganathan Thirumal, B.R. Mehta, A.K. Ganguli

Research output: Contribution to journalArticleScientificpeer-review

31 Citations (Scopus)


Herein, we report the fabrication of visible-light-active NaNbO3/Ag2S staggered-gap core–shell semiconductor heterostructures with excellent photoelectrochemical activity toward water splitting, and the degradation of a model pollutant (methylene blue) was also monitored. The heterostructures show a pronounced photocurrent density of approximately 2.44 mA cm−2 at 0.9 V versus Ag/AgCl in 0.5 m Na2SO4 and exhibit a positive shift in onset potential by approximately 1.1 V. The high photoactivity is attributed to the efficient photoinduced interfacial charge transfer (IFCT). The core–shell design alleviates the challenges associated with the electron–hole paths across semiconductor junctions and at the electrolyte–semiconductor interface. These properties demonstrate that NaNbO3/Ag2S core–shell heterostructures show promising visible-light photoactivity and are also efficient, stable, and recyclable photocatalysts.
Original languageEnglish
Pages (from-to)1850-1858
Issue number14
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed


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