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Enhanced solar light driven hydrogen generation and environment remediation through Nd incorporated ZnIn2S4

Author

Listed:
  • Janani, R.
  • Priyanga, G.Sudha
  • Behara, Santosh
  • Melvin, Ambrose Ashwin
  • Shaheer, A.R.M.
  • Thomas, Tiju
  • Neppolian, Bernaurdshaw
  • Singh, Shubra

Abstract

Visible-light-driven hydrogen production is a promising pathway to realize efficient solar energy utilization. Here, Nd3+ incorporated ZnIn2S4 (Nd-ZIS) was synthesized via facile one step hydrothermal method. Raman spectroscopy and X-ray Photoelectron Spectroscopy (XPS) confirm the successful incorporation of Nd3+ in ZnIn2S4. Optical studies reveal the reduction of effective bandgap from 2.7 eV to 2.54 eV upon incorporation of Nd3+ with improved charge carrier life time of 3.12 ns. Electronic properties of ZIS and Nd-ZIS were investigated from first principle calculations. An attempt to improve photocatalytic activity of ZIS by modification with Nd3+ ions resulted in degradation of organic pollutant up to 98% under natural sunlight and decrease in life time of trap states up to a nominal value of 200 ms (as evident from photoelectrochemical measurements). The mechanism behind enhancement of photocatalytic activity of ZIS post Nd3+ integration has been proposed. Nd-ZIS was also utilized for water splitting activity exhibiting a considerable H2 generation ∼3415 μmol g−1. To the best of our knowledge, activity of Nd3+ incorporated ZIS has been explored for the first time in present work. It is believed that an in-depth understanding of photoactivity of ZIS would be significantly important for designing materials with desired photocatalytic performance in future.

Suggested Citation

  • Janani, R. & Priyanga, G.Sudha & Behara, Santosh & Melvin, Ambrose Ashwin & Shaheer, A.R.M. & Thomas, Tiju & Neppolian, Bernaurdshaw & Singh, Shubra, 2020. "Enhanced solar light driven hydrogen generation and environment remediation through Nd incorporated ZnIn2S4," Renewable Energy, Elsevier, vol. 162(C), pages 2031-2040.
    • Handle: RePEc:eee:renene:v:162:y:2020:i:c:p:2031-2040
    DOI: 10.1016/j.renene.2020.09.081
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    References listed on IDEAS

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    1. Yang, Lingyan & Liu, Jing & Yang, Liping & Zhang, Mei & Zhu, Hui & Wang, Fu & Yin, Jiao, 2020. "Co3O4 imbedded g-C3N4 heterojunction photocatalysts for visible-light-driven hydrogen evolution," Renewable Energy, Elsevier, vol. 145(C), pages 691-698.
    2. Wang, Tao & Liu, Xiqing & Men, Qiuyue & Ma, Changchang & Liu, Yang & Huo, Pengwei & Yan, Yongsheng, 2020. "A Z-scheme TiO2 quantum dots fragment-Bi12TiO20 composites for enhancing photocatalytic activity," Renewable Energy, Elsevier, vol. 147(P1), pages 856-863.
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