Jump to main content
Jump to site search


Full-spectrum photocatalyst with strong near-infrared photoactivity derived from synergy of nano-heterostructured Er3+-doped multi-phase oxides

Abstract

Development of full-spectrum photocatalysts active in near-infrared (NIR) region has gained increasing attention in photodegradation of organic pollutants. Herein, we designed a full-spectrum photocatalyst with strong NIR photoactivity based on the synergy of Er3+-doped ZnO-CuO-ZnAl2O4 multi-phase oxides (Er3+-doped Zn/Cu/Al-MPO) via formation of n-p-n double heterojunctions. The photocatalyst was prepared by synthsizing nanosheets of Zn/Cu/Al/Er hydrotalcite-like compound (Zn/Cu/Al/Er-HLC) with a co-precipitation method followed by calcining the nanosheets at 800 oC. The as-prepared Er3+-doped Zn/Cu/Al-MPO inherits the nanosheet morphology of Zn/Cu/Al/Er-HLC, and displays over-doubled photoactivities in the entire ultraviolet (UV), visible and NIR regions compared to undoped Zn/Cu/Al-MPO. The excellent photocatalytic activity of Er3+-doped Zn/Cu/Al-MPO, especially its strong NIR photoactivity, is ascribed to its Er3+-doped CuO-involved multi-crystalline phase heterostructure, i.e., n-p-n double heterojuctions, which does not only offer an enhanced NIR absorption but also promotes the separation of photogenerated charge carriers. Importantly, the synergy of all the parts of the n-p-n double heterojuctions plays an important role in interface band structure regulation for enhancement of photocatalytic properties of Er3+-doped Zn/Cu/Al-MPO. This work demonstrated the feasibility of utilizing hydrotalcite-like precursors in design of full-spectrum photocatalysts active in NIR region.

Back to tab navigation

Supplementary files

Publication details

The article was accepted on 09 Nov 2017 and first published on 09 Nov 2017


Article type: Paper
DOI: 10.1039/C7NR08090E
Citation: Nanoscale, 2017, Accepted Manuscript
  •   Request permissions

    Full-spectrum photocatalyst with strong near-infrared photoactivity derived from synergy of nano-heterostructured Er3+-doped multi-phase oxides

    H. Chen, W. Liu, B. Hu, Z. Qin and H. Liu, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR08090E

Search articles by author

Spotlight

Advertisements