Exfoliation of a non-van der Waals material from iron ore hematite

Aravind Puthirath Balan, Sruthi Radhakrishnan, Cristiano F. Woellner, Shyam K. Sinha, Liangzi Deng, Carlos De Los Reyes, Banki Manmadha Rao, Maggie Paulose, Ram Neupane, Amey Apte, Vidya Kochat, Robert Vajtai, Avetik R. Harutyunyan, Ching Wu Chu, Gelu Costin, Douglas S. Galvao, Angel A. Martí, Peter A. Van Aken, Oomman K. Varghese, Chandra Sekhar TiwaryAnantharaman Malie Madom Ramaswamy Iyer, Pulickel M. Ajayan

研究成果: Article同行評審

285 引文 斯高帕斯(Scopus)


With the advent of graphene, the most studied of all two-dimensional materials, many inorganic analogues have been synthesized and are being exploited for novel applications. Several approaches have been used to obtain large-grain, high-quality materials. Naturally occurring ores, for example, are the best precursors for obtaining highly ordered and large-grain atomic layers by exfoliation. Here, we demonstrate a new two-dimensional material 'hematene' obtained from natural iron ore hematite (α-Fe2O3), which is isolated by means of liquid exfoliation. The two-dimensional morphology of hematene is confirmed by transmission electron microscopy. Magnetic measurements together with density functional theory calculations confirm the ferromagnetic order in hematene while its parent form exhibits antiferromagnetic order. When loaded on titania nanotube arrays, hematene exhibits enhanced visible light photocatalytic activity. Our study indicates that photogenerated electrons can be transferred from hematene to titania despite a band alignment unfavourable for charge transfer.

頁(從 - 到)602-609
期刊Nature Nanotechnology
出版狀態Published - 2018 7月 1

All Science Journal Classification (ASJC) codes

  • 生物工程
  • 原子與分子物理與光學
  • 生物醫學工程
  • 一般材料科學
  • 凝聚態物理學
  • 電氣與電子工程


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