Controlled Synthesis of Perforated Oxide Nanosheets with High Density Nanopores Showing Superior Water Purification Performance

• DOI: 10.1021/acsami.2c01474
• Publication Date: 2022-04-19T01:44:11Z
• Authors: Yongtao Li; José Julio Gutiér...; Zhaoqi Song; Dongqing Liu; Maoyu Wang; Aymeric Ramiere; Zhenxing Feng; Qingshan Jason Niu; Takayoshi Sasaki; Xingke Cai
• Keywords: Nanopore

A method for creating genuine nanopores in high area density on monolayer two-dimensional (2D) metallic oxides has been developed. By use of the strong reduction capability hydroiodic acid, active metal ions, such as FeIII and CoIII, 2D oxide nanosheets can be reduced to a divalent charge state (2+). The selective removal FeO2 CoO2 units from framework tuned produce pores range 1–4 nm. monitoring redox reaction kinetics, pore also ∼0.9 × 104 ∼3.3 105 μm–2. universality this much smaller higher than previously reported ones proven different nanosheets. To demonstrate their potential applications, ultrasmall organic particles were grown inside perforated titania optimized hybrid film showed ∼100% rejection methylene blue (MB) water. Its water permeance reached 4260 L m–2 h–1 bar–1, which is 1–3 orders that membranes with good MB rejections.