Rajakaruna Tharindu P B, Udawatte Chandana P, Chandrajith Rohana, Rajapakse Rajapakse Mudiyanselage Gamini
Faculty of Graduate Studies, Sabaragamuwa University of Sri Lanka, 70140 Belihuloya, Sri Lanka.
Department of Physical Sciences and Technology, Faculty of Applied Sciences, Sabaragamuwa University of Sri Lanka, 70140 Belihuloya, Sri Lanka.
ACS Omega. 2021 Jul 7;6(28):17824-17830. doi: 10.1021/acsomega.1c00938. eCollection 2021 Jul 20.
In our previous publication, we published a simple, low-cost, and environmentally friendly process for the breaking down of the ilmenite lattice using rotary autoclaving, separation of titanium and iron components, and the conversion of the titanium component to amorphous TiO and phase-specific titanium dioxide nanorods. Here, the separated iron component was converted into iron oxide (magnetite and hematite) and iron oxy-hydroxide (akaganeite, β-FeOOH) nanoparticles. The process flow diagram is presented to explain the steps involved. The materials synthesized are fully characterized by X-ray diffractogram (XRD), scanning electron microscopy coupled with energy-dispersive X-ray analysis (SEM-EDAX), and Fourier transform infrared (FT-IR), and it is shown that they contain 100% pure iron oxide and iron oxy-hydroxide nanoparticles without any detectable impurities. All of the chemical reactions involved in this process, which contribute to the mechanism of the process, are given. So far, such a low-cost, environmentally friendly, and low-temperature process has not been documented, and the process can be scaled-up for mass production of these nanomaterials used in various technological applications.
在我们之前的出版物中，我们公布了一种简单、低成本且环保的工艺，该工艺通过旋转高压釜分解钛铁矿晶格，分离钛和铁成分，并将钛成分转化为无定形TiO和特定相的二氧化钛纳米棒。在此，分离出的铁成分被转化为氧化铁（磁铁矿和赤铁矿）和羟基氧化铁（针铁矿，β-FeOOH）纳米颗粒。给出了工艺流程示意图以解释其中涉及的步骤。合成的材料通过X射线衍射图（XRD）、扫描电子显微镜结合能量色散X射线分析（SEM-EDAX）和傅里叶变换红外光谱（FT-IR）进行了全面表征，结果表明它们含有100%纯的氧化铁和羟基氧化铁纳米颗粒，没有任何可检测到的杂质。给出了该过程中涉及的所有化学反应，这些反应构成了该过程的机理。到目前为止，尚未有如此低成本、环保且低温的工艺被记录，并且该工艺可以扩大规模以大量生产用于各种技术应用的这些纳米材料。
