Al-Antaki Ahmed Hussein Mohammed, Lawrance Warren D, Raston Colin L
Flinders Institute for Nanoscale Science and Technology, College of Science and Engineering, Flinders University Adelaide SA 5042 Australia
Department of Chemistry, Faculty of Sciences, Kufa University Kufa Najaf Iraq.
Nanoscale Adv. 2019 Oct 23;1(12):4722-4728. doi: 10.1039/c9na00481e. eCollection 2019 Dec 3.
A method has been developed to slice boron nitride nanotubes BNNTs under continuous flow in a vortex fluidic device (VFD), along with a method to partially purify the as received BNNT containing material. The latter involves heating the BNNTs to 600 °C followed by dispersing in a 1 : 3 isopropyl alcohol (IPA) and water mixture at 100 °C. The VFD mediated slicing of the BNNTs comprises irradiating the rapidly rotating glass tube (20 mm OD) with a pulsed Nd:YAG laser. Systematically exploring the operating parameter space of the VFD established slicing of 200 μm long purified BNNTs down to 340 nm to 400 nm, in 53% yield, in a 1 : 1 mixture of IPA and water, in the absence of reagents/harsh chemicals, at a flow rate of 0.45 mL min, a concentration of 0.1 mg mL BNNTs and an 8.5k rpm rotational speed, with the pulsed laser operating at 1064 nm and 250 mJ per pulse.
已经开发出一种在涡旋流体装置（VFD）中连续流动的条件下对氮化硼纳米管（BNNTs）进行切片的方法，以及一种对所接收的含BNNT材料进行部分纯化的方法。后者包括将BNNTs加热到600°C，然后在100°C下分散于1:3的异丙醇（IPA）和水的混合物中。VFD介导的BNNTs切片包括用脉冲Nd:YAG激光照射快速旋转的玻璃管（外径20 mm）。系统地探索VFD的操作参数空间，发现在IPA和水的1:1混合物中，在没有试剂/苛刻化学品的情况下，以0.45 mL min的流速、0.1 mg mL的BNNTs浓度和8.5k rpm的转速，用脉冲激光在1064 nm波长下以每脉冲250 mJ的能量运行时，可将200μm长的纯化BNNTs切成340 nm至400 nm，产率为53%。
