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采用脉冲激光轰击浸于流动乙醇中转动的FeNi合金固体靶连续制备得到纳米FeNi乙醇溶胶及其纳米合金,能谱扫描测得纳米FeNi合金粒子Fe与Ni元素重量比约为66:34;TEM观察纳米FeNi粒子初始粒径约为1～5nm,并随放置时间延长聚集长大;XRD显示纳米FeNi合金基本为非晶态;荧光光谱发现纳米FeNi合金溶胶在311.00nm处有一强的激发峰以及在273.00和347.00nm处的二个弱激发峰,以311.00nm作为激发波长得到位于418.00nm处的一强荧光光谱峰;UV-vis表明纳米FeNi合金溶胶在230.00nm左右有一个含有一组可分辨的9个细峰的强吸收峰和一个位于275.00nm处的弱激子吸收峰;FT-IR发现纳米FeNi/乙醇溶胶中乙醇缔合态羟基的伸缩振动吸收峰(v_(O-H))明显蓝移,并且证实获得的纳米FeNi合金粒子表面在制备过程中为乙醇裂解产生的碳氢有机基团所修饰。
The FeNi alloy sol-gel and its nano-alloy were prepared continuously by pulsed laser bombardment of FeNi alloy solid target immersed in flowing ethanol. The weight ratio of Fe to Ni of the nano-FeNi alloy was about 66:34 by energy spectrum scanning. The initial size of nano-FeNi particles was about 1 ~ 5nm and aggregated with the extension of time. The XRD showed that the nano-FeNi alloy was basically amorphous. The fluorescence spectrum showed that the nano-FeNi alloy sol had a strong excitation peak at 311.00nm, 273.00 and 347.00nm at the weak excitation peak at 311.00nm as the excitation wavelength at 418.00nm at a strong fluorescence peak; UV-vis shows that the nano-FeNi alloy sol at 230.00nm has a containing a group of discernable 9 strong peaks and a weak exciton absorption peak at 275.00 nm. FT-IR showed that the stretching vibration absorption peak (v_ (OH)) of ethanol-associated hydroxyl groups in the FeNi / ethanol sol was significantly blue-shifted , And confirmed that the surface of the obtained nano-FeNi alloy particles was modified by the hydrocarbon organic groups produced by the ethanol cracking in the preparation process.