Kang Sv-Yuan, Tsai Hsiao-Hsin, Nguyen Nhat-Thien, Chang Chang-Tang, Tseng Chao-Heng
J Nanosci Nanotechnol. 2016 Feb;16(2):1961-6. doi: 10.1166/jnn.2016.10730.
Large amount of calcium fluoride sludge was generated by semiconductor industry every year. It also needs high requirement of fuel consumption using rotor concentrator and thermal oxidizer to treat VOCs. The mesoporous catalyst prepared by calcium fluoride sludge was used for VOCs treatment in this study. Acetone is a kind of solvent and used in a large number of laboratories and factories. The serious problems will be caused when it exposed to the environmental. Economic and practical technology is needed to eliminate this kind of hazardous air pollutant. In this research, the adsorption of acetone was tested with CF-MCM (mesoporous silica materials synthesized from calcium fluoride). The raw material was mixed with cationic cetyltrimethyl ammonium bromide (CTAB) surfactants, firstly. The prepared mesoporous silica materials were characterized by nitrogen adsorption and desorption analysis, transmission electron microscope (TEM), scanning electron microscopy (SEM), X-ray powder diffractometer (XRPD) and Fourier transform infrared spectroscopy (FTIR). The results showed that the surface area, large pore volume and pore diameter could be up to 862 m2 g(-1), 0.57 cm3 g(-1) and 2.9 nm, respectively. The crystal patterns of CF-MCM were similar with MCM-41 from TEM image. The adsorption capacity of acetone with CF-MCM was 118, 190, 194 and 201 mg g(-1), respectively, under 500, 1000, 1500 and 2000 ppm. Furthermore, the adsorption capacity of MCM-41 and CF-MCM was almost the same. The effects of operation parameters, such as contact time and mixture concentration, on the performance of CF-MCM were also discussed in this study.
半导体行业每年都会产生大量的氟化钙污泥。使用转子浓缩器和热氧化器处理挥发性有机化合物（VOCs）对燃料消耗的要求也很高。本研究采用由氟化钙污泥制备的介孔催化剂来处理VOCs。丙酮是一种溶剂，在大量的实验室和工厂中都有使用。当它暴露在环境中时会引发严重问题。需要经济实用的技术来消除这种有害空气污染物。在本研究中，用CF-MCM（由氟化钙合成的介孔二氧化硅材料）测试了丙酮的吸附性能。首先将原料与阳离子十六烷基三甲基溴化铵（CTAB）表面活性剂混合。通过氮气吸附-脱附分析、透射电子显微镜（TEM）、扫描电子显微镜（SEM）、X射线粉末衍射仪（XRPD）和傅里叶变换红外光谱（FTIR）对制备的介孔二氧化硅材料进行了表征。结果表明，其比表面积、大孔体积和孔径分别可达862 m2 g(-1)、0.57 cm3 g(-1)和2.9 nm。从TEM图像来看，CF-MCM的晶体结构与MCM-41相似。在500、1000、1500和2000 ppm下，CF-MCM对丙酮的吸附容量分别为118、190、194和201 mg g(-1)。此外，MCM-41和CF-MCM的吸附容量几乎相同。本研究还讨论了操作参数（如接触时间和混合浓度）对CF-MCM性能的影响。
