Fabrication of the novel core-shell MCM-41@mTiO(2) composite microspheres with large specific surface area for enhanced photocatalytic degradation of dinitro butyl phenol (DNBP)
Fabrication of the novel core-shell MCM-41@mTiO(2) composite microspheres with large specific surface area for enhanced photocatalytic degradation of dinitro butyl phenol (DNBP)
复制标题
新型大比表面积核壳MCM-41@mTiO(2)复合微球的制备用于增强光催化降解二硝基丁基苯酚(DNBP)
DOI：
10.1016/j.apsusc.2016.03.047
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发表时间：
2016
影响因子：
6.7
通讯作者：
Jiang Wen-Feng
中科院分区：
文献类型：
--
作者：
Wei Xiao-Na;Wang Hui-Long;Li Zhen-Duo;Huang Zhi-Qiang;Qi Hui-Ping;Jiang Wen-Feng
采用溶胶-凝胶法和简单水热法制备了介孔MCM-41@mTiO2core-shell复合微球。采用扫描电镜（SEM）、透射电镜（TEM）、n2吸附-解吸测试、x射线粉末衍射（XRD）、紫外可见漫反射光谱（UV-vis /DRS）和傅里叶变换红外光谱（FT-IR）对合成材料的形貌和微观结构特征进行了表征。结果表明：复合材料具有明显的核/壳结构，具有纯介孔且结晶良好的tio2层（mTiO2），高比表面积（316.8 m2/g），大孔体积（0.42 cm3/g）和2.6 nm和11.0 nm两种不同孔径。研究了新型MCM-41@mTiO2composite在紫外和可见光照射下对水悬浮液中2-仲丁基-4,6-二硝基苯酚（DNBP）的光催化活性。结果与工业锐钛矿tio2和德固赛P25进行了比较，在相同的条件下，合成的MCM-41@mTiO2composite材料的降解效果增强，表明该材料可以作为一种有效的光催化剂降解废水中的有害有机污染物。
The mesoporous MCM-41@mTiO2core-shell composite microspheres were synthesized successfully by combining sol-gel and simple hydrothermal treatment. The morphology and microstructure characteristics of the synthesized materials were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2adsorption-desorption measurements, X-ray powder diffraction (XRD), UV–vis diffuse reflectance spectra (UV–vis/DRS) and Fourier transform infrared spectroscopy (FT-IR). The results indicate that the composite material possesses obvious core/shell structure, a pure mesoporous and well-crystallized TiO2layer (mTiO2), high specific surface area (316.8 m2/g), large pore volume (0.42 cm3/g) and two different pore sizes (2.6 nm and 11.0 nm). The photocatalytic activity of the novel MCM-41@mTiO2composite was evaluated by degrading 2-sec-butyl-4,6-dinitrophenol (DNBP) in aqueous suspension under UV and visible light irradiation. The results were compared with commercial anatase TiO2and Degussa P25 and the enhanced degradation were obtained with the synthesized MCM-41@mTiO2composite under the same conditions, which meant that this material can serve as an efficient photocatalyst for the degradation of hazardous organic pollutants in wastewaters.