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首页> 外文会议>2011 International Conference on Materials for Renewable Energy Environment >Research of preparation of novel nano/submicro-fiber catalyst
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Research of preparation of novel nano/submicro-fiber catalyst

机译：新型纳米/亚超细纤维催化剂的制备研究

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A novel Nano/submicro-fiber catalyst was prepared via electrospinning technology from poly (vinyl pyrrolidone) (PVP) and nano-TiO2. First, nano-TiO2 particles were added into the mixture of ethanol and deionized water, the mass ratio of ethanol and deionized water was 1∶1, the TiO2 suspension was obtained after 1 h with ultrasonic treatment and centrifugal effect, Then PVP was added into the above-mentioned suspension and the content of PVP in the sol was 28%. The TiO2/PVP solution was electrospun with different voltage. The effects of the content of TiO2 and electrospinning voltage on diameter of nano/submicro-fiber were studied. The nano/submicro-fiber catalyst was characterized by SEM, TEM, XRD and FT-IR. The results show that the diameter of nano/submicro-fiber increases with a increase of the content of nano-TiO2 and decreases with the increase of electrospinning voltage. The analytical result showed that the nano-TiO2 particles were well dispersed in the matrix of PVP, moreover, the crystal type of nano-TiO2 was a mixture of anatase and rutile and the diameter of nano-TiO2 particles in the nano/submicro-fiber is in the range of 20nm–60nm and the nano-TiO2 particle was monodisperse, and the nano-TiO2 particle and PVP molecule was connected by a hydrogen bonding. This nano/submicro-fiber catalyst has a high efficiency on degradation on CH2O. 56.8 percent of CH2O was degradated under ultraviolet radiation in 80 minutes when the content of nano-TiO2 is 20% in nano/submicro-fibers.
机译：通过电纺丝技术从聚乙烯吡咯烷酮（PVP）和纳米TiO 2 制备了新型纳米/超细纤维催化剂。首先，将纳米TiO 2 颗粒加入乙醇和去离子水的混合物中，乙醇与去离子水的质量比为1∶1，TiO 2 悬浮液为在经过超声波处理和离心作用1小时后获得PVP，然后将PVP加入上述悬浮液中，溶胶中PVP的含量为28％。 TiO 2 / PVP溶液采用不同的电压进行电纺丝。研究了TiO 2 的含量和静电纺丝电压对纳米/亚微纤维直径的影响。通过SEM，TEM，XRD和FT-IR对纳米/亚超细纤维催化剂进行了表征。结果表明，纳米/亚微纤维的直径随纳米TiO 2 含量的增加而增加，随电纺丝电压的增加而减小。分析结果表明，纳米TiO 2 颗粒很好地分散在PVP的基质中，而且纳米TiO 2 的晶体类型是锐钛矿和锐钛矿的混合物。金红石型，纳米/亚微纤维中纳米TiO 2 颗粒的直径在20nm-60nm范围内，纳米TiO 2 颗粒是单分散的，并且纳米TiO 2 颗粒与PVP分子通过氢键相连。这种纳米/亚超细纤维催化剂在CH 2 O上具有很高的降解效率。当纳米/亚微纤维中纳米TiO 2 的含量为20％时，在80分钟的紫外线照射下，CH 2 O的降解率为56.8％。

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