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首页> 外文期刊>Journal of Nanoelectronics and Optoelectronics >Morphology Adjustment of TiO2 Nanostructures for Enhanced Photocatalytic Properties
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Morphology Adjustment of TiO2 Nanostructures for Enhanced Photocatalytic Properties

机译：TiO2纳米结构的形态调整，用于增强光催化性能

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摘要

Titanium dioxides (TiO2) nanoarchitectures including microspheres surrounded by nanosheets were synthesized using simple, quick and effective hydrothermal method with moderate temperature (150 degrees C). We systematically investigated how reaction time affected final morphologies of TiO2. At reaction times equal to 4 and 8 hours (named as TS-4 and TS-8, respectively), TiO2 formed with morphology of irregular microspheres. At longer reaction times (12 hours, named as TS-12), urchin-like TiO2 nanocrystals formed. Photocatalytic activities of the formed TiO2 with different morphologies were evaluated against decomposition of methylene orange and blue (MO and MB, respectively) as well as rose-bengal (RB). Urchin-like TiO2 demonstrated high degradation ratio similar to the commercial catalyst PS 25 on MO (96%). Degradation ratios of samples synthetized for 4 and 8 hours were much lower: 60 and 80%, respectively. During 30 minutes reaction time, TiO2 with urchin-like morphology showed much higher selectivity towards neutralization of MB (99.5%) than towards MO (73%) and RB (88.7%).
机译：使用具有中等温度（150℃）的简单，快速有效的水热法合成包括纳米片周围围绕的微球的二氧化钛（TiO2）纳米建筑。我们系统地研究了反应时间如何影响TiO2的最终形态。在反应时间等于4和8小时（分别命名为TS-4和TS-8），TiO2形成，形成不规则微球的形态。在更长的反应时间（12小时，命名为TS-12），形成的尿嘧啶样TiO2纳米晶体形成。对具有不同形态的形成TiO2的光催化活性针对分解亚甲基橙和蓝色（MO和MB）以及玫瑰瓣（RB）的分解。胰蛋白样TiO2显示出高降解比与Mo上的商业催化剂PS 25相似（96％）。合成的样品的降解比例为4和8小时的降低比较低：60和80％。在30分钟内反应时间，具有血糖样形态的TiO 2对Mb（​​99.5％）的中和比朝向Mo（73％）和Rb（88.7％）表示了更高的选择性。

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