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首页> 外文期刊>Journal of Colloid and Interface Science >Low-temperature synthesis of water-dispersible anatase titanium dioxide nanoparticles for photocatalysis
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Low-temperature synthesis of water-dispersible anatase titanium dioxide nanoparticles for photocatalysis

机译:低温合成水分散型锐钛矿型二氧化钛纳米粒子的光催化性能

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摘要

Water-dispersible anatase TiO_2 nanoparticles were synthesized at a low temperature (80°C) without using surfactants via the mechanism of electrostatic stabilization. The water-dispersible TiO_2 nanoparticles solution was stable and no precipitation occurred after 3months. Photocatalytic evaluation demonstrated that the as-synthesized TiO_2 nanoparticles possess excellent quinoline degradation performance (a 2.33×10~(-2)min~(-1) apparent reaction rate constant comparing to 1.22×10~(-2)min~(-1) for P25) and recycle stability (the photocatalytic activity remained 96.6% of the initial activity after four cycles of repetitive uses). These could be attributed to the small size and good water-dispersibility of the as-synthesized TiO_2 nanoparticles that led to large specific surface area and easy photogenerated electron-hole transportation.
机译:通过静电稳定机制,在不使用表面活性剂的情况下,在低温(80℃)下合成了水分散型锐钛矿型TiO_2纳米粒子。水分散性TiO_2纳米粒子溶液稳定,3个月后未发生沉淀。光催化评估表明,合成后的TiO_2纳米粒子具有优异的喹啉降解性能(表观反应速率常数为2.33×10〜(-2)min〜(-1),而1.22×10〜(-2)min〜(-1 )(对于P25)和循环稳定性(在重复使用四个循环后,光催化活性仍保持初始活性的96.6%)。这些可能归因于合成后的TiO_2纳米粒子的小尺寸和良好的水分散性,导致较大的比表面积和易于光生电子空穴的传输。

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