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Synthesis of oxygen vacancy-rich black TiO2 nanoparticles and the visible light photocatalytic performance
Molecular Catalysis ( IF 4.6 ) Pub Date : 2018-07-20 , DOI: 10.1016/j.mcat.2018.07.006
Lijuan Han , Bitao Su , Gang Liu , Zheng Ma , Xingcai An

The oxygen vacancy-rich black TiO2 (B-TiO2) consisted of compactly and densely stacked nanoparticles was prepared by thermal treatment amorphous Ti(OH)x in vacuum. A series of characterization were used to investigate the structure, light absorption ability and chemical environment of samples. Phenol was used to evaluate the photocatalytic performance of the materials under visible light irradiation. The results show that the removal rate constant of B-TiO2 in visible light reaches to 0.1316 h−1, is the 5.2 times of P25, exhibiting excellent photocatalytic performance. The excellent photocatalytic performance of B-TiO2 possibly results from the large amounts of oxygen vacancies and the special structure. The large amounts of oxygen vacancies expand the visible light scope. And, the compactly and densely stacked nanoparticles aggregation exhibit large specific areas, plentiful pores and high separation efficiency of photogenerated electrons-holes so that the photocatalytic performance of B-TiO2 is enhanced drastically.



中文翻译:

富氧空位的黑色TiO 2纳米粒子的合成及可见光催化性能

通过在真空中热处理非晶态Ti(OH)x来制备由致密且致密堆叠的纳米颗粒组成的富氧空位黑色TiO 2(B-TiO 2)。通过一系列表征研究了样品的结构,光吸收能力和化学环境。苯酚用于评估材料在可见光照射下的光催化性能。结果表明,可见光中B-TiO 2的去除速率常数达到0.1316 h -1,是P 25的5.2倍,具有良好的光催化性能。B-TiO 2的优异光催化性能可能是由于大量的氧空位和特殊的结构造成的。大量的氧空位扩大了可见光范围。并且,紧密致密地堆叠的纳米颗粒聚集体表现出大的比表面积,大量的孔和光生电子-空穴的高分离效率,从而大大提高了B-TiO 2的光催化性能。

更新日期:2018-07-20
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