In this study, a novel composite Ni-OTiO₂ was prepared by doping nickel and introducing excess oxygen defects in TiO₂. The as-synthesized Ni-OTiO₂ particles were characterized by scanning electron microscopy, X-ray diffractino, transmission electron microscopy, Fourier transform infrared spectroscopy, differential reflectance spectroscopy, photoluminescence, photoelectrochemistry, and X-ray photoelectron spectroscopy. When employing Ni (1%)-OTiO₂ as photocatalyst, the conversion of benzyl alcohol (BA) was up to 93% by 1 h irradiation derived from a 300 W xenon lamp, which is ∼8-times higher than that using pure TiO₂. Moreover, while being irradiated with the 300 W xenon lamp (using a filter, λ > 420 nm), the Ni (1%)-OTiO₂ conducted photocatalytic system can give 86% conversion of BA to benzaldehyde within 1 h. Specifically, during photocatalysis, a peroxo group and nickel ion act as the electron carrier, promoting the separation of the electron–hole pair. It is considered that the highly improved photocatalytic ability after modification of pure TiO₂ is ascribable to the synergistic effect of excess oxygen defects and nickel doping in TiO₂.

中文翻译：

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镍掺杂过量氧缺陷二氧化钛用于苄醇的高效选择性光催化氧化

在这项研究中，一种新型的复合材料的Ni-OTIO ₂ 是由掺杂的镍和以TiO导入过量氧的缺陷制备₂。通过扫描电子显微镜，X射线衍射，透射电子显微镜，傅立叶变换红外光谱，微分反射光谱，光致发光，光电化学和X射线光电子光谱对合成后的Ni-OTiO ₂颗粒进行表征。当使用Ni（1％）-OTiO ₂作为光催化剂时，通过300 W氙气灯照射1 h，苯甲醇（BA）的转化率高达93％，是纯TiO的约8倍。_2个。此外，在用300 W氙气灯（使用滤光片，λ> 420 nm）照射的同时，Ni（1％）-OTiO ₂传导光催化体系可在1 h内将BA转化为苯甲醛的86％。具体来说，在光催化过程中，过氧基团和镍离子充当电子载体，促进了电子-空穴对的分离。据认为，纯的TiO修改后的高度改善的光催化能力₂是可归因于过量的氧缺陷的以TiO的协同效应和镍掺杂₂。