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The use of intrinsic titanium oxides for visible light photocatalysis to produce hydrogen is the current frontier of international research on nanomaterials. The type of material thus far obtained is mainly a blue-defective titanium oxide containing trivalent titanium, but this material requires the addition of Pt, NiOx, etc. as a co-catalyst in the hydrogen production process, which not only causes secondary pollution, but also substantially. Increased material costs.
Under the support of the National Natural Science Foundation of China and the Science and Technology Guiding Program of Fujian Province, the research team of the functional nanostructure design and assembly laboratory of the Fujian Institute for the Study of Structure of the Institute of Physical Structure of the Chinese Academy of Sciences, led by Wang Yuansheng, used the ultraviolet light to assist the sol For the first time, the yellow intrinsic defect titanium dioxide containing titanium vacancies and interstitial titanium has been successfully synthesized by the gel method. This material can achieve visible light (λ>420 nm) photocatalytic decomposition of formaldehyde in water by using ultraviolet light under the condition of no catalyst; With longer processing times, hydrogen production efficiency has increased dramatically. Studies have shown that titanium vacancies and interstitial titanium play an important role in achieving visible light absorption and improving photo-generated carrier separation efficiency. It is worth mentioning that the material has good chemical stability and can be used repeatedly. The relevant results have been published online in Nano Energy, 2016, 24, 63-71, and have important application prospects in the field of new energy and the environment.
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