Three different pyridine compounds were introduced to control the surface structure of TiO2,and utilizing the electron-withdrawing effect of the C＝N unsaturated bonds in the molecules enriched the electrons on the TiO2 surface,thereby enhancing the photocatalytic ability of rutile TiO2.By means of SEM,XPS,i-t,UV-Vis and other characterization methods,the effects of the surface electron-rich structure on the microscopic morphology,surface electronic structure,surface energy band structure and photoelectrochemical responsiveness of TiO2 nanorods,as well as its effect on photodegradation performance of water were studied.The results showed that the electron-deficient structure of C＝N provided sites for electron enrichment on the surface of the catalyst,which increased the migration path of photogenerated carriers,was conducive to the separation of photogenerated electron-hole pairs,and reduced the forbidden band width,thus effectively improving the photoresponsive ability of the catalyst.Among them,TiO2-PD had a high hydrogen production rate,and the hydrogen production performance could reach 39 mmol·g-1·h-1.
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基金资助
国家自然科学基金(51572004);安徽省高等学校学科(专业)拔尖人才学术基金项目(gxbjZD2021064);安徽省高等学校自然科学基金项目(KJ2016SD06);安徽工程大学杰出青年自然科学基金项目(2016JQ01)
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