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首页> 外文期刊>Applied Surface Science >Control of Ti~(3+)surface defect on TiO_2 nanocrystal using various calcination atmospheres as the first step for surface defect creation and its application in photocatalysis
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Control of Ti~(3+)surface defect on TiO_2 nanocrystal using various calcination atmospheres as the first step for surface defect creation and its application in photocatalysis

机译：各种煅烧气氛控制TiO_2纳米晶表面Ti〜（3+）表面缺陷的产生及其在光催化中的应用

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摘要

A new development to create the surface defect (Ti~(3+)) on TiO_2 was reported in this paper and compared to the common methods which must prepare the crystalline TiO_2 in the first step prior, and then create the surface defect in the second step. In this work, the surface defect creation was performed in the first step coinciding with the crystalline TiO_2 preparation using the sol-gel method. The creation was performed by varying the amounts of oxygen fed during calcination. Based on the CO_2-temperature programmed desorption (CO_2-TPD) and electron spin resonance (ESR) results, the surface defect (Ti~(3+)) substantially increased with the amount of oxygen fed. Moreover, the samples resulting from calcination were used as photocatalysts for ethylene decomposition. The reactivity of those samples was also discussed.
机译：本文报道了在TiO_2上产生表面缺陷（Ti〜（3+））的新进展，并将其与必须先在第一步中制备结晶TiO_2，然后在第二步中产生表面缺陷的常规方法进行了比较。步。在这项工作中，与使用溶胶-凝胶法制备晶体TiO_2一致的第一步是进行表面缺陷的产生。通过在煅烧期间改变进料的氧气量来进行生成。基于CO_2程序升温脱附（CO_2-TPD）和电子自旋共振（ESR）结果，表面缺陷（Ti〜（3+））随着进料的氧气量而大大增加。此外，将煅烧得到的样品用作乙烯分解的光催化剂。还讨论了这些样品的反应性。

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