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Oxygen-Vacancy-Enhanced Singlet Oxygen Production for Selective Photocatalytic Oxidation.
ChemSusChem ( IF 7.5 ) Pub Date : 2020-05-04 , DOI: 10.1002/cssc.202000595 Jiajia Wang 1 , Xilong Xu 2 , Yuanyuan Liu 1 , Zeyan Wang 1 , Peng Wang 1 , Zhaoke Zheng 1 , Hefeng Cheng 1 , Ying Dai 2 , Baibiao Huang 1
ChemSusChem ( IF 7.5 ) Pub Date : 2020-05-04 , DOI: 10.1002/cssc.202000595 Jiajia Wang 1 , Xilong Xu 2 , Yuanyuan Liu 1 , Zeyan Wang 1 , Peng Wang 1 , Zhaoke Zheng 1 , Hefeng Cheng 1 , Ying Dai 2 , Baibiao Huang 1
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Oxygen vacancies are usually thought to be beneficial for photogenerated charge separation. In this work, the oxygen vacancies in ov‐Bi2O3 (Bi2O3 with oxygen vacancy) were found to be able to produce 1O2 in the dark owing to chemical adsorption. The oxygen vacancies were further found to be responsible for ov‐Bi2O3 exhibiting higher 1O2 generation under light irradiation with 1O2 as the only reactive oxygen species (ROS) than Bi2O3 with 1O2, H2O2, and others as the ROS. The photocatalytic activity was investigated for the selective photo‐oxidation of phenyl methyl sulfide to phenyl methyl sulfoxide and phenyl alcohol to benzaldehyde. In either case, ov‐Bi2O3 displayed better performance than Bi2O3, suggesting the significant role of oxygen vacancies in modulating the photocatalytic oxidation properties. This work provides an alternative approach to obtain singlet oxygen, which may guide further design of photocatalysts with high efficiency and selectivity towards photocatalytic organic synthesis.
中文翻译：
用于选择性光催化氧化的氧空位增强单线态氧生产。
通常认为氧空位有利于光生电荷分离。在这项工作中，发现由于化学吸附作用，ov-Bi 2 O 3（具有氧空缺的Bi 2 O 3）中的氧空位能够在黑暗中产生1 O 2。氧空位被进一步认为是负责OV-Bi系2 ö 3表现出更高1 Ò 2在光照射下产生与1 ö 2作为唯一的活性氧簇（ROS）比的Bi 2 ö 3与1 ö 2，H 2 O 2等作为ROS。研究了苯甲基硫醚选择性光氧化为苯甲基亚砜和苯醇为苯甲醛的光催化活性。在这两种情况下，ov-Bi 2 O 3的性能都比Bi 2 O 3更好，表明氧空位在调节光催化氧化性能中起着重要作用。这项工作为获得单线态氧提供了另一种方法，它可以指导光催化剂的进一步设计，以高效率和对光催化有机合成的选择性。
更新日期：2020-07-07
中文翻译：
用于选择性光催化氧化的氧空位增强单线态氧生产。
通常认为氧空位有利于光生电荷分离。在这项工作中，发现由于化学吸附作用，ov-Bi 2 O 3（具有氧空缺的Bi 2 O 3）中的氧空位能够在黑暗中产生1 O 2。氧空位被进一步认为是负责OV-Bi系2 ö 3表现出更高1 Ò 2在光照射下产生与1 ö 2作为唯一的活性氧簇（ROS）比的Bi 2 ö 3与1 ö 2，H 2 O 2等作为ROS。研究了苯甲基硫醚选择性光氧化为苯甲基亚砜和苯醇为苯甲醛的光催化活性。在这两种情况下，ov-Bi 2 O 3的性能都比Bi 2 O 3更好，表明氧空位在调节光催化氧化性能中起着重要作用。这项工作为获得单线态氧提供了另一种方法，它可以指导光催化剂的进一步设计，以高效率和对光催化有机合成的选择性。
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