Synergy of Oxygen Vacancy and Piezoelectricity effect Promotes the CO2 Photoreduction by BaTiO3
Synergy of Oxygen Vacancy and Piezoelectricity effect Promotes the CO2 Photoreduction by BaTiO3
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DOI：
10.1016/j.apsusc.2023.156773
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发表时间：
2023-02
影响因子：
6.7
通讯作者：
Weihua Cai;Xinyu Ma;Jin Chen;R. Shi;Yabo Wang;Yawei Yang;D. Jing;Hudie Yuan;Jing Du;Meidan Que
中科院分区：
文献类型：
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作者：
Weihua Cai;Xinyu Ma;Jin Chen;R. Shi;Yabo Wang;Yawei Yang;D. Jing;Hudie Yuan;Jing Du;Meidan Que
人们一直致力于开发高效的可见光驱动光催化剂，用于将CO2转化为清洁燃料。然而，CO2的光还原受到不足的表面活性位点和无效的电子-空穴对分离的阻碍。在此，我们探索小麦标题钛酸钡具有高比表面积和压电性，以促进其体电荷分离。同时，制备的氧空位扩大了麦穗状BaTiO 3的可见光吸收范围，增加了活性位，从而提高了其光催化降解CO2的性能。在小麦型BaTiO 3-X（X = 0，0.5，1.0，1.5，2.0）催化剂中，BaTiO 3 -1.5对CO的光催化性能最好，在光下为6.41 μmol·g-1，在光和超声下为9.17 μmol·g-1，分别是小麦型BaTiO 3的3.22倍和1.86倍。这种协同策略为压电性能和表面缺陷工程提供了新的思路，同时强调了表面性能在提高CO2转化性能方面的重要性。
Great efforts have been devoted to developing efficient visible-light-driven photocatalysts for the conversion CO2into clean fuels. Nevertheless, the photoreduction of CO2is hampered by inadequate surface-active sites and ineffective electron-hole pair separation. Herein, we explore the wheat-heading BaTiO3with high surface area and piezoelectricity to facilitating their bulk charge separation. Meanwhile, oxygen vacancies were fabricated to extending the visible light absorption range and increasing the active sites of the wheat-heading BaTiO3, thus promoting the photocatalytic performance of CO2. Among the wheat-heading BaTiO3-X (X = 0, 0.5, 1.0, 1.5, 2.0) catalysts, BaTiO3-1.5 affords the optimal photocatalytic performance of CO, 6.41 μmol·g−1under light, 9.17 μmol·g−1under light and ultrasound, which were 3.22 and 1.86 times higher for pristine wheat-heading BaTiO3, respectively. This synergetic strategy sheds a new light on piezoelectric properties and surface defect engineering, while emphasizing the importance of surface properties in enhancing CO2conversion performance.