Rh-Doped SrTiO3 inverse opal with piezoelectric effect for enhanced visible-light-driven photodegradation of bisphenol A,Environmental Science: Nano

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Rh-Doped SrTiO3 inverse opal with piezoelectric effect for enhanced visible-light-driven photodegradation of bisphenol A
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2020-06-16 , DOI: 10.1039/c9en01483g
Qian Zhou _{1,

2,

3,

4,

5} , Qingyun Shi _{1,

2,

3,

4,

5} , Najun Li _{1,

2,

3,

4,

5} , Dongyun Chen _{1,

2,

3,

4,

5} , Qingfeng Xu _{1,

2,

3,

4,

5} , Hua Li _{1,

2,

3,

4,

5} , Jinghui He _{1,

2,

3,

4,

5} , Jianmei Lu _{1,

2,

3,

4,

5}

Affiliation

Coupling the piezoelectric effect of piezoelectric semiconductors with the photocatalytic technique is considered as a promising strategy for suppressing the recombination of photogenerated charge carriers. A new piezo-photocatalyst, a Rh-doped SrTiO₃ inverse opal, was prepared by a hard-template method. Doping of photoactive Rh³⁺ played a significant role in improving the visible-light response ability and piezo-/photocatalytic activity of SrTiO₃. In addition, the introduction of 3D ordered inverse opal structure was favourable for light harvesting. Co-excited by solar energy (visible light) and mechanical energy (ultrasonic vibration), the Rh-doped SrTiO₃ inverse opal showed a significantly enhanced degradation rate of bisphenol A, which was 8.9 times higher than that of SrTiO₃ nanoparticles under visible light only. The boosted piezo-photocatalytic efficiency was ascribed to the efficient separation of photogenerated electron–hole pairs under the acceleration of the built-in piezoelectric field in the Rh-SrTiO₃ inverse opal, as confirmed by piezoelectric force microscopy (PFM). Therefore, this work provided a new insight into SrTiO₃-based piezo-photocatalytic materials for efficient environmental remediation.

中文翻译：

掺铑的SrTiO3反蛋白石具有压电效应，可增强可见光驱动的双酚A的光降解

压电半导体的压电效应与光催化技术的耦合被认为是抑制光生载流子复合的一种有前途的策略。通过硬模板法制备了一种新型的压电光催化剂，即Rh掺杂的SrTiO ₃反蛋白石。掺杂光敏Rh ³⁺在提高SrTiO ₃的可见光响应能力和压电/光催化活性方面起着重要作用。此外，引入3D有序反蛋白石结构有利于光收集。Rh掺杂的SrTiO ₃被太阳能（可见光）和机械能（超声振动）共同激发。反蛋白石显示出双酚A的降解速率显着提高，仅在可见光下，降解速率比SrTiO ₃纳米颗粒高8.9倍。压电光催化效率的提高归因于Rh-SrTiO ₃反蛋白石中内置压电场的加速下光生电子-空穴对的有效分离，这已被压电力显微镜（PFM）证实。因此，这项工作为基于SrTiO ₃的压电光催化材料的高效修复提供了新的见识。

更新日期：2020-08-14

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