纳米片
光催化
压电
材料科学
极化(电化学)
纳米技术
光电子学
极地的
失真(音乐)
降级(电信)
化学工程
化学
复合材料
催化作用
工程类
电子工程
有机化学
物理化学
天文
物理
放大器
CMOS芯片
作者
Huiqin Ma,Weiyi Yang,Shuang Gao,Wanrong Geng,Yuan-Ming Lu,Chenkun Zhou,Jian Ku Shang,Tao Shi,Qi Li
标识
DOI:10.1016/j.cej.2022.140471
摘要
The internal polarizations of polar photocatalysts could be enhanced through unit cell structure modulations to improve their photocatalytic performances. In this work, a simple, robust and low-cost NaOH etching process is developed to treat ultrathin Bi2WO6 nanosheets after their creation, resulting in a higher degree of polyhedron distortion (∼141 %) and an enhanced piezoelectricity (∼260 % the maximum effective piezoelectric coefficient d33). Compared with pristine ultrathin Bi2WO6 nanosheets, these etched samples demonstrate an improved charge carrier separation and transfer behavior due to their enhanced internal polarization with the assistance of richer oxygen vacancies, which largely enhance their piezocatalysis (∼4.6 times), photocatalysis (∼14.3 times) and especially coupled photopiezocatalysis (∼33.9 times) performances as demonstrated in their sulfamethoxazole (SMX) degradation performances. ·O2–, 1O2 and h+ are proven to be main reactive oxygen species (ROSs) during their photopiezocatalytic process and they could also work well in the real water matrix.
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