Reinforcing 2D Single‐Crystal Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> with Additional Interlayer Carbonates by CO<sub>2</sub>‐Assisted Solid‐to‐Solid Phase Transition
Bixia Yang, Weilong Dong, Chongbing Zhu, Xinlian Huang, Yunhui Han, Yanting Zheng, Jiawei Yan, Zanyong Zhuang, Yan Yu
Abstract
Abstract A facile gaseous CO 2 mediated solid‐to‐solid transformation principle is adopted to insert additional CO 3 2− anions into the thin single‐crystal nanosheets of Bi 2 O 2 CO 3 , which is built of periodic arrays of intrinsic CO 3 2− anions and (Bi 2 O 2 ) 2+ layers. The additional CO 3 2− anions create abundant defects. The Bi 2 O 2 CO 3 nanosheets with rich interlayer CO 3 2− exhibit superior electronic properties and charge transfer kinetics than the pristine single‐crystal 2D Bi 2 O 2 CO 3 and display enhanced catalytic activity in photocatalytic CO 2 reduction reaction and the photocatalytic oxidative degradation of organic pollutants. This work thus illustrates interlayer engineering as a flexible means to build layered 2D materials with excellent properties.