In-situ Synthesis of p-n (BiO)4CO3(OH)2/Bi2O2CO3 Internal Polarized Heterojunction for Improved Visible Light Photocatalytic Performance
In-situ Synthesis of p-n (BiO)4CO3(OH)2/Bi2O2CO3 Internal Polarized Heterojunction for Improved Visible Light Photocatalytic Performance
复制标题
原位合成 p-n (BiO)4CO3(OH)2/Bi2O2CO3 内极化异质结以提高可见光光催化性能
DOI：
10.1088/2053-1591/ab62ec
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发表时间：
2020
影响因子：
2.3
通讯作者：
Changdong Chen
中科院分区：
文献类型：
--
作者：
Zizhu Xu;Fangfang Wang;Jing Zhang;Xuebing Chen;Changdong Chen
P-n type (BiO)4CO3(OH)2/Bi2O2CO3 internal polarized heterojunction was prepared via an in situ photosynthesis method and characterized using x-ray diffraction (XRD), scanning electron microscopy (SEM),UV–vis diffuse reflectance spectra (UV–vis DRS) and surface photovoltage (SPV). The results indicate that phase transition process of β-Bi2O3 → Bi2O2CO3 → (BiO)4CO3(OH)2 can be regulated by controlling the photosynthesis time. With increasing of reaction time, CO3 2− in Bi2O2CO3 structures is replaced by polar OH−, and the two-dimensional (2D) heterostructure of (BiO)4CO3(OH)2/Bi2O2CO3 is fabricated. The photocatalytic activities of the junction were investigated by degradation of tetrachlorophenol (4-CP) under the visible light illumination. The enhanced photocatalytic activity of (BiO)4CO3(OH)2/Bi2O2CO3 has been attributed to the synergetic effect between intrinsic internal electric field (IEF) and charge separation for a photocatalyst with p-n heterojunction structures. Moreover, h+ and centerdotOH are proved working as the main active species for the degradation performence. It shows great potential in application for wastewater treatment.
