光催化
异质结
原位
材料科学
氧气
纳米技术
化学工程
光电子学
化学
催化作用
有机化学
工程类
作者
Yu Zhang,Fengyan Ma,Ziqi Yang,Meihua Ling,Hong Zheng,Junru Zhu,Yan Yu,Li Li
摘要
Design of chemically bonded heterojunction with oxygen vacancies is a serviceable method to facilitate the performance of metal-organic framework (MOFs). Herein, Bi–MOF as bismuth source and frame, chemically bonded close-contact Bi/BiOBr@Bi–MOF heterojunction with intact backbone were successfully developed by two-step easy in-situ halogenation and photoreduction of Bi–MOF. The halide amount and photoreduction time regulate the BiOBr and metal Bi loading amount and oxygen defects concentration. Bi/BiOBr@Bi–MOF-5-1 revealed the best photocatalytic efficiency (rate constant) of 97.1% (0.0607 min–1) toward chlortetracycline (CTC) after full-spectrum light irradiation for 60 min. The rate constants were 7.2, 2.2, and 2.2 times higher than Bi–MOF, BiOBr, and Bi/BiOBr-5 without MOF structure, respectively, which is owing to the synergistic effect among Bi–MOF framework, OVs, and Z-scheme heterojunction by chemically bonding with metal Bi as carrier transfer bridge. This study provides a broad prospect for reasonable design and flexible synthesis of semiconductor/MOF heterojunction with Bi–MOF as nice precursor.
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