Metal-alcohol coordination promoted reduction of bismuth (III) in bismuth-based semiconductors for enhanced photocatalytic activity

被引：14

作者：

Li, Haiping ^{[1
]}

Wang, Guoan ^{[1
]}

Deng, Quanhua ^{[1
,2
]}

Hu, Wenxuan ^{[1
]}

Hou, Wanguo ^{[1
]}

机构：

[1] Shandong Univ, Natl Engn Res Ctr Colloidal Mat, Sch Chem & Chem Engn, Jinan 250100, Shandong, Peoples R China

[2] Stanley fertilizer plain Co Ltd, Dezhou 253000, Shandong, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2024年 / 344卷

基金：

中国国家自然科学基金;

关键词：

Photocatalysis; Bismuth; Oxygen vacancy; Metal -alcohol coordination; Nitrogen fixation; OXYGEN VACANCIES; HOLLOW MICROSPHERES; NITROGEN-FIXATION; NANOSHEETS;

D O I：

10.1016/j.apcatb.2023.123652

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Metal ion doping is an extensively researched method to enhance photocatalytic activity of bismuth-based semiconductors, but function of the metal ions need be further clarified. Herein, metal-alcohol coordination was evidenced to promote reduction of Bi-III in Bi-based semiconductors (e.g., Bi2MoO6 hierarchical microspheres) to generated oxygen vacancies (Ovs) and Bi metal (Bi-0). Ovs and Bi-0, rather than widely recognized doping metal ions, play a key role for remarkable enhancement of photocatalytic activity of Bi2MoO6, for example of similar to 16-fold higher photocatalytic nitrogen reduction activity, which arises from that the Ovs and Bi-0 can enhance photoexcited charge separation and work as surface active sites. The Ovs possess much greater efficacy than the Bi-0. Formation of Bi-0 also induces prominent morphological variation of the microspheres. This work discloses an interesting but neglected phenomenon in alcohothermal synthesis of "metal-doped" Bi-based semiconductors and aims at drawing high attention of relevant researchers.

引用

页数：10