Ultrathin bismuth oxyiodide nanosheets for photocatalytic ammonia generation from nitrogen and water under visible to near-infrared light

被引：38

作者：

Mohebinia, M. ^{[1
]}

Wu, C. ^{[2
,3
]}

Yang, G. ^{[1
]}

Dai, S. ^{[3
,4
]}

Hakimian, A. ^{[5
]}

Tong, T. ^{[3
]}

Ghasemi, H. ^{[5
]}

Wang, Z. ^{[2
]}

Wang, D. ^{[6
,7
]}

Ren, Z. ^{[6
,7
]}

Bao, J. ^{[1
,3
,6
,7
]}

机构：

[1] Univ Houston, Mat Sci & Engn, Houston, TX 77204 USA

[2] Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Sichuan, Peoples R China

[3] Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA

[4] Sichuan Univ, Coll Elect & Informat Engn, Chengdu 610065, Sichuan, Peoples R China

[5] Univ Houston, Dept Mech Engn, Houston, TX 77204 USA

[6] Univ Houston, Dept Phys, Houston, TX 77204 USA

[7] Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA

来源：

MATERIALS TODAY PHYSICS | 2021年 / 16卷 / 16期

关键词：

BiOI; Photocatalysis; N-2; fixation; Band edge position; Surface dipole; CAPPED GOLD NANOPARTICLES; N-2; FIXATION; BIOCL NANOSHEETS; WORK FUNCTION; ADSORPTION; SURFACE; DEGRADATION; PERFORMANCE; DINITROGEN; CLUSTERS;

D O I：

10.1016/j.mtphys.2020.100293

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Artificial photosynthesis of ammonia using atmospheric nitrogen and water is a sustainable but challenging alternative to the Haber-Bosch process. Bismuth oxyiodide (BiOI) is a promising candidate due to its superior light absorption capability (bandgap of around 1.8 eV) and abundant surface oxygen vacancies. However, its improper band edge positions made it inactive for overall water-splitting and N-2 fixation. In this work, ultrathin BiOI nanosheets were synthesized through a simple surfactant (PVP) assisted hydrothermal route. The nanosheets split pure water into H-2 and O-2 and converted nitrogen and water into ammonia under visible or near-infrared light. PVP capping not only reduced the thickness of BiOI sheets but also upshifted its band edge positions due to the surface electric dipole induced by polyvinyl pyrrolidone molecules on the BiOI surface, thus enabling the water oxidation and nitrogen reduction half reactions simultaneously. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：5

共 54 条

[1] Visible-light responsive BiOBr nanoparticles loaded on reduced graphene oxide for photocatalytic degradation of dye [J].