Photocatalytic CO2 Reduction to Ethanol by ZnCo2O4/ZnO Janus Hollow Nanofibers

被引：7

作者：

Ma, Hongyu ^{[1
,2
]}

Wu, Xi ^{[1
,2
]}

Li, Xinghua ^{[1
,2
]}

Liu, Jie ^{[1
,2
]}

Dong, Haipeng ^{[1
,2
]}

Liu, Yu ^{[1
,2
]}

Niu, Luyao ^{[1
,2
]}

Zhang, Fang ^{[1
,2
]}

Wang, Wenbo ^{[1
,2
]}

Shao, Changlu ^{[1
,2
]}

Li, Xiaowei ^{[1
,2
]}

Liu, Yichun ^{[1
,2
]}

机构：

[1] Northeast Normal Univ, Ctr Adv Optoelect Funct Mat Res, Minist Educ, Changchun 130024, Peoples R China

[2] Northeast Normal Univ, Key Lab UV Light Emitting Mat & Technol, Minist Educ, Changchun 130024, Peoples R China

来源：

INORGANIC CHEMISTRY | 2024年 / 63卷 / 34期

基金：

中国国家自然科学基金;

关键词：

METHANOL SYNTHESIS; ZNO; HETEROJUNCTION; PHOTOACTIVITY; HYDROGENATION; MICROSPHERES; CATALYSTS;

D O I：

10.1021/acs.inorgchem.4c01643

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Photocatalytic carbon dioxide (CO2) reduction for high-value hydrocarbon fuel production is a promising strategy to tackle global energy demand and climate change. However, this technology faces formidable challenges, primarily stemming from low yield and poor selectivity of C2 products of the desired hydrocarbon fuels. This study reported ZnO/ZnCo2O4 Janus hollow nanofibers (ZnO/ZCO JHNFs) prepared by electrospinning and atomic layer deposition. Photocatalytic tests revealed an ethanol yield of 4.99 mu mol g(-1) h(-1) for ZnO/ZnCo2O4 JHNFs, surpassing mixed ZnO/ZnCo2O4 nanofibers (ZnO/ZCO NFs) by 4.35 times and pure ZnO by 12.7 times. The selectivity of 58.8% is 2.38 and 4.49 times higher than those of ZnO/ZnCo2O4 NFs and ZnO, respectively. These enhancements are attributed to efficient carrier separation facilitated by the ordered internal electric field of the Z-scheme heterojunction interface, validated by the energy band evaluations from experimentation and density functional theory (DFT) simulations and charge separation characterizations of photocurrent, impedance, and photoluminescence spectra. The Janus structure also effectively exposes the surface of ZnCo2O4 to CO2 molecules, increasing the active site availability, as confirmed by BET nitrogen adsorption/desorption, temperature-programmed desorption tests, and DFT adsorption energy calculations. This study proposes a novel approach for efficient photocatalytic hydrocarbon fuel production, with potential applications in energy and climate crisis mitigation.

引用

页码：15735 / 15751

页数：17

共 90 条

[1] Phytogenic fabrication of ZnO and gold decorated ZnO nanoparticles for photocatalytic degradation of Rhodamine B [J].