Fabrication of porous octahedron-flowerlike microsphere NH2-UiO-66/CdIn2S4 heterojunction photocatalyst for enhanced photocatalytic CO2 reduction. Issue 51 (September 2021)

• Record Type: Journal Article
• Authors: Hong, Long-fei; Guo, Rui-tang; Zhang, Zhong-wei; Yuan, Ye; Ji, Xiang-yin; Lin, Zhi-dong; Pan, Wei-guo
• Is Part Of: Journal of CO₂ utilization. Issue 51(2021)
• Publication Date: 2021-09
• Subjects: NH2-UiO-66 -- CdIn2S4 -- Metal organic framework -- Photocatalytic reduction of CO2; Carbon dioxide -- Periodicals; Carbon dioxide -- Environmental aspects -- Periodicals; Carbon dioxide mitigation -- Periodicals; Carbon dioxide; Carbon dioxide -- Environmental aspects; Carbon dioxide mitigation; Periodicals; 628.53205
• DOI: 10.1016/j.jcou.2021.101650
• Languages: English
• ISSNs: 2212-9820

Abstract

Graphical abstract: Highlights: NH2 -UiO-66/CdIn2 S4 composite exhibited superior CO2 photoreduction activity. NH2 -UiO-66/CdIn2 S4 could achieve the rapid separation of photoexcited e − /h + pairs. High CO2 molecules adsorption activity of NH2 -UiO-66/CdIn2 S4 composite. Abstract: Solar-driven carbon dioxide (CO2 ) photoreduction has been considered as an environmentally friendly and promising strategy to utilize solar energy and mitigate the impact of greenhouse effect. Designing novel cost-effective photocatalytic system with high CO2 molecules adsorption activity is an efficient avenue to enhance CO2 photoreduction performance. Herein, a series of NH2 -UiO-66/CdIn2 S4 (NU66/CIS) photocatalysts with different NU66 contents were constructed via facile in-situ hydrothermal route and displayed graceful morphology. According to a series of characterization results, porous octahedron NU66 were deeply anchored on flowerlike 3D-microspheres CIS, and a part of the small-sized CIS were evenly dispersed on the surface of NU66. Without any sacrificial agent, the optimized 8% NU66/CIS heterojunctions still exhibited the satisfactory photocatalytic efficiency for CO2 conversion, whose CO and CH4 yields reached up to 11.24 μ mol g −1 h −1 and 2.92 μ mol g −1 h −1, respectively, which were 2.87 and 3.31 folds higher than that of pristine CIS. The remarkably boosted activity of NU66/CIS was originated from the high specific surface area and the formation of heterostructure between the well-dispersed NU66 and CIS, which could promote the electron transfer during CO2 photocatalytic reduction.