Enhancement of photocatalytic CO2 reduction for novel Cd0.2Zn0.8S@Ti3C2 (MXenes) nanocomposites. Issue 47 (May 2021)

• Record Type: Journal Article
• Authors: Saeed, Aamir; Chen, Wen; Shah, Abdul Hakim; Zhang, Yuyao; Mehmood, Ikhtisham; Liu, Yueli
• Is Part Of: Journal of CO₂ utilization. Issue 47(2021)
• Publication Date: 2021-05
• Subjects: Cd0.2Zn0.8S@Ti3C2 nanocomposites -- Photocatalytic reduction CO2 -- Solvothermal method -- Photocatalytic efficiency; 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.2021.101501
• Languages: English
• ISSNs: 2212-9820

Abstract

Graphical abstract: Plot of the reduction production of the samples vs. irradiation time for CO and Schematic diagram of the reduction mechanism through Cd0 .2 Zn0 .8 S@Ti3 C2 nanocomposites. Highlights: Cd0 .2 Zn0 .8 S/Ti3 C2 nanocomposites are synthesized by three-step solvethermal method at low temperature. Cd0 .2 Zn0 .8 S/Ti3 C2 nanocomposites display excellent photocatalytic reduction CO2 activity. Cd0 .2 Zn0 .8 S/Ti3 C2 nanocomposites exhibits high recycle stability. Abstract: In order to achieve global energy demand by sustainable energy development and grappling climate change, the ultimate plan is the reduction and conversion of carbon dioxide (CO2 ). However, in the field of photocatalytic reduction CO2, developing stable, low-cost, and efficient catalyst is still a significant challenge. A series of Cd0 .2 Zn0 .8 S@Ti3 C2 nanocomposites with different Ti3 C2 loading contents are prepared by three-step solvothermal method. Photocatalytic efficiencies of different Cd0.2 Zn0.8 S@Ti3 C2 nanocomposites under visible-light irradiation show that Cd0.2 Zn0.8 S@Ti3 C2 nanocomposite with 5 wt% of Ti3 C2 exhibits significant improvement in the photocatalytic performance of CO2 reduction, which shows significant CO (3.31 μmol h −1 g −1 ) and CH4 (3.51 μmol h −1 g −1 ) production rates. Such a considerable increase in the photocatalytic efficiency is due to an efficient electron-hole separation and transfer at the interface between Cd0 .2 Zn0 .8 S and Ti3 C2, which is confirmed by photoluminescence (PL) and electrochemical impedance spectroscopy (EIS). In addition, Cd0.2 Zn0.8 S@Ti3 C2 nanocomposites exhibit high cycling stability during the CO2 photocatalytic reduction, and the photocatalytic mechanism is also discussed.