Fabrication of a novel 3D E-Fe2O3-Pi-MoS2 film with highly enhanced carrier mobility and photoelectrocatalytic activity. (20th March 2020)

• Record Type: Journal Article
• Authors: Cong, Yanqing; Ding, Wenchen; Zhang, Wenhua; Zhang, Tongtong; Wang, Qi; Zhang, Yi
• Is Part Of: Electrochimica acta. Volume 337(2020)
• Publication Date: 2020-03-20
• Subjects: Photoelectrocatalytic -- E-Fe2O3-Pi-MoS2 -- Visible light -- Water oxidation -- Organic pollutants; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2020.135748
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: A novel 3D E-Fe2 O3 -Pi-MoS2 film was fabricated for water oxidation and environmental remediation. The nonmetal doping with phosphorus and vertically oriented MoS2 nanosheets were successfully constructed on Fe2 O3 substrate, and the electrochemical modification further enhanced its photoelectrocatalytic (PEC) activity. The photocurrent density of E-Fe2 O3 -Pi-MoS2 for water oxidation was 30 times or 19.4 times higher than that of Fe2 O3 under visible light or UV–vis light illumination at 0.45 V vs. Ag/AgCl, respectively. E-Fe2 O3 -Pi-MoS2 film also showed excellent PEC activity for phenol degradation (93.73%) and good stability. Hydroxyl radicals and holes were main active species. The remarkable activity of E-Fe2 O3 -Pi-MoS2 film could be attributed to the synergistic effects of nonmetal doping with phosphorous, vertically oriented MoS2 nanosheets fabrication and the electrochemical modification treatment, which significantly improved the charge transfer and enhanced the separation efficiency of photogenerated carriers. This work provides an effective, environmentally friendly, and low-cost semiconductor materials for sustainable energy and environmental application. Graphical abstract: Image 1 Highlights: E-Fe2 O3 -Pi-MoS2 film was synthesized by impregnation and hydrothermal method. The nonmetal-P and vertically oriented MoS2 were constructed on Fe2 O3 film. A facile electrochemical treatment leads to remarkably enhanced PEC performance. Enhanced carrier mobility and slower recombination rate were achieved. E-Fe2 O3 -Pi-MoS2 film exhibited excellent PEC activity and stability.