A reclaimed piezoelectric catalyst of MoS2@TNr composites as high-performance anode materials for supercapacitors. Issue 63 (22nd October 2020)

• Record Type: Journal Article
• Authors: Zhao, Xiaona; Lei, Yuanchao; Liu, Gang; Qian, Libing; Zhang, Xiaowei; Ping, Yunjie; Li, Hongjing; Han, Qing; Fang, Pengfei; He, Chunqing
• Is Part Of: RSC advances. Volume 10:Issue 63(2020)
• Page Start: 38715
• Page End: 38726
• Publication Date: 2020-10-22
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d0ra06532c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A piezoelectric catalyst of the MoS2 @TNr composite (MoS2 nanosheets composited with TiO2 nanorods) was synthesized by a two-step hydrothermal method, and can be recycled and reused as an advanced anode material for supercapacitors. Abstract : A piezoelectric catalyst of the MoS2 @TNr composite (MoS2 nanosheets composited with TiO2 nanorods) was synthesized by a two-step hydrothermal method, and can be recycled and reused as an advanced anode material for supercapacitors. In the dark, the MoS2 @TNr composite exhibited ultra-fast piezoelectric catalytic performance and good cycle stability on dye degradation; within 10 min, nearly all rhodamine B (50 mL, 20 ppm) was removed from the solution with the assistance of magnetic stirring. After the 5 cycle degradation reaction, the catalyst was reclaimed and applied to electrochemical testing, which showed better supercapacitor capacitance properties than the fresh catalyst due to the introduction of oxygen vacancies generated from the piezoelectric degradation process. The reclaimed catalyst demonstrated an excellent specific capacitance of 249 F g −1 at 1 A g −1, and 92% capacitance retention after 10 000 cycles. Furthermore, as the current density increased to 30 A g −1, the capacitance could maintain 58% of the initial value. Thus, it can be concluded that the abandoned catalysts may serve as a potential electrode material for energy storage; simultaneously, the reutilization could eliminate secondary pollution and decrease the energy consumption in efficiency.