Dataset Information

Graphitic carbon nitride nanosheet electrode-based high-performance ionic actuator.

ABSTRACT: Ionic actuators have attracted attention due to their remarkably large strain under low-voltage stimulation. Because actuation performance is mainly dominated by the electrochemical and electromechanical processes of the electrode layer, the electrode material and structure are crucial. Here, we report a graphitic carbon nitride nanosheet electrode-based ionic actuator that displays high electrochemical activity and electromechanical conversion abilities, including large specific capacitance (259.4 F g(-1)) with ionic liquid as the electrolyte, fast actuation response (0.5±0.03% in 300 ms), large electromechanical strain (0.93±0.03%) and high actuation stability (100,000 cycles) under 3 V. The key to the high performance lies in the hierarchical pore structure with dominant size <2 nm, optimal pyridinic nitrogen active sites (6.78%) and effective conductivity (382 S m(-1)) of the electrode. Our study represents an important step towards artificial muscle technology in which heteroatom modulation in electrodes plays an important role in promoting electrochemical actuation performance.

SUBMITTER: Wu G

PROVIDER: S-EPMC4458862 | biostudies-literature | 2015 Jun

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

Graphitic carbon nitride nanosheet electrode-based high-performance ionic actuator.

Wu Guan G Hu Ying Y Liu Yang Y Zhao Jingjing J Chen Xueli X Whoehling Vincent V Plesse Cédric C Nguyen Giao T M GT Vidal Frédéric F Chen Wei W

Nature communications 20150601

Ionic actuators have attracted attention due to their remarkably large strain under low-voltage stimulation. Because actuation performance is mainly dominated by the electrochemical and electromechanical processes of the electrode layer, the electrode material and structure are crucial. Here, we report a graphitic carbon nitride nanosheet electrode-based ionic actuator that displays high electrochemical activity and electromechanical conversion abilities, including large specific capacitance (25 ...[more]

PMID: 26028354

Similar Datasets

Project description:Highlights • Nitrogen-defective porous ultrathin g-C3N4 nanosheets (DUCN) were prepared.• DUCN exhibited high photocatalytic inactivation performance toward E. coli and B. subtilis.• Ultrathin nanosheets structure enhanced the interaction between photocatalysts and bacteria.• Nitrogen defects reduced charge recombination and improved H2O2 generation.• Good stability in consecutive photocatalytic inactivation experiments. The efficient generation and utilization of ROSs is a key step in determining the achievement of safe drinking water by photocatalytic bacterial inactivation technology. Although graphitic carbon nitride (g-C3N4) serves as a green and promising photocatalyst for water disinfection, insufficient bacterial capturing capacity and serious charge recombination of pristine g-C3N4 extremely restrict its bactericidal activity. Herein, we develop a facile thermal exfoliation and thermal polymerization method to prepare the nitrogen-defective ultrathin g-C3N4 nanosheets (DUCN-500). Our results showed that ultrathin nanosheet structure greatly enhanced bacterial capturing capacity of g-C3N4 to increase the utilization efficiency of ROS, which contributed to the performance of DUCN-500 greatly outperforming bulk g-C3N4. The nitrogen defects increased ROS generation (·O2− and H2O2) by approximately 4.6 times, which was attributed to negative shift of the conduction band potential and rapid separation of charge carriers. The DUCN-500 could rapidly and completely inactivate Escherichia coli and Bacillus subtilis in real sewage under simulated solar irradiation, accompanied by good anti-interference capability and stability. Additionally, bacterial morphology destruction, the loss of antioxidant enzyme activity and the leakage of protein were proven to be the main mechanisms of photocatalytic sterilization. This study offers new insight into the rational design of efficient g-C3N4-based photocatalysts for water disinfection. Graphical abstract Image, graphical abstract

Dataset Information

Graphitic carbon nitride nanosheet electrode-based high-performance ionic actuator.

Publications

Graphitic carbon nitride nanosheet electrode-based high-performance ionic actuator.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets