Electrodeposition nanofabrication of carboxylated carbon nanotubes/α-MnO2 nanorods/ polypyrrole composites as high hybrid capacitance electrodes for efficient U(VI) electrosorption

•Electrodeposition nanofabrication of carboxylated carbon nanotubes/α-MnO2 nanorods/ polypyrrole electrodes for U(VI) electrosorption.•The obtained electrode provides high hybrid specific capacitance, good conductivity and hydrophilicity.•Electrosorption mechanism is dominated by hybrid capacitive adsorption and complexation.•CMP-0.10 presents highest specific capacitance and best U(VI) electrosorption performance.