Flexible chemical removing dissolved oxygen from water by nano-palladium hybrid microgel filled membrane

In de-oxygen water preparation, it is still a challenge to develop a highly efficient catalyst with less pollution on produced water. Herein, we invented a novel catalytic membrane, in which palladium nanoparticles were well dispersed and exposed sufficiently to the fluid with the help of hydrophilic polymer networks. These catalytic membranes created by dynamic filtration and reversible fixation offer exceptional flexibility in preparation and application. An apparatus for flexible and continuous chemical removal of dissolved oxygen from water was built up and applied to determine the performance of catalytic membranes. When the residence time was 32.3 s, the concentration of DO could be reduced to 10 ppb by a tri-layer catalytic membrane at ambient temperature. This uniquely configured catalytic membrane could be applied in portable and flexible DO requirements, such as experimental setups and pretreatment of instruments.