Preparation of PdNPs doped chitosan-based composite hydrogels as highly efficient catalysts for reduction of 4-nitrophenol

Exploring the enhanced catalytic performance on nitro dyes via a novel template of flake-network Ni-Ti LDH/GO in-situ deposited with Ag3PO4 NPs

Facile preparation and highly efficient photodegradation performances of self-assembled Artemia eggshell-ZnO nanocomposites for wastewater treatment

In this work, a new nanocomposite based on octa-amino polyhedral oligomeric silsesquioxanes (POSS), carbon nanotubes (CNTs), and chitosan (CS) was synthesized and used for wastewater treatment. The...

Facile Preparation of Self-Assembled Chitosan-Based POSS-CNTs-CS Composite as Highly Efficient Dye Absorbent for Wastewater Treatment.

Facile preparation of self-assembled black phosphorus-based composite LB films as new chemical gas sensors

Extraction-like removal of organic dyes from polluted water by the graphene oxide/PNIPAM composite system

The invention discloses a preparation method and application of hydrogel for removing pollutants on the surface of a base material, and belongs to the field of environmental protection. The method comprises the following steps: coating the surface of a polluted base material with a sodium alginate (SA) aqueous solution with the concentration of 1-4 wt%, and then uniformly spraying a calcium chloride (CaCl2) solution with the concentration of 1-4 wt% on the surface to promote crosslinking of the SA component to form a hydrogel film. The surface pollutants can enter the hydrogel film by means ofdissolution, adsorption and the like, and then the hydrogel film is peeled off from the surface, so that the pollutants on the surface of the base material are effectively removed. Meanwhile, graphene oxide (GO) or ethylenediamine tetraacetic acid (EDTA) and other active adsorption components can be added into the SA solution and are mixed to prepare a uniformly dispersed thick solution; then surface coating is conducted, the CaCl2 solution is sprayed to induce formation of the hydrogel film, and the removal effect of the hydrogel film on pollutants is improved through the strong adsorption effect provided by the GO or EDTA.

Wei Qiang

Papers

Extraction-like removal of organic dyes from polluted water by the graphene oxide/PNIPAM composite system

Peelable hydrogel for removing surface contaminants