Preparation and Characterization of PAM‐b‐DOPOAA by ATRP

Abstract

Polyacrylamide has been a hot topic of research in recent years, however, the preparation of block copolymers of polyacrylamide using ATRP method has been little studied. In this paper, polyacrylamide with reactive group bromine (PAM−Br) was synthesized by atom transfer radical polymerization (ATRP) using acrylamide (AM) as the monomer and water as the solvent, and polyacrylamide was used as the macromolecular initiator for the next reaction step. Then 9,10‐dihydro‐9‐oxa‐10‐phosphafi‐10‐oxide (DOPO) was organically modified to obtain acrylate monomers with DOPO functional groups (DOPOAA), and a mixture of water and N, N‐dimethylformamide (DMF) was used as the solvent to obtain PAM‐b‐DOPOAA block copolymers with controllable molecular mass and narrow molecular mass distribution. The effects of the molecular mass of the macromolecular initiator, polymerization time, and the molar ratio of catalyst to the ligand on the polymerization process were investigated. The structure and properties of the products were also characterized by 1H‐NMR, FTIR, XPS, DSC, TG, etc. The PAM‐b‐DOPOAA prepared by ATRP method can artificially design the length and ratio of the two chain segments, realizing one additive with two functions and the permanent existence of the function of polymer additives.

Construction of heterostructured BiVO4-{010}/Ag plasmonic photocatalysts by multi-object synchronous optimization of the microstructure of BiVO4 for significantly enhanced visible light driven photocatalytic performance

“…The Ag nanoparticles are anchored on the surface of BiVO 4 and can remarkably improve the photocatalytic performance of pure BiVO 4 . [58][59][60] In the constructed BiVO 4 /Ag plasmonic photocatalyst, a Schottky barrier is formed between the two components and promotes the separation and migration of the photogenerated charge. The absorption of light can be enhanced by adjusting the shape and/or size of Ag nanoparticles to produce a surface plasmon resonance (SPR) effect.…”