Carbon nanotubes ornamented hollow polymethyl methacrylate microspheres for turbidity removal from water

Poly(methyl methacrylate) Nanoparticles Grafted with Gold‐L‐Cysteine as a Water Cleaning Material for the Photocatalytic Degradation of Paracetamol

“…In fact, functionalization of the PMMA surface provided these polymers with more practical applications [14–16] . On the other hand, among a variety of metallic nanoparticles, gold has been used as an efficient catalyst in many reaction systems due to its environmental compatibility and its ability to inhibit or minimize the formation of free radicals during photodegradation of organic molecules and therefore avoid molecular chain recombination processes [17–20] . Moreover, L‐cysteine was used as an eco‐friendly reducing agent of the gold nanoparticles (AuNPs), instead of the sodium citrate, ascorbic acid, and sodium borohydride reducing agents which could contribute to environmental pollution [21–23] …”

“…[14][15][16] On the other hand, among a variety of metallic nanoparticles, gold has been used as an efficient catalyst in many reaction systems due to its environmental compatibility and its ability to inhibit or minimize the formation of free radicals during photodegradation of organic molecules and therefore avoid molecular chain recombination processes. [17][18][19][20] Moreover, Lcysteine was used as an eco-friendly reducing agent of the gold nanoparticles (AuNPs), instead of the sodium citrate, ascorbic acid, and sodium borohydride reducing agents which could contribute to environmental pollution. [21][22][23] In the present work, we hereby propose a successful strategy to activate the PMMA surface by grafting an amino acid, L-cysteine (C 3 H 7 NO 2 S), that can provide the strong electron donor functional groups: amine (À NH 2 ), carboxylic (À COOH), and thiol (À SH) to reduce gold ions in solution and attach the resulting gold nanoparticles to the surface of the polymer nanospheres.…”