Title : Nanoscale platinum particles at nanostructured carbon materials for catalytic reduction of endocrine disruptors
As a new class of functional nanostructures, hairy carbon nanotubes (CNTs) consisting of CNTs-grafted chelatant polymers have attracted considerable attention in designing of metallic nanoparticles platforms. These metal NPs-based nanohybrids exhibit remarkable catalytic activity and recyclability.
In this work we developed a new strategy to prepare functional hairy CNTs for immobilizing nanoscale platinum particles, combining in situ photoinduced SI-ATRP and thiol-yne photo-triggered click reaction. To do this, we have followed a four-step procedure: (i) use of in situ generated diazonium compound to functionalize CNTs by OH-terminated aryl layers; (ii) grafting of bromine ATRP initiator via a nucleophilic substitution reaction, (iii) growing of clickable poly(propargyl methacrylate), PPGM chains from bromine-functionalized CNTs, (iv) grafting of mercaptosuccinic acid via a photoactivated thiol-yne reaction providing chelatant CNT platforms, and (v) in situ generation of platinum NPs on the nanostructured CNTs. The as-platinum nanoparticles decorated CNT-PPGM-SCOOH, served as stable and reusable catalysts for the complete transformation of nitroaromatic endocrine disruptors.
This synthetic approach based on combination of photo-induced SI-ATRP and thiol-yne click chemistry can be used as a general procedure for the controlled design of stable and high-performance novel nanostructured multifunctional platforms.