Gold nanoparticles prepared using polyethylenimine adsorbed onto montmorillonite

Influence of Polyethyleneimine Addition on Crystal Size Distribution of Au Nanocrystals

“…For further discussion, the influence of the molecular weight of PEI will be mainly focused on. PEI is a reducer of AuCl 4 -as well as a precipitation stabilizer [49][50][51][52]. Thus, no reducing agents and/or stabilizing polymers are required in our case.…”

Recent Advances in Metal Nanoparticles Stabilization into Nanopores of Montmorillonite and Their Catalytic Applications for Fine Chemicals Synthesis

“…Chemical-reducing agents like dimethyl aminoborane, tetrahydrofuran, and ligands with suitable reducing functional groups are also reported for preparing different metals (Pd, Rh, Au, Ag, Ni) nanoparticles supported in interlayer space of layered silicates like montmorillonite (241)(242)(243)(244)(245). preparation of Rh metal nanoparticles in the interlayers of montmorillonite involving tailoring particle growth, preventing aggregation by the addition of neutral and ionic polymers and reduction by NaBH 4 .…”

Layered double hydroxides decorated with Au-Pd nanoparticles to photodegradate Orange II from water

“…One of the main drawbacks with nanoparticles lies in the fact that they cannot be reused, unless it is supported on a substrate for their reusability. Among the various supports studied such as metal oxides (TiO 2 , CeO 2 , Fe 2 O 3 , ZrO 2 , Al 2 O 3 , ZnO and SiO 2 ) (Zhen and Sheng, 2011), carbon materials (Tan et al, 2009, Muszynski et al, 2008 (carbon nanotubes, carbon fibers, and graphene sheet), and clays (montmorillonite, laponite, sepiolate, and kaolinite) (Chen and Kuo, 2006, Nakamura and Mori, 2001, Zhu et al, 2009, LDH have also attracted a great deal of interest in recent years bidimensional support for nanoparticles because of its inherent properties. For instance, gold nanoparticles were successfully immobilized on LDH using different strategies in-situ reduction (Varade and Haraguchi, 2012), homogenous deposition precipitation (Zhang et al, 2011), polyol reduction (Ballarin et al, 2011), calcination-reconstruction (Carja et al, 2013 to develop efficient catalyst for epoxidation of styrene, electrooxidation of methanol, and hydrogen generation.…”