Rapid microwave-assisted synthesis and electrochemical characterization of gold/carbon nanotube composites

Microwave-Assisted Preparation of Inorganic Nanostructures in Liquid Phase

“…In recent years, some researchers have adopted ternary and multinary solvent systems for the microwave-assisted preparation of a variety of inorganic nanostructures, including Au, Ag, ZnO, α-Fe 2 O 3 , γ-Fe 2 O 3 , Fe 3 O 4 , Co 3 O 4 , TiO 2 , CeO 2 , ZrO 2 , ZnS, Ag 2 S, CdSe, , CdTe, pnictogen chalcogenide, SrTi 1– x Cr x O 3 , MFe 2 O 4 (M = Ni, Co, Mn), AlOOH, AlOOH:Tb 3+ , aluminum hydroxyfluoride, NaGdF 4 :Ln 3+ (Ln = Yb, Er/Tm/Ho), Eu 3+ -doped HAP, zeolite, Au/carbon nanotubes, TiO 2 /graphene, Pt/WO 3 /C, Pt/polypyrrole, La 2 O 3 /BaCO 3 , CdSe/graphene, CdSe/ZnS, , and ZnO/ZnS/γ-Fe 2 O 3 …”

Synthesis and Physicochemical Properties of Gold‐based Catalysts

“…11,156,157 It is used to assist gold reduction by ethylene glycol in the presence of a carbon support: the dielectric constant and the dielectric loss of ethylene glycol are high, so reduction occurs rapidly under microwave irradiation. For instance, HAuCl 4 in ethylene glycol was added to a suspension of carbon nanotubes (CNTs) dispersed in a mixture of oleylamine and oleic acid under microwave irradiation with power adjustment to set the temperature at 180 1C.…”

“…For instance, HAuCl 4 in ethylene glycol was added to a suspension of carbon nanotubes (CNTs) dispersed in a mixture of oleylamine and oleic acid under microwave irradiation with power adjustment to set the temperature at 180 1C. 11 After cooling, washing and drying, particles of 5-10 nm were obtained with few agglomerated nanoparticles. Active sites were supposed to have been created on the surface of CNTs under microwaving, to ensure the nucleation of gold nanoparticles.…”

“…Note that the use of carbon nanotubes, single-and multi-wall, as supports for gold catalysts is quite recent. [8][9][10][11][12][13] In these last years, other new materials have also emerged as supports for gold catalysts: grapheme, 14,15 carbides, 16,17 polymers, [18][19][20][21][22][23] porous coordination polymers (PCPs) or metal-organic frameworks (MOFs), 20,[24][25][26][27] and specific oxides such as clays, [28][29][30] hydrotalcites [31][32][33][34] and hydroxyapatites. [35][36][37][38] One can distinguish three types of preparation method: those involving the deposition of a metal precursor followed by thermal reduction or other means, i.e.…”

Preparation of gold clusters on metal oxides by deposition-precipitation with microwave drying and their catalytic performance for CO and sulfide oxidation

“…Microwave (MW) heating possesses some unique properties such as rapid, internal, and uniform heating. MW has been used for the formation of Au NPs [23] and the preparation of supported Au catalysts [24][25][26][27][28][29][30][31][32][33][34]. Simultaneous reduction of Au(III) to Au(0) NPs and their deposition onto supports under MW irradiation has been performed in the co-presence of Au(III), supports, reductants, and/or protecting agents [24][25][26][27][28][29][30].…”