On the selective oxidation of H2S by heavy loaded Nanoparticles Embedded in Mesoporous Matrix (NEMMs)

Nickel Phosphide Nanoparticles for Selective Hydrogenation of SO2 to H2S

“…The injection of TOP or TOPO at high temperatures was also used as an effective morphology adjustment approach ( m-Ni 5 P 4 , h-Ni 5 P 4 , and p-Ni 5 P 4 ). SiO 2 is usually considered as an inert and stable support, and mesoporous SiO 2 can serve as a frame for the confinement of the Ni x P y crystal growth and aggregation, thus providing an effective size control pathway ( n-Ni 5 P 4 @SiO 2 , u-Ni 5 P 4 @SiO 2 , and u-Ni 5 P 4 @SiO 2 -l ). ,, …”

“…Transition metal phosphides (TMP) have an excellent capacity and good application prospect for hydrodesulfurization (HDS) reaction. A typical activity of TMPs on the field of HDS is following the order of Fe 2 P < CoP < MoP < WP < Ni 2 P. , While several studies have demonstrated the importance of the active material size on the adsorption/catalytic activity, , the impact of the crystal phase, morphology, and size on HDS catalysis by TMPs is not well-understood. The liquid-phase synthesis in oleylamine (OAm) with trioctylphosphine (TOP) is an effective approach allowing for a fine control over the morphology and phase of metal phosphide nanoparticles. , Owing to the high boiling point and its controllable complexation property with metals, OAm can act having a triple role, e.g., that of a surfactant agent, a solvent medium, and a reducing agent and stabilizer for the synthesis of metal phosphide nanoparticles, while TOP can serve as the P source as well as the surfactant and solvent …”

“…To have a better morphology control of the Ni 5 P 4 phase, several efforts have been made based on the morphology control of the Ni precursor, while the Ni 5 P 4 particle size is in the range of hundreds of nanometers. − To get the Ni 5 P 4 particle bellow 10 nm is very difficult. As the formation of the Ni 5 P 4 phase in OAm takes place at above 350 °C, at this temperature, the small Ni 5 P 4 nanoparticles always aggregate and grow into large particles (with a diameter up to hundreds of nanometers). − , Recently, a new approach was reported by our group toward the development of “Nanoparticles Embedded in Mesoporous Matrix (NEMM)” catalysts . This methodology provides a tool toward the fine control of important characteristics of a catalyst, such as size, morphology, and active phase loading on the mesoporous matrix (e.g., silica).…”

Ni2P Nanoparticles Embedded in Mesoporous SiO2 for Catalytic Hydrogenation of SO2 to Elemental S

“…Recently, a new approach in the synthesis of catalysts termed the nanoparticles embedded in mesoporous matrix (NEMM) approach was demonstrated by our group . This approach allows for fine control over the size, morphology, and loading of the active phase within the mesoporous matrix, leading to loadings up to 82 wt % and controllable sizes down to 2 nm.…”

Facile Organometallic Synthesis of Fe-Based Nanomaterials by Hot Injection Reaction

“…Colloidal magnetic nanoparticles, with well-defined morphology and dimensionality, are of primary importance for both fundamental studies and prospective applications in many technological areas including magnetic storage devices [ 1 , 2 ], ferrofluids [ 3 , 4 , 5 ], magnetic resonance imaging [ 6 , 7 , 8 , 9 , 10 ], drug delivery [ 11 , 12 , 13 , 14 ], bio-separation [ 15 , 16 , 17 ], hyperthermia [ 18 , 19 , 20 , 21 , 22 ], sensing [ 23 , 24 , 25 ], and catalysis [ 26 , 27 , 28 , 29 ]. Amongst them iron-based magnetic materials including iron oxides [ 30 , 31 , 32 ], metallic iron [ 33 , 34 , 35 ], and iron alloys [ 36 , 37 , 38 ] have been extensively studied for many decades.…”