title: Ultrasonic-assisted synthesis of highly dispersed MoO3 nanospheres using 3-mercaptopropyltrimethoxysilane.
abstract: With ultrasonic irradiation as assistance, highly dispersed MoO(3) nanospheres were synthesized using silane coupling agent 3-mercaptopropyltrimethoxysilane HS-(CH(2))(3)Si(OCH(3))(3) (MPTS) as figuration agent. The results of X-ray powder diffractometer (XRD) showed that the precursor was hexagonal molybdenum oxide hydrate (MoO(3).0.55H(2)O). It was converted into orthorhombic MoO(3) after annealed at 400 degrees C for 2h. Transmission electron microscopy (TEM) showed that MoO(3).0.55H(2)O and MoO(3) nanoparticles were spherical with particle-size distribution of ca. 30-80 nm and 25-75 nm, respectively. Results indicated that MPTS and ultrasonic irradiation played important role in formation of highly dispersed MoO(3) nanospheres. X-ray photoelectron spectroscopy (XPS) was also adopted to confirm the growth mechanism. The possible cause of formation was based on dispersion function of ultrasonic irradiation and figuration of MPTS.
authors.affiliation: National Laboratory of Superhard Materials, Jilin University, Changchun, 130012 Jilin, PR China.
authors.forename: Kai
authors.initials: K
authors.lastname: Du
authors.forename: Wuyou
authors.initials: W
authors.lastname: Fu
authors.forename: Ronghui
authors.initials: R
authors.lastname: Wei
authors.forename: Haibin
authors.initials: H
authors.lastname: Yang
authors.forename: Jing
authors.initials: J
authors.lastname: Xu
authors.forename: Lianxia
authors.initials: L
authors.lastname: Chang
authors.forename: Qingjiang
authors.initials: Q
authors.lastname: Yu
authors.forename: Guangtian
authors.initials: G
authors.lastname: Zou
mesh_terms: D002621:Chemistry / Q000379:methods; D046529:Microscopy, Electron, Transmission; D008982:Molybdenum / Q000737:chemistry*; D054118:Nanospheres / Q000737:chemistry*; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods*; D017646:Organosilicon Compounds; D010087:Oxides / Q000737:chemistry; D012821:Silanes / Q000737:chemistry*; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors; D014050:Toluene / Q000737:chemistry; D014465:Ultrasonics; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D017646:Organosilicon Compounds; D010087:Oxides; D012821:Silanes; D013438:Sulfhydryl Compounds; D014867:Water; C082290:molybdenum trioxide; D014050:Toluene; D008982:Molybdenum; C102833:(3-mercaptopropyl)trimethoxysilane; C022175:ammonium molybdate