Template-free synthesis of ternary sulfides submicrospheres as visible light photocatalysts by ultrasonic spray pyrolysis

2012 ◽  
Vol 2 (9) ◽  
pp. 1825 ◽  
Author(s):  
Jianhui Huang ◽  
Wahkit Cheuk ◽  
Yifan Wu ◽  
Frank S. C. Lee ◽  
Wingkei Ho
Keyword(s):  
Visible Light ◽  
Spray Pyrolysis ◽  
Ultrasonic Spray Pyrolysis ◽  
Ultrasonic Spray ◽  
Template Free

BiVO4as a Visible-Light Photocatalyst Prepared by Ultrasonic Spray Pyrolysis

2009 ◽  
Vol 113 (28) ◽  
pp. 11980-11983 ◽  
Author(s):  
Scott S. Dunkle ◽  
Richard J. Helmich ◽  
Kenneth S. Suslick
Keyword(s):  
Visible Light ◽  
Spray Pyrolysis ◽  
Ultrasonic Spray Pyrolysis ◽  
Visible Light Photocatalyst ◽  
Ultrasonic Spray

scholarly journals Fabrication of Bi-DopedTiO2Spheres with Ultrasonic Spray Pyrolysis and Investigation of Their Visible-Light Photocatalytic Properties

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Jianhui Huang ◽  
Wahkit Cheuk ◽  
Yifan Wu ◽  
Frank S. C. Lee ◽  
Wingkei Ho
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Spray Pyrolysis ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance Spectroscopy ◽  
Ultrasonic Spray Pyrolysis ◽  
X Ray ◽  
Ultrasonic Spray ◽  
Doped Titania

Bismuth-doped TiO2submicrospheres were synthesized by ultrasonic spray pyrolysis. The prepared bismuth-doped titania was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-visible diffuse reflectance spectroscopy (UV-vis DRS), and X-ray photoelectron spectroscopy (XPS). Aqueous photocatalytic activity was evaluated by the decomposition of methyl orange under visible-light irradiation. The results indicate that doping of bismuth remarkably affects the phase composition, crystal structure, and the photocatalytic activity. The sample with 2% Bi exhibits the optimum photocatalytic activity.

scholarly journals Preparation of Ga0.25Zn4.67S5.08 Microsphere by Ultrasonic Spray Pyrolysis and Its Photocatalytic Disinfection Performance under Visible Light

2019 ◽  
Vol 2019 ◽  
pp. 1-9
Author(s):  
Tuo Yan ◽  
Jianhui Huang ◽  
Jinhong Bi ◽  
Liyan Xie ◽  
Huimin Huang
Keyword(s):  
Visible Light ◽  
Spray Pyrolysis ◽  
Dominant Role ◽  
Ultrasonic Spray Pyrolysis ◽  
Active Species ◽  
E Coli ◽  
Radical Trapping ◽  
Antibacterial Performance ◽  
Ultrasonic Spray ◽  
Study Results

The Ga0.25Zn4.67S5.08 catalysts were prepared by ultrasonic spray pyrolysis with thiourea as a precursor. The crystal structure, optical properties, specific surface area, chemical composition, surface morphology, and internal structure of the prepared samples were characterized by XRD, UV-Vis DRS, BET, XPS, SEM, and TEM, respectively. The disinfection performance and the main active species of the synthesized catalysts under visible light irradiation were investigated with E. coli K12. The study results indicate that Ga0.25Zn4.67S5.08 prepared at 400°C exhibited the best antibacterial performance with complete kill of E. coli K12 within 4 h. The antibacterial performance of the prepared sample is also higher than that prepared by the hydrothermal method. The result of the radical trapping experiment indicates that the photogenerated holes play a dominant role in the disinfection process.

Spherical SrMoO4:Eu3+ Phosphors Prepared by Spray Pyrolysis

2014 ◽  
Vol 924 ◽  
pp. 93-97 ◽  
Author(s):  
Jing Long Wu ◽  
Xia Wang ◽  
Gui Hua Peng ◽  
Zhen Hua Liang ◽  
Xiao Feng Wang
Keyword(s):  
Spray Pyrolysis ◽  
Ultrasonic Spray Pyrolysis ◽  
Emission Spectra ◽  
Spherical Shape ◽  
Ammonium Molybdate ◽  
Spray Pyrolysis Method ◽  
Strontium Nitrate ◽  
Ultrasonic Spray ◽  
One Step ◽  
Template Free

SrMoO4:Eu3+ micro-spheres with well morphology were fabricated by a one-step and template-free ultrasonic spray pyrolysis method using strontium nitrate and ammonium molybdate as precursors. The as-prepared products were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence spectra (PL). The XRD results indicate that all the XRD peaks can be indexed as SrMoO4 with a pure tetragonal scheelite structure. The SEM photographs show that the sample particles are spheres with regular spherical shape. The excitation and emission spectra demonstrate that the phosphors could be excited effectively by the ultraviolet light with wavelength 394 nm or visible blue light with wavelength 466 nm, and the highest emission peak locates at 615 nm.

scholarly journals Efficient Visible Light Photocatalytic Oxidation of NO on F- and N-Codoped SphericalTiO2Synthesized via Ultrasonic Spray Pyrolysis

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Jianhui Huang ◽  
Wahkit Cheuk ◽  
Yifan Wu ◽  
Frank S. C. Lee ◽  
Wingkei Ho
Keyword(s):  
Electron Microscopy ◽  
Visible Light ◽  
Spray Pyrolysis ◽  
Photoelectron Spectroscopy ◽  
Photocatalytic Oxidation ◽  
Diffuse Reflectance Spectroscopy ◽  
Ultrasonic Spray Pyrolysis ◽  
Spray Pyrolysis Method ◽  
X Ray ◽  
Ultrasonic Spray

The fluorine- and nitrogen-codoped TiO2was synthesized by ultrasonic spray pyrolysis method with titanium tetrafluoride and urea as precursor. The codoped TiO2was characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), diffuse reflectance spectroscopy (DRS), and X-ray photoelectron spectroscopy (XPS). Nitric oxide (NO) photocatalytic oxidation in gas-phase medium was employed as a probe reaction to evaluate the photocatalytic reactivity of the catalysts. The results indicated that spherical codoped TiO2photocatalysts with unique puckered surface were obtained by this method. The codoped catalysts have solely anatase crystalline structure. The optical characterization of the codoped catalysts showed that the codoped samples could be excited by visible light photons in the 400–550 nm and could efficiently oxidize NO under visible light irradiation. The mechanism of special morphology formation of prepared codoped TiO2structure is also discussed.

Surface modification of submicronic TiO2 particles prepared by ultrasonic spray pyrolysis for visible light absorption

2012 ◽  
Vol 14 (10) ◽  
Author(s):  
Ivan M. Dugandžić ◽  
Dragana J. Jovanović ◽  
Lidija T. Mančić ◽  
Nan Zheng ◽  
Scott P. Ahrenkiel ◽  
...  
Keyword(s):  
Surface Modification ◽  
Visible Light ◽  
Spray Pyrolysis ◽  
Light Absorption ◽  
Ultrasonic Spray Pyrolysis ◽  
Visible Light Absorption ◽  
Tio2 Particles ◽  
Ultrasonic Spray
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