Insight into the mechanism of photocatalytic degradation of gaseous o-dichlorobenzene over flower-type V2O5 hollow spheres

2015 ◽  
Vol 3 (29) ◽  
pp. 15163-15170 ◽  
Author(s):  
Baojun Liu ◽  
Xinyong Li ◽  
Qidong Zhao ◽  
Jie Liu ◽  
Shaomin Liu ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Hollow Spheres ◽  
Hollow Microspheres ◽  
Carbon Sphere ◽  
Flower Type ◽  
Type V ◽  
Insight Into

The flower-type V2O5 hollow microspheres with assistance of carbon-sphere templates were fabricated and applied to photocatalytic degradation of gaseous o-DCB.

scholarly journals Unexpected Link between the Template Purification Solvent and the Structure of Titanium Dioxide Hollow Spheres

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 112
Author(s):  
Tamás Gyulavári ◽  
Kata Kovács ◽  
Klára Magyari ◽  
Kornélia Baán ◽  
Anna Szabó ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Phase Composition ◽  
Anatase Phase ◽  
Hollow Spheres ◽  
Rutile Phase ◽  
Carbon Sphere ◽  
Carbon Spheres ◽  
Carbonate Species ◽  
Determining Factor

Carbon spheres were applied as templates to synthesize titanium dioxide hollow spheres. The templates were purified with either ethanol or acetone, and the effects of this treatment on the properties of the resulting titania were investigated. The photocatalytic activity of the catalysts was measured via the decomposition of phenol model pollutant under visible light irradiation. It was found that the solvent used for the purification of the carbon spheres had a surprisingly large impact on the crystal phase composition, morphology, and photocatalytic activity. Using ethanol resulted in a predominantly rutile phase titanium dioxide with regular morphology and higher photocatalytic activity (r0,phenol = 3.9 × 10−9 M∙s−1) than that containing mainly anatase phase prepared using acetone (r0,phenol = 1.2 × 10−9 M∙s−1), surpassing the photocatalytic activity of all investigated references. Based on infrared spectroscopy measurements, it was found that the carbon sphere templates had different surface properties that could result in the appearance of carbonate species in the titania lattice. The presence or absence of these species was found to be the determining factor in the development of the titania’s properties.

Electrochemical performance and electronic properties of shell LiNi0.5Mn1.5O4 hollow spheres for lithium ion battery

2016 ◽  
Vol 09 (02) ◽  
pp. 1650027 ◽  
Author(s):  
Yongli Cui ◽  
Jiali Wang ◽  
Mingzhen Wang ◽  
Quanchao Zhuang
Keyword(s):  
Activation Energy ◽  
Electrochemical Performance ◽  
Electronic Properties ◽  
Lithium Ion Battery ◽  
Retention Rate ◽  
Hollow Spheres ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Hollow Microspheres ◽  
Cycle Stability

Shell spinel LiNi[Formula: see text]Mn[Formula: see text]O4 hollow microspheres were successfully synthesized by MnCO3 template, and characterized by XRD, SEM, and TEM. The results show that the hollow LiNi[Formula: see text]Mn[Formula: see text]O4 cathode has good cycle stability to reach 124.5, 119.8, and 96.6[Formula: see text]mAh/g at 0.5, 1, and 5 C, the corresponding retention rate of 98.1%, 98.2%, and 98.0% after 50 cycles at 20[Formula: see text]C, and the reversible capacity of 94.6[Formula: see text]mAh/g can be obtained at 1 C rate at 55[Formula: see text]C, 83.3% retention after 100 cycles. As the temperature decreases from 10[Formula: see text]C to [Formula: see text]C, the resistance of [Formula: see text] increases from 5.5 [Formula: see text] to 135 [Formula: see text], [Formula: see text] from 27 [Formula: see text] to 353.2 [Formula: see text], and [Formula: see text] from 12.7 [Formula: see text] to 73.0 [Formula: see text]. Moreover, the B constant and [Formula: see text] activation energy are 4480[Formula: see text]K and 37.22[Formula: see text]KJ/mol for the NTC spinel material, respectively.

Large-scale synthesis of Au–WO3 porous hollow spheres and their photocatalytic properties

2017 ◽  
Vol 7 (17) ◽  
pp. 3702-3706 ◽  
Author(s):  
Chenying He ◽  
Xia Li ◽  
Yahui Li ◽  
Junfang Li ◽  
Guangcheng Xi
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Organic Pollutants ◽  
Hybrid Materials ◽  
Large Scale ◽  
Hollow Spheres ◽  
Photocatalytic Properties ◽  
Excellent Activity ◽  
Visible Light Photocatalytic

Uniform Au–WO3 porous hollow spheres have been synthesized on a large-scale by a general in situ reaction. The hybrid materials exhibit excellent activity for visible-light photocatalytic degradation of organic pollutants.

Hierarchical flower-like Bi2WO6 hollow microspheres: facile synthesis and excellent catalytic performance

RSC Advances ◽  
2015 ◽  
Vol 5 (29) ◽  
pp. 23080-23085 ◽  
Author(s):  
Peigen Zhang ◽  
Jian Zhang ◽  
Anjian Xie ◽  
Shikuo Li ◽  
Jiming Song ◽  
...  
Keyword(s):  
Hollow Spheres ◽  
Catalytic Performance ◽  
Hollow Microspheres ◽  
Solvothermal Process ◽  
Facile Synthesis ◽  
Step Method ◽  
Bismuth Tungstate ◽  
One Step ◽  
Excellent Catalytic Performance

A one step method has been developed for the fabrication of hierarchical flower-like bismuth tungstate (Bi2WO6) hollow spheres via a solvothermal process.

Superhydrophobic, highly adhesive arrays of copper hollow spheres produced by electro-colloidal lithography

Soft Matter ◽  
2017 ◽  
Vol 13 (33) ◽  
pp. 5500-5505 ◽  
Author(s):  
Damien Bazin ◽  
Chrystel Faure
Keyword(s):  
Chemical Modification ◽  
Electric Fields ◽  
Hollow Spheres ◽  
Hollow Microspheres ◽  
Colloidal Lithography ◽  
Adhesive Properties

Arrays of copper hollow microspheres produced under electric fields display anti-wetting and super-adhesive properties without resorting to any chemical modification.

A novel electrochemical immunoassay for carcinoembryonic antigen based on glucose oxidase-encapsulated nanogold hollow spheres with a pH meter readout

The Analyst ◽  
2018 ◽  
Vol 143 (21) ◽  
pp. 5271-5277 ◽  
Author(s):  
Yu Jiang ◽  
Zhiying Su ◽  
Jian Zhang ◽  
Meijiao Cai ◽  
Lili Wu
Keyword(s):  
Carcinoembryonic Antigen ◽  
Glucose Oxidase ◽  
Signal Amplification ◽  
Hollow Spheres ◽  
Electrochemical Immunosensor ◽  
Hollow Microspheres ◽  
Electrochemical Immunoassay

A portable electrochemical immunosensor was designed for the detection of CEA on a pH meter by using glucose oxidase-encapsulated gold hollow microspheres for signal amplification.

Effect of organic solvents on the growth of TiO2 nanotubes: An insight into photocatalytic degradation and adsorption studies

2020 ◽  
Vol 37 ◽  
pp. 101491 ◽  
Author(s):  
Muhammad Zulfiqar ◽  
Sujan Chowdhury ◽  
Mohammad Fakhrul Ridhwan Samsudin ◽  
Ahmer Ali Siyal ◽  
Abdul Aziz Omar ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Organic Solvents ◽  
Tio2 Nanotubes ◽  
Adsorption Studies ◽  
Insight Into

scholarly journals Synthesis of TiO2/Pd and TiO2/PdO Hollow Spheres and Their Visible Light Photocatalytic Activity

2020 ◽  
Vol 2020 ◽  
pp. 1-9 ◽  
Author(s):  
Jing Yan ◽  
Xiaojuan Li ◽  
Bo Jin ◽  
Min Zeng ◽  
Rufang Peng
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Diffuse Reflectance Spectroscopy ◽  
Hollow Spheres ◽  
Active Species ◽  
Degradation Efficiency ◽  
Diffraction Field ◽  
Transmission Electron

A series of TiO2, TiO2/Pd, and TiO2/PdO hollow sphere photocatalysts was successfully prepared via a combination of hydrothermal, sol-immobilization, and calcination methods. The structure and optical properties of the as-prepared samples were characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, Brunauer-Emmett-Telleranalysis, Barrett-Joyner-Halenda measurement, and UV-Vis diffuse reflectance spectroscopy. The photocatalysis efficiencies of all samples were evaluated through the photocatalytic degradation of rhodamine B under visible light irradiation. Results indicated that TiO2/PdO demonstrated a higher photocatalytic activity (the photocatalytic degradation efficiency could reach up to 100% within 40 min) than the other samples and could maintain a stable photocatalytic degradation efficiency for at least four cycles. Finally, after using different scavengers, superoxide and hydroxyl radicals were identified as the primary active species for the effectiveness of the TiO2/PdO photocatalyst.

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