Synthesis of novel Au@Void@Nb2O5 core–shell nanocomposites with enhanced photocatalytic activity

2018 ◽  
Vol 47 (10) ◽  
pp. 3400-3407 ◽  
Author(s):  
Jiaquan Bai ◽  
Jiao Xue ◽  
Runwei Wang ◽  
Zongtao Zhang ◽  
Shilun Qiu
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Core Shell ◽  
Gel Method ◽  
Sol Gel Method

Novel Au@Void@Nb2O5 core–shell nanocomposites have been fabricated through a facile sol–gel method exhibiting efficient photocatalytic performance and excellent durability.

scholarly journals Visible-enhanced photocatalytic performance of CuWO4/WO3 hetero-structures: incorporation of plasmonic Ag nanostructures

2018 ◽  
Vol 42 (13) ◽  
pp. 11109-11116 ◽  
Author(s):  
R. Salimi ◽  
A. A. Sabbagh Alvani ◽  
N. Naseri ◽  
S. F. Du ◽  
D. Poelman
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Light Irradiation ◽  
Photo Degradation ◽  
Gel Method ◽  
Sol Gel Method

A new plasmonic Ag hybridized CuWO4/WO3 heterostructured nanocomposite was successfully synthesized via a ligand-assisted sol gel method and the photocatalytic activity was evaluated by photo-degradation of methylene blue (MB) under visible light irradiation.

scholarly journals New insights into the photocatalytic activity of 3-D core–shell P25@silica nanocomposites: impact of mesoporous coating

2017 ◽  
Vol 46 (15) ◽  
pp. 4994-5002 ◽  
Author(s):  
Yichao Gong ◽  
Dan Ping Wang ◽  
Renbing Wu ◽  
Sarifuddin Gazi ◽  
Han Sen Soo ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Sol Gel ◽  
Core Shell ◽  
Gel Method ◽  
Sol Gel Method ◽  
Silica Nanocomposites ◽  
Surfactant Assisted

Core–shell TiO2 (P25)–mesoporous SiO2 nanocomposites was prepared via a surfactant-assisted sol–gel method.

Synthesis of Ag/ZnO Nanocomposite with Excellent Photocatalytic Performance via a Facile Sol-Gel Method

2014 ◽  
Vol 875-877 ◽  
pp. 251-256 ◽  
Author(s):  
Lin Sun ◽  
Rong Shao ◽  
Lan Qin Tang ◽  
Zhi Dong Chen
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Calcination Temperature ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Bet Surface Area ◽  
Molar Ratio ◽  
Gel Method ◽  
Sol Gel Method ◽  
Ft Ir

Ag/ZnO nanocomposite photocatalysts with high photocatalytic performance were successfully synthesized via a facile sol-gel method. The prepared Ag/ZnO products were characterized by XRD, SEM, EDS, FT-IR, BET surface area, TG and DSC. Photodegradation experiments of the samples were carried out by choosing Methylene Blue (MB) as a model target under UV irradiation with homemade photocatalytic apparatus. Among these products, when the molar ratio of Ag to ZnO was fixed at 0.07 and the calcination temperature was around 450 °C, the obtained samples exhibited the highest photocatalytic activity.

Photocatalytic Performance of ZnO Prepared by Sol-Gel Method with the Assistance of CTAB

2014 ◽  
Vol 881-883 ◽  
pp. 256-259
Author(s):  
Hua Fang ◽  
Wei Wu ◽  
Zhun Huang
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Cetyltrimethylammonium Bromide ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Bet Method

ZnO photocatalyst was prepared by sol-gel method with the assistance of cetyltrimethylammonium bromide (CTAB). The specific surface area and structure were characterized by Brunauer-Emmett-Teller (BET) method and X-ray diffraction (XRD), respectively. The photocatalytic activity of ZnO prepared for decolorization of methyl orange (MO) aqueous solution was evaluated. The results show that ZnO (mol ratio of ZnO/CTAB is 10) baked at 500°C holds the best photocatalytic activity.

scholarly journals Preparation and Photocatalytic Performance of Nano-TiO2Codoped with Iron III and Lanthanum III

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
Wei Guan ◽  
Fangying Ji ◽  
Zhigang Xie ◽  
Rongan Li ◽  
Nan Mei
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Kinetic Studies ◽  
Effective Technique ◽  
Gel Method ◽  
Sol Gel Method ◽  
First Order ◽  
Photocatalytic Activities ◽  
Nanoscale Titanium Dioxide

Nanoscale titanium dioxide (nano-TiO2) was modified via metal doping to improve its photocatalytic activity and utilization of visible light. Nano-TiO2doped with iron III (Fe3+) only, lanthanum III (La3+) only, and both Fe3+/La3+was prepared using the sol-gel method. The photocatalytic activities of the three forms of doped nano-TiO2were evaluated. Metal codoping limited crystal growth of crystal, and the sol-gel method was shown to be an effective technique for doping the lattice of TiO2with Fe3+and La3+. Codoping of nano-TiO2with the tombarthite metal mixture had a synergistic effect of the photocatalytic performance, with the codoped nano-TiO2exhibiting a performance greater than the sum of those of the single-doped nano-TiO2samples. Kinetic studies showed that the photodegradation reaction of methyl orange by nano-TiO2follows the Langmuir-Hinshelwood first order mechanism.

Modification mechanism of praseodymium doping for the photocatalytic performance of TiO2: a combined experimental and theoretical study

2015 ◽  
Vol 17 (29) ◽  
pp. 19087-19095 ◽  
Author(s):  
Zhi-Gang Duan ◽  
Zong-Yan Zhao ◽  
Qing-Nan Shi
Keyword(s):  
Crystal Structure ◽  
Photocatalytic Activity ◽  
Optical Absorption ◽  
Photocatalytic Performance ◽  
Theoretical Study ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Phase Crystal ◽  
Praseodymium Doping

Pr-doped TiO2 with a mono-phase crystal structure was prepared by a sol–gel method. Crystal structure, binding information, optical absorption, and photocatalytic activity were systematically investigated

Green Synthesis of Cobalt Oxide Nanoparticles by a Starch-Assisted Method

2019 ◽  
Vol 9 (3) ◽  
pp. 362-370 ◽  
Author(s):  
D. Vaya ◽  
Meena ◽  
B.K. Das
Keyword(s):  
Photocatalytic Activity ◽  
Cobalt Oxide ◽  
Sol Gel ◽  
Complex Nature ◽  
Oxide Nanoparticles ◽  
Capping Agent ◽  
Chemical Route ◽  
Gel Method ◽  
Sol Gel Method ◽  
Cobalt Oxide Nanoparticles

Background: The properties of the material are altered when material size shifted towards nano-regime. This feature could be used for wastewater treatment process using model pollutant such as dyes. Recently, nanoparticles are synthesized by a green chemical route using different capping agents. This is the reason we adopt starch as green capping agent along with sol-gel method. Objective: To synthesize cobalt oxide nanoparticles by green chemical route and utilized it in degradation of dyes. Methods: Synthesis of cobalt oxide nanoparticles by sol-gel method using starch as a capping agent. The characteristics of surface modifications were investigated by UV-VIS, TEM, SEM, XRD and FTIR techniques. Results: Cobalt oxide nanoparticles synthesized and inhibited photocatalytic activity. Conclusion: Deactivation of photocatalytic activity due to complex nature of starch. This property can be used elsewhere as in light shielding applications to coat and protect surfaces in order to keep them cool and safe from damage as in the painting of vehicles, roofs, buildings, water tanks, etc.

Cytotoxicity of Thermoresponsive Core/Shell NixCo1-xFe2O4/PEG Nanoparticles Synthesized by Sol-gel Method

2021 ◽  
Author(s):  
Amirhossein Esmaeilkhanian ◽  
Fariborz Sharifianjazi ◽  
Nader Parvin ◽  
Mohammad Amin Koti
Keyword(s):  
Sol Gel ◽  
Core Shell ◽  
Gel Method ◽  
Sol Gel Method

scholarly journals Magnetic PbFe12O19-TiO2 nanocomposites and their photocatalytic performance in the removal of toxic pollutants

2018 ◽  
Vol 41 (3-4) ◽  
pp. 53-62 ◽  
Author(s):  
Behnaz Lahijani ◽  
Kambiz Hedayati ◽  
Mojtaba Goodarzi
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
Gel Method ◽  
Sol Gel Method ◽  
Photocatalytic Effect ◽  
Transmission Electron ◽  
Ultraviolet Light Irradiation

Abstract In this work, the PbFe12O19 nanoparticles were prepared by the simple and optimized precipitation method with different organic surfactants and capping agents. In the next step, the TiO2 nanoparticles were synthesized using the sol-gel method. At the final step, the PbFe12O19-TiO2 nanocomposites were prepared via the sol-gel method. The effect of the precipitating agent on the morphology and particle size of the products was investigated. The prepared products were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and Fourier transform infrared spectroscopy. The results obtained by the vibrating sample magnetometer show the magnetic properties of the ferrite nanostructures. The photocatalytic effect of the PbFe12O19-TiO2 nanocomposite on the elimination of the azo dyes (acid black, acid violet and acid blue) under ultraviolet light irradiation was evaluated. The results indicate that the prepared nanocomposites have acceptable magnetic and photocatalytic performance.

scholarly journals Bismuth Oxide Prepared by Sol-Gel Method: Variation of Physicochemical Characteristics and Photocatalytic Activity Due to Difference in Calcination Temperature

2020 ◽  
Vol 21 (1) ◽  
pp. 108
Author(s):  
Yayuk Astuti ◽  
Brigita Maria Listyani ◽  
Linda Suyati ◽  
Adi Darmawan
Keyword(s):  
Photocatalytic Activity ◽  
Band Gap ◽  
Calcination Temperature ◽  
Bismuth Oxide ◽  
Sol Gel ◽  
Physicochemical Characteristics ◽  
Band Gap Energy ◽  
Gel Method ◽  
Sol Gel Method ◽  
Body Center Cubic

Research on synthesis of bismuth oxide (Bi2O3) using sol-gel method with varying calcination temperatures at 500, 600, and 700 °C has been done. This study aims to determine the effect of calcination temperature on the characteristics of the obtained products which encompasses crystal structure, surface morphology, band-gap energy, and photocatalytic activity for the decolorization of methyl orange dyes through its kinetic study. Bismuth oxide prepared by sol-gel method was undertaken by dissolving Bi(NO3)3·5H2O and citric acid in HNO3. The mixture was stirred then heated at 100 °C. The gel formed was dried in the oven and then calcined at 500, 600, and 700 °C for 5 h. The obtained products were a pale yellow powder, indicating the formation of bismuth oxide. This is confirmed by the existence of Bi–O and Bi–O–Bi functional groups through FTIR analysis. All three products possess the same mixed crystal structures of α-Bi2O3 (monoclinic) and γ-Bi2O3 (body center cubic), but their morphologies and band gap values are different. The higher the calcination temperature, the larger the particle size and the smaller the band gap value. The accumulative differences in characteristics appoint SG700 to have the highest photocatalytic activity compared to SG600 and SG500 as indicated by its percent degradation value and decolorization rate constant.

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