ZnO-TiO2 Composite Material Prepared by Sol-Gel Method to Treat Pharmaceutical Wastewater

2013 ◽  
Vol 361-363 ◽  
pp. 736-739
Author(s):  
Xun Wang ◽  
Wei Wei Li ◽  
Yang Fan Xiao ◽  
Lei Zhu ◽  
Xiao Yan Liu
Keyword(s):  
Composite Material ◽  
Calcination Temperature ◽  
Irradiation Time ◽  
Sol Gel ◽  
Pharmaceutical Wastewater ◽  
Calcination Time ◽  
Composite Photocatalyst ◽  
Gel Method ◽  
Sol Gel Method ◽  
Doping Ratio

This research aims to treat pharmaceutical wastewater with the ZnO-TiO2composite material prepared by the sol-gel method. It examines and analyzes the causes and effects of ZnO‘s doping ratio, calcination temperature calcination time and irradiation time on ZnO-TiO2 composite photocatalyst material’s degradation of pharmaceutical wastewater. Both the undoped TiO2 test and the blank test are done for its reference and contrast.

Effect of Synthesis Conditions on the Preparation of Ag/ZnTiO3 via Sol-Gel Method and its Antibacterial Properties

2020 ◽  
Vol 1007 ◽  
pp. 47-51
Author(s):  
Huynh Tuyet Anh Le ◽  
Tuan Anh Nguyen ◽  
Ky Phuong Ha Huynh
Keyword(s):  
Ethylene Glycol ◽  
Calcination Temperature ◽  
Ph Value ◽  
Sol Gel ◽  
Antibacterial Properties ◽  
Calcination Time ◽  
Gel Method ◽  
Sol Gel Method ◽  
Synthesis Conditions ◽  
Antibacterial Materials

Antibacterial materials based on nanotechnology have been attracted considerable attention by the scientific community. In this study, the sol-gel method was applied to prepare of antibacterial materials from tetra-n-butyl orthotitanate, zinc nitrate and ethylenediamine tetraacetic acid (EDTA) as a complexing agent. The effects of the synthesis conditions on the properties of the Ag/ZnTiO3 samples such as the calcination temperature, the calcination time, pH value and ethylene glycol volume, were investigated. The obtained materials were characterized by powder X-ray diffraction (XRD) and their antibacterial activity against Staphylococcus aureus (S. Aureus) was evaluated. The results showed that the optimum conditions for Ag/ZnTiO3 synthesis were: calcination temperature of 650°C, calcination time of 2 h, pH value of 4.5 and ethylene glycol volume of 4.5 mL.

scholarly journals Irradiation Effects on The Sensitivity of ZnO Thin Films Synthesized on Glass Substrate by Sol-gel Method

2021 ◽  
pp. 130-137
Author(s):  
Yasir Yahya Kasim ◽  
Ghazwan Ghazi Ali ◽  
Marwan Hafeedh Younus
Keyword(s):  
Thin Films ◽  
Energy Gap ◽  
Irradiation Time ◽  
Sol Gel ◽  
Hexagonal Structure ◽  
Alpha Particles ◽  
Zno Thin Films ◽  
Optical Energy Gap ◽  
Gel Method ◽  
Sol Gel Method

This work investigates the structural, optical, and surface properties of ZnO thin films prepared by sol-gel method. The effect on waveguide sensor was examined at different irradiation durations of alpha particles. The X-ray diffraction (XRD) measurements revealed that the crystalline phase of ZnO thin films does not change after irradiation and showed a hexagonal structure of wurtzite type with an orientation toward (002). Moreover, ZnO thin films absorbance was increased with increasing irradiation time, whereas the transmittance was decreased. Additionally, increasing the irradiation time of alpha particles caused an increase in the extinction coefficient and the imaginary part,  while the optical energy gap of the ZnO samples was decreased. Finally, the maximum value of sensitivity was 42%, found at 6 min of irradiation duration.

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.

A bioactive composite material produced by the sol-gel method

1994 ◽  
Vol 29 (15) ◽  
pp. 4075-4080 ◽  
Author(s):  
S. M. Jones ◽  
S. E. Friberg ◽  
J. Sjöblom
Keyword(s):  
Composite Material ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method

TiO2 Nanotube Deposited in the Pores of Expanded Graphite by Microwave Irradiation

2011 ◽  
Vol 204-210 ◽  
pp. 278-282
Author(s):  
En Qiang Wang ◽  
Min Cong Zhu ◽  
Ying Chen Zhang ◽  
Deng Xin Li
Keyword(s):  
Microwave Irradiation ◽  
Sol Gel ◽  
Expanded Graphite ◽  
Composite Photocatalyst ◽  
Gel Method ◽  
Sol Gel Method ◽  
Temperature And Pressure

We prepared a composite photocatalyst of Stick TiO2nanorod loaded on expanded graphite(EG).The growth of TiO2in the pores of EG by sol–gel method under normal temperature and pressure was investigated. Results sugest that pores of the EG which can load catalyst particles (TiO2nanotube) is the physical base. Stick TiO2nanorod can be well loaded on EG to form EG/TiO2composite photocatalyst. So a unique process trying to load TiO2photocatalyst on EG to EG/TiO2composite photocatalyst was developed by us.

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