Preparation and Characterization of Photocatalytic TiO2/CdS Nanocomposite Loaded on Multi-Walled Carbon Nanotues (MWCNTs)

2012 ◽  
Vol 184-185 ◽  
pp. 1114-1119
Author(s):  
Ou Yang Ke ◽  
Xie Shan ◽  
Xiao Ou Ma
Keyword(s):  
Sol Gel ◽  
Pure Tio2 ◽  
Anatase Tio2 ◽  
Solar Irradiation ◽  
Simulated Solar Light ◽  
Solar Light Irradiation ◽  
Cubic Phases ◽  
Composite Photocatalysts ◽  
Simulated Solar Irradiation

Multi-walled carbon nanotues (MWCNTs)/TiO2/CdS composite photocatalysts were prepared by sol–gel method in order to investigate its photocatalytic activity under simulated solar irradiation. MWCNTs/TiO2/CdS composite photocatalysts were characterized by the methods of SEM, XRD, TG and UV–vis. The results showed that MWCNTs/TiO2/CdS composites were mainly composed of anatase-TiO2 and little CdS cubic phases. the composite can cause an pronounced red shift of UV–vis spectra compared with pure TiO2. The degradation of MO by MWCNTs/TiO2/CdS composite photocatalysts under simulated solar light irradiation was studied. The results showd that the presence of MWCNTs and CdS can enhance the photoefficiency of TiO2.

Enhanced photocatalytic activity of (Mo, C)-codoped anatase TiO2 nanoparticles for degradation of methyl orange under simulated solar irradiation

2010 ◽  
Vol 25 (12) ◽  
pp. 2392-2400 ◽  
Author(s):  
Pengyu Dong ◽  
Bin Liu ◽  
Yuhua Wang ◽  
Huanhuan Pei ◽  
Shu Yin
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Energy Gap ◽  
Adsorption Property ◽  
Sol Gel ◽  
Anatase Tio2 ◽  
Solar Irradiation ◽  
Sol Gel Process ◽  
Simulated Solar Irradiation ◽  
Degradation Of Methyl Orange

C-doped, Mo-doped, and (Mo, C)-codoped TiO2 photocatalysts were prepared by a sol-gel process. The photocatalytic activity was evaluated by the photocatalytic degradation of methyl orange (MO) under simulated solar irradiation. Results indicated that both monodoped and codoped TiO2 exhibited better visible light absorption behavior and narrower energy gap than pure TiO2, and codoped TiO2 showed a slightly higher adsorption property in the dark because of higher Brunauer–Emmett–Teller-specific surface area. The photocatalytic activity of monodoped TiO2 was also enhanced, and the (0.04% Mo, C)-codoped sample had the best photocatalytic activity for degrading MO among all of the samples. The reason can be ascribed to the synergistic effect due to Mo and C doping. Furthermore, the transfer pathways of photoinduced carriers and photocatalytic reaction mechanism of (Mo, C)-codoped TiO2 was first investigated.

Synthesis and Characterization of Sm-Ho-CeO2 Compounds Produced by Different Synthesis Methods

2021 ◽  
Vol 43 (3) ◽  
pp. 314-314
Author(s):  
Ahmet Hamdi BAKIR and Handan ZL TORUN Ahmet Hamdi BAKIR and Handan ZL TORUN
Keyword(s):  
Room Temperature ◽  
Sol Gel ◽  
Stable Phase ◽  
Total Conductivity ◽  
Synthesis Methods ◽  
X Ray ◽  
Ceramic Electrolyte ◽  
Cubic Phases ◽  
Hydrothermal Methods

The most important part of a solid oxide fuel cell is the ceramic electrolyte. In this study, cerium oxide (CeO2) was used as the ceramic electrolyte, and different dopant types were used to increase total conductivity. In this study, the most commonly used Sm, and the less frequently used Ho elements were doped simultaneously. As a result, the effect of dope and different synthesis methods on electrolyte properties was evaluated. Three rates were studied with the total amount of Sm-Ho being 20%. The effect of the dopant types on conductivity with critical radius effect was investigated. These dope types were placed in a CeO2 crystal lattice by using the sol-gel and hydrothermal methods. After synthesis, the stable phase was obtained at room temperature. X-ray powder diffraction (XRD) was used for phase determination. The thermogravimetry (TG) determined mass change. Scanning electron microscopy (SEM) was used in the analysis of surface morphology. Total conductivity measurements were measured by the four-probe dc method. After synthesis processes, cubic compounds were obtained. The total conductivity values of the cubic phases samples obtained by two different synthesis methods were compared. The highest conductivity was observed in the sol-gel compounds. The highest electrical conductivity Ce0.80Sm0.10Ho0.10O2 system sol- gel; 6.92x10-3(Ωcm)1- at 655 oC. It was found that the compound obtained as a result of the evaluations could be used ceramic electrolyte application.

Nonmetal–metal–semiconductor-promoted P/Ag/Ag2O/Ag3PO4/TiO2 photocatalyst with superior photocatalytic activity and stability

2015 ◽  
Vol 3 (34) ◽  
pp. 17858-17865 ◽  
Author(s):  
Xiaohong Hu ◽  
Qi Zhu ◽  
Xinlong Wang ◽  
Naoki Kawazoe ◽  
Yingnan Yang
Keyword(s):  
Photocatalytic Activity ◽  
Sol Gel ◽  
Light Irradiation ◽  
Solar Light ◽  
Tio2 Photocatalyst ◽  
Photocatalytic Ability ◽  
Composite Photocatalyst ◽  
Gel Method ◽  
Simulated Solar Light ◽  
Solar Light Irradiation

P/Ag/Ag2O/Ag3PO4/TiO2 composite photocatalyst has been successfully prepared by a sol–gel method. It shows highly enhanced photocatalytic ability and stability under simulated solar light irradiation.

Elaboration and characterization of nano-crystalline layers of transparent titanium dioxide (Anatase-TiO2) deposited by a sol-gel (spin coating) process

2020 ◽  
Vol 19 ◽  
pp. 100482 ◽  
Author(s):  
Radhia Messemeche ◽  
Hanane Saidi ◽  
Abdallah Attaf ◽  
Youcef Benkhetta ◽  
Saadia Chala ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Spin Coating ◽  
Sol Gel ◽  
Anatase Tio2 ◽  
Coating Process ◽  
Spin Coating Process ◽  
Nano Crystalline

Structural and morphological characterization of anatase TiO2 coating on χ-Alumina scale fiber fabricated by sol–gel dip-coating method

2004 ◽  
Vol 271 (1-2) ◽  
pp. 245-251 ◽  
Author(s):  
Hue Thi Nguyen ◽  
Lei Miao ◽  
Sakae Tanemura ◽  
Masaki Tanemura ◽  
Shoichi Toh ◽  
...  
Keyword(s):  
Sol Gel ◽  
Alumina Scale ◽  
Dip Coating ◽  
Morphological Characterization ◽  
Anatase Tio2 ◽  
Tio2 Coating ◽  
Coating Method ◽  
Dip Coating Method

Low-temperature synthesis and characterization of anatase TiO2 nanoparticles by an acid assisted sol–gel method

2015 ◽  
Vol 647 ◽  
pp. 627-636 ◽  
Author(s):  
C. Leyva-Porras ◽  
A. Toxqui-Teran ◽  
O. Vega-Becerra ◽  
M. Miki-Yoshida ◽  
M. Rojas-Villalobos ◽  
...  
Keyword(s):  
Low Temperature ◽  
Tio2 Nanoparticles ◽  
Sol Gel ◽  
Anatase Tio2 ◽  
Synthesis And Characterization ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Gel Method ◽  
Sol Gel Method

Triethanolamine (TEA) Aqueous Solution as an Electrolyte Promoter in CO2 Photoelectro-Conversion under Simulated Solar Irradiation Assisted by Cu-Doped Graphene-Titania Catalyst

2015 ◽  
Vol 1109 ◽  
pp. 448-450 ◽  
Author(s):  
Md. Rakibul Hasan ◽  
Sharifah Bee binti O. A. Abdul Hamid ◽  
Wan Jeffrey Basirun
Keyword(s):  
Aqueous Solution ◽  
Sol Gel ◽  
Reduction Process ◽  
Charge Transfer Resistance ◽  
Vital Role ◽  
Solar Irradiation ◽  
Secondary Amines ◽  
Transfer Resistance ◽  
Doped Graphene ◽  
Simulated Solar Irradiation

Copper doped graphene-TiO2 nanocomposite were prepared via sol-gel process and embedded onto ITO coated glass films using electrophoretic deposition technique. The catalyst films were used for photoelectrocatalysis (PEC) of CO2 induced under simulated solar irradiation. Triethanolamine (TEA) aqueous solution was used as an electrolyte in this experiment. CO2 capture in the electrolyte solution plays vital role in the PEC process and in this case, the effect of TEA was investigated. Although the absorption rate of CO2 is lower in TEA solution than primary or secondary amines, CO2 loading was found higher in the solution. Less reactivity of TEA towards CO2 was also observed. The impedance results showed that, increased concentration of TEA in aqueous solution helps to reduce charge transfer resistance and thus facilitates CO2 reduction process.

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