Co-molten solvothermal method for synthesizing chalcopyrite CuFe1−xCrxS2 (x ≤ 0.4): high photocatalytic activity for the reduction of nitrate ions

2014 ◽  
Vol 43 (41) ◽  
pp. 15385-15390 ◽  
Author(s):  
Jia Yang ◽  
Mufei Yue ◽  
Jing Ju ◽  
Rihong Cong ◽  
Wenliang Gao ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Oxalic Acid ◽  
Solvothermal Method ◽  
Uv Light ◽  
High Photocatalytic Activity ◽  
Nitrate Ions ◽  
Photocatalytic Activities ◽  
Method Show

CuFe1−xCrxS2 prepared by a thiourea–oxalic acid co-molten solvothermal method show superior UV-light photocatalytic activities toward nitrate ions reduction.

Facile Preparation of Nanoporous SnO2 for Application in Photodegradation of Methylene Blue

2011 ◽  
Vol 194-196 ◽  
pp. 385-388
Author(s):  
Hong Juan Wang ◽  
Feng Qiang Sun ◽  
Ming Zhong Ren ◽  
Qing Wei Guo
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Photocatalytic Performance ◽  
Uv Light ◽  
High Photocatalytic Activity ◽  
N2 Adsorption ◽  
Photochemical Method ◽  
Degussa P25 ◽  
Adsorption Desorption

Nanoporous SnO2with high photocatalytic activity has been successfully prepared by a photochemical method, using SnCl2aqueous solution as a precursor. The as-synthesized sample was characterized by XRD, N2 adsorption-desorption and UV-vis. The photocatalytic activity of the sample was evaluated by degrading methylene blue (MB) aqueous solution under the UV light source and was compared with that of the commercial titania (Degussa P25). The results showed that the produced SnO2can degrade MB solution quickly and has comparative photocatalytic performance with P25 for degrading MB. This facile method supplies an effective way to prepare SnO2photocatalyst.

scholarly journals SOLVOTHERMAL SYNTHESIS OF BI2WO6 AND ITS PHOTOCATALYTIC ACTIVITY UNDER VISIBLE LIGHT IRRADIATION

2018 ◽  
Vol 54 (4B) ◽  
pp. 42
Author(s):  
Trinh Duy Nguyen
Keyword(s):  
Absorption Spectrum ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Solvothermal Synthesis ◽  
Solvothermal Method ◽  
Visible Region ◽  
High Photocatalytic Activity ◽  
Light Irradiation ◽  
Different Temperatures

Flower-like Bi2WO6 were successfully synthesized using the solvothermal method at different temperatures and characterized by XRD, FE-SEM, and DRS. We also investigated the photocatalytic activity of Bi2WO6 for the decomposition of rhodamine B under visible light irradiation. From XRD and SEM results, the reaction temperature has significant effects on the morphologies of the samples. From DRS results, Bi2WO6 samples displayed the absorption spectrum up to the visible region and then they showed the high photocatalytic activity under visible light irradiation, as a comparison with TiO2-P25.

scholarly journals Oxide-Clay Mineral as Photoactive Material for Dye Discoloration

Minerals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 132
Author(s):  
Maicon O. Miranda ◽  
Bartolomeu Cruz Viana ◽  
Luzia Maria Honório ◽  
Pollyana Trigueiro ◽  
Maria Gardênnia Fonseca ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Clay Mineral ◽  
Uv Light ◽  
High Photocatalytic Activity ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Zirconium Oxides ◽  
Transmission Electron ◽  
Palygorskite Clay

Titanium and zirconium oxides (TiO2 and ZrO2, respectively) were obtained from alkoxides hydrolyses, and then deposited into palygorskite clay mineral (Pal) to obtain new materials for photocatalytic applications. The obtained materials were characterized by structural, morphological, and textural techniques. X-ray diffraction (XRD) results confirmed the characteristic peaks of oxides and clay transmission electron microscopy (TEM) and scanning electron microscopy (SEM) images of the modified palygorskite with both oxides showed that the clay was successfully modified by the proposed method. The increase in the specific surface area of the clay occurred when TiO2 and ZrO2 were deposited on the surface. The photocatalytic activity of these materials was investigated using the Remazol Blue anion dye under UV light. The evaluated systems presented high photocatalytic activity, reaching approximately 98% of dye discoloration under light. Thus, TiO2–Pal and ZrO2–TiO2–Pal are promising clay mineral-based photocatalysts.

Preparation and Characterization of Nanocrystalline La2Ti2O7 by Microwave Assisted Process

2016 ◽  
Vol 852 ◽  
pp. 525-529 ◽  
Author(s):  
Ying Zhou ◽  
Zhi Yong Mei ◽  
Hai Shao Ye ◽  
Wen Wen Su ◽  
Xi Zhao ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Uv Light ◽  
Raw Materials ◽  
Spherical Shape ◽  
High Photocatalytic Activity ◽  
X Ray Diffraction ◽  
Microwave Assisted ◽  
Average Grain Size ◽  
Ft Ir

Using La (NO3)3·6H2O, TiCl4 , and citric acid as the main raw materials, nanocrystalline La2Ti2O7 samples were prepared by microwave assisted method. The structure and morphology of samples were characterized by thermogravimetric and differential thermal analysis (TG-DTA), powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier Transform Infrared (FT-IR) spectroscopy. The photocatalytic activity of La2Ti2O7 was studied for methyl orange (MO) used as simulated sewage. It was found that the single phase La2Ti2O7 could be obtained through the calcination of microwave processed La2Ti2O7 precursors at 600 °C. The resulted product had an approximate spherical shape and average grain size of 50 nm in diameter. Under UV light, the photocatalytic experiment indicated that the prepared La2Ti2O7 nanocrystalline had high photocatalytic activity for degradation of methyl orange.

Photocatalytic Activity of Bismuth Layered Perovskite Treated with Acid

2009 ◽  
Vol 421-422 ◽  
pp. 554-557
Author(s):  
Soihiro Watanabe ◽  
Yousuke Narumi ◽  
Kenji Toda ◽  
Tadashi Ishigaki ◽  
Kazuyoshi Uematsu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Acid Treatment ◽  
Uv Light ◽  
High Photocatalytic Activity ◽  
Light Irradiation ◽  
Layered Perovskite ◽  
O2 Evolution ◽  
Water Decomposition ◽  
H2 Evolution ◽  
Uv Light Irradiation

We synthesized Sr0.7La0.2[ ]0.1Bi2Ta2O9 (SBTL , [ ] vacancy), and measured their photocatalytic activity for water decomposition under UV light irradiation after acid treatment. They showed the high photocatalytic activity under UV light irradiation (H2 evolution (213μmol / h) , O2 evolution (82μmol / h)).

Solvothermal Synthesis of TiO2 Hollow Microsphere and Its Photocatalytic Properties

2011 ◽  
Vol 356-360 ◽  
pp. 345-348
Author(s):  
Jin Guo Wang ◽  
Jian Zhu ◽  
Xi Li ◽  
He Xing Li
Keyword(s):  
Photocatalytic Activity ◽  
Solvothermal Synthesis ◽  
Solvothermal Method ◽  
Uv Light ◽  
Hollow Structure ◽  
Hollow Microsphere ◽  
Hollow Microspheres ◽  
Photocatalytic Properties ◽  
Multiple Reflections ◽  
Facile Solvothermal Method

TiO2hollow microspheres were synthesized by a facile solvothermal method. The prepared samples were characterized by the XRD, SEM, TEM, BET and UV-vis. The results showed that the TiO2hollow microspheres offered an enhanced photocatalytic activity due to the multiple reflections of the UV light within the inner hollow structure.

scholarly journals Highly Active Rare-Earth-Metal La-Doped Photocatalysts: Fabrication, Characterization, and Their Photocatalytic Activity

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
S. Anandan ◽  
Y. Ikuma ◽  
V. Murugesan
Keyword(s):  
Photocatalytic Activity ◽  
High Surface ◽  
Sol Gel ◽  
Earth Metal ◽  
High Photocatalytic Activity ◽  
Highly Active ◽  
Photocatalytic Activities ◽  
Doped Zno ◽  
Photonic Efficiency ◽  
La Doped

Efficient La-doped TiO2photocatalysts were prepared by sol-gel method and extensively characterized by various sophisticated techniques. The photocatalytic activity of La-doped TiO2was evaluated for the degradation of monocrotophos (MCPs) in aqueous solution. It showed higher rate of degradation than pure TiO2for the light of wavelength of 254 nm and 365 nm. The rate constant of TiO2increases with increasing La loading and exhibits maximum rate for 1% La loading. The photocatalytic activities of La-doped TiO2are compared with La-doped ZnO; the reaction rate of the former is ~1.8 and 1.1 orders higher than the latter for the lights of wavelength 254 nm and 365 nm, respectively. The relative photonic efficiency of La-doped TiO2is relatively higher than La-doped ZnO and commercial photocatalysts. Overall, La-doped TiO2is the most active photocatalyst and shows high relative photonic efficiencies and high photocatalytic activity for the degradation of MCP. The enhanced photocatalytic activity of La-doped TiO2is mainly due to the electron trapping by lanthanum metal ions, small particle size, large surface area, and high surface roughness of the photocatalysts.

Self-Generated Macrochannel-Structure TiO2/g-C3N4 with High Photocatalytic Activity

2016 ◽  
Vol 69 (4) ◽  
pp. 478 ◽  
Author(s):  
Gaopeng Dai ◽  
Tao Wang ◽  
Suqin Liu ◽  
Ying Liang ◽  
Wen Xu
Keyword(s):  
Photocatalytic Activity ◽  
High Photocatalytic Activity ◽  
Tetrabutyl Titanate ◽  
Mixed Solution ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
Sunlight Irradiation ◽  
Photocatalytic Activities ◽  
Uv Visible ◽  
Oxidative Species

TiO2/g-C3N4 composites with macrochannel structure were successfully synthesised without using templates by the simple dropwise addition of tetrabutyl titanate containing graphitic carbon nitride (g-C3N4) to a water-ethanol mixed solution, which was then calcined at 400°C. The as-prepared samples were characterised by X-ray diffraction, scanning electron microscopy, and UV-visible absorption spectroscopy. The photocatalytic activities of the samples were evaluated by the photocatalytic degradation of methyl orange in an aqueous medium under visible-light and simulated sunlight irradiation. The results show that the g-C3N4 content in TiO2/g-C3N4 composites plays an important role in the formation of macrochannels. Only samples containing less than 10 wt-% of g-C3N4 exhibit macrochannel structure. TiO2/g-C3N4 composites with macrochannel structure displayed enhanced photocatalytic activity. G-C3N4 content exhibited an obvious influence on photocatalytic performance, and the optimal loading of g-C3N4 was 10 wt-%. The enhanced photocatalytic activity could be attributed to the synergetic effects of the macrochannel structure, the large specific surface area, and the heterojunction between TiO2 and g-C3N4. The main oxidative species responsible for the photodegradation of pollutants were further confirmed by the trapping experiments.

Synthesis of Composite TiO2/Natural Cotton Cellulose Nanofiber with Photocatalytic Property

2014 ◽  
Vol 665 ◽  
pp. 393-396
Author(s):  
Qiu Yan Liu ◽  
Jing Li ◽  
Jun Cao ◽  
Chao Rong Li
Keyword(s):  
Photocatalytic Activity ◽  
Uv Light ◽  
Organic Pollutant ◽  
Sol Gel ◽  
Photocatalytic Property ◽  
Important Application ◽  
Anatase Structure ◽  
Uv Light Irradiation ◽  
Photocatalytic Activities ◽  
Hydrothermal Methods

TiO2/NCCN nanocomposites have been prepared by sol-gel and hydrothermal methods. Firstly, the NCCN was prepared by electrospinning technology, then the amorphous TiO2films were coated on the surface of the NCCN by a sol-gel method, and TiO2(anatase structure) nanoparticles could be fixed on the surface of NCCN by a hydrothermal method to get higher photocatalysis efficiency. The photocatalytic activities indicate that the TiO2/NCCN nanocomposites exhibited a good photocatalytic activity for photodegradation of methylthionine chloride (MO) solution under UV light irradiation, leading to an important application in photodegradation of organic pollutant.

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