scholarly journals Facile fabrication of hybrid titanium(IV) isopropoxide/pozzolan nanosheets (TnS-Pz) of high photocatalytic activity: characterization and application for Cr(VI) reduction in an aqueous solution

2020 ◽  
Author(s):  
Aline M. Novack ◽  
Glaydson S. dos Reis ◽  
Fabíola V. Hackbarth ◽  
Belisa A. Marinho ◽  
Maja B. Ðolić ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
High Photocatalytic Activity ◽  
Facile Fabrication

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.

Synthesis and Recycle of ZnO Particles for Degradation of Methyl Orange Aqueous Solution

2011 ◽  
Vol 121-126 ◽  
pp. 587-591 ◽  
Author(s):  
Li Qin Wang ◽  
Xiang Ni Yang ◽  
Xiu Li Zhao ◽  
Yang Han ◽  
Rui Jun Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Lamellar Structure ◽  
Degradation Rate ◽  
Mesoporous Structure ◽  
High Photocatalytic Activity ◽  
Type Iv ◽  
Zno Particles ◽  
Adsorption Desorption

The ZnO particles with mesoporous and lamellar structure were synthesized in the method of precipitation, using zinc acetate as precursor. The ZnO particles were characterized by the means of scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and N2 adsorption–desorption measurements. The photoactivity of as-prepared ZnO particles was evaluated by degradation experiment of methyl orange aqueous solution. The results showed the obtained ZnO particles were irregular polygons with lamellar structure, and the particle size was in the range of 50 nm to 300 nm. According to XRD and N2 absorption results, ZnO particles were pure and integrated crystals with high crystallinity, and adsorption-desorption isotherms correspond to the typical type IV isotherm with a hysteresis loop of type H3, which showed ZnO particles had mesoporous structure with slit pore shape. The ZnO particles had high photocatalytic activity, the maximum degradation rate of methyl orange aqueous solution can reach 99%. When reused for the fifth time, the photocatalytic activity of ZnO particles was similar with the fresh ones, and recycled for the tenth time, the degradation rate of methyl orange aqueous solution still standed by 84.7%.

Remarkably high apparent quantum yield of the overall photocatalytic H2O splitting achieved by utilizing Zn ion added Ga2O3 prepared using dilute CaCl2 solution

2015 ◽  
Vol 51 (65) ◽  
pp. 12935-12938 ◽  
Author(s):  
Yoshihisa Sakata ◽  
Takuya Hayashi ◽  
Ryō Yasunaga ◽  
Nobuyuki Yanaga ◽  
Hayao Imamura
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Quantum Yield ◽  
High Photocatalytic Activity ◽  
Apparent Quantum Yield ◽  
Cacl2 Solution

Remarkably high photocatalytic activity for the overall H2O splitting was achieved by utilizing a Rh0.5Cr1.5O3(Rh; 0.5 wt%)/Zn(3 mol%)–Ga2O3 photocatalyst when Ga2O3 was prepared using dilute CaCl2 aqueous solution (0.001 mol l−1).

scholarly journals Tuning the Morphology of Ag3PO4 Photocatalysts with an Elevated Concentration of KH2PO4

2019 ◽  
Vol 14 (3) ◽  
pp. 625 ◽  
Author(s):  
Khusnul Afifah ◽  
Roy Andreas ◽  
Dadan Hermawan ◽  
Uyi Sulaeman
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
High Photocatalytic Activity ◽  
Elevated Concentration ◽  
X Ray Diffraction ◽  
X Ray ◽  
Defect Sites ◽  
Excellent Photocatalytic Activity

Tuning the morphology of Ag3PO4 photocatalysts with an elevated concentration of KH2PO4 have been successfully conducted. This photocatalyst was prepared by starting material of AgNO3 and KH2PO4.  The KH2PO4 aqueous solution with five concentrations of 0.10 M, 0.15 M, 0.30 M, 0.45 M, and 0.60 M was reacted with AgNO3 aqueous solution. The products were characterized using X-ray Diffraction (XRD), UV-Vis Diffuse Reflectance Spectroscopy (DRS), and Scanning Electron Microscopy (SEM). The concentration of KH2PO4 significantly affected the morphology, size, and crystallinity of catalyst. The morphology of Ag3PO4 may be tuned with the synthesis using an elevated concentration of KH2PO4. The sample with the synthesis using 0.15 M of KH2PO4 exhibited the excellent photocatalytic activity. The high photocatalytic activity was caused by the small size of mixed morphology of sphere and tetrahedron, high crystallinity and defect sites. Copyright © 2019 BCREC Group. All rights reserved 

A Novel TiO2 Film Catalyst — Preparation, Properties and Research on its Photocatalytic Oxidized Activity

1997 ◽  
Vol 497 ◽  
Author(s):  
Y. A. Cao ◽  
X. T. Zhang ◽  
L. Q. CHONG ◽  
D. Y. WANG ◽  
T. F. XIE ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Chemical Vapor Deposition ◽  
Tio2 Film ◽  
Vapor Deposition ◽  
Visible Region ◽  
Chemical Vapor ◽  
High Photocatalytic Activity ◽  
Catalyst Preparation

ABSTRACTA new kind of TiO2 film catalyst was prepared by the Plasma-enhanced chemical vapor deposition (PECVD) method. The surface photovoltaic spectroscopy (SPS) results showed that its photoresponse was extended into the visible region. Photooxidation experiments showed that this kind of TiO2 film had high photocatalytic activity on degradation of phenol in aqueous solution. The influence of the thickness of TiO2 film on its photocatalytic activity was also discussed.

scholarly journals Синтез легированного кислородом графитоподобного нитрида углерода из тиомочевины

2019 ◽  
Vol 45 (3) ◽  
pp. 49
Author(s):  
Н.М. Денисов ◽  
Е.Б. Чубенко ◽  
В.П. Бондаренко ◽  
В.Е. Борисенко
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Thermal Treatment ◽  
Visible Light ◽  
Band Gap ◽  
Rhodamine B ◽  
Carbon Nitride ◽  
Annealing Temperature ◽  
High Photocatalytic Activity ◽  
Semiconductor Properties

AbstractWe have synthesized oxygen-doped graphite-like carbon nitride (g-C_3N_4) by the thermal treatment of the thiourea at 450–550°C. With an increase in the annealing temperature, the oxygen concentration in g-C_3N_4 increases, and the band-gap of the material decreases from 2.64 to 2.47 eV. The semiconductor properties of g-C_3N_4 doped with oxygen are confirmed by its high photocatalytic activity, determined by decoloration of a Rhodamine B aqueous solution in the presence of g-C_3N_4 upon irradiation with visible light.

scholarly journals Facile Fabrication of Dumbbell-Like β-Bi2O3/Graphene Nanocomposites and Their Highly Efficient Photocatalytic Activity

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1359 ◽  
Author(s):  
Jun Yang ◽  
Taiping Xie ◽  
Chenglun Liu ◽  
Longjun Xu
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Nanosheets ◽  
High Photocatalytic Activity ◽  
Charge Carriers ◽  
Graphene Nanocomposites ◽  
Structure Surface ◽  
Facile Fabrication ◽  
Mixing Method ◽  
Graphene Content ◽  
High Degradation Rate

β-Bi2O3 decorated graphene nanosheets (β-Bi2O3/GN) were prepared by a facile solution mixing method. The crystal structure, surface morphology, and photo absorbance properties of the products were characterized by XRD, SEM, and UV-VIS diffuse reflection, respectively. Moreover, the effect of graphene content on photocatalytic activity was systematically investigated, and the results indicated that these composites possessed a high degradation rate of Rhodamine B (RhB), which was three times higher than that of bare β-Bi2O3 when graphene content was 1 wt %. This high photocatalytic activity was attributed predominantly to the presence of graphene, which served as an electron collector and transporter to efficiently lengthen the lifetime of the photogenerated charge carriers from β-Bi2O3.

Molten Salt Synthesis of SnS2 Nanoparticles with Visible-Light Driven Photocatalytic Activity for the Degradation of Rhodamine B

2015 ◽  
Vol 655 ◽  
pp. 203-207 ◽  
Author(s):  
Tie Kun Jia ◽  
Guang Sun ◽  
Jian Liang Cao ◽  
Zhan Ying Zhang
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Molten Salt ◽  
Diffuse Reflectance ◽  
High Photocatalytic Activity ◽  
Molten Salt Synthesis ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Visible Light Driven

SnS2 nanoparticles with perfectly crystalline morphology were synthesized via a molten salt synthesis route at a relatively low temperature. The resulting SnS2 nanoparcticles were characterized by X-ray diffraction (XRD), field scanning electron microscopy (FESEM), and UV-vis diffuse reflectance spectra (UV-vis). The observations of FESEM images showed that the sample consists of a large number of aggregates assembled with numerous nanoparticles packed into compact texture. The photocatalytic activity of the as-prepared SnS2 samples was evaluated by the degradation of RhB aqueous solution. The effect of the molar ratio of thiourea to SnCl2 on the photocatalytic activity was also investigated, and the result showed that the as-prepared SnS2 sample has high photocatalytic activity efficiency in the degradation of RhB aqueous solution when the molar ratio of thiouea to SnCl2 was 3.

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