A ternary CdS/AgBr/Ag3PO4 nanocomposite: characterization and the kinetics of its photocatalytic activity

In order to study the ion effect on titania phase structure, crystallite size, and photocatalytic activity, Rb+-doped TiO2 nanoparticles were prepared via a modiﬁed sol-gel method and characterized by means of X-ray diffraction, Energy Dispersive X-rays spectroscopy and transmission electron microscopy. The photocatalytic activity of the elaborated powders was studied following the degradation of methyl orange. The results indicate that doping Rb+ increases the BET surface area of TiO2 crystals, decreases the crystal size, reduces the diminishing rates of surface area with increasing calcinations temperature, raises the temperature at which anatase changes into rutile phase, and so significantly increases the photocatalytic activity of TiO2. The kinetics of the methyl orange degradation fits Langmuir-Hinshelwood kinetics model well.

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A research on the visible light photocatalytic activity and kinetics of CdS/CdSe co-modified TiO 2 nanotube arrays

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2014.10.066 ◽

2015 ◽

Vol 261 ◽

pp. 356-363 ◽

Cited By ~ 16

Author(s):

Jun Lv ◽

Honge Wang ◽

Huazhen Gao ◽

Guangqing Xu ◽

Dongmei Wang ◽

...

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Nanotube Arrays ◽

Visible Light Photocatalytic Activity ◽

Kinetics Of ◽

Visible Light Photocatalytic

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Investigation of Photocatalytic Activity and Kinetics of TiO2 Sensitized by Benzidine Yellow G

Asian Journal of Chemistry ◽

10.14233/ajchem.2014.17484 ◽

2014 ◽

Vol 26 (22) ◽

pp. 7657-7661 ◽

Cited By ~ 1

Author(s):

P. Du ◽

X.L. Shang ◽

C.H. Li

Keyword(s):

Photocatalytic Activity ◽

Kinetics Of

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Photocatalytic BiFeO3Nanofibrous Mats for Effective Water Treatment

Journal of Nanotechnology ◽

10.1155/2013/939531 ◽

2013 ◽

Vol 2013 ◽

pp. 1-6 ◽

Cited By ~ 7

Author(s):

Parmiss Mojir Shaibani ◽

K. Prashanthi ◽

Amirreza Sohrabi ◽

Thomas Thundat

Keyword(s):

Photocatalytic Activity ◽

Xrd Analysis ◽

X Ray Diffraction ◽

Sem Images ◽

One Dimensional ◽

First Order Kinetics ◽

Vis Spectroscopy ◽

Kinetics Of ◽

Effective Water ◽

Successful Production

One-dimensional BiFeO3(BFO) nanofibers fabricated by electrospinning of a solution of Nylon6/BFO followed by calcination were used for photocatalytic degradation of contaminants in water. The BFO fibers were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and UV-Vis spectroscopy. The SEM images of the as-spun samples demonstrated the successful production of nanofibers and the SEM images of the samples after calcination confirmed the integrity of the continuous BFO nanofibers. XRD analysis indicated the dominant presence of BFO phase throughout the calcinated nanofibers. Photocatalytic activity of the nanofibers and their application in water purification were investigated against 4-chlorophenol (4CP) as a model water contaminant. The results of the UV-Vis spectroscopy show the degradation of the 4CP by means of the photocatalytic activity of the BFO nanofibers. The kinetics of the photodegradation of 4CP is believed to be governed by a pseudo-first-order kinetics model.

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Kinetics of reduction of a resazurin-based photocatalytic activity ink

Catalysis Today ◽

10.1016/j.cattod.2016.05.045 ◽

2017 ◽

Vol 281 ◽

pp. 14-20 ◽

Cited By ~ 8

Author(s):

Andrew Mills ◽

Nathan Wells ◽

John MacKenzie ◽

Grant MacDonald

Keyword(s):

Photocatalytic Activity ◽

Kinetics Of ◽

Kinetics Of Reduction

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Structure and catalytic performance of Zn-doped TiO2 film

Pigment & Resin Technology ◽

10.1108/prt-06-2018-0054 ◽

2019 ◽

Vol 48 (6) ◽

pp. 508-514 ◽

Cited By ~ 2

Author(s):

Mei Yang ◽

Tingyu Huang ◽

Ning Tang ◽

Ben Ou ◽

Wenhao Zhang

Keyword(s):

Photocatalytic Activity ◽

Total Pore Volume ◽

Methyl Orange Solution ◽

Catalytic Performance ◽

Bet Surface Area ◽

Reaction Conditions ◽

Content Type ◽

Degradation Ratio ◽

Micro Arc Oxidation ◽

Kinetics Of

Purpose This paper aims to investigate the photocatalytic activity of zinc doped MAO-TiO2 films under the optimum MAO treatment condition. Design/methodology/approach The coating was prepared by micro arc oxidation, and the influence of doping on the properties of the coating was also investigated. Findings The results show that the BET surface area is 78.25±0.03m2/g, total pore area is 76.32 ± 0.04m2/g, and the total pore volume is 0.2135 ± 0.0004cm3/g. The degradation ratio of the film electrode with Zn-doped in methyl orange solution is up to 94%. When the react circles is 10 times, the degradation ratio is up to more than 85% and remains steady. With the different reaction conditions, these kinetics of the reactions show some different formulas. Originality/value A kinetic equation for photocatalytic activity is established.

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Carrier Transfer and Capture Kinetics of the TiO2/Ag2V4O11 Photocatalyst

Nanomaterials ◽

10.3390/nano10050828 ◽

2020 ◽

Vol 10 (5) ◽

pp. 828 ◽

Cited By ~ 1

Author(s):

Yun Zhou ◽

Qiujie Ding ◽

Yuan Wang ◽

Xiaoping OuYang ◽

Lixin Liu ◽

...

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Free Exciton ◽

Molar Ratio ◽

Absorption Region ◽

Time Resolved ◽

Photogenerated Electrons ◽

Carrier Separation ◽

Time Resolved Photoluminescence ◽

Kinetics Of

In this paper, TiO2/Ag2V4O11 nanoheterojunctions have been synthesized by hydrothermal methods, which show enhanced photocatalytic activity compared to TiO2 under visible light. Moreover, the TiO2/Ag2V4O11 nanoheterojunction with set molar ratio of 2:1, referred to as TA2, show the highest visible light photocatalytic activity, which could decompose about 100% RhB molecules within 80 min of irradiation with visible light. Specially, the time-resolved photoluminescence spectrum of TA2 demonstrates that the free exciton recombination occurs in approximately 1.7 ns, and the time scale for Shockley–Read–Hall recombination of photogenerated electrons and holes is prolonged to 6.84 ns. The prolonged timescale of TA2 compared to TiO2 and Ag2V4O11 can be attributed to the carrier separation between nanojunctions and the carrier capture by interfacial defects. Furthermore, the enhanced photocatalytic activity of TiO2/Ag2V4O11 nanoheterojunctions also benefits from the synergistic effect of the broadened absorption region, higher photocarrier generation, longer carrier lifetime, and quicker collection dynamics.

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Photocatalytic Activity of W Doped Ta2O5 Particles for Methylene Blue Degradation under UV-Light

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.197-198.281 ◽

2011 ◽

Vol 197-198 ◽

pp. 281-284 ◽

Cited By ~ 1

Author(s):

Yan Hong Zhao ◽

Li Chun Hou ◽

Xiang Li ◽

Xiaodong Yang ◽

Xiao Jing Wang

Keyword(s):

Methylene Blue ◽

Photocatalytic Activity ◽

Uv Light ◽

Tantalum Oxide ◽

X Ray Diffraction ◽

Orthorhombic Crystal ◽

Methylene Blue Degradation ◽

X Ray ◽

First Order ◽

Kinetics Of

Tungsten doped tantalum oxide (W-Ta2O5) particles were synthesized by a low temperature hydrothermal method. The phase structure of W-Ta2O5particles was characterized by X-ray diffraction (XRD). The XRD results indicated that the samples belonged to orthorhombic crystal. The photocatalytic activity of samples was investigated with degradation methylene blue (MB) under ultraviolet light. The degradation efficiency of MB under the catalysis of W-Ta2O5particles attained 91% when the reaction time was 7 h. The kinetics of MB degradation was respect to the first-order in the presence of the photocatalysts.

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Kinetics and Mechanism of Aniline and Chloroanilines Degradation Photocatalyzed by Halloysite-TiO2 and Halloysite-Fe2O3 Nanocomposites

Catalysts ◽

10.3390/catal11121548 ◽

2021 ◽

Vol 11 (12) ◽

pp. 1548

Author(s):

Beata Szczepanik ◽

Piotr Słomkiewicz ◽

Dariusz Wideł ◽

Marianna Czaplicka ◽

Laura Frydel

Keyword(s):

Mass Spectrometry ◽

Photocatalytic Activity ◽

Photocatalytic Degradation ◽

Adsorption Equilibrium ◽

Equilibrium Constants ◽

First Order ◽

Photodegradation Rate ◽

Photodegradation Mechanism ◽

Kinetics Of ◽

Commercial Tio2

The kinetics of photocatalytic degradation of aniline, 2-chloroaniline, and 2,6-dichloroaniline in the presence of halloysite-TiO2 and halloysite-Fe2O3 nanocomposites, halloysite containing naturally dispersed TiO2, Fe2O3, commercial TiO2, P25, and α-Fe2O3 photocatalysts, were investigated with two approaches: the Langmuir–Hinshelwood and first-order equations. Adsorption equilibrium constants and adsorption enthalpies, photodegradation rate constants, and activation energies for photocatalytic degradation were calculated for all studied amines photodegradation. The photodegradation mechanism was proposed according to organic intermediates identified by mass spectrometry and electrophoresis methods. Based on experimental results, it can be concluded that after 300 min of irradiation, aniline, 2-chloro-, and 2,6-dichloroaniline were completely degraded in the presence of used photocatalysts. Research results allowed us to conclude that higher adsorption capacity and immobilization of TiO2 and Fe2O3 on the halloysite surface in the case of halloysite-TiO2 and halloysite-Fe2O3 nanocomposites significantly increases photocatalytic activity of these materials in comparison to the commercial photocatalyst: TiO2, Fe2O3, and P25.

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