scholarly journals Photocatalytic Degradation of Humic Acid by Fe-TiO2Supported on Spherical Activated Carbon with Enhanced Activity

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Mi-Hwa Baek ◽  
Ji-Sook Hong ◽  
Ji-Won Yoon ◽  
Jeong-Kwon Suh
Keyword(s):  
Photocatalytic Activity ◽  
Activated Carbon ◽  
Humic Acid ◽  
Photocatalytic Degradation ◽  
Wavelength Range ◽  
High Photocatalytic Activity ◽  
Exchange Method ◽  
Process Step ◽  
Fe Content ◽  
Spherical Activated Carbon

Fe-TiO2supported on spherical activated carbon (Fe-TiO2/SAC) with different Fe contents was prepared by heat treatment process after ion exchange method. The prepared Fe-TiO2/SAC was characterized by SEM, EDS, and BET. Batch experiments for photocatalytic degradation of humic acid by Fe-TiO2/SAC were carried out in the fluidized bed photoreactor. It was found that 0 wt% Fe-TiO2/SAC had high photocatalytic activity in the wavelength range of 100~280 nm. However, Fe-TiO2/SAC with Fe contents of 0.4, 0.6, and 0.8 wt% exhibited higher photocatalytic activity than 0 wt% Fe-TiO2/SAC in the wavelength range of 315~400 nm compared to that of 100~280 nm. The optimum Fe content was 0.6 wt% for maximum photocatalytic degradation of humic acid. Moreover, Fe-TiO2/SAC does not require an additional process step for separation of photocatalyst from treated water after photocatalysis.

Preparation of novel AgBr/Bi 3 O 4 Br hybrid with high photocatalytic activity via in situ ion exchange method

2017 ◽  
Vol 193 ◽  
pp. 73-76 ◽  
Author(s):  
Jingxiong Yu ◽  
Min Cui ◽  
Xingzheng Liu ◽  
Qianqian Chen ◽  
Ying Wu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Ion Exchange ◽  
High Photocatalytic Activity ◽  
Exchange Method ◽  
Ion Exchange Method

Photocatalytic Degradation of Humic Acid Using Fe3+ and N-Doped 3SnO2/TiO2 Thin Films Coated on Glass Fibers

2014 ◽  
Vol 608 ◽  
pp. 164-169
Author(s):  
Peerawas Kongsong ◽  
Lek Sikong ◽  
Sutham Niyomwas ◽  
Vishnu Rachpech
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Humic Acid ◽  
Glass Fibers ◽  
Sol Gel ◽  
Composite Films ◽  
Dip Coating ◽  
High Photocatalytic Activity ◽  
Coating Methods ◽  
Uv Lamp

The Fe3+ and N–doped 3SnO2/TiO2 composite thin films and undoped films coated on glass fibers were prepared by sol–gel and dip–coating methods. The films were calcined at 600°C for 2 hour and characterized by XRD, SEM, EDS and XPS. The photocatalytic activity of the coated glass fibers was determined by means of degradation of a methylene blue (MB) solution and humic acid (HA). It was found that the optimized 20N/3SnO2/TiO2composite films exhibit a high photocatalytic activity and HA could be rapidly removed from water. The main factor affecting the HA degradation of 20N/3SnO2/TiO2 films is quantity of glass fibers loading, irradiation power of UV lamp and flow rate of water.

Preparation of Bi/Bi2MoO6 Plasmonic Photocatalyst with High Photocatalytic Activity Under Visible Light Irradiation

NANO ◽  
2018 ◽  
Vol 13 (11) ◽  
pp. 1850127 ◽  
Author(s):  
Chentao Zou ◽  
Zhiyuan Yang ◽  
Mengjun Liang ◽  
Yunpeng He ◽  
Yun Yang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Rate Constant ◽  
Active Species ◽  
High Photocatalytic Activity ◽  
Composite Photocatalysts ◽  
Degradation Rate Constant ◽  
Degradation Activity ◽  
Spr Effect

Bi metal deposited on Bi2MoO6 composite photocatalysts have been successfully synthesized via a simple reduction method at room temperature with using NaBH4 as the reducing agent. The photocatalytic activity of the composite was evaluated by degradation of rhodamine B (RhB) and bisphenol A (BPA) solution under visible light. The rate constant of Bi/Bi2MoO6 composite to RhB is 10.8 times that of Bi2MoO6, and the degradation rate constant of BPA is 6.9 times of that of Bi2MoO6. Nitrogen absorption–desorption isotherm proved that the increase of specific surface area is one of the reasons for the improvement of photocatalytic degradation activity of Bi/Bi2MoO6 composites. The higher charge transfer efficiency of Bi/Bi2MoO6 is found through the characterization of the photocurrent and impedance, which are attributed to the surface plasmon resonance (SPR) effect produced by the introduction of the metal Bi monomer in the composite. Free radical capture experiments proved that cavitation is the main active species. Based on the above conclusions, a possible mechanism of photocatalytic degradation is proposed.

Photocatalytic degradation of azo dye using TiO2 supported on spherical activated carbon

2012 ◽  
Vol 29 (12) ◽  
pp. 1722-1729 ◽  
Author(s):  
Ji-Won Yoon ◽  
Mi-Hwa Baek ◽  
Ji-Sook Hong ◽  
Chang-Yong Lee ◽  
Jeong-Kwon Suh
Keyword(s):  
Activated Carbon ◽  
Photocatalytic Degradation ◽  
Azo Dye ◽  
Spherical Activated Carbon ◽  
Degradation Of Azo Dye

scholarly journals Rapid Photocatalytic Degradation of Pollutant from Water under UV and Sunlight via Cellulose Nanofiber Aerogel Wrapped by TiO2

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Song Li ◽  
Xiaofeng Hao ◽  
Xiangdong Dai ◽  
Tao Tao
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Ultraviolet Light ◽  
Cellulose Nanofibers ◽  
High Photocatalytic Activity ◽  
Cellulose Nanofiber ◽  
Distribution Data ◽  
Composite Aerogel ◽  
Sunlight Irradiation ◽  
Portable Photocatalyst

Semiconductor photocatalysis can be used to decompose various organic compounds in open air under aqueous conditions with solar energy. A cellulose nanofiber/TiO2 aerogel (CNFT) for rapid photocatalytic degradation of methylene blue (MB) solution was successfully fabricated through a facile hydrothermal method. TiO2 nanoparticles adhered to the surface of cellulose nanofibers as scaffold through a hydrogen bond and were well-distributed. The particle size distribution data showed that the mean diameter of TiO2 nanoparticles was around 6.8 nm. In the system of the as-prepared CNFT, CNF played important roles in adsorption of pollutant and in stopping the electron hole derived from TiO2 from recombining. The composite aerogel exhibited efficient photocatalytic activity in the degradation of pollutant (MB) under ultraviolet light (UV) and sunlight irradiation. The composite aerogel could be regarded as a green and portable photocatalyst, because it was promising for wastewater treatment application as a result of its good high photocatalytic activity and stability under ultraviolet light and sunlight irradiation.

Synthesis, characterization, and photocatalytic degradation properties of ZnO/ZnFe2O4 magnetic heterostructures

2017 ◽  
Vol 41 (24) ◽  
pp. 15433-15438 ◽  
Author(s):  
Yan Xu ◽  
Shumin Wu ◽  
Xianliang Li ◽  
Yehang Huang ◽  
Zhuopeng Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Metal Organic Framework ◽  
High Photocatalytic Activity ◽  
Mixed Metal ◽  
Magnetic Heterostructures ◽  
Metal Organic ◽  
One Step ◽  
The One ◽  
Degradation Properties

A nanosheet-constructed ZnO/ZnFe2O4 composite with high photocatalytic activity is obtained via the one-step pyrolysis of a Zn–Fe mixed-metal–organic framework precursor.

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