Work function: a determining factor of the photodegradation rate of methyl orange via hollow octadecahedron Cu2O crystals

2018 ◽  
Vol 20 (30) ◽  
pp. 20117-20123 ◽  
Author(s):  
Bo Zhang ◽  
Shaowei Liao ◽  
Wenjun Wu ◽  
Hui Li ◽  
Tianrui Ren
Keyword(s):  
Methyl Orange ◽  
Work Function ◽  
Photodegradation Efficiency ◽  
Photodegradation Rate ◽  
Determining Factor

Herein, the work function serves as a crucial factor for controlling the photodegradation efficiency of methyl orange via hollow octadecahedron Cu2O crystals.

Research on Visible Light Photocatalytic Performance of Tungsten Doped TiO2

2011 ◽  
Vol 236-238 ◽  
pp. 399-402
Author(s):  
Dao Xin Wu ◽  
Zhou Lan Yin ◽  
Qi Yuan Chen ◽  
Jie Li ◽  
Ke Long Huang
Keyword(s):  
Methyl Orange ◽  
Low Temperature ◽  
Visible Light ◽  
Crystalline State ◽  
Photocatalytic Performance ◽  
Catalyst Concentration ◽  
Tetrabutyl Titanate ◽  
Photodegradation Efficiency ◽  
Rutile Titania ◽  
Visible Light Photocatalytic

In this paper, W-doped rutile titania was prepared by low temperature hydrolysis using Tetrabutyl titanate. Powers were characterized by XRD、DRS、PL. At 1073K, Doped concentration have been in a certain range, Tungsten could be doped into the lattice of rutile TiO2in the way of replacement, which would cause no change in rutile TiO2crystalline state with sunlight as the light source, pH=2.0, catalyst concentration was 1.0g.L-1, concentration of methyl orange was 5.0mg.L-1. It has been shown that Tungsten doped TiO2powders(1.0%,1073K) has been the most photodegradation efficiency, and the degradation efficiency was 96.8% after 12h.

Study on the Preparation and Photocatalytic Property of N, Fe, Zn Nano-TiO2 Loaded on Active Carbon

2011 ◽  
Vol 356-360 ◽  
pp. 331-334
Author(s):  
Chen Tao Hou ◽  
Xia He ◽  
Ying Wang ◽  
Wen Jie Nie
Keyword(s):  
Active Carbon ◽  
Sol Gel ◽  
Photocatalytic Property ◽  
Light Response ◽  
Average Diameter ◽  
Dip Coating ◽  
X Ray Diffraction ◽  
Photodegradation Efficiency ◽  
Photodegradation Rate ◽  
Dip Coating Technique

In the paper, tetranbutyl titanate was loaded on granular active carbon using sol-gel dip-coating technique to form anatase nano-TiO2 photocatalyst with an average diameter of 16nm doped with N, Fe, Zn ions. The morphology and crystal structure were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and UV–Vis spectrophotometer, respectively. The results show that the prepared photocatalyst demonstrates outstanding photodegradation efficiency and light response zone has transferred from ultraviolet light zone to UV-visible zone. Moreover, considering methylene blue (MB) as target degradation pollutant, under visible light irradiation, the photodegradation rate reached beyond 100% after 1h.

scholarly journals Nanostructured TiO2 Sensitized with MoS2 Nanoflowers for Enhanced Photodegradation Efficiency toward Methyl Orange

ACS Omega ◽  
2021 ◽  
Author(s):  
Sagar V. Kite ◽  
Abhijit Nanaso Kadam ◽  
Dattatraya J. Sathe ◽  
Satish Patil ◽  
Sawanta S. Mali ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Nanostructured Tio2 ◽  
Photodegradation Efficiency

scholarly journals Magnetic field effect on the photocatalytic degradation of methyl orange by commercial TiO2 powder

RSC Advances ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 6284-6291
Author(s):  
Yuecheng Bian ◽  
Ganhong Zheng ◽  
Wei Ding ◽  
Lin Hu ◽  
Zhigao Sheng
Keyword(s):  
Magnetic Field ◽  
Titanium Dioxide ◽  
Methyl Orange ◽  
Field Effect ◽  
Magnetic Field Effect ◽  
Tio2 Powder ◽  
Photodegradation Rate ◽  
The Magnetic Field ◽  
Degradation Of Methyl Orange ◽  
Commercial Tio2

In this work, by taking commercial P25 hydrophilic titanium dioxide (TiO2) as a photocatalyst, the magnetic field effect (MFE) on the photodegradation rate of methyl orange is studied.

Fabrication and characterization of CdS doped TiO2 nanotube composite and its photocatalytic activity for the degradation of methyl orange

2015 ◽  
Vol 72 (8) ◽  
pp. 1341-1347
Author(s):  
Jinwook Chung ◽  
Seu-Run Kim ◽  
Jong-Oh Kim
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Uv Light ◽  
Pure Tio2 ◽  
Tio2 Nanotube ◽  
Doped Tio2 ◽  
Photodegradation Efficiency ◽  
Uv Light Irradiation ◽  
Fabrication And Characterization

CdS doped TiO2 nanotube composite was fabricated by chemical bath deposition, and was characterized by the structural, spectral and photoelectrochemical properties. The results of the structural and spectral properties showed that CdS particles were successfully deposited onto the surface of TiO2 nanotube. It is demonstrated that CdS doped TiO2 nanotube composite improved the light harvesting ability. Power conversion efficiency of about 0.32% was observed. This value is about 2.9 times higher than that of pure TiO2 nanotube. The CdS doped TiO2 nanotube composite possesses relatively higher photocatalytic activity and photodegradation efficiency than that of pure TiO2 nanotube under UV light irradiation, and the degradation efficiency of methyl orange was about 42% at UV intensity of 32 W.

Highly Efficient Photocatalysts Based on Lamellar-Shaped Bi2S3 Grown on TiO2 Monolith

NANO ◽  
2018 ◽  
Vol 13 (09) ◽  
pp. 1850110
Author(s):  
Kaidi Li ◽  
Fangfang Zhang ◽  
Huiming Wang ◽  
Yalan Zhou ◽  
Lixin Zhao ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Electrode Potential ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Light Irradiation ◽  
Molar Ratio ◽  
Step Method ◽  
Photodegradation Efficiency ◽  
Photodegradation Rate

Here, the lamellar-shaped Bi2S3 grown on a porous TiO2 monolith was obtained by a two-step method including a sol–gel route and hydrothermal treatment. The photocatalytic activity of the as-synthesized Bi2S3/TiO2 composites was evaluated for photodegradation of methylene blue (MB) dye in aqueous solution under the visible-light irradiation. Based on our experimental results, 5% (molar ratio of Bi2S3 to TiO[Formula: see text] Bi2S3/TiO2 photocatalysts exhibited a maximum photodegradation rate of MB up to 96.9% under visible-light irradiation for 120 min. Our findings indicated that the lamellar-shaped Bi2S3 can extend the light absorption up to visible areas, and porous TiO2 can provide enhanced specific surface area and more mass transfer pathway to enhance the photodegradation efficiency. Furthermore, porous TiO2 can accept the electrons from the Bi2S3 conduction band due to the relatively positive electrode potential to impede the photoproduced electron and hole combination to result in advanced photocatalytic performance.

Photocatalytic degradation of synthetic dye under sunlight

2007 ◽  
Vol 61 (1) ◽  
pp. 7-12 ◽  
Author(s):  
Dusan Mijin ◽  
Mirko Jugurdzija ◽  
Petar Jovancic
Keyword(s):  
Textile Industry ◽  
Heterogeneous Photocatalysis ◽  
Textile Dye ◽  
Synthetic Dyes ◽  
Chemical Methods ◽  
Dye Pollutants ◽  
Photodegradation Efficiency ◽  
Photodegradation Rate ◽  
Physico Chemical ◽  
Ph Increase

Synthetic dyes are widely used in the textile industry. Dye pollutants from the textile industry are an important source of environmental contamination. The majority of these dyes are toxic, mostly non-biodegradable and also resistant to decomposition by physico-chemical methods. Among new oxidation methods or "advanced oxidation processes", heterogeneous photocatalysis appears as an emerging destructive technology leading to the total mineralization of many organic pollutants. CI Basic Yellow 28 (BY28), commonly used as a textile dye, could be photocatalytically degraded using TiU2 as catalyst under sunlight. The effect of some parameters such as the initial catalyst concentration, initial dye concentration, initial NaCl and Na2CO3 concentrations, pH, H2O2 and type of catalyst on the degradation rate of BY28 was examined in details. The presence of NaCl and Na2CO3 led to inhibition of the photodegradation process. The highest photodegradation rate was observed at high pH, while the rate was the lowest at low pH. Increase of the initial H2O2 concentration increased the initial BY28 photodegradation efficiency. ZnO was a better catalyst than TiO2 at low dye concentrations.

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