An efficient visible-light photocatalyst made from a nonpolar layered semiconductor by grafting electron-withdrawing organic molecules to its surface

2016 ◽  
Vol 52 (92) ◽  
pp. 13507-13510 ◽  
Author(s):  
Benyan Xu ◽  
Yang An ◽  
Yuanyuan Liu ◽  
Baibiao Huang ◽  
Xiaoyan Qin ◽  
...  
Keyword(s):  
Visible Light ◽  
Organic Molecules ◽  
Uv Light ◽  
Layered Semiconductor ◽  
Visible Light Photocatalyst ◽  
Chemically Modified

The UV-light responsive Bi2O2(HCOO)2 (BFM) becomes an efficient visible-light photocatalyst when it is chemically modified with 4-substituted electron-withdrawing thiophenolates −S-C6H4Z.

Preparation of visible light active S-doped TiO2 photocatalysts and their photocatalytic activities

2004 ◽  
Vol 49 (4) ◽  
pp. 159-163 ◽  
Author(s):  
T. Ohno
Keyword(s):  
Titanium Dioxide ◽  
Visible Light ◽  
Uv Light ◽  
Anatase Phase ◽  
Xps Spectra ◽  
Tio2 Photocatalysts ◽  
Chemically Modified ◽  
Tio2 Particles ◽  
Photocatalytic Activities ◽  
Visible Light Active

Although titanium dioxide photocatalysts having an anatase phase are a promising substrate for photodegradation of pollutants in water and air, their photocatalytic activities show only under UV light. To utilize solar light which has a large amount of visible light, the development of the photocatalysts whose activities show under visible light is one of the most important strategies. We have succeeded in synthesizing chemically modified titanium dioxide photocatalysts in which S (S4+) substitutes for some of the lattice titanium atoms. They show strong absorption for visible light and high activities for degradation of 2-propanol in aqueous solution and partial oxidation of adamantane in acetonitrile under irradiation at wavelengths longer than 440 nm. The oxidation state of the S atoms incorporated into the TiO2 particles is determined to be mainly S4+ from XPS spectra.

Silver Decorated Carbon Nanospheres as Effective Visible Light Photocatalyst

2013 ◽  
Vol 1509 ◽  
Author(s):  
W. Armstrong ◽  
B. Sapkota ◽  
S. R. Mishra
Keyword(s):  
Silver Nanoparticles ◽  
Visible Light ◽  
Amorphous Carbon ◽  
Uv Light ◽  
Low Cost ◽  
Hollow Spheres ◽  
Weight Ratio ◽  
Carbon Nanospheres ◽  
Visible Light Photocatalyst ◽  
Vis Spectroscopy

AbstractThe objective of this study was to assess usability of silver nanoparticles loaded on amorphous carbon (Ag-C) hollow nanospheres for the removal of Methylene Blue (MB) molecules from aqueous solutions. Using microwave technique, silver nanoparticles of different weight ratio was deposited onto amorphous carbon templates. The carbon hollow spheres were derived from glucose using hydrothermal technique. Interestingly crystallite size of Ag decreased with the silver loading on carbon nanospheres. Using UV-vis spectroscopy, the kinetics of MB removal from the solution was assessed. The degradation of MB followed pseudo-first-order kinetics. The obtained results showed that Ag-C particles are efficient MB degradation agent with the rate constant as high as 0.19 m-1 under visible light and 0.041 m -1 under UV light. Thus Ag-C particles are good alternative as low-cost scavenger of dye molecules in wastewater treatments.

Visible-Light Activated [2+2] Photocycloaddition Reaction Enabled Identification of Carbon-Carbon Double Bonds Position Isomerism in Structural Lipidomics

2020 ◽  
Author(s):  
Guifang Feng ◽  
Yanhong Hao ◽  
Liang Wu ◽  
Suming Chen
Keyword(s):  
Visible Light ◽  
Uv Light ◽  
Practical Importance ◽  
Side Reactions ◽  
Potential Health ◽  
Fundamental Interest ◽  
Unsaturated Lipids ◽  
Health Damage ◽  
Global Identification ◽  
Polyunsaturated Lipids

The photocycloaddition of olefins with carbonyls is of fundamental interest and practical importance in C=C bond location in unsaturated lipids. However, the traditional UV light activated [2+2] photocycloaddition reaction suffers side reactions and potential health damage. Here, we reported the first example of visible-light activated [2+2] photocycloaddition of anthraquinone with unsaturated lipids. This reaction showed great capability for locating the C=C bonds in various kinds of monounsaturated and polyunsaturated lipids by combining with tandem mass spectrometry (MS), such as fatty acids, phospholipids and glycerides. Based on this developed reaction, a workflow with liquid chromatography tandem MS method was developed for the global identification of unsaturated lipids in human serum, and 86 of monounsaturated and complicated polyunsaturated lipids were identified with definitive positions of C=C bonds. This approach provides new insights both on the photocycloaddition reactions and the structural lipidomics.

Green Synthesis of ZnO/Dy/NiO Heterostructures for Enhanced Photocatalytic Applications

2020 ◽  
Vol 1 (1) ◽  
pp. 30-36
Author(s):  
Shubha Jayachamarajapura Pranesh ◽  
Diwya Lanka
Keyword(s):  
Visible Light ◽  
Uv Light ◽  
Combustion Method ◽  
Hybrid Nanocomposites ◽  
Synthetic Dyes ◽  
Hybrid Nanostructure ◽  
Wide Range ◽  
Visible Light Active ◽  
Textile Industries ◽  
Photocatalytic Applications

Background: Textile industries discharge harmful synthetic dyes to nearby water sources. These colour effluents should be treated before discharge to reduce the toxicity caused by synthetic colours. Objective: To synthesize visible light active superstructures to reduce water pollution caused by textile industries. Methods: We have successfully synthesized ZnO/Dy/NiO hybrid nanocomposites using waste curd as fuel by a simple combustion method. The obtained material was able to reduce recombination and enhanced the photocatalytic degradation of organic pollutants. The as-synthesized material was characterized by XRD, absorption spectroscopy, FESEM, EDAX, etc. The obtained hybrid nanostructure was used as a photocatalyst for the degradation of methylene blue under sunlight, UV light as well as in dark. Comparative experiments were carried out with a variation of catalytic load, pH, dye concentrations, etc. for a better understanding of the performance of the catalyst at various conditions. Results and Conclusion: The ternary compound shows wide range of absorption by expanding absorption band both in UV and visible regions. ZnO/Dy/NiO hybrid nanocomposites performed well and showed uniqueness in the activity uder visible light.

Application of sand particles modified with NH2-MIL-101(Fe) as an efficient visible-light photocatalyst for Cr(VI) reduction

Chemosphere ◽  
2021 ◽  
Vol 268 ◽  
pp. 129365
Author(s):  
Sadra Sadeghian ◽  
Hossein Pourfakhar ◽  
Majid Baghdadi ◽  
Behnoush Aminzadeh
Keyword(s):  
Visible Light ◽  
Visible Light Photocatalyst ◽  
Sand Particles

Graphene oxide–ZnO nanocomposite: an efficient visible light photocatalyst for degradation of rhodamine B

2021 ◽  
Author(s):  
Asim Ali Yaqoob ◽  
Nur Habibah binti Mohd Noor ◽  
Khalid Umar ◽  
Rohana Adnan ◽  
Mohamad Nasir Mohamad Ibrahim ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Visible Light ◽  
Rhodamine B ◽  
Visible Light Photocatalyst

Why Does Bi2WO6 Visible-Light Photocatalyst Always Form as Nanoplatelets?

2020 ◽  
Vol 59 (13) ◽  
pp. 9364-9373
Author(s):  
Dipankar Saha ◽  
Espen D. Bøjesen ◽  
Aref Hasen Mamakhel ◽  
Bo B. Iversen
Keyword(s):  
Visible Light ◽  
Visible Light Photocatalyst

Surface-engineering strategies for g-C 3 N 4 as efficient visible-light photocatalyst

2017 ◽  
Vol 6 ◽  
pp. 57-62 ◽  
Author(s):  
Zhijun Li ◽  
Fazal Raziq ◽  
Chong Liu ◽  
Linlu Bai ◽  
Liqiang Jing
Keyword(s):  
Visible Light ◽  
Surface Engineering ◽  
Visible Light Photocatalyst
Sign in / Sign up

Export Citation Format

Share Document