CoTiO3 Nanoparticles as a Highly Active Heterogeneous Catalyst of Peroxymonosulfate for the Degradation of Organic Pollutants under Visible-Light Illumination

2016 ◽  
Vol 42 ◽  
pp. 73-79
Author(s):  
Fang Li Chi ◽  
Guo Dong Zhou ◽  
Biao Song ◽  
Bin Yang ◽  
Yao Hui Lv ◽  
...  
Keyword(s):  
Visible Light ◽  
Organic Pollutants ◽  
Sol Gel ◽  
Average Diameter ◽  
Light Illumination ◽  
Visible Light Photocatalysis ◽  
Catalytic Activation ◽  
Highly Active ◽  
Visible Light Illumination ◽  
Activation Efficiency

Visible light responsive CoTiO3 nanoparticles with average diameter of 100 nm were successfully synthesized by sol-gel method and were firstly applied to catalytic activation of peroxymonosulfate (PMS) for degradation of organic pollutants (Rhodamine B (RhB)). Photocatalytic experiments illustrated that CoTiO3 nanoparticles reveal good photocatalytic activity and excellent ability to activate PMS, the synergistic effect of visible light photocatalysis and sulfate radical generated from activated PMS can degradate RhB efficiently. Besides, CoTiO3 nanoparticles maintain their high photocatalytic and activation efficiency after three times recycling.

Ultrathin CdS shell-sensitized hollow S-doped CeO2 spheres for efficient visible-light photocatalysis

2019 ◽  
Vol 9 (6) ◽  
pp. 1357-1364 ◽  
Author(s):  
Ning-Chao Zheng ◽  
Ting Ouyang ◽  
Yibo Chen ◽  
Zhu Wang ◽  
Di-Yun Chen ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Shell Structure ◽  
Evolution Rate ◽  
Light Illumination ◽  
Visible Light Photocatalysis ◽  
Visible Light Illumination ◽  
Excellent Photocatalytic Activity ◽  
Systematic Effects ◽  
Doped Ceo2

By virtue of the systematic effects of S-doping on CeO2 and the ultrathin shell structure of CdS, the CeO2−xSx@CdS nanocomposite exhibits excellent photocatalytic activity under visible-light illumination for both H2 evolution (rate up to 1147.2 μmol g−1 h−1) and RhB degradation (efficiency reached 99.8%) as compared to CeO2, CeO2−xSx, and CdS.

Enhanced photocatalytic activity of Eu-doped Bi2S3 nanoflowers for degradation of organic pollutants under visible light illumination

2015 ◽  
Vol 5 (8) ◽  
pp. 4055-4063 ◽  
Author(s):  
Arpita Sarkar ◽  
Abhisek Brata Ghosh ◽  
Namrata Saha ◽  
Amit Kumar Dutta ◽  
Divesh N. Srivastava ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Organic Pollutants ◽  
Light Illumination ◽  
Visible Light Illumination ◽  
Visible Light Driven

Eu-doped Bi2S3 nanoflowers possess highly visible light driven photocatalytic activity towards degradation of organic pollutants.

scholarly journals Sulfur-, nitrogen- and platinum-doped titania thin films with high catalytic efficiency under visible-light illumination

2018 ◽  
Vol 9 ◽  
pp. 1629-1640 ◽  
Author(s):  
Boštjan Žener ◽  
Lev Matoh ◽  
Giorgio Carraro ◽  
Bojan Miljević ◽  
Romana Cerc Korošec
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Sol Gel ◽  
Catalytic Efficiency ◽  
Dip Coating ◽  
Light Illumination ◽  
Organic Pigment ◽  
Visible Light Illumination ◽  
Doped Titania

Titanium dioxide photocatalysts have received a lot of attention during the past decades due to their ability to degrade various organic pollutants to CO2 and H2O, which makes them suitable for use in environmental related fields such as air and water treatment and self-cleaning surfaces. In this work, titania thin films and powders were prepared by a particulate sol–gel route, using titanium tetrachloride (TiCl4) as a precursor. Afterwards, the prepared sols were doped with nitrogen (ammonium nitrate, urea), sulfur (thiourea) and platinum (chloroplatinic acid), coated onto glass substrates by dip-coating, and thermally treated in a muffle furnace to promote crystallization. The resulting thin films were then characterized by various techniques (i.e., TGA-DSC-MS, XRD, BET, XPS, SEM, band gap measurements). The photocatalytic activity of the prepared thin films was determined by measuring the degradation rate of plasmocorinth B (PB), an organic pigment used in the textile industry, which can pose an environmental risk when expelled into wastewater. A kinetic model for adsorption and subsequent degradation was used to fit the experimental data. The results have shown an increase in photocatalytic activity under visible-light illumination of nonmetal and metal doped and co-doped titania thin films compared to an undoped sample.

One step fabrication of novel Ag-CdS@EP floating photocatalyst for efficient degradation of organic pollutants under visible light illumination

2018 ◽  
Vol 47 (35) ◽  
pp. 12253-12263 ◽  
Author(s):  
Usman Ali Khan ◽  
Jianjun Liu ◽  
Jinbo Pan ◽  
Shengli Zuo ◽  
Hecheng Ma ◽  
...  
Keyword(s):  
Visible Light ◽  
Organic Pollutants ◽  
Ag Nanoparticles ◽  
Light Illumination ◽  
Expanded Perlite ◽  
Visible Light Illumination ◽  
One Step

In this paper, we present the fabrication of an expanded-perlite (EP)-based floating photocatalyst comprising CdS and Ag nanoparticles.

Highly active photocatalyst BixTiyVxO4x+2y(x≈y) for oxygen evolution under visible-light illumination

2008 ◽  
Vol 245 (9) ◽  
pp. 1807-1815 ◽  
Author(s):  
Haimei Liu ◽  
Akihito Imanishi ◽  
Ryuhei Nakamura ◽  
Yoshihiro Nakato
Keyword(s):  
Visible Light ◽  
Oxygen Evolution ◽  
Light Illumination ◽  
Highly Active ◽  
Visible Light Illumination

Synthesis of lanthanide-doped TiO2 nanoparticles and their photocatalytic activity under visible light

2019 ◽  
Vol 97 (9) ◽  
pp. 672-681 ◽  
Author(s):  
Vuyolwethu O. Ndabankulu ◽  
Suresh Maddila ◽  
Sreekantha B. Jonnalagadda
Keyword(s):  
Photocatalytic Activity ◽  
Catalytic Activity ◽  
Visible Light ◽  
Sol Gel ◽  
Analytical Techniques ◽  
The Other ◽  
Carbamic Acid ◽  
Light Illumination ◽  
Visible Light Illumination ◽  
Synthesized Materials

Four different lanthanide (Ce, Dy, Lu, and Sm) doped TiO2 mesoporous materials were synthesised using the sol–gel method with titanium (IV) isopropoxide as the precursor. All of the synthesized materials were characterised using different analytical techniques, BET, PXRD, TEM, SEM-EDX, Raman, FTIR, photoluminescence, and UV-DRS spectroscopy. Photocatalytic activity and efficacy of the materials in the degradation of caffeine in aqueous solutions was investigated under visible light illumination. Although all materials showed good photocatalytic activity, Ce-doped TiO2 exhibited relatively better activity than the other three catalysts. High photoactivity of the catalysts was attributed to the presence of lanthanides and their ability to generate ions that scavenge electrons under visible light, thereby enhancing photodegradation of caffeine. All materials proved to be good and were recyclable without loss of catalytic activity up to three runs. An intermediate [N-1,3,6-trimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)formamide] (TDTF) and two products (6-amino-1,3-dimethyl-2,4-dioxo-1,2,3,4-tetrahydropymidin-5-ly)-(methyl)-carbamic acid (ATCA) and N-methyl-N-(methylcarbomoyl)-2-oxoacetamide (MMO) were identified by the LC–MS spectra.

scholarly journals Photodehydrogenation of Ethanol over Cu2O/TiO2 Heterostructures

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1399
Author(s):  
Congcong Xing ◽  
Yu Zhang ◽  
Yongpeng Liu ◽  
Xiang Wang ◽  
Junshan Li ◽  
...  
Keyword(s):  
Visible Light ◽  
Chemical Properties ◽  
Cost Effective ◽  
Light Illumination ◽  
Reaction Conditions ◽  
One Pot ◽  
Highly Active ◽  
Visible Light Illumination ◽  
Photocatalytic Reactors ◽  
Acetaldehyde Production

The photodehydrogenation of ethanol is a sustainable and potentially cost-effective strategy to produce hydrogen and acetaldehyde from renewable resources. The optimization of this process requires the use of highly active, stable and selective photocatalytic materials based on abundant elements and the proper adjustment of the reaction conditions, including temperature. In this work, Cu2O-TiO2 type-II heterojunctions with different Cu2O amounts are obtained by a one-pot hydrothermal method. The structural and chemical properties of the produced materials and their activity toward ethanol photodehydrogenation under UV and visible light illumination are evaluated. The Cu2O-TiO2 photocatalysts exhibit a high selectivity toward acetaldehyde production and up to tenfold higher hydrogen evolution rates compared to bare TiO2. We further discern here the influence of temperature and visible light absorption on the photocatalytic performance. Our results point toward the combination of energy sources in thermo-photocatalytic reactors as an efficient strategy for solar energy conversion.

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