Novel MoSe2 hierarchical microspheres for applications in visible-light-driven advanced oxidation processes

Nanoscale ◽  
2015 ◽  
Vol 7 (47) ◽  
pp. 19970-19976 ◽  
Author(s):  
Chu Dai ◽  
Enping Qing ◽  
Yong Li ◽  
Zhaoxin Zhou ◽  
Chao Yang ◽  
...  
Keyword(s):  
Visible Light ◽  
Self Assembly ◽  
Advanced Oxidation Processes ◽  
Three Dimensional ◽  
Advanced Oxidation ◽  
Oxidation Processes ◽  
Hierarchical Microspheres ◽  
Molybdenum Diselenide ◽  
Visible Light Driven

Self-assembly of three-dimensional molybdenum diselenide hierarchical microspheres and their visible-light-driven advanced oxidation processes.

scholarly journals Synthesis, structure, and visible-light-driven activity of o-YbFeO3/h-YbFeO3/CeO2 photocatalysts

2021 ◽  
Vol 8 (4) ◽  
pp. 20218407
Author(s):  
Sofia M. Tikhanova ◽  
Lev A. Lebedev ◽  
Svetlana A. Kirillova ◽  
Maria V. Tomkovich ◽  
Vadim I. Popkov
Keyword(s):  
Visible Light ◽  
Cerium Dioxide ◽  
Advanced Oxidation Processes ◽  
Aqueous Media ◽  
Visible Region ◽  
Methyl Violet ◽  
Advanced Oxidation ◽  
Solution Combustion ◽  
Oxidation Processes ◽  
Method Of Solution

Photo-Fenton-like oxidation of organic substances is one of the key advanced oxidation processes based on the reversible Fe2+↔Fe3+ transition and the generation of a strong oxidant ·OH in the presence of H2O2 and is currently considered as a promising method for the purification of polluted aqueous media. However, the absence of effective and stable photocatalysts of this process, operating under the action of visible light, necessitates the exploratory studies, mainly among iron oxides and ferrites of various compositions and structures. In this work, using the method of solution combustion followed by heat treatment in air the heterojunction nanocomposites based on ytterbium orthoferrite and cerium dioxide of the composition o-YbFeO3/h-YbFeO3/CeO2 (0–20 mol.%) with high absorption in the visible region and advanced photo-Fenton-like activity were obtained. The nanocomposites were studied by EDS, SEM, XRD, BET, and DRS methods. The photo-Fenton-like activity of the nanocomposites was investigated during the degradation of methyl violet under the action of visible (λmax = 410 nm) radiation. As a result, the formation of I-type heterojunction based on stable rhombic (55.4–79.0 nm) and metastable hexagonal (19.5–24.0 nm) modifications of ytterbium orthoferrite (o-YbFeO3 and h-YbFeO3, respectively) and cubic cerium dioxide CeO2 (13.2–19.2 nm) nanocrystals was established. It was shown that the obtained nanocomposites had foamy morphology and were characterized by a specific surface in the range of 9.1–25.0 m2/g, depending on the CeO2 content. It was found that nanocrystalline components were chemically and phase-pure, uniformly spatially distributed over the nanocomposite, and had multiple contacts with each other. Based on this fact and the established electronic structure of the nanocomposite components, the formation of I-type heterojunction with the participation of o-YbFeO3 (Eg = 2.15 eV), h-YbFeO3 (Eg = 2.08 eV), and CeO2 (Eg = 2.38 eV) was shown, the presence of which increased photocatalytic activity of the resulting nanocomposite. The optimal content of CeO2 in the nanocomposite was 5%, and the o-YbFeO3/h-YbFeO3/CeO2–5% sample was characterized by the highest rate constant of photo-Fenton-like degradation of methyl violet under the action of visible light equal to k = 0.138 min–1, which was 2.5 to 5 times higher than for nanocomposites based on ytterbium orthoferrite. The obtained results obtained indicate that the developed nanocomposites can be considered as a promising basis for the advanced oxidation processes for the purification of aqueous media from organic pollutants.

Single-crystalline Bi2Fe4O9 synthesized by low-temperature co-precipitation: performance as photo- and Fenton catalysts

RSC Advances ◽  
2014 ◽  
Vol 4 (53) ◽  
pp. 27820-27829 ◽  
Author(s):  
Zhong-Ting Hu ◽  
Bo Chen ◽  
Teik-Thye Lim
Keyword(s):  
Low Temperature ◽  
Bisphenol A ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Light Irradiation ◽  
Single Crystalline ◽  
Oxidation Processes ◽  
Co Precipitation

A multi-functional self-assembled (001) Bi2Fe4O9 nanopad was firstly synthesized by co-precipitation at 95 °C, which can drive hybrid advanced oxidation processes (HAOPs) under visible-light irradiation for the efficient degradation of bisphenol A.

Self-assembled three-dimensional flowerlike Mn0.8Cd0.2S microspheres as efficient visible-light-driven photocatalysts for H2 evolution and CO2 reduction

2017 ◽  
Vol 7 (17) ◽  
pp. 3802-3811 ◽  
Author(s):  
Hong Liu ◽  
Jingchai Meng ◽  
Jiang Zhang
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Solvothermal Method ◽  
Three Dimensional ◽  
Co2 Reduction ◽  
H2 Evolution ◽  
Hierarchical Microspheres ◽  
Excellent Photocatalytic Activity ◽  
Visible Light Driven ◽  
Self Assembled

3D flowerlike Mn0.8Cd0.2S hierarchical microspheres assembled from nanosheets with excellent photocatalytic activity and stability were fabricated by a facile PVP-assisted solvothermal method.

Recent advances in single-atom catalysts for advanced oxidation processes in water purification

2021 ◽  
Vol 412 ◽  
pp. 125253
Author(s):  
Bingkun Huang ◽  
Zelin Wu ◽  
Hongyu Zhou ◽  
Jiayi Li ◽  
Chenying Zhou ◽  
...  
Keyword(s):  
Water Purification ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Single Atom ◽  
Oxidation Processes ◽  
Recent Advances
Sign in / Sign up

Export Citation Format

Share Document