Synergistic effects of sodium fluoride (NaF) on the crystallinity and band gap of Fe-doped TiO2 developed via microwave-assisted hydrothermal treatment

2020 ◽  
Vol 104 ◽  
pp. 109844 ◽  
Author(s):  
Majid Jahdi ◽  
Shivani B. Mishra ◽  
Edward N. Nxumalo ◽  
Sabelo D. Mhlanga ◽  
Ajay K. Mishra
Keyword(s):  
Band Gap ◽  
Hydrothermal Treatment ◽  
Sodium Fluoride ◽  
Synergistic Effects ◽  
Doped Tio2 ◽  
Microwave Assisted

New Insights into the Nature of the Band Gap of CuGeO3 Nanoparticles: Synthesis, Electronic Structure, and Optical and Photocatalytic Properties

2019 ◽  
Author(s):  
Victor Y. Suzuki ◽  
Luís Henrique Cardozo Amorin ◽  
Natália H. de Paula ◽  
Anderson R. Albuquerque ◽  
Julio Ricardo Sambrano ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Band Gap ◽  
Material Design ◽  
Photocatalytic Properties ◽  
Critical Parameters ◽  
Synthetic Approach ◽  
Microwave Assisted ◽  
Theoretical Approaches ◽  
Nanoparticles Synthesis ◽  
First Time

<p>We report, for the first time, new insights into the nature of the band gap of <a>CuGeO<sub>3</sub> </a>(CGO) nanocrystals synthesized from a microwave-assisted hydrothermal method in the presence of citrate. To the best of our knowledge, this synthetic approach has the shortest reaction time and it works at the lowest temperatures reported in the literature for the preparation of these materials. The influence of the surfactant on the structural, electronic, optical, and photocatalytic properties of CGO nanocrystals is discussed by a combination of experimental and theoretical approaches, and that results elucidates the nature of the band gap of synthetized CGO nanocrystals. We believe that this particular strategy is one of the most critical parameters for the development of innovative applications and that result could shed some light on the emerging material design with entirely new properties.</p> <p><b> </b></p>

Single-pot upgrading of run-of-mine coal and rice straw via Taguchi-optimized hydrothermal treatment: Fuel properties and synergistic effects

Energy ◽  
2021 ◽  
pp. 121482
Author(s):  
Sandile Fakudze ◽  
Yingyuan Wei ◽  
Qianqian Shang ◽  
Ru Ma ◽  
Yueh-Heng Li ◽  
...  
Keyword(s):  
Hydrothermal Treatment ◽  
Rice Straw ◽  
Synergistic Effects ◽  
Fuel Properties

scholarly journals Electronic, Structural, and Optical Structure of Mono-Doped and Co-Doped (210) TiO2 Brookite Surfaces for Application in Dye-Sensitized Solar Cells—A First Principles Study

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3918
Author(s):  
Ratshilumela S. Dima ◽  
Lutendo Phuthu ◽  
Nnditshedzeni E. Maluta ◽  
Joseph K. Kirui ◽  
Rapela R. Maphanga
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Dye Sensitized Solar Cells ◽  
Visible Region ◽  
Electromagnetic Spectrum ◽  
Doped Tio2 ◽  
Dye Sensitized ◽  
Sensitized Solar Cells ◽  
Co Doped ◽  
Optical Structure

Titanium dioxide (TiO2) polymorphs have recently gained a lot of attention in dye-sensitized solar cells (DSSCs). The brookite polymorph, among other TiO2 polymorphs, is now becoming the focus of research in DSSC applications, despite the difficulties in obtaining it as a pure phase experimentally. The current theoretical study used different nonmetals (C, S and N) and (C-S, C-N and S-N) as dopants and co-dopants, respectively, to investigate the effects of mono-doping and co-doping on the electronic, structural, and optical structure properties of (210) TiO2 brookite surfaces, which is the most exposed surface of brookite. The results show that due to the narrowing of the band gap and the presence of impurity levels in the band gap, all mono-doped and co-doped TiO2 brookite (210) surfaces exhibit some redshift. In particular, the C-doped, and C-N co-doped TiO2 brookite (210) surfaces exhibit better absorption in the visible region of the electromagnetic spectrum in comparison to the pure, S-doped, N-doped, C-S co-doped and N-S co-doped TiO2 brookite (210) surfaces.

Microwave-assisted synthesis of W1−xMoxO3·0.33H2O compounds with enhanced band gap

2016 ◽  
Vol 27 (6) ◽  
pp. 6003-6009
Author(s):  
A. Arzola-Rubio ◽  
J. Camarillo-Cisneros ◽  
V. Collins-Martínez ◽  
S. Miranda-Navarro ◽  
A. Vega-Ríos ◽  
...  
Keyword(s):  
Band Gap ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted

Synergistic catalytic action of vanadia–titania composites towards the microwave-assisted benzoin oxidation

2019 ◽  
Vol 48 (10) ◽  
pp. 3198-3203 ◽  
Author(s):  
Francesco Ferretti ◽  
Ana P. C. Ribeiro ◽  
Elisabete C. B. A. Alegria ◽  
Ana M. Ferraria ◽  
Maximilian N. Kopylovich ◽  
...  
Keyword(s):  
Synergistic Effects ◽  
Catalytic Action ◽  
Microwave Assisted ◽  
Chemical Efficiency ◽  
P Application

Application of synergistic effects is among the main ways to boost chemical efficiency.

scholarly journals Ionic-liquid-based synthesis of GaN nanoparticles

2020 ◽  
Vol 56 (15) ◽  
pp. 2312-2315 ◽  
Author(s):  
Hannah F. Gaiser ◽  
Radian Popescu ◽  
Dagmar Gerthsen ◽  
Claus Feldmann
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Quantum Yield ◽  
Band Gap ◽  
Green Emission ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted

GaN nanoparticles were prepared via microwave-assisted synthesis in ionic liquids. They are well-crystallized (β-GaN) and nanosized (3–8 nm), exhibit a band gap of 3.9 eV, and show green emission with a remarkable quantum yield of 55%.

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