scholarly journals Transition Metal Chalcogenide (TMC) Nanocomposites for Environmental Remediation Application over Extended Solar Irradiation

Nanocatalysts ◽  
2019 ◽  
Author(s):  
Sivagowri Shanmugaratnam ◽  
Shivatharsiny Rasalingam
Keyword(s):  
Transition Metal ◽  
Environmental Remediation ◽  
Solar Irradiation ◽  
Metal Chalcogenide

scholarly journals Recent Achievements in Development of TiO2-Based Composite Photocatalytic Materials for Solar Driven Water Purification and Water Splitting

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1338 ◽  
Author(s):  
Klara Perović ◽  
Francis M. dela Rosa ◽  
Marin Kovačić ◽  
Hrvoje Kušić ◽  
Urška Lavrenčič Štangar ◽  
...  
Keyword(s):  
Water Treatment ◽  
Transition Metal ◽  
Photocatalytic Degradation ◽  
Water Splitting ◽  
Water Purification ◽  
Degradation Mechanism ◽  
Living Environment ◽  
Solar Irradiation ◽  
Metal Chalcogenides ◽  
Photocatalytic Water Splitting

Clean water and the increased use of renewable energy are considered to be two of the main goals in the effort to achieve a sustainable living environment. The fulfillment of these goals may include the use of solar-driven photocatalytic processes that are found to be quite effective in water purification, as well as hydrogen generation. H2 production by water splitting and photocatalytic degradation of organic pollutants in water both rely on the formation of electron/hole (e−/h+) pairs at a semiconducting material upon its excitation by light with sufficient photon energy. Most of the photocatalytic studies involve the use of TiO2 and well-suited model compounds, either as sacrificial agents or pollutants. However, the wider application of this technology requires the harvesting of a broader spectrum of solar irradiation and the suppression of the recombination of photogenerated charge carriers. These limitations can be overcome by the use of different strategies, among which the focus is put on the creation of heterojunctions with another narrow bandgap semiconductor, which can provide high response in the visible light region. In this review paper, we report the most recent advances in the application of TiO2 based heterojunction (semiconductor-semiconductor) composites for photocatalytic water treatment and water splitting. This review article is subdivided into two major parts, namely Photocatalytic water treatment and Photocatalytic water splitting, to give a thorough examination of all achieved progress. The first part provides an overview on photocatalytic degradation mechanism principles, followed by the most recent applications for photocatalytic degradation and mineralization of contaminants of emerging concern (CEC), such as pharmaceuticals and pesticides with a critical insight into removal mechanism, while the second part focuses on fabrication of TiO2-based heterojunctions with carbon-based materials, transition metal oxides, transition metal chalcogenides, and multiple composites that were made of three or more semiconductor materials for photocatalytic water splitting.

Free-standing electrochemically coated MoSx based 3D-printed nanocarbon electrode for solid-state supercapacitor application

Nanoscale ◽  
2021 ◽  
Author(s):  
Kalyan Ghosh ◽  
Martin Pumera
Keyword(s):  
Solid State ◽  
Transition Metal ◽  
Electrochemical Deposition ◽  
Room Temperature ◽  
Free Standing ◽  
Metal Chalcogenide ◽  
Supercapacitor Application ◽  
3D Printed

Room temperature electrochemical deposition of transition metal chalcogenide (MoSx) on 3D-printed nanocarbon fibers based electrodes for custom shaped solid-state supercapacitor.

scholarly journals SnS2/TiO2 Nanocomposites for Hydrogen Production and Photodegradation Under Extended Solar Irradiation

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 589
Author(s):  
Sivagowri Shanmugaratnam ◽  
Balaranjan Selvaratnam ◽  
Aravind Baride ◽  
Ranjit Koodali ◽  
Punniamoorthy Ravirajan ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Environmental Remediation ◽  
High Performance ◽  
Degradation Mechanism ◽  
Solar Irradiation ◽  
Earth Abundant ◽  
Improved Performance ◽  
Chalcogenide Materials

Earth–abundant transition metal chalcogenide materials are of great research interest for energy production and environmental remediation, as they exhibit better photocatalytic activity due to their suitable electronic and optical properties. This study focuses on the photocatalytic activity of flower-like SnS2 nanoparticles (composed of nanosheet subunits) embedded in TiO2 synthesized by a facile hydrothermal method. The materials were characterized using different techniques, and their photocatalytic activity was assessed for hydrogen evolution reaction and the degradation of methylene blue. Among the catalysts studied, 10 wt. % of SnS2 loaded TiO2 nanocomposite shows an optimum hydrogen evolution rate of 195.55 µmolg−1, whereas 15 wt. % loading of SnS2 on TiO2 exhibits better performance against the degradation of methylene blue (MB) with the rate constant of 4.415 × 10−4 s−1 under solar simulated irradiation. The improved performance of these materials can be attributed to the effective photo-induced charge transfer and reduced recombination, which make these nanocomposite materials promising candidates for the development of high-performance next-generation photocatalyst materials. Further, scavenging experiments were carried out to confirm the reactive oxygen species (ROS) involved in the photocatalytic degradation. It can be observed that there was a 78% reduction in the rate of degradation when IPA was used as the scavenger, whereas around 95% reduction was attained while N2 was used as the scavenger. Notably, very low degradation (<5%) was attained when the dye alone was directly under solar irradiation. These results further validate that the •OH radical and the superoxide radicals can be acknowledged for the degradation mechanism of MB, and the enhancement of degradation efficiency may be due to the combined effect of in situ dye sensitization during the catalysis and the impregnation of low bandgap materials on TiO2.

Double Transition-Metal Chalcogenide as a High-Performance Lithium-Ion Battery Anode Material

2014 ◽  
Vol 53 (46) ◽  
pp. 17901-17908 ◽  
Author(s):  
Dongyun Chen ◽  
Ge Ji ◽  
Bo Ding ◽  
Yue Ma ◽  
Baihua Qu ◽  
...  
Keyword(s):  
Transition Metal ◽  
Lithium Ion Battery ◽  
Anode Material ◽  
High Performance ◽  
Lithium Ion ◽  
Metal Chalcogenide ◽  
Double Transition ◽  
Battery Anode

scholarly journals Frustrated magnetism in a Mott insulator based on a transition metal chalcogenide

2016 ◽  
Vol 683 ◽  
pp. 012025 ◽  
Author(s):  
S Kawamoto ◽  
T Higo ◽  
T Tomita ◽  
S Suzuki ◽  
Z M Tian ◽  
...  
Keyword(s):  
Transition Metal ◽  
Mott Insulator ◽  
Frustrated Magnetism ◽  
Metal Chalcogenide

Ternary core-shell structured transition metal chalcogenide for hybrid electrochemical capacitor

2018 ◽  
Vol 29 (12) ◽  
pp. 1799-1803 ◽  
Author(s):  
Hengqi Liu ◽  
Depeng Zhao ◽  
Pengfei Hu ◽  
Xiang Wu
Keyword(s):  
Transition Metal ◽  
Electrochemical Capacitor ◽  
Core Shell ◽  
Metal Chalcogenide

Manifestations of Quasi-Two-Dimensional Metallicity in a Layered Ternary Transition Metal Chalcogenide Ti2PTe2

2016 ◽  
Vol 28 (21) ◽  
pp. 7570-7573 ◽  
Author(s):  
Ji Seop Oh ◽  
Ho-Sung Yu ◽  
Chang-Jong Kang ◽  
Soobin Sinn ◽  
Moonsup Han ◽  
...  
Keyword(s):  
Transition Metal ◽  
Two Dimensional ◽  
Metal Chalcogenide

Activation of the Basal Plane in Two Dimensional Transition Metal Chalcogenide Nanostructures

2018 ◽  
Vol 140 (42) ◽  
pp. 13663-13671 ◽  
Author(s):  
Jae Hyo Han ◽  
Hong Ki Kim ◽  
Bongkwan Baek ◽  
Jeonghee Han ◽  
Hyun S. Ahn ◽  
...  
Keyword(s):  
Transition Metal ◽  
Basal Plane ◽  
Two Dimensional ◽  
Metal Chalcogenide

Highly active and stable layered ternary transition metal chalcogenide for hydrogen evolution reaction

Nano Energy ◽  
2016 ◽  
Vol 28 ◽  
pp. 366-372 ◽  
Author(s):  
Anand P. Tiwari ◽  
Doyoung Kim ◽  
Yongshin Kim ◽  
Om Prakash ◽  
Hyoyoung Lee
Keyword(s):  
Transition Metal ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Metal Chalcogenide ◽  
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