Templated Solid-State Fabrication of Quadrangled Mn–Co Mesoporous Oxides for Degradation of Methylene Blue in Water

2019 ◽  
Vol 36 (9) ◽  
pp. 1199-1205 ◽  
Author(s):  
Qian Liu ◽  
Qingwen Wang ◽  
Wenyong Deng ◽  
Lei Gong ◽  
Tingting Sun ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Solid State ◽  
Mesoporous Oxides

scholarly journals Zirconium-Doped Chromium IV Oxide Nanocomposites: Synthesis, Characterization, and Photocatalysis towards the Degradation of Organic Dyes

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 117
Author(s):  
Zahir Muhammad ◽  
Farman Ali ◽  
Muhammad Sajjad ◽  
Nisar Ali ◽  
Muhammad Bilal ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Solid State ◽  
Room Temperature ◽  
Organic Dyes ◽  
Uv Light ◽  
Heterogeneous Photocatalysis ◽  
Ft Ir ◽  
Complete Mineralization

Degradation of organic dyes and their byproducts by heterogeneous photocatalysts is an essential process, as these dyes can be potentially discharged in wastewater and threaten aquatic and xerophyte life. Therefore, their complete mineralization into nontoxic components (water and salt) is necessary through the process of heterogeneous photocatalysis. In this study, Zr/CrO2 (Zirconium-doped chromium IV oxide) nanocomposite-based photocatalysts with different compositions (1, 3, 5, 7 & 9 wt.%) were prepared by an environmentally friendly, solid-state reaction at room temperature. The as-prepared samples were calcined under air at 450 °C in a furnace for a specific period of time. The synthesis of Zr/CrO2 photocatalysts was confirmed by various techniques, including XRD, SEM, EDX, FT-IR, UV-Vis, and BET. The photocatalytic properties of all samples were tested towards the degradation of methylene blue and methyl orange organic dyes under UV light. The results revealed a concentration-dependent photocatalytic activity of photocatalysts, which increased the amount of dopant (up to 5 wt.%). However, the degradation efficiency of the catalysts decreased upon further increasing the amount of dopant due to the recombination of holes and photoexcited electrons.

High-performance flexible redox supercapacitors induced by methylene blue with a wide voltage window

2018 ◽  
Vol 2 (2) ◽  
pp. 357-360 ◽  
Author(s):  
Chunmei Xu ◽  
Haiyan Wang ◽  
Jiang Deng ◽  
Yong Wang
Keyword(s):  
Methylene Blue ◽  
Solid State ◽  
High Performance ◽  
Porous Electrode ◽  
Operating Voltage ◽  
Solid State Electrolyte ◽  
Wide Operating

Coupling a porous electrode with methylene blue in a solid-state electrolyte resulted in high EDLC, wide operating voltage window, and enhanced faradaic pseudocapacitance.

Solid‐State Synthesis of Silver Nanoparticles and Their Catalytic Application in Methylene Blue Reduction

2020 ◽  
Vol 5 (34) ◽  
pp. 10488-10494
Author(s):  
Djordje N. Veljović ◽  
Dejan M. Gurešić ◽  
Anja B. Jokić ◽  
Vesna M. Vasić ◽  
Bojana B. Laban
Keyword(s):  
Methylene Blue ◽  
Silver Nanoparticles ◽  
Solid State ◽  
Solid State Synthesis ◽  
Catalytic Application ◽  
Methylene Blue Reduction

scholarly journals A Solid-State Pathway towards the Tunable Carboxylation of Cellulosic Fabrics: Controlling the Surface’s Acidity

Membranes ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 514
Author(s):  
Eugenio H. Otal ◽  
Manuela L. Kim ◽  
Juan P. Hinestroza ◽  
Mutsumi Kimura
Keyword(s):  
Methylene Blue ◽  
Surface Modification ◽  
High Temperature ◽  
Solid State ◽  
Effect Of Temperature ◽  
Cationic Dye ◽  
Kinetics Of Adsorption ◽  
Starting Point ◽  
Reaction Proceeds ◽  
Kinetics Of

We report on a tunable solid-state approach to modify the acidity of cotton substrates using citric, oxalic, and fumaric acids. The first stage of the method involves soaking the cotton swatches in an ethanolic saturated solution of the corresponding acid. After drying, the carboxylation reaction proceeds at high temperature (T > 100 °C) and in solid state. We quantified the effect of temperature and reaction time on the solid-state carboxylation reaction, which allowed us to tune the carboxylation degree and the acidity of the surface. We characterized the modified cotton by performing adsorption isotherms and by determining the kinetics of adsorption of a cationic dye: methylene blue (MB). We found that the MB uptake kinetics varied as a function of the acidic strength of the surface, which is closely related to the strength of the acid used for surface modification. The proposed solid-state cotton carboxylation procedure allows us to achieve sustainable cotton modification, which constitutes a starting point for several applications using cotton as the substrate.

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