Synthesis And Characterization
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2022 ◽  
Vol 1249 ◽  
pp. 131529
Author(s):  
Hao Wang ◽  
Fan Yang ◽  
Shiang He ◽  
Yang Li ◽  
Yan Wu

2021 ◽  
Author(s):  
Raja Soma Sundaram Pillai ◽  
Rajesh Rajamoni ◽  
Indran Suyambulingam ◽  
Isaac Rajamony Suthies Goldy ◽  
Divya Divakaran

Electrochem ◽  
2021 ◽  
Vol 2 (4) ◽  
pp. 534-545
Author(s):  
Iris Denmark ◽  
Amna Khan ◽  
Taylor Scifres ◽  
Tito Viswanathan ◽  
Fumiya Watanabe ◽  
...  

Renewable resources and their byproducts are becoming of growing interest for alternative energy. Here, we have demonstrated the use of Arkansas’ most important crop, soy, as a carbon precursor for the synthesis of carbonized activated materials for supercapacitor applications. Different soy products (soymeal, defatted soymeal, soy flour and soy protein isolate) were converted into carbonized carbon and co-doped with phosphorus and nitrogen simultaneously, using a facile and time-effective microwave synthesis method. Ammonium polyphosphate was used as a doping agent which also absorbs microwave radiation. The surface morphology of the resulting carbonized materials was characterized in detail using scanning electron microscopy. X-ray photoelectron spectroscopy was also performed, which revealed the presence of a heteroelemental composition, along with different functional groups at the surface of the carbonized materials. Raman spectroscopy results depicted the presence of both a graphitic and defect carbon peak, with defect ratios of over one. The electrochemical performance of the materials was recorded using cyclic voltammetry in various electrolytes including acids, bases and salts. Among all the other materials, soymeal exhibited the highest specific capacitance value of 127 F/g in acidic electrolytes. These economic materials can be further tuned by changing the doping elements and their mole ratios to attain exceptional surface characteristics with improved specific capacitance values, in order to boost the economy of Arkansas, USA.


Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6085
Author(s):  
Fazal Ur Rehman ◽  
Rashid Mahmood ◽  
Manel Ben Ali ◽  
Amor Hedfi ◽  
Mohammed Almalki ◽  
...  

Bergenia ciliate (B. ciliate) leaf extract was used as a reducing and stabilizing agent for the synthesis of silver-copper oxide nanocomposite (Ag-CuO NC). Scanning and transmission electron microscopies (SEM and TEM) were used to examine the structural morphology, and the average particle size was determined to be 47.65 nm. The phase confirmation and crystalline structure were examined through the X-ray diffraction (XRD) technique, where cubic and monoclinic geometries were assigned to Ag and CuO. The energy dispersive X-ray (EDX), Fourier transform infrared (FTIR) and ultra-violet and visible (UV-Visible) spectroscopies were operated to analyse the elemental composition, functional groups and light absorption phenomena of the Ag-CuO NC. Under the full light spectrum, the photodegradation of Rhodamine 6G was recorded, and 99.42 percent of the dye degraded in 80 min. The Agar well diffusion method was followed to perform antibacterial activity against selected pathogens, and the activity was found to increase with increasing concentration of Ag-CuO NC. The ABTS free radical scavenging activity suggests that the activity of Ag-CuO NC is higher than ascorbic acid.


2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Sirajul Haq ◽  
Aqsa Waheed Raja ◽  
Sadiq Ur Rehman ◽  
Amine Mezni ◽  
Manel Ben Ali ◽  
...  

The NiO-ZnO nanocomposite (NiO-ZnO NC) was synthesized by ecofriendly process by using Diospyros kaki (D. kaki) extract of leaves as reducing and capping agents. X-ray diffraction (XRD) was used for examined crystallinity, cell dimensions, and crystallite size (7.6 nm). To determine the purity of sample and weight percentage, energy dispersive X-ray (EDX) is used. The surface morphology was determined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). By using Fourier transform infrared spectroscopy (FTIR), functional groups in samples were determined. By using diffuse reflectance data (DRS), band gap energy calculated via Tauc plot was 3.23 eV. The photocatalytic activity was checked against brilliant green (BG) and 4-nitrophenol (4-NP) and 92.5% and 69.7% of brilliant green (BG) and 4-nitrophenol (4-NP) were degraded with rate of degradation which were 0.0281 and 0.011 min−1.


2021 ◽  
Author(s):  
Mohammad taghi bagherian jamnani ◽  
Rahimeh Hajinasiri ◽  
Hossein Ghafuri ◽  
Zinatossadat Hossaini

Abstract Here, an impressive heterogeneous catalytic system, graphitic carbon nitride supported tris(hydroxymethyl)aminomethanem) g-C3N4/ THAM) is presented. The novel g-C3N4/ THAM nanocatalysts was characterized by analyzing methods such as FT-IR, EDX, XRD, TGA, and FESEM. Afterward, the performance of fabricated nanocatalyst g-C3N4/ THAM was suitably investigated in multicomponent reactions (MCRs) for the synthesis of 1,4-dihydropyridine and pyranopyrazole derivatives. By optimizing reported nanocatalyst, the corresponding reaction products were obtained with excellent efficiency and then the reversibility process was exanimated. The g-C3N4/ THAM nanocatalyst is environmentally friendly and was catalyzed the reactions in the presence of ethanol as a green solvent.


Author(s):  
Seyed Mousa Mousavi-Kouhi ◽  
Abdollah Beyk-Khormizi ◽  
Vahideh Mohammadzadeh ◽  
Mohammad Ashna ◽  
Ali Es-haghi ◽  
...  

Author(s):  
Kutluhan Utku Tümen ◽  
Burak Kıvrak ◽  
Fatih Özkan Alkurt ◽  
Mustafa Akyol ◽  
Muharrem Karaaslan ◽  
...  

2021 ◽  
Author(s):  
Ibrahim Erol ◽  
M. Onur Hoşsöz ◽  
Zeki Gurler

2021 ◽  
Vol 19 (9) ◽  
pp. 88-96
Author(s):  
Marwa Abdulameer Mseer ◽  
Khudheyer Jawad ◽  
Yahya Al-Khafaji

Heterocyclic compounds were prepared from Schiff bases triester derivatives, the first step was included, p- aminobenzoic acids convert to p-amino benzoyl chloride in the presence of thionyl chloride then glycerol was added to form triesters compound A. second step reaction of triester product with the 4-nitrobenzaldehyde, and 3-amino benzaldehyde to produce M1, and M2. The third step. Involve reacted Schiff bases triester derivatives to give heterocyclic compounds M1S, M1A, M2P, and M2K. The structure of all compounds is monitored by (TLC), and identified by many techniques 1HNMR, FT-IR, and melting point.


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