Highly Porous MOF Adsorbent for Wastewater Treatment

Chauhan

J of Applied Polymer Sci

et al. 2019

This article presents candle soot (CS) as anticorrosion coating material for mild steel (MS) in 3.5 wt % of NaCl solution using potentiodynamic polarization and electrochemical impedance spectroscopy. CS is easily available, low-cost material, and characterized by using X-Ray diffraction (XRD), Raman spectroscopy, UV-vis spectroscopy, Fourier-transform infrared (FTIR), and scanning electron microscopy (SEM). CS is superhydrobhobic in nature that helps to prevent corrosion by repelling water molecules from MS surface. The electrochemical results confirmed the prevention in corrosion process for MS using candle soot-epoxy (CS-EP) based anticorrosion coatings. The CS-based coatings displayed outstanding barrier properties in 3.5 wt % of NaCl solution in comparison to the neat EP coating. Different candle CS-EP coating combinations were tested that exhibited excellent corrosion inhibition performance with highest protection increased up to 98.45% at 0.2 wt % of CS. The surface morphological studies were used to analyze the MS surface conditions in absence and presence of CS-EP coating in 3.5 wt % of NaCl solution. CS-EP admixtures were also tested for their shielding effectiveness in the frequency range of 8.2-12.4 GHz and it has been found that on incorporation of 0.2 wt % of CS in EP resin total shielding effectiveness (SE T ) increased to −5.3 dB as compared to −0.33 dB for neat EP.

Section: Resultsmentioning

confidence: 99%

Anticorrosion and electromagnetic interference shielding behavior of candle soot‐based epoxy coating

Chauhan

J of Applied Polymer Sci

et al. 2019

“…In order to investigate if the mass transfer or chemical reactions is the controlling mechanism of Cs(I) and Tl(I) adsorption onto Ce‐CPs or La‐CPs, the pseudo‐first‐order and pseudo‐second‐order kinetic models have been used for modeling the experimental data. [ 33–36 ] The kinetic model equations, parameters, and correlation coefficients are presented in Table 1.…”

Section: Resultsmentioning

confidence: 99%

Use of highly stable phosphonate coordination polymers as adsorbents for wastewater

Visa

Ilia

Lupa

et al. 2021

Applied Organom Chemis

A series of coordination polymers (CPs) based on phosphonates, M‐VP, and M‐Phen‐VP (M = Ce, La, Phen = 1,10‐phenanthroline, Im‐imidazole, VP = vinylphosphonate) were obtained by hydrothermal reactions in different conditions: room temperature, 75°C, 180°C, at pH 1.5–7 aqueous solutions. The materials were characterized by Fourier‐transform infrared (FTIR), X‐ray powder diffraction, and thermogravimetric analysis. The samples are characterized by a high degree of crystallinity, judging from the intensity of the peak in the 2θ region 8–9°. Thermogravimetric analysis performed on cerium and lanthanum CPs crystals indicate that the compounds are stable up to 360°C, after which it undergoes degradation corresponding to loss of the organic unit. The obtained materials were further used as adsorbent in the removal process of cesium (Cs(I)) and thalium ions (Tl(I)) from aqueous solutions. In order to establish the maximum adsorption capacity of the studied CPs and for the interpretation of the results obtained in the equilibrium study, several empirical isotherms were used: Freundlich, Temkin, Langmuir, and Dubinin–Radushkevich. The particular parameters for each isotherm and correlation coefficient (R2) have been determined.

“…The intense Raman band at 1611 cm −1 corresponds to graphitized amorphous hydrocarbons that appear because of sp 2 bonding and stretching of the C−C band. The Raman peak at 1611 cm −1 is calculated as the E 2 g mode of vibration . The second intense band at 1360 cm −1 is assigned A 1 g symmetry .…”

Section: Resultsmentioning

confidence: 99%

“…This symmetry appears due to sp 3 bonding nearby to the defect‐induced disordered lattice of amorphous hydrocarbons. Weak Raman bands at 1155 cm −1 and 1250 cm −1 are related to the molecular carbon substance of soot . Another weak band at 1510 cm −1 corresponds to the stretching vibration of the C=C band of disordered graphitic lattice .…”

Section: Resultsmentioning

confidence: 99%

Large Gain in Pyroelectric Energy Conversion through a Candle Soot Coating

et al. 2018

A large gain in pyroelectric voltage and current when exposed to infrared radiation after candle soot coating on material surfaces is reported. A piezoelectric buzzer is selected to quantify the effect of candle soot on pyroelectric output. For a given temperature change, the peak value of the open‐circuit voltage is enhanced from 2 V to 8 V and electric current is boosted from 15 nA to 95 nA. A load capacitor is also connected through a full wave rectifier. Energy storage in a 10 μF load capacitor is increased from 5 nJ to 70 nJ.