Day: December 21, 2022

Gu, Lin published the artcileInsights into the role of an Fe-N active site in the oxygen reduction reaction on carbon-supported supramolecular catalysts, Product Details of C2H5N5, the main research area is iron nitrogen active site oxygen reduction carbon supramol catalyst.

In this study, a nitrogen-containing ligand supramol. named PPYTZ was successfully synthesized using 2,6-pyridinedicarboxylic acid chloride and 3,5-diamino-1,2,4-triazole in order to carry out oxygen reduction reaction (ORR). Such a polymer provides abundant coordination sites for iron ions, and the PPYTZ-Fe/C composite catalyst was formed with the PPYTZ-Fe complex loading on the surface of Vulcan XC-72 carbon. The phys. characteristics and ORR performance of the composite catalysts were characterized systematically via various relevant techniques, and their catalytic activity and reaction mechanism were evaluated and compared. The results showed that the catalytic activities and the reaction mechanism of ORR were highly dependent on the formation of an Fe-N unit. Accordingly, the PPYTZ-Fe/C catalyst containing Fe-N active sites exhibited high ORR catalytic activity (an onset potential of +0.86 V vs. RHE) in 0.1 M KOH. Such an Fe-N catalyst can accelerate the adsorption of O2 and increase the limiting c.d. (from 2.49 mA cm-2 to 4.98 mA cm-2), optimizing the ORR catalytic process from a two-electron process to a four-electron process (an n value of 3.8).

RSC Advances published new progress about Adsorption. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Product Details of C2H5N5.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Li, Yanqin published the artcileEffects of N-, P-, or O-containing ligands on gold-based complex catalysts for acetylene hydrochlorination, Recommanded Product: 4-Methoxyphenylacetic acid, the main research area is acetylene hydrochlorination nitrogen phosphorus oxygen ligand gold complex catalyst.

In line with the fulfillment of international Minamata Convention and the urgent need for developing non-mercury catalysts, Au-Lx/AC catalysts were synthesized and evaluated for the hydrochlorination of acetylene. The results showed that the interaction between ligands and Au species contributed to the enhanced catalytic activity with important and different roles of each ligand. Depending on the high electronegativity of heteroatoms, all the prepared catalysts had effectively improved their adsorption and activation capacity of hydrogen chloride. Specifically, the N-containing ligands in catalysts increased the dispersion of Au species and an enhanced adsorption of acetylene was observed While, the coordination of P-containing ligands with Au can increase the relative content of active Aun+ species and the O-containing ligands rather decreased the adsorption of acetylene. Furthermore, all the prepared Au-Lx/AC catalysts showed good stabilities based on the inhibition of the agglomeration of Au components or of coking deposition.

Applied Catalysis, A: General published new progress about Adsorption. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Recommanded Product: 4-Methoxyphenylacetic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Wang, Xuri published the artcileHollow, mesoporous, eutectic Zn1-xMgxO nano-spheres as solid acid-base catalysts for the highly regio-selective O-methylation of 1,2-diphenols, Computed Properties of 151-10-0, the main research area is magnesium zinc oxide methylation regioselective catalyst nanosphere composite kinetics.

The highly regio-selective O-methylation of catechol with di-Me carbonate (DMC), catalyzed by a solid acid-base catalyst, is an environmentally friendly chem. process for industrial production of guaiacol. However, a guaiacol yield below 84% and high reaction temperature above 280 °C limit its industrial application. Here, hollow, mesoporous Zn1-xMgxO nano-spheres with a eutectic structure, denoted as Zn1-xMgxO HMNSs (x = 0.012-0.089), are facilely fabricated via the calcination of Mg2+/Zn2+ ion-adsorbing carbon spheres at 500 °C in air. In the O-methylation of catechol with DMC at 180 °C, Zn1-xMgxO HMNSs (x = 0.052) afford guaiacol in 95.5% yield with a complete catechol conversion. Furthermore, 89.0-95.3% mono-ether yields with high 1,2-diphenol conversions (94.5-100%) are also obtained for the other 1,2-diphenols bearing -CH3 and -Br groups. Moreover, a plausible mechanism for highly selective O-methylation of catechol with DMC is proposed, in which the single-site activation and double-site activation of phenolic hydroxyls by the basic oxygen of Mg-O afford guaiacol and veratrole, resp.

Catalysis Science & Technology published new progress about Adsorption. 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Computed Properties of 151-10-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Xu, Jian published the artcileCatalytic degradation of diatrizoate by persulfate activation with peanut shell biochar-supported nano zero-valent iron in aqueous solution, Category: isoquinoline, the main research area is catalytic degradation diatrizoate persulfate peanut biochar iron aqueous solution; degradation; diatrizoate; nano zero-valent iron; peanut shell biochar; persulfate activated.

An emerging pollutant, diatrizoate (DTZ) has been frequently detected in aqueous solution Unique reticular peanut shell biochar (BC)-supported nano zero-valent iron (nZVI) composite (nZVI/BC) was successfully synthesized and used as a catalyst for activating persulfate (PS) to promote the removal of DTZ. The structure and morphol. of the nanocomposite materials were characterized by SEM, X-ray diffraction, Brunauer-Emmett-Teller measurements, and Fourier transform IR spectroscopy. The degradation of DTZ (20 mg L-1) was achieved by activating PS with the nanocomposite material. The removal of DTZ reached nearly 100% using 25 mM PS and 0.45 g L-1 nZVI/2BC (mass ratio of nZVI and BC at 1:2) nanocomposite material at pH 3.0 and 25°C. Influencing factors, such as dosages of nZVI/2BC and PS, temperature, and pH were also investigated. The mechanisms of PS activation with nZVI/2BC were discussed, including BC property, electron transfer, and the identification of free radicals in the reaction. The findings demonstrated that nZVI/BC-PS (peanut shell BC-supported nZVI activating PS) is a promising material for the treatment of refractory organic pollutants.

International Journal of Environmental Research and Public Health published new progress about Adsorption. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Category: isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Lin, Xiao-Tao published the artcileImmobilized Zn(OAc)2 on bipyridine-based periodic mesoporous organosilica for N-formylation of amines with CO2 and hydrosilanes, Computed Properties of 5961-59-1, the main research area is amide preparation; amine carbon dioxide phenylsilane formylation; zinc acetate bipyridine periodic mesoporous organosilica preparation catalyst.

Zinc acetate (Zn(OAc)2) was successfully immobilized on a bipyridine-based periodic mesoporous organosilica (BPy-PMO-TMS), as confirmed by solid-state NMR and energy-dispersive X-ray spectroscopies, X-ray diffractometry, and nitrogen adsorption/desorption isotherm analyses. The immobilized Zn complex, Zn(OAc)2(BPy-PMO-TMS), exhibited good catalytic activity during the N-formylations of amines and amides with CO2 and PhSiH3 to produce the corresponding formamides. Zn(OAc)2(BPy-PMO-TMS) with a lower Zn loading was found to exhibit higher catalytic activity.

New Journal of Chemistry published new progress about Adsorption. 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Computed Properties of 5961-59-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Clausen, Per Axel published the artcileBiocidal spray product exposure: Measured gas, particle, and surface concentrations compared with spray model simulations, Synthetic Route of 1205-17-0, the main research area is biocidal spray product simulation air pollution healt risk; Aerosols; ConsExpo Web; disinfectant; modeling.

The purpose of the study was to compare measured air and surface concentrations after application of biocidal spray products with concentrations simulated with the ConsExpo Web spray simulation tool. Three different biocidal spray products were applied in a 20 m3 climate test chamber with well-controlled environmental conditions (22 ± 1°C, 50 ± 2% relative humidity, and air exchange rate of 0.5 h-1). The products included an insect spray in a pressurized spray can, another insect spray product, and a disinfectant, the latter two applied sep. with the same pumped spray device. The measurements included released particles, airborne organic compounds in both gas and particle phase, and surface concentrations of organic compounds on the wall and floor in front of the spraying position and on the most remote wall. Spraying time was a few seconds and the air concentrations were measured by sampling on adsorbent tubes at 9-13 times points during 4 h after spraying. The full chamber experiment was repeated 2-3 times for each product. Due to sedimentation the concentrations of the particles in air decayed faster than explained by the air exchange rate. In spite of that, the non-volatile benzalkonium chlorides in the disinfectant could be measured in the air more than 30 min after spraying. ConsExpo Web simulated concentrations that were about half of the measured concentrations of the active substances when as many as possible of the default simulation parameters were replaced by the exptl. values. ConsExpo Web was unable to simulate the observed faster decay of the airborne concentrations of the active substances, which might be due to underestimation of the gravitational particle deposition rates. There was a relatively good agreement between measured surface concentrations on the floor and calculated values based on the dislodgeable amount given in the selected ConsExpo Web scenarios. It is suggested to always supplement simulation tool results with practical measurements when assessing the exposure to a spray product.

Journal of Occupational and Environmental Hygiene published new progress about Adsorption. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Synthetic Route of 1205-17-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Bouoidina, A. published the artcileAnisole derivatives as sustainable-green inhibitors for mild steel corrosion in 1 M HCl: DFT and molecular dynamic simulations approach, Related Products of isoquinoline, the main research area is anisole hydrochloric acid steel corrosion DFT mol dynamic simulation.

The search for new corrosion inhibitors, inexpensive and environmentally friendly as alternatives to various harmful synthetic compounds is one of the main challenges facing the chem. industry today. Hence, this work focused on the inhibition of corrosion of steel in 1 M HCl acid medium by three anisole derivatives, simples, economics, effectiveness, effectives and they have rarely been studied. The study of this series based on coupling theor. (DFT / Mol. Dynamic simulations) and electrochem. techniques revealed a very high inhibitory efficiency which exceeds 80% at an optimal concentration of 103 M for all inhibitors, with the compound P1 is the most effective. All these inhibitors obey the Langmuir isotherm and exhibit a mixed character by blocking, on the one hand, the reaction of the dissolution of anodic steel, and on the other hand, the reaction of cathodic reduction of hydrogen. Their adsorption takes place according to a charge transfer process by forming a protective film on the metal surface. A theor. calculation of the global and local quantum descriptors and mol. dynamic simulations has been undertaken to explain the mechanism of inhibition.

Journal of Molecular Liquids published new progress about Adsorption. 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ryde, Ingvild published the artcileVolatile organic compound emissions from subarctic mosses and lichens, COA of Formula: C8H10O2, the main research area is volatile organic compound emission concentration relative humidity statistical analysis.

Plant volatile organic compound (VOC) emissions can drive important climate feedbacks. Although mosses and lichens are important components of plant communities, their VOC emissions are poorly understood. It is crucial to obtain more knowledge on moss and lichen VOCs to improve ecosystem VOC emission models. This is especially relevant at high latitudes, where mosses and lichens are abundant and VOC emissions are expected to increase in response to climate change. In this study, we examined VOC emissions from four common moss (Hylocomium splendens, Pleurozium schreberi, Sphagnum warnstorfii, and Tomentypnum nitens) and lichen (Cladonia arbuscula, Cladonia mitis, Cladonia pleurota, and Nephroma arcticum) species in the Subarctic using gas chromatog.-mass spectrometry (GC-MS) and proton-transfer-reaction time-of-flight mass spectrometry. Moss and lichen VOC emissions were dominated by low mol. weight (LMW) VOCs, such as acetone and acetaldehyde, as well as hydrocarbons (HCs) and oxygenated VOCs (oVOCs). Of the studied mosses, S. warnstrofii had the highest and H. splendens had the lowest total VOC emission rates. The VOC emission blends of P. schreberi, S. warnstrofii, and T. nitens were clearly distinct from one another. Of the lichens, N. arcticum had a different VOC blend than the Cladonia spp. N. arcticum also had higher emission rates of HCs, oVOCs, and other GC-MS-based VOCs, but lower LMW VOC emission rates than the other lichen species. Our study demonstrates that mosses and lichens emit considerable amounts of various VOCs and that these emissions are species dependent.

Atmospheric Environment published new progress about Adsorbents. 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, COA of Formula: C8H10O2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Cheng, Xinying published the artcileA comparative study on adsorption behavior of iodinated X-ray contrast media iohexol and amidotrizoic acid by magnetic-activated carbon, Related Products of isoquinoline, the main research area is iohexol amidotrizoic acid carbon Xray adsorption wastewater treatment; Adsorption mechanism; Amidotrizoic acid; Co-adsorption; Density functional theory; Iohexol; Magnetic activated carbon.

Abstract : As persistent and ubiquitous contaminants in water, iodinated X-ray contrast media (ICM) pose a non-negligible risk to the environment and human health. In this study, we investigated the adsorption behavior of two typical ICM compounds, iohexol (IOH) and amidotrizoic acid (DTZ), on magnetic activated carbon. Theor. investigations, using d. functional theory, identified the mol. structures and calculated the mol. diameters of IOH (1.68 nm) and DTZ (1.16 nm), which revealed that ICM could be adsorbed by mesopores and larger micropores. Therefore, magnetic activated carbon with a porous structure was prepared by the co-precipitation method to investigate the adsorption mechanism of IOH and DTZ. MAC-5 (magnetic activated carbon with a theor. iron oxide content of 37%) showed the best adsorption ability for both IOH and DTZ, with maximum adsorption capacities of 86.05 and 43.00 mg g-1, resp. Adsorption kinetics and isotherm models were applied to explore the mechanisms involved, and the effects of solution pH, initial concentration, temperature, ionic strength, and natural organic matter were also investigated. The pore filling effect, π-π stacking, hydrogen bonding, and electrostatic interaction, were found to be the main adsorption mechanisms. The co-adsorption data showed that competition may occur in ICM coexisting environments. Interestingly, the used MAC-5 could be successfully regenerated and its adsorption efficiency did not decrease significantly after five cycles, indicating that it is a promising adsorbent for ICM. The results from this study provide some new insights for the treatment of water containing ICM.

Environmental Science and Pollution Research published new progress about Adsorbents. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Back, Jan O. published the artcileAdsorptive removal of micropollutants from wastewater with floating-fixed-bed gasification char, Recommanded Product: Diatrizoic Acid, the main research area is micro pollutant adsorptive removal floating ixedbed gasification char.

The global detection of organic micropollutants (OMPs) in waterbodies and the search for low-cost alternatives to fossil activated carbon have fostered research on the application of modified biochars in complex wastewater treatment plant (WWTP) effluents. Gasification char – a promising prospect for adsorptive OMP removal – was obtained as byproduct in a novel, multi-staged gasification process. The gasification system was designed for medium-scale energy production (530 kW combined heat and elec. power output) from spruce woodchips and relies on a floating-fixed-bed gasifier with a preceding pyrolysis step. For both tested adsorbents, high removal rates >90% of OMPs with high logD were found at an equivalent dosing of 60 mg l-1 FFBC ≈ 10 mg l-1 PAC, whereas X-ray contrast agents exhibited lower affinity. The governing removal mechanisms are hydrophobic and π-interactions, pore-size effects and – to a limited extent – hydrogen bond formation. Dissolved organic matter in WWTP effluent inhibits OMP adsorption, as observed in decreasing isotherm fitting parameters. The investigated bio-adsorbent – derived from renewable energy, regional supplies, and a process lean in the use of chems. – could be an inexpensive alternative in adsorptive wastewater treatment.

Journal of Environmental Chemical Engineering published new progress about Adsorbents. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Recommanded Product: Diatrizoic Acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem