Tag: M.W=150-200

Zhang, Congyu published the artcileComparative indexes, fuel characterization and thermogravimetric- Fourier transform infrared spectrometer-mass spectrogram (TG-FTIR-MS) analysis of microalga Nannochloropsis Oceanica under oxidative and inert torrefaction, Category: piperidines, the publication is Energy (Oxford, United Kingdom) (2021), 120824, database is CAplus.

The torrefaction performances of microalga Nannochloropsis Oceanica under oxidative and inert atmospheres are characterized and compared with each other based on several operating parameters. By conducting several comparative indexes, the results suggest that oxidative torrefaction is more capable of upgrading microalgae due to its relatively lower solid yield and energy input, as well as relatively higher enhancement factor and upgrading energy index. Compared to inert torrefaction, the indexes indicate that oxidative torrefaction at 250°C for 30 min has higher energy yield (1.02 times) and energy efficiency (2.2 times) but whereas lower energy input (0.4 times). With increasing torrefaction severity, the pyrolysis curve gradually becomes smooth and shift to a high-temperature zone. The peak temperatures of torrefied microalgae present an increasing trend, especially in the oxidative atm. After oxidative torrefaction, microalgal solid biofuel is upgraded as peat and lignite, from the viewpoint of elemental composition Furthermore, oxidative torrefaction is more suitable than inert torrefaction for producing bio-oil which mainly contains dianhydromannitol, neophytadiene, and palmitoleic acid. The TG-FTIR-MS results uncover the pyrolysis characteristics and reactivity of torrefied microalgae, and elucidate that oxidative torrefied microalgae is more reactive.

Energy (Oxford, United Kingdom) published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C7H7ClN2S, Category: piperidines.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Liang, Dongmin published the artcileHighly efficient catalytic ozonation for ammonium in water upon γ-Al₂O₃@Fe/Mg with acidic-basic sites and oxygen vacancies, Product Details of C9H17NO, the publication is Science of the Total Environment (2022), 155278, database is CAplus and MEDLINE.

Catalytic ozonation has prospects in the advanced treatment of nitrogen removal, and solid base MgO can efficiently catalyze the ozonation of ammonium nitrogen. However, it is necessary to improve the problem of easy loss, difficult recovery, and low percentage of gaseous products. Here, MgO, amorphous Fe₂O₃,and γ-Al₂O₃ were selected as dopingcomponents and supports, resp., to prepare γ-Al₂O₃@Fe/Mg composite catalysts with abundant acidic-basicsites and oxygen vacancies. The results show that γ-Al₂O₃@Fe/Mg₅ can efficiently catalyze the ozonation of ammonium nitrogen (98.73%) with 67.82% gaseous product selectivity under the conditions of initial pH = 7, catalyst dosage of 112.88 g/L, and ozone dosage of 2.4 mg/min. The doping of Fe₂O₃ and MgO with a weaker lattice oxygen binding energy improves the gaseous product selectivity. The mechanism of ammonium nitrogen removal for γ-Al₂O₃@Fe/Mg₅ is revealed, especially the intrinsic contribution of acidic-basic sites and oxygen vacancies. The pH and active sites play different roles in ozone decomposition for NH₄⁺ removal. Surface hydroxyl protonation on basic sites and oxygen vacancies and electron transfer on acidic sites are responsible for ozone decomposition to hydroxyl radicals. Moreover, γ-Al₂O₃@Fe/Mg₅ exhibits good stability, few leaching ions, and can be settled in waterfor easy recovery. This study suggests that γ-Al₂O₃@Fe/Mg₅ is a good candidate for the catalytic ozonation of ammonium nitrogen.

Science of the Total Environment published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C9H17NO, Product Details of C9H17NO.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Ke, Ming-Kun published the artcileInterface-Promoted Direct Oxidation of p-Arsanilic Acid and Removal of Total Arsenic by the Coupling of Peroxymonosulfate and Mn-Fe-Mixed Oxide, Recommanded Product: 2,2,6,6-Tetramethylpiperidin-4-one, the publication is Environmental Science & Technology (2021), 55(10), 7063-7071, database is CAplus and MEDLINE.

As one of the extensively used feed additives in livestock and poultry breeding, p-arsanilic acid (p-ASA) has become an organoarsenic pollutant with great concern. For the efficient removal of p-ASA from water, the combination of chem. oxidation and adsorption is recognized as a promising process. Herein, hollow/porous Mn-Fe-mixed oxide (MnFeO) nanocubes were synthesized and used in coupling with peroxymonosulfate (PMS) to oxidize p-ASA and remove the total arsenic (As). Under acidic conditions, both p-ASA and total As could be completely removed in the PMS/MnFeO process and the overall performance was substantially better than that of the Mn/Fe monometallic system. More importantly, an interface-promoted direct oxidation mechanism was found in the p-ASA-involved PMS/MnFeO system. Rather than activate PMS to generate reactive oxygen species (i.e., SO₄^·-, ·OH, and ¹O₂), the MnFeO nanocubes first adsorbed p-ASA to form a ligand-oxide interface, which improved the oxidation of the adsorbed p-ASA by PMS and ultimately enhanced the removal of the total As. Such a direct oxidation process achieved selective oxidation of p-ASA and avoidance of severe interference from the commonly present constituents in real water samples. After facile elution with dilute alkali solution, the used MnFeO nanocubes exhibited superior recyclability in the repeated p-ASA removal experiments Therefore, this work provides a promising approach for efficient abatement of phenylarsenical-caused water pollution based on the PMS/MnFeO oxidation process.

Environmental Science & Technology published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C9H17NO, Recommanded Product: 2,2,6,6-Tetramethylpiperidin-4-one.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Wang, Gen published the artcileActivation of peroxydisulfate by defect-rich CuO nanoparticles supported on layered MgO for organic pollutants degradation: An electron transfer mechanism, Quality Control of 826-36-8, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2022), 431(Part_1), 134026, database is CAplus.

Heterogeneous activation of peroxydisulfate (PDS) by transition metal oxides offers a promising strategy for organic pollutants removal but suffers from low electron transfer efficiency. Herein, layered MgO supported CuO nanoparticles was prepared by thermal conversion of metal-phenolic networks of Cu²⁺/Mg²⁺ and tannic acid. CuO nanoparticles (â‰? nm) were spatial monodispersed on layered MgO, inducing the formation of electron deficient Cu³⁺ and surface oxygen vacancies and thus facilitated adsorption and activation of PDS. The electron-rich CuO/MgO hybrid catalysts manifested good catalytic performance of PDS activation for organic pollutants removal. At 0.18 g/L of CuO/MgO hybrid catalyst and 0.2 mM of PDS, complete removal of bisphenol A (BPA) was achieved with a high kinetic constant (0.1 min^-1, 50 min). Quenching experiments, ESR tests, PDS decomposition behaviors, electrochem. anal. and in situ ATR-FTIR and Raman spectroscopy revealed a nonradical pathway of electron transfer for PDS activation. The CuO/MgO hybrid catalysts exhibited wide working pH range from 3 to 11, selective oxidation capability, good resistance to halide ion and high utilization efficiency of PDS, and thus would be a promising candidate for wastewater remediation.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C5H5ClIN, Quality Control of 826-36-8.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Hu, Bo published the artcileFive-Membered Ring Nitroxide Radical: A New Class of High-Potential, Stable Catholyte for Neutral Aqueous Organic Redox Flow Batteries, COA of Formula: C9H17NO, the publication is Advanced Functional Materials (2021), 31(35), 2102734, database is CAplus.

The utilization of redox-active and stable cyclic nitroxide radicals (CNRs) holds a great promise in neutral aqueous organic redox flow batteries (AORFBs) for large-scale energy storage. Herein, a new class of CNRs with five-membered ring pyrrolidine and pyrroline motifs for AORFBs is reported. By rational mol. engineering of introducing CC double bond into the pyrrolidine-based mol., 3-carbamoyl-2,2,5,5-tetramethylpyrroline-1-oxyl (CPL) with a high redox potential of 0.76 V (vs Ag/AgCl) is demonstrated, which is 160 mV higher than the common 2,2,6,6-tetramethylpiperidine 1-oxyl derivatives with a six-membered ring as the core structure. D. functional theory calculations reveal that the much enhanced redox potential for CPL is largely contributed by lowered standard free energy in reduction reaction and charge population sum of NO radical head. When paired with the BTMAP-viologen anolyte, the CPL-based AORFB delivers constant capacity retention of up to 99.96%/cycle over 500 cycles.

Advanced Functional Materials published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C9H17NO, COA of Formula: C9H17NO.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Shen, Zhuo published the artcileFe-based carbonitride as Fenton-like catalyst for the elimination of organic contaminants, Formula: C9H17NO, the publication is Environmental Research (2021), 110486, database is CAplus and MEDLINE.

The Fenton-like process has been regarded as a clean and efficient approach to generate reactive oxygen species (ROS) to deal with the ever-growing environmental pollution. However, developing improved catalysts with adequate activity and stability remains a long-term goal for practical application. Herein, crystalline carbon nanotubes (CNTs) interconnected Fe/Fe₃C-doped nanoporous carbonitride (Fe-NC) was easily prepared by the pyrolysis of ZIF-8 confined with Fe³⁺. The obtained Fe-NCs possessed high degrees of graphitic carbon and nitrogen. Such Fe-NCs can enhance the activation of peroxymonosulfate (PMS) for the removal of multiple organic contaminants. The optimized Fe-NC/PMS system exhibited impressive catalytic performance, with a TOF as high as 4.43 min^-1 for 3BF degradation, and the removal efficiency of other dyes, phenols and antibiotics was up to 96.2% within 10 min. The removal efficiency of 3BF was 93.4% within 10 min with extremely low Fe ions leaching (<0.052 mg/L) even after 5 cycles. In addition, the effects of pH on the catalytic performance demonstrated that the decomposition of 3BF exceeded 95.6% even when the initial pH varied from 5 to 10. We confirmed that SO₄·^–, ·OH, O₂·^–,and ¹O₂ ere generated in the catalytic system of Fe-NC/PMS, which played a critical role in degrading the organics These findings provide new insights into the design of environmentally friendly Fenton-like catalysts with high efficiency and favorable stability in environmental remediation.

Environmental Research published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C44H28ClFeN4, Formula: C9H17NO.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Zeng, Zhenxing published the artcileEnergy-transfer-mediated oxygen activation in carbonyl functionalized carbon nitride nanosheets for high-efficient photocatalytic water disinfection and organic pollutants degradation, Product Details of C9H17NO, the publication is Water Research (2020), 115798, database is CAplus and MEDLINE.

Polymeric photocatalysts are promising candidates for water purification, however their catalytic performance are still unsatisfactory due to the fast charge recombination that leads to low reactive oxygen radicals production In this study, a conceptual energy-transfer-mediated photocatalytic oxygen activation system over polymeric carbon nitride without the need of electron-hole separation is proposed, exhibiting remarkable singlet oxygen triggered bacteria inactivation performance as well as organic pollutants degradation By structure and excitonic effect modulation, the oxygen activation process changes from the traditional electron-transfer mechanism to the final energy-transfer pathway, leading to the selective generation of singlet oxygen with high efficiency. The generated singlet oxygen is found to fervently attack the bacteria membrane, creating irreparable pores or holes on the cell membrane for cytoplasmic contents leaking out to accelerate bacteria destruction. The work demonstrated here offers a new photocatalytic oxygen activation pathway for achieving high-efficient reactive oxygen species generation performance without the need of charge separation

Water Research published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C9H9ClN2, Product Details of C9H17NO.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Nematian, Tahereh published the artcileOne-pot conversion of sesame cake to low N-content biodiesel via nano-catalytic supercritical methanol, Name: 2,2,6,6-Tetramethylpiperidin-4-one, the publication is Renewable Energy (2021), 964-973, database is CAplus.

The fatty acid Me esters (FAMEs) and H2 were produced from sesame cake in supercritical mixture of methanol and water using alumina supported CaO and MgO nanoparticles. The fresh and used catalysts were characterized by ICP-OES, BET, XRD, and TEM techniques. The significant influence of catalysts on the gas production was revealed. Further, the highest amounts of H2, CO, and CO₂ was achieved by MgO/ γ-Al₂O₃ with the hydrogen fraction more than 7.6 times, compared with the non-catalytic process. For biodiesel, CaO/ γ-Al₂O₃ showed the best performance where 35.3% of the liquid product was FAMEs, more than 2.3 times relative to the non-catalytic process. In order to reduce the amounts of nitrogenate content in the liquid fuel, an efficient and scalable method implemented with the Soxhlet apparatus and the absorption tube equipped with CO₂ gas flow system. Accordingly, the N-contents of the liquid products were reduced to highest degree of 65.2%, asserting that the reduced amount of the N-content strongly depends on the catalyst during the production process.

Renewable Energy published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C9H17NO, Name: 2,2,6,6-Tetramethylpiperidin-4-one.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Peng, Chuan published the artcileLow temperature co-pyrolysis of food waste with PVC-derived char: Products distributions, char properties and mechanism of bio-oil upgrading, Recommanded Product: 2,2,6,6-Tetramethylpiperidin-4-one, the publication is Energy (Oxford, United Kingdom) (2021), 119670, database is CAplus.

The main components of municipal solid waste (MSW) include food waste (FW) and polyvinyl chloride (PVC), which present an opportunity to convert energy or value-added products through low-temperature synergetic pyrolysis. In this study, the characteristics of char and bio-oil derived from MSW, FW and PVC feedstocks via pyrolysis at relatively low temperatures (200-300 °C) for 60 min were investigated. The results revealed that the transformation of PVC to HCl gas production started at a temperature of > 200 °C. The oxygenated carbon groups on the char surface were decomposed at elevated reaction temperatures The relative mol. mass of bio-oil derived from FW increased when PVC-derived char was used as a catalyst at 250 °C. In addition, active functional groups and pore structures were formed through synergistic pyrolysis. This work provides information regarding the possible route underlying the network of char and bio-oil production from the synergistic conversion of FW and PVC-derived char.

Energy (Oxford, United Kingdom) published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C9H17NO, Recommanded Product: 2,2,6,6-Tetramethylpiperidin-4-one.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem

Cunha, Anna C. published the artcileChemistry and anti-herpes simplex virus type 1 evaluation of 4-substituted-1H-1,2,3-triazole-nitroxyl-linked hybrids, Product Details of C9H17NO, the publication is Molecular Diversity (2021), 25(4), 2035-2043, database is CAplus and MEDLINE.

Abstract: HSV disease is distributed worldwide. Anti-herpesvirus drugs are a problem in clin. settings, particularly in immunocompromised individuals undergoing herpes simplex virus type 1 infection. In this work, 4-substituted-1,2,3-1H-1,2,3-triazole linked nitroxyl radical derived from TEMPOL were synthesized, and their ability to inhibit the in vitro replication of HSV-1 was evaluated. The nitroxide derivatives were characterized by IR spectroscopy and elemental anal., and three of them had their crystal structures determined by single-crystal X-ray diffraction. Four hybrid mols. showed important anti-HSV-1 activity with IC₅₀ values ranged from 0.80 to 1.32μM. In particular, one of the nitroxide derivatives was more active than Acyclovir (IC₅₀ = 0.99μM). All compounds tested were more selective inhibitors than the reference antiviral drug. Among them, two compounds were 4.5 (IC₅₀ 0.80μM; selectivity index CC₅₀/IC₅₀ 3886) and 7.7 times (IC₅₀ 1.10μM; selectivity index CC₅₀/IC₅₀ 6698) more selective than acyclovir (IC₅₀ 0.99μM; selectivity index CC₅₀/IC₅₀: 869). These nitroxide derivatives may be elected as leading compounds due to their antiherpetic activities and good selectivity.

Molecular Diversity published new progress about 826-36-8. 826-36-8 belongs to piperidines, auxiliary class Natural product, name is 2,2,6,6-Tetramethylpiperidin-4-one, and the molecular formula is C9H17NO, Product Details of C9H17NO.

Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem