Tag: M.W=150-200

Cai, Weijie published the artcileMagnetic iron phosphide particles mediated peroxymonosulfate activation for highly efficient elimination of sulfonamide antibiotics, COA of Formula: C9H17NO, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2020), 125279, database is CAplus.

transition metal phosphides (TMP) have emerged as a promising catalyst in the environmental catalysis field due to excellent catalytic properties, high conductivity, and long stability. spherical, coral-like iron phosphide (Fe_xP) particles containing FeP orthorhombic and Fe₂P hexagonal crystals were prepared by a facile, low-temperature phosphating synthesis strategy. this heterogeneous catalyst, with unique morphol., was first used to activate peroxymonosulfate (PMS) to eliminate sulfadiazine (SDZ). Fe_xP had favorable catalytic activity to activate PMS and could eliminate SDZ up to 98.2% within 24 min. compared to Fe₂O₃ without further phosphatization treatment, P introduction in Fe₂O₃ significantly ameliorated catalytic activity for SDZ elimination; the apparent rate constant (k_obs) increased 9.1 times. Fe_xP particles exhibited a magnetic property convenient for recycling use. this feature is very different from previously reported TMP catalytic materials. four types of reactive oxygen species (sulfate radical [SO₄·^–], OH^–, singlet oxygen [¹O₂], superoxide radical [O₂^·-]) were detected and played a key role in SDZ elimination by ESR (EPR) in conjunction with radical quenching tests. results opened an avenue to develop and utilize TMP catalytic materials for environmental 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 C9H17NO, COA of Formula: C9H17NO.

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

Zhou, Chan published the artcileEfficient activation of peroxymonosulfate on CuS@MIL-101(Fe) spheres featured with abundant sulfur vacancies for coumarin degradation: Performance and mechanisms, HPLC of Formula: 826-36-8, the publication is Separation and Purification Technology (2021), 119404, database is CAplus.

For improving the catalytic activity and recyclability of CuS in Fenton-like reaction processes, novel sulfur vacancies-enriched CuS@MIL-101(Fe) was constructed, characterized, and examined as heterogeneous catalysts for activating peroxymonosulfate (PMS) to degrade coumarin (COU). Thanks to the redox pairs of Fe3+/Fe2+, Cu+/Cu2+, S2-/S2-2/S0/sulfate species, copper-iron synergistic effect and sulfur vacancies, the CuS@MIL-101(Fe) realized a complete removal of COU (30μM) in 10 min with reaction rate constant of 0.577 min-1, which was 11.1 and 17.0 times of CuS and MIL-101(Fe), resp. The effect of various exptl. conditions (i.e., initial pH, CuS@MIL-101(Fe) dosage, PMS concentration, and background anions) on COU degradation was discussed, and the stability and versatility of CuS@MIL-101(Fe) was studied as well. Radical scavenging experiments and ESR (EPR) spectroscopy identified ·OH and 1O2 as the main reactive oxygen species (ROS). Finally, the possible mechanism of higher COU degradation efficiency in the CuS@MIL-101(Fe) activated PMS system and the degradation pathways were also deeply explored. Consequently, this work provided a novel insight into construction of sulfur vacancies-enriched heterogeneous catalysts for efficiently activating PMS for refractory organic pollutants elimination.

Separation and Purification 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 C10H16O2, HPLC of Formula: 826-36-8.

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

Huang, Xixian published the artcileMechanism Insight into Efficient Peroxydisulfate activation by Novel Nano Zero-valent Iron Anchored yCo₃O₄ (nZVI/yCo₃O₄) Composites, Safety of 2,2,6,6-Tetramethylpiperidin-4-one, the publication is Journal of Hazardous Materials (2020), 123157, database is CAplus and MEDLINE.

Novel nano zero-valent iron anchored bio-matrix supported Co₃O₄ (nZVI/yCo₃O₄) composites were fabricated for tetracycline (TC) efficient degradation by activating peroxydisulfate (PS). The systematical characterizations verified that the nZVI/yCo₃O₄ composites with magnetism have higher surface area than yCo₃O₄ and pure Co₃O₄, contributing to more accessible active sites. Various catalytic parameters (nZVI mass ratio, leached ions, initial pH, catalyst dosage, PS concentration and coexisting anions) were thoroughly investigated. In nZVI/yCo₃O₄/PS system, 97.6%, 93.4% and 77.3% TC were degraded within 15 min at pH 3.0, 6.0 and 9.0, resp. Based on four successive degradation runs, the excellent mineralization rate and reusability of nZVI/yCo₃O₄ composites were mainly benefited from the suppressed metals leaching. The PS activated mechanisms were proposed as non-radicals (¹O₂) dominated pattern at acidic conditions and radicals (SO^{â€?/sup>-₄) predominant pattern at alk. environment, which may be highly related to the electron donating capacity of nZVI at different pH and the M(n+1)+/Mn+ redox cycling between Fe or Co metal. The plausible degradation routes of TC were presented based on the detected intermediates. Overall, the synthesized heterogeneous nZVI/yCo₃O₄ composites can efficiently active PS at a wide pH range, and further broaden the application of Co-based catalysts in PS activation.}

Journal of Hazardous 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, Safety of 2,2,6,6-Tetramethylpiperidin-4-one.

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

Huang, Renfeng published the artcileTuning reaction pathways of peroxymonosulfate-based advanced oxidation process via defect engineering, Name: 2,2,6,6-Tetramethylpiperidin-4-one, the publication is Cell Reports Physical Science (2021), 2(9), 100550, database is CAplus.

Peroxymonosulfate (PMS)-based advanced oxidation process (AOP) has attracted great attention as an effective technique for oxidatively decomposing organic pollutants. The PMS activation mechanisms, nevertheless, are still ambiguous in many cases, and, thus, controlling PMS activation pathways for efficient pollutant removal remains challenging. In this work, taking defective PrBa0.5Sr0.5Co1.5Fe0.5O5+v (PBSCF) as a model system, we demonstrate that oxygen vacancies (V•bulo) strongly promote PMS-based AOP, and PMS activation pathways are effectively tuned. Excessive V•bulos are found to modify the surface charge distribution, change PMS adsorption configuration, and break the S-O bond of PMS. As a result, the radical process is promoted, and the predominant nonradical activation pathway shifts from an electron transfer process to singlet oxygen formation. Our mechanistic understanding can guide the rational design of catalysts for efficient water remediation.

Cell Reports Physical Science 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

Wang, Gen published the artcileMonodispersed CuO nanoparticles supported on mineral substrates for groundwater remediation via a nonradical pathway, Computed Properties of 826-36-8, the publication is Journal of Hazardous Materials (2022), 128282, database is CAplus and MEDLINE.

Nonradical oxidation based on singlet oxygen (¹O₂) has attracted great interest in groundwater remediation due to the selective oxidation property and good resistance to background constituents. Herein, recoverable CuO nanoparticles (NPs) supported on mineral substrates (SiO₂) were prepared by calcination of surface-coated metal-plant phenolic networks and explored for peroxymonosulfate (PMS) activation to generate ¹O₂ for degrading organic pollutants in groundwater. CuO NPs with a close particle size (40 nm) were spatially monodispersed on SiO₂ substrates, allowing highly exposure of active sites and consequently leading to outstanding catalytic performance. Efficient removal of various organic pollutants was obtained by the supported CuO NPs/PMS system under wide operation conditions, e.g., working pH, background anions and natural organic matters. Chem. scavenging experiments, ESR tests, furfuryl alc. decay and solvent dependency experiments confirmed the formation of ¹O₂ and its dominant role in pollutants removal. In situ characterization with ATR-FTIR and Raman spectroscopy and computational calculation revealed that a redox cycle of surface Cu(II)-Cu(III)-Cu(II) was responsible for the generation of ¹O₂. The feasibility of the supported CuO NPs/PMS for actual groundwater remediation was evaluated via a flow-through test in a fixed-bed column, which manifested long-term durability, high mineralization ratio and low metal ion leaching.

Journal of Hazardous 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 C6H20Cl2N4, Computed Properties of 826-36-8.

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

Wang, Wentao published the artcileTumor-targeting multi-shelled hollow nanospheres as drug loading platforms for imaging-guided combinational cancer therapy, Synthetic Route of 826-36-8, the publication is Biomaterials Science (2020), 8(6), 1748-1758, database is CAplus and MEDLINE.

In this work, we developed multi-shelled hollow nanospheres [RGD@a_m-ZnO@CuO@Au@DOX HNSs] as multifunctional therapeutic agents to achieve effective and targeted Zn²⁺/Cu²⁺ therapy, induced drug delivery under low pH/red-light conditions, and enhanced phototherapy under single red-light. The photothermal and photodynamic performance of a_m-ZnO@CuO@Au HNSs was enhanced relative to that of a_m-ZnO nanoparticles (NPs) or a_m-ZnO@CuO HNSs by utilizing the resonance energy transfer process and broad red-light absorption. The pH-sensitive a_m-ZnO@CuO@Au HNSs were dissolved to Zn²⁺/Cu²⁺ in the acidic endosomes/lysosomes of cancer cells, resulting in a cancer cell killing effect. The release performance of doxorubicin (DOX) from RGD@a_m-ZnO@CuO@Au@DOX HNSs was evaluated under low pH and red-light-irradiated conditions, and targeting of HNSs was confirmed by dual-modal imaging (magnetic resonance/fluorescence) of the tumor area. Moreover, in vivo synergistic therapy using RGD@a_m-ZnO@CuO@Au@DOX HNSs was further evaluated in mice bearing human pulmonary adenocarcinoma (A549) cells, achieving a remarkable synergistic antitumor effect superior to that obtained by monotherapy. This study validated that RGD@a_m-ZnO@CuO@Au@DOX HNSs can be a promising candidate for efficient postoperative cancer therapy.

Biomaterials Science 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 C2H4ClNO, Synthetic Route of 826-36-8.

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

Chen, Xuan published the artcilePMS activation by magnetic cobalt-N-doped carbon composite for ultra-efficient degradation of refractory organic pollutant: Mechanisms and identification of intermediates, HPLC of Formula: 826-36-8, the publication is Chemosphere (2022), 287(Part_1), 132074, database is CAplus and MEDLINE.

Refractory organic pollutant effluent has led to severe water pollution. In this study, magnetic Co-N-doped carbon hybrid catalysts (Co-NC-x) were fabricated using a facile cation exchange combined pyrolysis and self-reduction technique to activate peroxymonosulfate (PMS) for rehabilitation of the water environment. Factors affecting the catalytic activity of the Co-NC-850 were comprehensively examined 100% of RhB degradation efficiency within 20 min was achieved in the Co-NC-850/PMS system at the optimum conditions (C0 = 80 mg L-1, catalyst loading 0.025 g L-1, PMS concentration 0.8 mM, native pH and 25 °C). The ESR measurements and competitive quenching tests demonstrated that a sulfate radical (SO4â€?) and singlet oxygen (1O2) account for RhB degradation in the Co-NC-850/PMS system, and 1O2 contributed âˆ?6.2% to RhB removal. The synergistic effect of Co0 nanoparticles (NPs) and NC on Co-NC-850 might induce a predominant non-radical route to trigger PMS activation for RhB degradation Direct oxidation of O2â€? by a hydroxyl radical (•OH) might be the crucial process for forming 1O2. Magnetic response and successive cycles verified that Co-NC-850 has superior separable performance and reusability. This innovative magnetic Co-NC-850 hybrid catalyst for PMS activation delivered vast potential for disintegration of refractory organic contaminants.

Chemosphere 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, HPLC of Formula: 826-36-8.

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

Ge, Jia published the artcileA colorimetric smartphone-based platform for pesticides detection using Fe-N/C single-atom nanozyme as oxidase mimetics, Computed Properties of 826-36-8, the publication is Journal of Hazardous Materials (2022), 129199, database is CAplus and MEDLINE.

In this study, a novel highly sensitive colorimetric platform has been designed for malathion assay based on Fe-N/C SAzyme. The as-synthesized SAzyme can directly oxidize 3,3�5,5�tetramethylbenzidine (TMB) to generate blue colored oxidized TMB. L-ascorbic acid-2-phosphate (AA2P), a substrate of acid phosphatase (ACP), could be hydrolyzed to AA, thereafter inhibit the oxidization reaction of TMB, leading to a conspicuous blue color fading. With the addition of malathion hindered the ACP activity and limited the AA production, resulting in the recovery of the catalytic activity of single-atom nanozyme. Under optimized operational conditions, a novel colorimetric assay has been designed for malathion detection with LOD of 0.42 nM. Besides, quantification of malathion in environmental and food samples was achieved based on the proposed strategy. In addition, the successfully integrated paper/smartphone sensor provided sensitive, and rapid, reliable detection of malathion with a LOD of 1 nM.

Journal of Hazardous 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, Computed Properties of 826-36-8.

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

Peng, Guilong published the artcileActivation of peroxymonosulfate by phosphite: Kinetics and mechanism for the removal of organic pollutants, Name: 2,2,6,6-Tetramethylpiperidin-4-one, the publication is Chemosphere (2021), 129016, database is CAplus and MEDLINE.

In this study, phosphite (HPO^2-₃) was used as a novel activator to activate peroxymonosulfate (PMS) for acid orange 7 (AO7) removal. Under the optimized conditions, the decolorization efficiency of AO7 was 82.1% within 60 min with rate constant values (k_obs) of 0.0301 min^-1. Besides, effects of the solution pH and the co-existing inorganic anions including Cl^–, HCO^–₃, HPO^2-₄ and SO^2-₄ on AO7 removal were also investigated. Except for SO^2-₄, other examined co-existing inorganic anions displayed favorable effects on the removal of AO7. Furthermore, the mechanism for PMS activation by the HPO^2-₃ was deeply elucidated by radical scavenger including ethanol (EtOH), tert-butanol (TBA), L-histidine and tiron, and ESR (ESR) studies. It was proposed that singlet oxygen (¹O₂) would be the dominant reactive oxygen species (ROS) in the HPO2-3/PMS system for contamination degradation at neutral pH condition. The findings of this study provided useful information for the application of the substances in industrial wastewaters to activate PMS for organic contaminants degradation and in particular for HPO^2-₃-rich electroplating wastewater treatment.

Chemosphere 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

Kang, Weilu published the artcileMarine colloids promote the adaptation of diatoms to nitrate contamination by directional electron transfer, Related Products of piperidines, the publication is Environmental Science & Technology (2022), 56(9), 5694-5705, database is CAplus and MEDLINE.

Nitrate contamination from human activities (e.g., domestic pollution, livestock breeding, and fertilizer application) threatens marine ecosystems and net primary productivity. As the main component of primary productivity, diatoms can adapt to high nitrate environments, but the mechanism is unclear. We found that electron transfer from marine colloids to diatoms enhances nitrogen uptake and assimilation under visible-light irradiation, providing a new pathway for nitrogen adaptation. Under irradiation, marine colloids exhibit semiconductor properties (e.g., the separation of electron-hole pairs) and can trigger the generation of free electrons and singlet oxygen. They also exhibit electron acceptor and donor properties, with the former being stronger than the latter, reacting with polysaccharides in extracellular polymeric substances (EPSs) under high nitrogen stress, enhancing the elasticity and permeability of cells, and promoting nitrogen assimilation and electron transfer to marine diatom EPSs. Electron transfer promotes extracellular-to-intracellular nitrate transport by upregulating membrane nitrate transporters and nitrate reductase. The upregulation of anion transport genes and unsaturated fatty acids contributes to nitrogen assimilation. We estimate that colloids may increase the nitrate uptake efficiency of marine diatoms by 10.5-82.2%. These findings reveal a mechanism by which diatoms adapt to nitrate contamination and indicate a low-cost strategy to control marine pollution.

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, Related Products of piperidines.

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