Novel heterogeneous Fe-based catalysts for carbon dioxide hydrogenation to long chain α-olefins-A review.

The thermocatalytic conversion of carbon dioxide (CO) into high value-added chemicals provides a strategy to address the environmental problems caused by excessive carbon emissions and the sustainable production of chemicals. Significant progress has been made in the CO hydrogenation to long chain α-olefins, but controlling C-O activation and C-C coupling remains a great challenge. This review focuses on the recent advances in catalyst design concepts for the synthesis of long chain α-olefins from CO hydrogenation.

Effect of glucose pretreatment on Cu-ZnO-AlO catalyzed CO hydrogenation to methanol.

A series of Cu-ZnO-AlO catalysts (CZA) were prepared by glucose pretreatment and applied for methanol synthesis from CO hydrogenation. The advantages of the glucose pretreatment and the effects of glucose content were investigated by XRD, N physisorption, SEM, NO chemisorption, CO-TPD, H-TPR, TG, and XPS characterization techniques. The influence of glucose pretreatment on the average Cu particle size and the interaction between different components, as well as the effects of the amount of glucose on the Cu specific surface area, the ratio of Cu/Cu and the performance of the catalysts were discussed.

Insight into the Compositional Features of Organic Matter in Xilinguole Lignite through Two Mass Spectrometers.

Ethanolysis of lignite is an effective approach for converting organic matter of lignite to liquid coal derivatives. Xilinguole lignite (XL) was reacted with ethanol at 320 °C. Then ethanol and isometric carbon disulfide/acetone mixture were used to extract the reaction mixture in a modified Soxhlet extractor to afford extractable portion 1 (EP) and extractable portion 2 (EP), respectively.

Zwitterionic metal-organic frameworks modified polyamide membranes with enhanced water flux and antifouling capacity.

Antifouling properties are considered to be crucial parameter to polyamide (PA) composite nanofiltration (NF) membranes for practical applications. In this study, an antifouling material, surface zwitterionization of Metal-organic frameworks (Z-MIL-101 (Cr)) was firstly prepared by decorating zwitterionic polymer onto the MOFs surface. Subsequently, a novel type of MOFs-based hybrid membranes were fabricated via mixing the Z-MIL-101 (Cr) nanoparticle with the organic matrix by interfacial polymerization technique.

Anti-inflammatory and PTP1B inhibitory sesquiterpenoids from the twigs and leaves of Aglaia lawii.

Twelve sesquiterpenoids with seven different carbon skeletons, including four isodaucanes (1-4), an aromadendrane (5), a guaiane (6), a cadalane (7), two eudesmanes (8 and 9), two bisabolanes (10 and 11), and a megastigmane (12), were isolated from the twigs and leaves of Aglaia lawii (Wight) C. J. Saldanha et Ramamorthy.

Cu/PCN Metal-Semiconductor Heterojunction by Thermal Reduction for Photoreaction of CO-Aerated HO to CHOH and CHOH.

g-CN-based materials show potential for photoreduction of CO to oxygenates but are subjected to fast recombination of photogenerated charge carriers. Here, a novel Cu-dispersive protonated g-CN (PCN) metal-semiconductor (m-s) heterojunction from thermal reduction of a CuO/PCN precursor was prepared and characterized using in situ X-ray diffraction, scanning transmission electron microscopy, X-ray photoelectron spectroscopy, ultraviolet-visible (UV-vis) spectra, photoluminescence (PL) spectra, transient photocurrent response, and electrochemical impedance spectroscopy (EIS). The Cu amount in Cu/PCN and the reduction temperature affected the generation of CHOH and CHOH from the photoreaction of CO-aerated HO.

Cu/ZnVO Heterojunction Interface Promoted Methanol and Ethanol Generation from CO and HO under UV-Vis Light Irradiation.

Adopting the concurrent reduction of CuO during hydrothermal preparation of ZnVO, metal-semiconductor heterojunction Cu/ZnVO nanorods were synthesized and applied to the catalytic generation of methanol and ethanol from CO aerated water under UV-vis light irradiation. 10Cu/ZnVO obtained from 10 wt % composite amount of CuO exhibited a total carbon yield of 6.49 μmol·g·h.

Structurally diverse halosesquiterpenoids from the red alga Laurencia composita Yamada.

A phytochemical investigation on the MeOH extract of the red alga Laurencia composita Yamada led to the discovery of six new highly halogenated sesquiterpenoids, including two bisabolane-type sesquiterpenoids (1 and 2), one nerolidol derivative (7), and three chamigrane-type sesquiterpenoids (9, 10, and 18), together with 13 known sesquiterpenoids. Their structures, including relative configuration, were elucidated by extensive spectroscopic analysis, and by comparison with data for related known compounds. The absolute configuration at C-10 of laurecomposin A (1) was determined by the modified Mosher's method.

Insight into molecular characteristics of a Chinese coal via separation, characterization, and data processing.

Dayan lignite was subjected to thermal dissolution sequentially with cyclohexane, acetone, and methanol. Each thermal dissolution extract was subjected to further separation/enrichment using column chromatography, which was sequentially eluted with petroleum ether, a mixture of ethyl acetate and petroleum ether (vol:vol = 1:1), and ethyl acetate. The three thermal dissolution extracts and nine enrichment subfractions were characterized by an Orbitrap mass spectrometry equipped with an atmospheric pressure chemical ionization ion source.

Identifying influential spreaders in complex networks by propagation probability dynamics.

Numerous well-known processes of complex systems such as spreading and cascading are mainly affected by a small number of critical nodes. Identifying influential nodes that lead to broad spreading in complex networks is of great theoretical and practical importance. Since the identification of vital nodes is closely related to propagation dynamics, a novel method DynamicRank that employs the probability model to measure the ranking scores of nodes is suggested.

Dictyoptesterols A-C, ∆-24-oxo cholestane-type sterols with potent PTP1B inhibitory activity from the brown alga Dictyopteris undulata Holmes.

Three new cholestane-type sterols bearing an unusual ∆-24-oxo side chain, namely, dictyoptesterols A-C (1-3), were isolated from the brown alga Dictyopteris undulata Holmes, together with five known strutural analogues (4-8). Their structures were elucidated on the basis of by extensive spectroscopic analysis. The absolute configurations of the steroidal nuclei of the new compounds were proposed by a comparison of NMR data with those of related known compounds as well as biogenetic considerations.